v16-0022-CAST-expr-AS-newtype-DEFAULT-ON-ERROR.patch
application/x-patch
Filename: v16-0022-CAST-expr-AS-newtype-DEFAULT-ON-ERROR.patch
Type: application/x-patch
Part: 3
Patch
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GET /api/v1/attachments/:id/patch
the parsed metadata as JSON — format, series position, per-file stats; never the diff bytes.
API reference →
Format: format-patch
Series: patch v16-0022
Subject: CAST(expr AS newtype DEFAULT ON ERROR)
| File | + | − |
|---|---|---|
| contrib/citext/expected/citext_1.out | 5 | 0 |
| contrib/citext/expected/citext.out | 5 | 0 |
| contrib/citext/sql/citext.sql | 2 | 0 |
| contrib/pg_stat_statements/expected/select.out | 22 | 1 |
| contrib/pg_stat_statements/sql/select.sql | 5 | 0 |
| doc/src/sgml/syntax.sgml | 30 | 0 |
| src/backend/executor/execExpr.c | 108 | 1 |
| src/backend/executor/execExprInterp.c | 29 | 0 |
| src/backend/jit/llvm/llvmjit_expr.c | 26 | 0 |
| src/backend/nodes/nodeFuncs.c | 61 | 0 |
| src/backend/optimizer/util/clauses.c | 46 | 5 |
| src/backend/parser/gram.y | 22 | 0 |
| src/backend/parser/parse_agg.c | 9 | 0 |
| src/backend/parser/parse_coerce.c | 64 | 14 |
| src/backend/parser/parse_expr.c | 391 | 21 |
| src/backend/parser/parse_func.c | 3 | 0 |
| src/backend/parser/parse_target.c | 14 | 0 |
| src/backend/parser/parse_type.c | 14 | 0 |
| src/backend/parser/parse_utilcmd.c | 1 | 1 |
| src/backend/utils/adt/arrayfuncs.c | 8 | 0 |
| src/backend/utils/adt/ruleutils.c | 21 | 0 |
| src/backend/utils/fmgr/fmgr.c | 14 | 0 |
| src/include/executor/execExpr.h | 7 | 0 |
| src/include/executor/executor.h | 1 | 0 |
| src/include/fmgr.h | 3 | 0 |
| src/include/nodes/execnodes.h | 21 | 0 |
| src/include/nodes/parsenodes.h | 11 | 0 |
| src/include/nodes/primnodes.h | 36 | 0 |
| src/include/optimizer/optimizer.h | 1 | 1 |
| src/include/parser/parse_coerce.h | 15 | 0 |
| src/include/parser/parse_node.h | 2 | 0 |
| src/include/parser/parse_type.h | 2 | 0 |
| src/test/regress/expected/cast.out | 810 | 0 |
| src/test/regress/expected/create_cast.out | 5 | 0 |
| src/test/regress/expected/equivclass.out | 7 | 0 |
| src/test/regress/parallel_schedule | 1 | 1 |
| src/test/regress/sql/cast.sql | 350 | 0 |
| src/test/regress/sql/create_cast.sql | 1 | 0 |
| src/test/regress/sql/equivclass.sql | 3 | 0 |
| src/tools/pgindent/typedefs.list | 3 | 0 |
From dd49fa74df12eb920faf7a3051e22a186f77edbd Mon Sep 17 00:00:00 2001
From: jian he <jian.universality@gmail.com>
Date: Mon, 15 Dec 2025 12:28:40 +0800
Subject: [PATCH v16 22/23] CAST(expr AS newtype DEFAULT ON ERROR)
# Bumps catversion required.
* With this patchset, most functions in pg_cast.castfunc are now error-safe.
* CoerceViaIO and CoerceToDomain were already error-safe in the HEAD.
* this patch extends error-safe behavior to ArrayCoerceExpr.
* We also ensure that when a coercion fails, execution falls back to evaluating
the specified default node.
* The doc has been refined, though it may still need more review.
demo:
SELECT CAST('1' AS date DEFAULT '2011-01-01' ON ERROR),
CAST('{234,def,567}'::text[] AS integer[] DEFAULT '{-1011}' ON ERROR);
date | int4
------------+---------
2011-01-01 | {-1011}
[0]: https://git.postgresql.org/cgit/postgresql.git/commit/?id=aaaf9449ec6be62cb0d30ed3588dc384f56274b
discussion: https://postgr.es/m/CADkLM=fv1JfY4Ufa-jcwwNbjQixNViskQ8jZu3Tz_p656i_4hQ@mail.gmail.com
---
contrib/citext/expected/citext.out | 5 +
contrib/citext/expected/citext_1.out | 5 +
contrib/citext/sql/citext.sql | 2 +
.../pg_stat_statements/expected/select.out | 23 +-
contrib/pg_stat_statements/sql/select.sql | 5 +
doc/src/sgml/syntax.sgml | 30 +
src/backend/executor/execExpr.c | 109 ++-
src/backend/executor/execExprInterp.c | 29 +
src/backend/jit/llvm/llvmjit_expr.c | 26 +
src/backend/nodes/nodeFuncs.c | 61 ++
src/backend/optimizer/util/clauses.c | 51 +-
src/backend/parser/gram.y | 22 +
src/backend/parser/parse_agg.c | 9 +
src/backend/parser/parse_coerce.c | 78 +-
src/backend/parser/parse_expr.c | 412 ++++++++-
src/backend/parser/parse_func.c | 3 +
src/backend/parser/parse_target.c | 14 +
src/backend/parser/parse_type.c | 14 +
src/backend/parser/parse_utilcmd.c | 2 +-
src/backend/utils/adt/arrayfuncs.c | 8 +
src/backend/utils/adt/ruleutils.c | 21 +
src/backend/utils/fmgr/fmgr.c | 14 +
src/include/executor/execExpr.h | 7 +
src/include/executor/executor.h | 1 +
src/include/fmgr.h | 3 +
src/include/nodes/execnodes.h | 21 +
src/include/nodes/parsenodes.h | 11 +
src/include/nodes/primnodes.h | 36 +
src/include/optimizer/optimizer.h | 2 +-
src/include/parser/parse_coerce.h | 15 +
src/include/parser/parse_node.h | 2 +
src/include/parser/parse_type.h | 2 +
src/test/regress/expected/cast.out | 810 ++++++++++++++++++
src/test/regress/expected/create_cast.out | 5 +
src/test/regress/expected/equivclass.out | 7 +
src/test/regress/parallel_schedule | 2 +-
src/test/regress/sql/cast.sql | 350 ++++++++
src/test/regress/sql/create_cast.sql | 1 +
src/test/regress/sql/equivclass.sql | 3 +
src/tools/pgindent/typedefs.list | 3 +
40 files changed, 2179 insertions(+), 45 deletions(-)
create mode 100644 src/test/regress/expected/cast.out
create mode 100644 src/test/regress/sql/cast.sql
diff --git a/contrib/citext/expected/citext.out b/contrib/citext/expected/citext.out
index 8c0bf54f0f3..33da19d8df4 100644
--- a/contrib/citext/expected/citext.out
+++ b/contrib/citext/expected/citext.out
@@ -10,6 +10,11 @@ WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
--------+---------
(0 rows)
+SELECT CAST('abc'::bpchar AS citext DEFAULT NULL ON CONVERSION ERROR); --error
+ERROR: cannot cast type character to citext when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST('abc'::bpchar AS citext DEFAULT NULL ON CONVERSI...
+ ^
+HINT: Safe type cast for user-defined types are not yet supported
-- Test the operators and indexing functions
-- Test = and <>.
SELECT 'a'::citext = 'a'::citext AS t;
diff --git a/contrib/citext/expected/citext_1.out b/contrib/citext/expected/citext_1.out
index c5e5f180f2b..647eea19142 100644
--- a/contrib/citext/expected/citext_1.out
+++ b/contrib/citext/expected/citext_1.out
@@ -10,6 +10,11 @@ WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
--------+---------
(0 rows)
+SELECT CAST('abc'::bpchar AS citext DEFAULT NULL ON CONVERSION ERROR); --error
+ERROR: cannot cast type character to citext when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST('abc'::bpchar AS citext DEFAULT NULL ON CONVERSI...
+ ^
+HINT: Safe type cast for user-defined types are not yet supported
-- Test the operators and indexing functions
-- Test = and <>.
SELECT 'a'::citext = 'a'::citext AS t;
diff --git a/contrib/citext/sql/citext.sql b/contrib/citext/sql/citext.sql
index aa1cf9abd5c..99794497d47 100644
--- a/contrib/citext/sql/citext.sql
+++ b/contrib/citext/sql/citext.sql
@@ -9,6 +9,8 @@ SELECT amname, opcname
FROM pg_opclass opc LEFT JOIN pg_am am ON am.oid = opcmethod
WHERE opc.oid >= 16384 AND NOT amvalidate(opc.oid);
+SELECT CAST('abc'::bpchar AS citext DEFAULT NULL ON CONVERSION ERROR); --error
+
-- Test the operators and indexing functions
-- Test = and <>.
diff --git a/contrib/pg_stat_statements/expected/select.out b/contrib/pg_stat_statements/expected/select.out
index 75c896f3885..6e67997f0a2 100644
--- a/contrib/pg_stat_statements/expected/select.out
+++ b/contrib/pg_stat_statements/expected/select.out
@@ -73,6 +73,25 @@ SELECT 1 AS "int" OFFSET 2 FETCH FIRST 3 ROW ONLY;
-----
(0 rows)
+--error safe type cast
+SELECT CAST('a' AS int DEFAULT 2 ON CONVERSION ERROR);
+ int4
+------
+ 2
+(1 row)
+
+SELECT CAST('11' AS int DEFAULT 2 ON CONVERSION ERROR);
+ int4
+------
+ 11
+(1 row)
+
+SELECT CAST('12' AS numeric DEFAULT 2 ON CONVERSION ERROR);
+ numeric
+---------
+ 12
+(1 row)
+
-- DISTINCT and ORDER BY patterns
-- Try some query permutations which once produced identical query IDs
SELECT DISTINCT 1 AS "int";
@@ -222,6 +241,8 @@ SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
2 | 2 | SELECT $1 AS "int" ORDER BY 1
1 | 2 | SELECT $1 AS i UNION SELECT $2 ORDER BY i
1 | 1 | SELECT $1 || $2
+ 2 | 2 | SELECT CAST($1 AS int DEFAULT $2 ON CONVERSION ERROR)
+ 1 | 1 | SELECT CAST($1 AS numeric DEFAULT $2 ON CONVERSION ERROR)
2 | 2 | SELECT DISTINCT $1 AS "int"
0 | 0 | SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C"
1 | 1 | SELECT pg_stat_statements_reset() IS NOT NULL AS t
@@ -230,7 +251,7 @@ SELECT calls, rows, query FROM pg_stat_statements ORDER BY query COLLATE "C";
| | ) +
| | SELECT f FROM t ORDER BY f
1 | 1 | select $1::jsonb ? $2
-(17 rows)
+(19 rows)
SELECT pg_stat_statements_reset() IS NOT NULL AS t;
t
diff --git a/contrib/pg_stat_statements/sql/select.sql b/contrib/pg_stat_statements/sql/select.sql
index 11662cde08c..7ee8160fd84 100644
--- a/contrib/pg_stat_statements/sql/select.sql
+++ b/contrib/pg_stat_statements/sql/select.sql
@@ -25,6 +25,11 @@ SELECT 1 AS "int" LIMIT 3 OFFSET 3;
SELECT 1 AS "int" OFFSET 1 FETCH FIRST 2 ROW ONLY;
SELECT 1 AS "int" OFFSET 2 FETCH FIRST 3 ROW ONLY;
+--error safe type cast
+SELECT CAST('a' AS int DEFAULT 2 ON CONVERSION ERROR);
+SELECT CAST('11' AS int DEFAULT 2 ON CONVERSION ERROR);
+SELECT CAST('12' AS numeric DEFAULT 2 ON CONVERSION ERROR);
+
-- DISTINCT and ORDER BY patterns
-- Try some query permutations which once produced identical query IDs
SELECT DISTINCT 1 AS "int";
diff --git a/doc/src/sgml/syntax.sgml b/doc/src/sgml/syntax.sgml
index 34c83880a66..32af9ea061c 100644
--- a/doc/src/sgml/syntax.sgml
+++ b/doc/src/sgml/syntax.sgml
@@ -2106,6 +2106,10 @@ CAST ( <replaceable>expression</replaceable> AS <replaceable>type</replaceable>
The <literal>CAST</literal> syntax conforms to SQL; the syntax with
<literal>::</literal> is historical <productname>PostgreSQL</productname>
usage.
+ The equivalent ON CONVERSION ERROR behavior is:
+<synopsis>
+CAST ( <replaceable>expression</replaceable> AS <replaceable>type</replaceable> ERROR ON CONVERSION ERROR )
+</synopsis>
</para>
<para>
@@ -2160,6 +2164,32 @@ CAST ( <replaceable>expression</replaceable> AS <replaceable>type</replaceable>
<xref linkend="sql-createcast"/>.
</para>
</note>
+
+ <sect3 id="sql-syntax-type-casts-safe">
+ <title>Safe Type Cast</title>
+ <para>
+ A type cast may occasionally fail. To guard against such failures, you can
+ provide an <literal>ON ERROR</literal> clause to handle potential errors.
+ The syntax for safe type cast is:
+<synopsis>
+CAST ( <replaceable>expression</replaceable> AS <replaceable>type</replaceable> DEFAULT <replaceable>expression</replaceable> ON CONVERSION ERROR )
+</synopsis>
+ If the type cast fails, instead of error out, evaluation falls back to the
+ default <replaceable>expression</replaceable> specified in the <literal>ON ERROR</literal> clause.
+ At present, this only support built-in type casts; see <xref linkend="catalog-pg-cast"/>.
+ User-defined type casts created with <link linkend="sql-createcast">CREATE CAST</link> are not supported.
+ </para>
+
+ <para>
+ Some examples:
+<screen>
+SELECT CAST(TEXT 'error' AS integer DEFAULT 3 ON CONVERSION ERROR);
+<lineannotation>Result: </lineannotation><computeroutput>3</computeroutput>
+SELECT CAST(TEXT 'error' AS numeric DEFAULT 1.1 ON CONVERSION ERROR);
+<lineannotation>Result: </lineannotation><computeroutput>1.1</computeroutput>
+</screen>
+ </para>
+ </sect3>
</sect2>
<sect2 id="sql-syntax-collate-exprs">
diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c
index c35744b105e..12ec679b90b 100644
--- a/src/backend/executor/execExpr.c
+++ b/src/backend/executor/execExpr.c
@@ -99,6 +99,9 @@ static void ExecBuildAggTransCall(ExprState *state, AggState *aggstate,
static void ExecInitJsonExpr(JsonExpr *jsexpr, ExprState *state,
Datum *resv, bool *resnull,
ExprEvalStep *scratch);
+static void ExecInitSafeTypeCastExpr(SafeTypeCastExpr *stcexpr, ExprState *state,
+ Datum *resv, bool *resnull,
+ ExprEvalStep *scratch);
static void ExecInitJsonCoercion(ExprState *state, JsonReturning *returning,
ErrorSaveContext *escontext, bool omit_quotes,
bool exists_coerce,
@@ -170,6 +173,47 @@ ExecInitExpr(Expr *node, PlanState *parent)
return state;
}
+/*
+ * ExecInitExprSafe: soft error variant of ExecInitExpr.
+ *
+ * use it only for expression nodes support soft errors, not all expression
+ * nodes support it.
+*/
+ExprState *
+ExecInitExprSafe(Expr *node, PlanState *parent)
+{
+ ExprState *state;
+ ExprEvalStep scratch = {0};
+
+ /* Special case: NULL expression produces a NULL ExprState pointer */
+ if (node == NULL)
+ return NULL;
+
+ /* Initialize ExprState with empty step list */
+ state = makeNode(ExprState);
+ state->expr = node;
+ state->parent = parent;
+ state->ext_params = NULL;
+ state->escontext = makeNode(ErrorSaveContext);
+ state->escontext->type = T_ErrorSaveContext;
+ state->escontext->error_occurred = false;
+ state->escontext->details_wanted = false;
+
+ /* Insert setup steps as needed */
+ ExecCreateExprSetupSteps(state, (Node *) node);
+
+ /* Compile the expression proper */
+ ExecInitExprRec(node, state, &state->resvalue, &state->resnull);
+
+ /* Finally, append a DONE step */
+ scratch.opcode = EEOP_DONE_RETURN;
+ ExprEvalPushStep(state, &scratch);
+
+ ExecReadyExpr(state);
+
+ return state;
+}
+
/*
* ExecInitExprWithParams: prepare a standalone expression tree for execution
*
@@ -1701,6 +1745,7 @@ ExecInitExprRec(Expr *node, ExprState *state,
elemstate->innermost_caseval = palloc_object(Datum);
elemstate->innermost_casenull = palloc_object(bool);
+ elemstate->escontext = state->escontext;
ExecInitExprRec(acoerce->elemexpr, elemstate,
&elemstate->resvalue, &elemstate->resnull);
@@ -2176,6 +2221,14 @@ ExecInitExprRec(Expr *node, ExprState *state,
break;
}
+ case T_SafeTypeCastExpr:
+ {
+ SafeTypeCastExpr *stcexpr = castNode(SafeTypeCastExpr, node);
+
+ ExecInitSafeTypeCastExpr(stcexpr, state, resv, resnull, &scratch);
+ break;
+ }
+
case T_CoalesceExpr:
{
CoalesceExpr *coalesce = (CoalesceExpr *) node;
@@ -2736,7 +2789,7 @@ ExecInitFunc(ExprEvalStep *scratch, Expr *node, List *args, Oid funcid,
/* Initialize function call parameter structure too */
InitFunctionCallInfoData(*fcinfo, flinfo,
- nargs, inputcollid, NULL, NULL);
+ nargs, inputcollid, (Node *) state->escontext, NULL);
/* Keep extra copies of this info to save an indirection at runtime */
scratch->d.func.fn_addr = flinfo->fn_addr;
@@ -4733,6 +4786,60 @@ ExecBuildParamSetEqual(TupleDesc desc,
return state;
}
+/*
+ * Push steps to evaluate a SafeTypeCastExpr and its various subsidiary
+ * expressions.
+ */
+static void
+ExecInitSafeTypeCastExpr(SafeTypeCastExpr *stcexpr , ExprState *state,
+ Datum *resv, bool *resnull,
+ ExprEvalStep *scratch)
+{
+ /*
+ * If we can not coerce to the target type, fallback to the DEFAULT
+ * expression specified in the ON CONVERSION ERROR clause, and we are done.
+ */
+ if (stcexpr->cast_expr == NULL)
+ {
+ ExecInitExprRec((Expr *) stcexpr->default_expr,
+ state, resv, resnull);
+ return;
+ }
+ else
+ {
+ SafeTypeCastState *stcstate;
+
+ stcstate = palloc0(sizeof(SafeTypeCastState));
+ stcstate->stcexpr = stcexpr;
+ stcstate->escontext.type = T_ErrorSaveContext;
+ state->escontext = &stcstate->escontext;
+
+ /* evaluate argument expression into step's result area */
+ ExecInitExprRec((Expr *) stcexpr->cast_expr,
+ state, resv, resnull);
+ scratch->opcode = EEOP_SAFETYPE_CAST;
+ scratch->d.stcexpr.stcstate = stcstate;
+ ExprEvalPushStep(state, scratch);
+
+ /*
+ * Steps to evaluate the DEFAULT expression. Skip it if this is a
+ * binary coercion cast.
+ */
+ if (!IsA(stcexpr->cast_expr, RelabelType))
+ {
+ ErrorSaveContext *saved_escontext;
+
+ saved_escontext = state->escontext;
+ state->escontext = NULL;
+ ExecInitExprRec((Expr *) stcstate->stcexpr->default_expr,
+ state, resv, resnull);
+ state->escontext = saved_escontext;
+ }
+
+ stcstate->jump_end = state->steps_len;
+ }
+}
+
/*
* Push steps to evaluate a JsonExpr and its various subsidiary expressions.
*/
diff --git a/src/backend/executor/execExprInterp.c b/src/backend/executor/execExprInterp.c
index 1d88cdd2cb4..ca6e0fd56cd 100644
--- a/src/backend/executor/execExprInterp.c
+++ b/src/backend/executor/execExprInterp.c
@@ -568,6 +568,7 @@ ExecInterpExpr(ExprState *state, ExprContext *econtext, bool *isnull)
&&CASE_EEOP_XMLEXPR,
&&CASE_EEOP_JSON_CONSTRUCTOR,
&&CASE_EEOP_IS_JSON,
+ &&CASE_EEOP_SAFETYPE_CAST,
&&CASE_EEOP_JSONEXPR_PATH,
&&CASE_EEOP_JSONEXPR_COERCION,
&&CASE_EEOP_JSONEXPR_COERCION_FINISH,
@@ -1926,6 +1927,28 @@ ExecInterpExpr(ExprState *state, ExprContext *econtext, bool *isnull)
EEO_NEXT();
}
+ EEO_CASE(EEOP_SAFETYPE_CAST)
+ {
+ SafeTypeCastState *stcstate = op->d.stcexpr.stcstate;
+
+ if (SOFT_ERROR_OCCURRED(&stcstate->escontext))
+ {
+ *op->resvalue = (Datum) 0;
+ *op->resnull = true;
+
+ /*
+ * Reset for next use such as for catching errors when coercing
+ * a expression.
+ */
+ stcstate->escontext.error_occurred = false;
+ stcstate->escontext.details_wanted = false;
+
+ EEO_NEXT();
+ }
+ else
+ EEO_JUMP(stcstate->jump_end);
+ }
+
EEO_CASE(EEOP_JSONEXPR_PATH)
{
/* too complex for an inline implementation */
@@ -3644,6 +3667,12 @@ ExecEvalArrayCoerce(ExprState *state, ExprEvalStep *op, ExprContext *econtext)
econtext,
op->d.arraycoerce.resultelemtype,
op->d.arraycoerce.amstate);
+
+ if (SOFT_ERROR_OCCURRED(op->d.arraycoerce.elemexprstate->escontext))
+ {
+ *op->resvalue = (Datum) 0;
+ *op->resnull = true;
+ }
}
/*
diff --git a/src/backend/jit/llvm/llvmjit_expr.c b/src/backend/jit/llvm/llvmjit_expr.c
index f9c7f29e728..db9f4928619 100644
--- a/src/backend/jit/llvm/llvmjit_expr.c
+++ b/src/backend/jit/llvm/llvmjit_expr.c
@@ -2256,6 +2256,32 @@ llvm_compile_expr(ExprState *state)
LLVMBuildBr(b, opblocks[opno + 1]);
break;
+ case EEOP_SAFETYPE_CAST:
+ {
+ SafeTypeCastState *stcstate = op->d.stcexpr.stcstate;
+
+ if (SOFT_ERROR_OCCURRED(&stcstate->escontext))
+ {
+ /*
+ * Reset for next use such as for catching errors when
+ * coercing a expression.
+ */
+ stcstate->escontext.error_occurred = false;
+ stcstate->escontext.details_wanted = false;
+
+ /* set resnull to true */
+ LLVMBuildStore(b, l_sbool_const(1), v_resnullp);
+ /* reset resvalue */
+ LLVMBuildStore(b, l_datum_const(0), v_resvaluep);
+
+ LLVMBuildBr(b, opblocks[opno + 1]);
+ }
+ else
+ LLVMBuildBr(b, opblocks[stcstate->jump_end]);
+
+ break;
+ }
+
case EEOP_JSONEXPR_PATH:
{
JsonExprState *jsestate = op->d.jsonexpr.jsestate;
diff --git a/src/backend/nodes/nodeFuncs.c b/src/backend/nodes/nodeFuncs.c
index 024a2b2fd84..8a8d15ca6f5 100644
--- a/src/backend/nodes/nodeFuncs.c
+++ b/src/backend/nodes/nodeFuncs.c
@@ -206,6 +206,9 @@ exprType(const Node *expr)
case T_RowCompareExpr:
type = BOOLOID;
break;
+ case T_SafeTypeCastExpr:
+ type = ((const SafeTypeCastExpr *) expr)->resulttype;
+ break;
case T_CoalesceExpr:
type = ((const CoalesceExpr *) expr)->coalescetype;
break;
@@ -450,6 +453,8 @@ exprTypmod(const Node *expr)
return typmod;
}
break;
+ case T_SafeTypeCastExpr:
+ return ((const SafeTypeCastExpr *) expr)->resulttypmod;
case T_CoalesceExpr:
{
/*
@@ -965,6 +970,9 @@ exprCollation(const Node *expr)
/* RowCompareExpr's result is boolean ... */
coll = InvalidOid; /* ... so it has no collation */
break;
+ case T_SafeTypeCastExpr:
+ coll = ((const SafeTypeCastExpr *) expr)->resultcollid;
+ break;
case T_CoalesceExpr:
coll = ((const CoalesceExpr *) expr)->coalescecollid;
break;
@@ -1232,6 +1240,9 @@ exprSetCollation(Node *expr, Oid collation)
/* RowCompareExpr's result is boolean ... */
Assert(!OidIsValid(collation)); /* ... so never set a collation */
break;
+ case T_SafeTypeCastExpr:
+ ((SafeTypeCastExpr *) expr)->resultcollid = collation;
+ break;
case T_CoalesceExpr:
((CoalesceExpr *) expr)->coalescecollid = collation;
break;
@@ -1550,6 +1561,9 @@ exprLocation(const Node *expr)
/* just use leftmost argument's location */
loc = exprLocation((Node *) ((const RowCompareExpr *) expr)->largs);
break;
+ case T_SafeTypeCastExpr:
+ loc = ((const SafeTypeCastExpr *) expr)->location;
+ break;
case T_CoalesceExpr:
/* COALESCE keyword should always be the first thing */
loc = ((const CoalesceExpr *) expr)->location;
@@ -2321,6 +2335,18 @@ expression_tree_walker_impl(Node *node,
return true;
}
break;
+ case T_SafeTypeCastExpr:
+ {
+ SafeTypeCastExpr *scexpr = (SafeTypeCastExpr *) node;
+
+ if (WALK(scexpr->source_expr))
+ return true;
+ if (WALK(scexpr->cast_expr))
+ return true;
+ if (WALK(scexpr->default_expr))
+ return true;
+ }
+ break;
case T_CoalesceExpr:
return WALK(((CoalesceExpr *) node)->args);
case T_MinMaxExpr:
@@ -3330,6 +3356,19 @@ expression_tree_mutator_impl(Node *node,
return (Node *) newnode;
}
break;
+ case T_SafeTypeCastExpr:
+ {
+ SafeTypeCastExpr *scexpr = (SafeTypeCastExpr *) node;
+ SafeTypeCastExpr *newnode;
+
+ FLATCOPY(newnode, scexpr, SafeTypeCastExpr);
+ MUTATE(newnode->source_expr, scexpr->source_expr, Node *);
+ MUTATE(newnode->cast_expr, scexpr->cast_expr, Node *);
+ MUTATE(newnode->default_expr, scexpr->default_expr, Node *);
+
+ return (Node *) newnode;
+ }
+ break;
case T_CoalesceExpr:
{
CoalesceExpr *coalesceexpr = (CoalesceExpr *) node;
@@ -4464,6 +4503,28 @@ raw_expression_tree_walker_impl(Node *node,
return true;
}
break;
+ case T_SafeTypeCast:
+ {
+ SafeTypeCast *sc = (SafeTypeCast *) node;
+
+ if (WALK(sc->cast))
+ return true;
+ if (WALK(sc->raw_default))
+ return true;
+ }
+ break;
+ case T_SafeTypeCastExpr:
+ {
+ SafeTypeCastExpr *stc = (SafeTypeCastExpr *) node;
+
+ if (WALK(stc->source_expr))
+ return true;
+ if (WALK(stc->cast_expr))
+ return true;
+ if (WALK(stc->default_expr))
+ return true;
+ }
+ break;
case T_CollateClause:
return WALK(((CollateClause *) node)->arg);
case T_SortBy:
diff --git a/src/backend/optimizer/util/clauses.c b/src/backend/optimizer/util/clauses.c
index ddafc21c819..54046b12587 100644
--- a/src/backend/optimizer/util/clauses.c
+++ b/src/backend/optimizer/util/clauses.c
@@ -2447,7 +2447,8 @@ estimate_expression_value(PlannerInfo *root, Node *node)
((Node *) evaluate_expr((Expr *) (node), \
exprType((Node *) (node)), \
exprTypmod((Node *) (node)), \
- exprCollation((Node *) (node))))
+ exprCollation((Node *) (node)), \
+ false))
/*
* Recursive guts of eval_const_expressions/estimate_expression_value
@@ -2958,6 +2959,32 @@ eval_const_expressions_mutator(Node *node,
copyObject(jve->format));
}
+ case T_SafeTypeCastExpr:
+ {
+ SafeTypeCastExpr *stc = (SafeTypeCastExpr *) node;
+ SafeTypeCastExpr *newexpr;
+ Node *source_expr = stc->source_expr;
+ Node *default_expr = stc->default_expr;
+
+ source_expr = eval_const_expressions_mutator(source_expr, context);
+ default_expr = eval_const_expressions_mutator(default_expr, context);
+
+ /*
+ * We must not reduce any recognizably constant subexpressions
+ * in cast_expr here, since we don’t want it to fail
+ * prematurely.
+ */
+ newexpr = makeNode(SafeTypeCastExpr);
+ newexpr->source_expr = source_expr;
+ newexpr->cast_expr = stc->cast_expr;
+ newexpr->default_expr = default_expr;
+ newexpr->resulttype = stc->resulttype;
+ newexpr->resulttypmod = stc->resulttypmod;
+ newexpr->resultcollid = stc->resultcollid;
+
+ return (Node *) newexpr;
+ }
+
case T_SubPlan:
case T_AlternativeSubPlan:
@@ -3380,7 +3407,8 @@ eval_const_expressions_mutator(Node *node,
return (Node *) evaluate_expr((Expr *) svf,
svf->type,
svf->typmod,
- InvalidOid);
+ InvalidOid,
+ false);
else
return copyObject((Node *) svf);
}
@@ -4698,7 +4726,7 @@ evaluate_function(Oid funcid, Oid result_type, int32 result_typmod,
newexpr->location = -1;
return evaluate_expr((Expr *) newexpr, result_type, result_typmod,
- result_collid);
+ result_collid, false);
}
/*
@@ -5152,10 +5180,14 @@ sql_inline_error_callback(void *arg)
*
* We use the executor's routine ExecEvalExpr() to avoid duplication of
* code and ensure we get the same result as the executor would get.
+ *
+ * When error_safe is set to true, we will evaluate the constant expression in a
+ * error safe way. If the evaluation fails, return NULL instead of throwing an
+ * error.
*/
Expr *
evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
- Oid result_collation)
+ Oid result_collation, bool error_safe)
{
EState *estate;
ExprState *exprstate;
@@ -5180,7 +5212,10 @@ evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
* Prepare expr for execution. (Note: we can't use ExecPrepareExpr
* because it'd result in recursively invoking eval_const_expressions.)
*/
- exprstate = ExecInitExpr(expr, NULL);
+ if (error_safe)
+ exprstate = ExecInitExprSafe(expr, NULL);
+ else
+ exprstate = ExecInitExpr(expr, NULL);
/*
* And evaluate it.
@@ -5200,6 +5235,12 @@ evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
/* Get back to outer memory context */
MemoryContextSwitchTo(oldcontext);
+ if (error_safe && SOFT_ERROR_OCCURRED(exprstate->escontext))
+ {
+ FreeExecutorState(estate);
+ return NULL;
+ }
+
/*
* Must copy result out of sub-context used by expression eval.
*
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index 7856ce9d78f..9e6573444cc 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -16013,6 +16013,28 @@ func_expr_common_subexpr:
}
| CAST '(' a_expr AS Typename ')'
{ $$ = makeTypeCast($3, $5, @1); }
+ | CAST '(' a_expr AS Typename ERROR_P ON CONVERSION_P ERROR_P ')'
+ { $$ = makeTypeCast($3, $5, @1); }
+ | CAST '(' a_expr AS Typename NULL_P ON CONVERSION_P ERROR_P ')'
+ {
+ TypeCast *cast = (TypeCast *) makeTypeCast($3, $5, @1);
+
+ SafeTypeCast *safecast = makeNode(SafeTypeCast);
+ safecast->cast = (Node *) cast;
+ safecast->raw_default = makeNullAConst(-1);;
+
+ $$ = (Node *) safecast;
+ }
+ | CAST '(' a_expr AS Typename DEFAULT a_expr ON CONVERSION_P ERROR_P ')'
+ {
+ TypeCast *cast = (TypeCast *) makeTypeCast($3, $5, @1);
+
+ SafeTypeCast *safecast = makeNode(SafeTypeCast);
+ safecast->cast = (Node *) cast;
+ safecast->raw_default = $7;
+
+ $$ = (Node *) safecast;
+ }
| EXTRACT '(' extract_list ')'
{
$$ = (Node *) makeFuncCall(SystemFuncName("extract"),
diff --git a/src/backend/parser/parse_agg.c b/src/backend/parser/parse_agg.c
index b8340557b34..de77f6e9302 100644
--- a/src/backend/parser/parse_agg.c
+++ b/src/backend/parser/parse_agg.c
@@ -490,6 +490,12 @@ check_agglevels_and_constraints(ParseState *pstate, Node *expr)
err = _("grouping operations are not allowed in check constraints");
break;
+ case EXPR_KIND_CAST_DEFAULT:
+ if (isAgg)
+ err = _("aggregate functions are not allowed in CAST DEFAULT expressions");
+ else
+ err = _("grouping operations are not allowed in CAST DEFAULT expressions");
+ break;
case EXPR_KIND_COLUMN_DEFAULT:
case EXPR_KIND_FUNCTION_DEFAULT:
@@ -983,6 +989,9 @@ transformWindowFuncCall(ParseState *pstate, WindowFunc *wfunc,
case EXPR_KIND_DOMAIN_CHECK:
err = _("window functions are not allowed in check constraints");
break;
+ case EXPR_KIND_CAST_DEFAULT:
+ err = _("window functions are not allowed in CAST DEFAULT expressions");
+ break;
case EXPR_KIND_COLUMN_DEFAULT:
case EXPR_KIND_FUNCTION_DEFAULT:
err = _("window functions are not allowed in DEFAULT expressions");
diff --git a/src/backend/parser/parse_coerce.c b/src/backend/parser/parse_coerce.c
index 78b1e366ad7..4ae87e2030b 100644
--- a/src/backend/parser/parse_coerce.c
+++ b/src/backend/parser/parse_coerce.c
@@ -81,6 +81,31 @@ coerce_to_target_type(ParseState *pstate, Node *expr, Oid exprtype,
CoercionContext ccontext,
CoercionForm cformat,
int location)
+{
+ return coerce_to_target_type_extended(pstate,
+ expr,
+ exprtype,
+ targettype,
+ targettypmod,
+ ccontext,
+ cformat,
+ location,
+ NULL);
+}
+
+/*
+ * escontext: If not NULL, expr (Unknown Const node type) will be coerced to the
+ * target type in an error-safe way. If it fails, NULL is returned.
+ *
+ * For other parameters, see above coerce_to_target_type.
+ */
+Node *
+coerce_to_target_type_extended(ParseState *pstate, Node *expr, Oid exprtype,
+ Oid targettype, int32 targettypmod,
+ CoercionContext ccontext,
+ CoercionForm cformat,
+ int location,
+ Node *escontext)
{
Node *result;
Node *origexpr;
@@ -102,9 +127,12 @@ coerce_to_target_type(ParseState *pstate, Node *expr, Oid exprtype,
while (expr && IsA(expr, CollateExpr))
expr = (Node *) ((CollateExpr *) expr)->arg;
- result = coerce_type(pstate, expr, exprtype,
- targettype, targettypmod,
- ccontext, cformat, location);
+ result = coerce_type_extend(pstate, expr, exprtype,
+ targettype, targettypmod,
+ ccontext, cformat, location,
+ escontext);
+ if (SOFT_ERROR_OCCURRED(escontext))
+ return NULL;
/*
* If the target is a fixed-length type, it may need a length coercion as
@@ -158,6 +186,18 @@ Node *
coerce_type(ParseState *pstate, Node *node,
Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,
CoercionContext ccontext, CoercionForm cformat, int location)
+{
+ return coerce_type_extend(pstate, node,
+ inputTypeId, targetTypeId, targetTypeMod,
+ ccontext, cformat, location, NULL);
+}
+
+Node *
+coerce_type_extend(ParseState *pstate, Node *node,
+ Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,
+ CoercionContext ccontext, CoercionForm cformat,
+ int location,
+ Node *escontext)
{
Node *result;
CoercionPathType pathtype;
@@ -256,6 +296,8 @@ coerce_type(ParseState *pstate, Node *node,
int32 inputTypeMod;
Type baseType;
ParseCallbackState pcbstate;
+ char *string;
+ bool coercion_failed = false;
/*
* If the target type is a domain, we want to call its base type's
@@ -308,21 +350,27 @@ coerce_type(ParseState *pstate, Node *node,
* We assume here that UNKNOWN's internal representation is the same
* as CSTRING.
*/
- if (!con->constisnull)
- newcon->constvalue = stringTypeDatum(baseType,
- DatumGetCString(con->constvalue),
- inputTypeMod);
+ if (con->constisnull)
+ string = NULL;
else
- newcon->constvalue = stringTypeDatum(baseType,
- NULL,
- inputTypeMod);
+ string = DatumGetCString(con->constvalue);
+
+ if (!stringTypeDatumSafe(baseType,
+ string,
+ inputTypeMod,
+ escontext,
+ &newcon->constvalue))
+ {
+ coercion_failed = true;
+ newcon->constisnull = true;
+ }
/*
* If it's a varlena value, force it to be in non-expanded
* (non-toasted) format; this avoids any possible dependency on
* external values and improves consistency of representation.
*/
- if (!con->constisnull && newcon->constlen == -1)
+ if (!coercion_failed && !con->constisnull && newcon->constlen == -1)
newcon->constvalue =
PointerGetDatum(PG_DETOAST_DATUM(newcon->constvalue));
@@ -339,7 +387,7 @@ coerce_type(ParseState *pstate, Node *node,
* identical may not get recognized as such. See pgsql-hackers
* discussion of 2008-04-04.
*/
- if (!con->constisnull && !newcon->constbyval)
+ if (!coercion_failed && !con->constisnull && !newcon->constbyval)
{
Datum val2;
@@ -358,8 +406,10 @@ coerce_type(ParseState *pstate, Node *node,
result = (Node *) newcon;
- /* If target is a domain, apply constraints. */
- if (baseTypeId != targetTypeId)
+ if (coercion_failed)
+ result = NULL;
+ else if (baseTypeId != targetTypeId)
+ /* If target is a domain, apply constraints. */
result = coerce_to_domain(result,
baseTypeId, baseTypeMod,
targetTypeId,
diff --git a/src/backend/parser/parse_expr.c b/src/backend/parser/parse_expr.c
index 6b8fa15fca3..a10ec64a708 100644
--- a/src/backend/parser/parse_expr.c
+++ b/src/backend/parser/parse_expr.c
@@ -17,6 +17,7 @@
#include "access/htup_details.h"
#include "catalog/pg_aggregate.h"
+#include "catalog/pg_cast.h"
#include "catalog/pg_type.h"
#include "miscadmin.h"
#include "nodes/makefuncs.h"
@@ -37,6 +38,7 @@
#include "utils/date.h"
#include "utils/fmgroids.h"
#include "utils/lsyscache.h"
+#include "utils/syscache.h"
#include "utils/timestamp.h"
#include "utils/xml.h"
@@ -60,7 +62,8 @@ static Node *transformMultiAssignRef(ParseState *pstate, MultiAssignRef *maref);
static Node *transformCaseExpr(ParseState *pstate, CaseExpr *c);
static Node *transformSubLink(ParseState *pstate, SubLink *sublink);
static Node *transformArrayExpr(ParseState *pstate, A_ArrayExpr *a,
- Oid array_type, Oid element_type, int32 typmod);
+ Oid array_type, Oid element_type, int32 typmod,
+ bool *can_coerce);
static Node *transformRowExpr(ParseState *pstate, RowExpr *r, bool allowDefault);
static Node *transformCoalesceExpr(ParseState *pstate, CoalesceExpr *c);
static Node *transformMinMaxExpr(ParseState *pstate, MinMaxExpr *m);
@@ -76,6 +79,10 @@ static Node *transformWholeRowRef(ParseState *pstate,
int sublevels_up, int location);
static Node *transformIndirection(ParseState *pstate, A_Indirection *ind);
static Node *transformTypeCast(ParseState *pstate, TypeCast *tc);
+static Node *transformTypeSafeCast(ParseState *pstate, SafeTypeCast *tc);
+static void CoercionErrorSafeCheck(ParseState *pstate, Node *castexpr,
+ Node *sourceexpr, Oid inputType,
+ Oid targetType);
static Node *transformCollateClause(ParseState *pstate, CollateClause *c);
static Node *transformJsonObjectConstructor(ParseState *pstate,
JsonObjectConstructor *ctor);
@@ -164,13 +171,17 @@ transformExprRecurse(ParseState *pstate, Node *expr)
case T_A_ArrayExpr:
result = transformArrayExpr(pstate, (A_ArrayExpr *) expr,
- InvalidOid, InvalidOid, -1);
+ InvalidOid, InvalidOid, -1, NULL);
break;
case T_TypeCast:
result = transformTypeCast(pstate, (TypeCast *) expr);
break;
+ case T_SafeTypeCast:
+ result = transformTypeSafeCast(pstate, (SafeTypeCast *) expr);
+ break;
+
case T_CollateClause:
result = transformCollateClause(pstate, (CollateClause *) expr);
break;
@@ -564,6 +575,7 @@ transformColumnRef(ParseState *pstate, ColumnRef *cref)
case EXPR_KIND_VALUES_SINGLE:
case EXPR_KIND_CHECK_CONSTRAINT:
case EXPR_KIND_DOMAIN_CHECK:
+ case EXPR_KIND_CAST_DEFAULT:
case EXPR_KIND_FUNCTION_DEFAULT:
case EXPR_KIND_INDEX_EXPRESSION:
case EXPR_KIND_INDEX_PREDICATE:
@@ -1824,6 +1836,9 @@ transformSubLink(ParseState *pstate, SubLink *sublink)
case EXPR_KIND_DOMAIN_CHECK:
err = _("cannot use subquery in check constraint");
break;
+ case EXPR_KIND_CAST_DEFAULT:
+ err = _("cannot use subquery in CAST DEFAULT expression");
+ break;
case EXPR_KIND_COLUMN_DEFAULT:
case EXPR_KIND_FUNCTION_DEFAULT:
err = _("cannot use subquery in DEFAULT expression");
@@ -2011,17 +2026,24 @@ transformSubLink(ParseState *pstate, SubLink *sublink)
* If the caller specifies the target type, the resulting array will
* be of exactly that type. Otherwise we try to infer a common type
* for the elements using select_common_type().
+ *
+ * Most of the time, can_coerce will be NULL. It is not NULL only when
+ * performing parse analysis for CAST(DEFAULT ... ON CONVERSION ERROR)
+ * expression. It's default to true. If coercing array elements fails, it will
+ * be set to false.
*/
static Node *
transformArrayExpr(ParseState *pstate, A_ArrayExpr *a,
- Oid array_type, Oid element_type, int32 typmod)
+ Oid array_type, Oid element_type, int32 typmod, bool *can_coerce)
{
ArrayExpr *newa = makeNode(ArrayExpr);
List *newelems = NIL;
List *newcoercedelems = NIL;
ListCell *element;
Oid coerce_type;
+ Oid coerce_type_coll;
bool coerce_hard;
+ ErrorSaveContext escontext = {T_ErrorSaveContext};
/*
* Transform the element expressions
@@ -2045,9 +2067,10 @@ transformArrayExpr(ParseState *pstate, A_ArrayExpr *a,
(A_ArrayExpr *) e,
array_type,
element_type,
- typmod);
+ typmod,
+ can_coerce);
/* we certainly have an array here */
- Assert(array_type == InvalidOid || array_type == exprType(newe));
+ Assert(can_coerce || array_type == InvalidOid || array_type == exprType(newe));
newa->multidims = true;
}
else
@@ -2088,6 +2111,9 @@ transformArrayExpr(ParseState *pstate, A_ArrayExpr *a,
}
else
{
+ /* Target type must valid for CAST DEFAULT */
+ Assert(can_coerce == NULL);
+
/* Can't handle an empty array without a target type */
if (newelems == NIL)
ereport(ERROR,
@@ -2125,6 +2151,8 @@ transformArrayExpr(ParseState *pstate, A_ArrayExpr *a,
coerce_hard = false;
}
+ coerce_type_coll = get_typcollation(coerce_type);
+
/*
* Coerce elements to target type
*
@@ -2134,28 +2162,82 @@ transformArrayExpr(ParseState *pstate, A_ArrayExpr *a,
* If the array's type was merely derived from the common type of its
* elements, then the elements are implicitly coerced to the common type.
* This is consistent with other uses of select_common_type().
+ *
+ * If can_coerce is not NULL, we need to safely test whether each element
+ * can be coerced to the target type, similar to what is done in
+ * transformTypeSafeCast.
*/
foreach(element, newelems)
{
Node *e = (Node *) lfirst(element);
- Node *newe;
+ Node *newe = NULL;
if (coerce_hard)
{
- newe = coerce_to_target_type(pstate, e,
- exprType(e),
- coerce_type,
- typmod,
- COERCION_EXPLICIT,
- COERCE_EXPLICIT_CAST,
- -1);
- if (newe == NULL)
- ereport(ERROR,
- (errcode(ERRCODE_CANNOT_COERCE),
- errmsg("cannot cast type %s to %s",
- format_type_be(exprType(e)),
- format_type_be(coerce_type)),
- parser_errposition(pstate, exprLocation(e))));
+ /*
+ * Can not coerce, just append the transformed element expression to
+ * the list.
+ */
+ if (can_coerce && (!*can_coerce))
+ newe = e;
+ else
+ {
+ Node *ecopy = NULL;
+
+ if (can_coerce)
+ ecopy = copyObject(e);
+
+ newe = coerce_to_target_type_extended(pstate, e,
+ exprType(e),
+ coerce_type,
+ typmod,
+ COERCION_EXPLICIT,
+ COERCE_EXPLICIT_CAST,
+ -1,
+ (Node *) &escontext);
+ if (newe == NULL)
+ {
+ if (!can_coerce)
+ ereport(ERROR,
+ (errcode(ERRCODE_CANNOT_COERCE),
+ errmsg("cannot cast type %s to %s",
+ format_type_be(exprType(e)),
+ format_type_be(coerce_type)),
+ parser_errposition(pstate, exprLocation(e))));
+ else
+ {
+ /*
+ * Can not coerce, just append the transformed element
+ * expression to the list.
+ */
+ newe = ecopy;
+ *can_coerce = false;
+ }
+ }
+ else if (can_coerce && IsA(ecopy, Const) && IsA(newe, FuncExpr))
+ {
+ Node *result;
+
+ /*
+ * pre-evaluate simple constant cast expressions in a way
+ * that tolerate errors.
+ */
+ FuncExpr *newexpr = (FuncExpr *) copyObject(newe);
+
+ assign_expr_collations(pstate, (Node *) newexpr);
+
+ result = (Node *) evaluate_expr((Expr *) newexpr,
+ coerce_type,
+ typmod,
+ coerce_type_coll,
+ true);
+ if (result == NULL)
+ {
+ newe = ecopy;
+ *can_coerce = false;
+ }
+ }
+ }
}
else
newe = coerce_to_common_type(pstate, e,
@@ -2743,7 +2825,8 @@ transformTypeCast(ParseState *pstate, TypeCast *tc)
(A_ArrayExpr *) arg,
targetBaseType,
elementType,
- targetBaseTypmod);
+ targetBaseTypmod,
+ NULL);
}
else
expr = transformExprRecurse(pstate, arg);
@@ -2780,6 +2863,291 @@ transformTypeCast(ParseState *pstate, TypeCast *tc)
return result;
}
+/*
+ * Handle an explicit CAST(... DEFAULT ... ON CONVERSION ERROR) construct.
+ *
+ * Transform SafeTypeCast node, look up the type name, and apply any necessary
+ * coercion function(s).
+ */
+static Node *
+transformTypeSafeCast(ParseState *pstate, SafeTypeCast *tc)
+{
+ SafeTypeCastExpr *result;
+ TypeCast *tcast = (TypeCast *) tc->cast;
+ Node *source_expr;
+ Node *srcexpr;
+ Node *defexpr;
+ Node *cast_expr = NULL;
+ Oid inputType;
+ Oid targetType;
+ int32 targetTypmod;
+ Oid targetTypecoll;
+ Oid targetBaseType;
+ int32 targetBaseTypmod;
+ bool can_coerce = true;
+
+ /* Look up the type name first */
+ typenameTypeIdAndMod(pstate, tcast->typeName, &targetType, &targetTypmod);
+ targetBaseTypmod = targetTypmod;
+
+ targetTypecoll = get_typcollation(targetType);
+
+ targetBaseType = getBaseTypeAndTypmod(targetType, &targetBaseTypmod);
+
+ /* now looking at DEFAULT expression */
+ defexpr = transformExpr(pstate, tc->raw_default, EXPR_KIND_CAST_DEFAULT);
+
+ defexpr = coerce_to_target_type(pstate, defexpr, exprType(defexpr),
+ targetType, targetTypmod,
+ COERCION_EXPLICIT,
+ COERCE_EXPLICIT_CAST,
+ exprLocation(defexpr));
+ if (defexpr == NULL)
+ ereport(ERROR,
+ errcode(ERRCODE_CANNOT_COERCE),
+ errmsg("cannot coerce %s expression to type %s",
+ "CAST DEFAULT",
+ format_type_be(targetType)),
+ parser_coercion_errposition(pstate, exprLocation(tc->raw_default), defexpr));
+
+ assign_expr_collations(pstate, defexpr);
+
+ /*
+ * The collation of DEFAULT expression must match the collation of the
+ * target type.
+ */
+ if (OidIsValid(targetTypecoll))
+ {
+ Oid defColl = exprCollation(defexpr);
+
+ if (OidIsValid(defColl) && targetTypecoll != defColl)
+ ereport(ERROR,
+ errcode(ERRCODE_DATATYPE_MISMATCH),
+ errmsg("the collation of CAST DEFAULT expression conflicts with target type collation"),
+ errdetail("\"%s\" versus \"%s\"",
+ get_collation_name(targetTypecoll),
+ get_collation_name(defColl)),
+ parser_errposition(pstate, exprLocation(defexpr)));
+ }
+
+ /*
+ * If the type cast target type is an array type, we invoke
+ * transformArrayExpr() directly so that we can pass down the type
+ * information. This avoids some cases where transformArrayExpr() might not
+ * infer the correct type. Otherwise, just transform the argument normally.
+ */
+ if (IsA(tcast->arg, A_ArrayExpr))
+ {
+ Oid elementType;
+
+ /*
+ * If target is a domain over array, work with the base array type
+ * here. Below, we'll cast the array type to the domain. In the
+ * usual case that the target is not a domain, the remaining steps
+ * will be a no-op.
+ */
+ elementType = get_element_type(targetBaseType);
+
+ if (OidIsValid(elementType))
+ {
+ source_expr = transformArrayExpr(pstate,
+ (A_ArrayExpr *) tcast->arg,
+ targetBaseType,
+ elementType,
+ targetBaseTypmod,
+ &can_coerce);
+ }
+ else
+ source_expr = transformExprRecurse(pstate, tcast->arg);
+ }
+ else
+ source_expr = transformExprRecurse(pstate, tcast->arg);
+
+ /*
+ * Since we can't be certain that coerce_to_target_type_extended won't
+ * modify the source expression, we create a copy of it first. This ensures
+ * the transformed source expression is correctly passed to SafeTypeCastExpr
+ */
+ srcexpr = copyObject(source_expr);
+
+ inputType = exprType(source_expr);
+ if (inputType == InvalidOid)
+ return (Node *) NULL; /* return NULL if NULL input */
+
+ if (can_coerce)
+ {
+ ErrorSaveContext escontext = {T_ErrorSaveContext};
+
+ cast_expr = coerce_to_target_type_extended(pstate, source_expr, inputType,
+ targetType, targetTypmod,
+ COERCION_EXPLICIT,
+ COERCE_EXPLICIT_CAST,
+ tcast->location,
+ (Node *) &escontext);
+ if (cast_expr == NULL)
+ can_coerce = false;
+
+ CoercionErrorSafeCheck(pstate, cast_expr, source_expr, inputType,
+ targetType);
+ }
+
+ if (IsA(srcexpr, Const) && cast_expr && IsA(cast_expr, FuncExpr))
+ {
+ Node *result;
+
+ /*
+ * pre-evaluate simple constant cast expressions in a error safe way
+ *
+ * Rationale:
+ * 1. When deparsing safe cast expressions (or in other cases),
+ * eval_const_expressions might be invoked, but it cannot
+ * handle errors gracefully.
+ * 2. If the cast expression involves only simple constants, we
+ * can safely evaluate it ahead of time. If the evaluation
+ * fails, it indicates that such a cast is not possible, and
+ * we can then fall back to the CAST DEFAULT expression.
+ * 3. Even if FuncExpr (for castfunc) node has three arguments,
+ * the second and third arguments will also be constants per
+ * coerce_to_target_type. Evaluating a FuncExpr whose
+ * arguments are all Const is safe.
+ */
+ FuncExpr *newexpr = (FuncExpr *) copyObject(cast_expr);
+
+ assign_expr_collations(pstate, (Node *) newexpr);
+
+ result = (Node *) evaluate_expr((Expr *) newexpr,
+ targetType,
+ targetTypmod,
+ targetTypecoll,
+ true);
+ if (result == NULL)
+ {
+ /* can not coerce, set can_coerce to false */
+ can_coerce = false;
+ cast_expr = NULL;
+ }
+ }
+
+ Assert(can_coerce || cast_expr == NULL);
+
+ result = makeNode(SafeTypeCastExpr);
+ result->source_expr = srcexpr;
+ result->cast_expr = cast_expr;
+ result->default_expr = defexpr;
+ result->resulttype = targetType;
+ result->resulttypmod = targetTypmod;
+ result->resultcollid = targetTypecoll;
+ result->location = tcast->location;
+
+ return (Node *) result;
+}
+
+/*
+ * Check coercion is error safe or not. If not then report error
+ */
+static void
+CoercionErrorSafeCheck(ParseState *pstate, Node *castexpr, Node *sourceexpr, Oid inputType,
+ Oid targetType)
+{
+ HeapTuple tuple;
+ bool errorsafe = true;
+ bool userdefined = false;
+ Oid inputBaseType;
+ Oid targetBaseType;
+ Oid inputElementType;
+ Oid inputElementBaseType;
+ Oid targetElementType;
+ Oid targetElementBaseType;
+
+ /*
+ * Binary coercion cast is equivalent to no cast at all. CoerceViaIO can
+ * also be evaluated in an error-safe manner. So skip these two cases.
+ */
+ if (!castexpr || IsA(castexpr, RelabelType) ||
+ IsA(castexpr, CoerceViaIO))
+ return;
+
+ /*
+ * Type cast involving with some types is not error safe, do the check now.
+ * We need consider domain over array and array over domain scarenio. We
+ * already checked user-defined type cast above.
+ */
+ inputElementType = get_element_type(inputType);
+
+ if (OidIsValid(inputElementType))
+ inputElementBaseType = getBaseType(inputElementType);
+ else
+ {
+ inputBaseType = getBaseType(inputType);
+
+ inputElementBaseType = get_element_type(inputBaseType);
+ if (!OidIsValid(inputElementBaseType))
+ inputElementBaseType = inputBaseType;
+ }
+
+ targetElementType = get_element_type(targetType);
+
+ if (OidIsValid(targetElementType))
+ targetElementBaseType = getBaseType(targetElementType);
+ else
+ {
+ targetBaseType = getBaseType(targetType);
+
+ targetElementBaseType = get_element_type(targetBaseType);
+ if (!OidIsValid(targetElementBaseType))
+ targetElementBaseType = targetBaseType;
+ }
+
+ if (inputElementBaseType == MONEYOID ||
+ targetElementBaseType == MONEYOID ||
+ (inputElementBaseType == CIRCLEOID &&
+ targetElementBaseType == POLYGONOID))
+ {
+ /*
+ * Casts involving MONEY type are not error safe. The CIRCLE to POLYGON
+ * cast is also unsafe because it relies on a SQL-language function;
+ * only C-language functions are currently supported for error safe
+ * casts.
+ */
+ errorsafe = false;
+ }
+
+ if (errorsafe)
+ {
+ /* Look in pg_cast */
+ tuple = SearchSysCache2(CASTSOURCETARGET,
+ ObjectIdGetDatum(inputElementBaseType),
+ ObjectIdGetDatum(targetElementBaseType));
+
+ if (HeapTupleIsValid(tuple))
+ {
+ Form_pg_cast castForm = (Form_pg_cast) GETSTRUCT(tuple);
+
+ if (castForm->oid > FirstUnpinnedObjectId)
+ {
+ errorsafe = false;
+ userdefined = true;
+ }
+
+ ReleaseSysCache(tuple);
+ }
+ }
+
+ if (!errorsafe)
+ ereport(ERROR,
+ errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+ errmsg("cannot cast type %s to %s when %s expression is specified in %s",
+ format_type_be(inputType),
+ format_type_be(targetType),
+ "DEFAULT",
+ "CAST ... ON CONVERSION ERROR"),
+ userdefined
+ ? errhint("Safe type cast for user-defined types are not yet supported")
+ : errhint("Explicit cast is defined but definition is not error safe"),
+ parser_errposition(pstate, exprLocation(sourceexpr)));
+}
+
+
/*
* Handle an explicit COLLATE clause.
*
@@ -3193,6 +3561,8 @@ ParseExprKindName(ParseExprKind exprKind)
case EXPR_KIND_CHECK_CONSTRAINT:
case EXPR_KIND_DOMAIN_CHECK:
return "CHECK";
+ case EXPR_KIND_CAST_DEFAULT:
+ return "CAST DEFAULT";
case EXPR_KIND_COLUMN_DEFAULT:
case EXPR_KIND_FUNCTION_DEFAULT:
return "DEFAULT";
diff --git a/src/backend/parser/parse_func.c b/src/backend/parser/parse_func.c
index 778d69c6f3c..a90705b9847 100644
--- a/src/backend/parser/parse_func.c
+++ b/src/backend/parser/parse_func.c
@@ -2743,6 +2743,9 @@ check_srf_call_placement(ParseState *pstate, Node *last_srf, int location)
case EXPR_KIND_DOMAIN_CHECK:
err = _("set-returning functions are not allowed in check constraints");
break;
+ case EXPR_KIND_CAST_DEFAULT:
+ err = _("set-returning functions are not allowed in CAST DEFAULT expressions");
+ break;
case EXPR_KIND_COLUMN_DEFAULT:
case EXPR_KIND_FUNCTION_DEFAULT:
err = _("set-returning functions are not allowed in DEFAULT expressions");
diff --git a/src/backend/parser/parse_target.c b/src/backend/parser/parse_target.c
index 905c975d83b..dc03cf4ce74 100644
--- a/src/backend/parser/parse_target.c
+++ b/src/backend/parser/parse_target.c
@@ -1822,6 +1822,20 @@ FigureColnameInternal(Node *node, char **name)
}
}
break;
+ case T_SafeTypeCast:
+ strength = FigureColnameInternal(((SafeTypeCast *) node)->cast,
+ name);
+ if (strength <= 1)
+ {
+ TypeCast *node_cast;
+ node_cast = (TypeCast *)((SafeTypeCast *) node)->cast;
+ if (node_cast->typeName != NULL)
+ {
+ *name = strVal(llast(node_cast->typeName->names));
+ return 1;
+ }
+ }
+ break;
case T_CollateClause:
return FigureColnameInternal(((CollateClause *) node)->arg, name);
case T_GroupingFunc:
diff --git a/src/backend/parser/parse_type.c b/src/backend/parser/parse_type.c
index 9d7aa6967da..f6825bb9870 100644
--- a/src/backend/parser/parse_type.c
+++ b/src/backend/parser/parse_type.c
@@ -19,6 +19,7 @@
#include "catalog/pg_type.h"
#include "lib/stringinfo.h"
#include "nodes/makefuncs.h"
+#include "nodes/miscnodes.h"
#include "parser/parse_type.h"
#include "parser/parser.h"
#include "utils/array.h"
@@ -660,6 +661,19 @@ stringTypeDatum(Type tp, char *string, int32 atttypmod)
return OidInputFunctionCall(typinput, string, typioparam, atttypmod);
}
+/* error-safe version of stringTypeDatum */
+bool
+stringTypeDatumSafe(Type tp, char *string, int32 atttypmod,
+ Node *escontext, Datum *result)
+{
+ Form_pg_type typform = (Form_pg_type) GETSTRUCT(tp);
+ Oid typinput = typform->typinput;
+ Oid typioparam = getTypeIOParam(tp);
+
+ return OidInputFunctionCallSafe(typinput, string, typioparam, atttypmod,
+ escontext, result);
+}
+
/*
* Given a typeid, return the type's typrelid (associated relation), if any.
* Returns InvalidOid if type is not a composite type.
diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index e96b38a59d5..6df0b975a88 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -4630,7 +4630,7 @@ transformPartitionBoundValue(ParseState *pstate, Node *val,
assign_expr_collations(pstate, value);
value = (Node *) expression_planner((Expr *) value);
value = (Node *) evaluate_expr((Expr *) value, colType, colTypmod,
- partCollation);
+ partCollation, false);
if (!IsA(value, Const))
elog(ERROR, "could not evaluate partition bound expression");
}
diff --git a/src/backend/utils/adt/arrayfuncs.c b/src/backend/utils/adt/arrayfuncs.c
index b67ce57656a..c1027c5157d 100644
--- a/src/backend/utils/adt/arrayfuncs.c
+++ b/src/backend/utils/adt/arrayfuncs.c
@@ -3289,6 +3289,14 @@ array_map(Datum arrayd,
/* Apply the given expression to source element */
values[i] = ExecEvalExpr(exprstate, econtext, &nulls[i]);
+ /* Exit early if the evaluation fails */
+ if (SOFT_ERROR_OCCURRED(exprstate->escontext))
+ {
+ pfree(values);
+ pfree(nulls);
+ return (Datum) 0;
+ }
+
if (nulls[i])
hasnulls = true;
else
diff --git a/src/backend/utils/adt/ruleutils.c b/src/backend/utils/adt/ruleutils.c
index 9f85eb86da1..17049f05cfc 100644
--- a/src/backend/utils/adt/ruleutils.c
+++ b/src/backend/utils/adt/ruleutils.c
@@ -10562,6 +10562,27 @@ get_rule_expr(Node *node, deparse_context *context,
}
break;
+ case T_SafeTypeCastExpr:
+ {
+ SafeTypeCastExpr *stcexpr = castNode(SafeTypeCastExpr, node);
+
+ /*
+ * Here, we cannot deparsing cast_expr directly, since
+ * transformTypeSafeCast may have folded it into a simple
+ * constant or NULL. Instead, we use source_expr and
+ * default_expr to reconstruct the CAST DEFAULT clause.
+ */
+ appendStringInfoString(buf, "CAST(");
+ get_rule_expr(stcexpr->source_expr, context, showimplicit);
+
+ appendStringInfo(buf, " AS %s ",
+ format_type_with_typemod(stcexpr->resulttype,
+ stcexpr->resulttypmod));
+ appendStringInfoString(buf, "DEFAULT ");
+ get_rule_expr(stcexpr->default_expr, context, showimplicit);
+ appendStringInfoString(buf, " ON CONVERSION ERROR)");
+ }
+ break;
case T_JsonExpr:
{
JsonExpr *jexpr = (JsonExpr *) node;
diff --git a/src/backend/utils/fmgr/fmgr.c b/src/backend/utils/fmgr/fmgr.c
index 0fe63c6bb83..c9e5d0de8ed 100644
--- a/src/backend/utils/fmgr/fmgr.c
+++ b/src/backend/utils/fmgr/fmgr.c
@@ -1759,6 +1759,20 @@ OidInputFunctionCall(Oid functionId, char *str, Oid typioparam, int32 typmod)
return InputFunctionCall(&flinfo, str, typioparam, typmod);
}
+/* error-safe version of OidInputFunctionCall */
+bool
+OidInputFunctionCallSafe(Oid functionId, char *str, Oid typioparam,
+ int32 typmod, Node *escontext,
+ Datum *result)
+{
+ FmgrInfo flinfo;
+
+ fmgr_info(functionId, &flinfo);
+
+ return InputFunctionCallSafe(&flinfo, str, typioparam, typmod,
+ escontext, result);
+}
+
char *
OidOutputFunctionCall(Oid functionId, Datum val)
{
diff --git a/src/include/executor/execExpr.h b/src/include/executor/execExpr.h
index 75366203706..937cbf3bc9b 100644
--- a/src/include/executor/execExpr.h
+++ b/src/include/executor/execExpr.h
@@ -265,6 +265,7 @@ typedef enum ExprEvalOp
EEOP_XMLEXPR,
EEOP_JSON_CONSTRUCTOR,
EEOP_IS_JSON,
+ EEOP_SAFETYPE_CAST,
EEOP_JSONEXPR_PATH,
EEOP_JSONEXPR_COERCION,
EEOP_JSONEXPR_COERCION_FINISH,
@@ -750,6 +751,12 @@ typedef struct ExprEvalStep
JsonIsPredicate *pred; /* original expression node */
} is_json;
+ /* for EEOP_SAFETYPE_CAST */
+ struct
+ {
+ struct SafeTypeCastState *stcstate;
+ } stcexpr;
+
/* for EEOP_JSONEXPR_PATH */
struct
{
diff --git a/src/include/executor/executor.h b/src/include/executor/executor.h
index 7cd6a49309f..3e8ba551e73 100644
--- a/src/include/executor/executor.h
+++ b/src/include/executor/executor.h
@@ -324,6 +324,7 @@ ExecProcNode(PlanState *node)
* prototypes from functions in execExpr.c
*/
extern ExprState *ExecInitExpr(Expr *node, PlanState *parent);
+extern ExprState *ExecInitExprSafe(Expr *node, PlanState *parent);
extern ExprState *ExecInitExprWithParams(Expr *node, ParamListInfo ext_params);
extern ExprState *ExecInitQual(List *qual, PlanState *parent);
extern ExprState *ExecInitCheck(List *qual, PlanState *parent);
diff --git a/src/include/fmgr.h b/src/include/fmgr.h
index c0dbe85ed1c..a9357b98d70 100644
--- a/src/include/fmgr.h
+++ b/src/include/fmgr.h
@@ -750,6 +750,9 @@ extern bool DirectInputFunctionCallSafe(PGFunction func, char *str,
Datum *result);
extern Datum OidInputFunctionCall(Oid functionId, char *str,
Oid typioparam, int32 typmod);
+extern bool OidInputFunctionCallSafe(Oid functionId, char *str, Oid typioparam,
+ int32 typmod, Node *escontext,
+ Datum *result);
extern char *OutputFunctionCall(FmgrInfo *flinfo, Datum val);
extern char *OidOutputFunctionCall(Oid functionId, Datum val);
extern Datum ReceiveFunctionCall(FmgrInfo *flinfo, StringInfo buf,
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h
index 64ff6996431..9018e190cc7 100644
--- a/src/include/nodes/execnodes.h
+++ b/src/include/nodes/execnodes.h
@@ -1059,6 +1059,27 @@ typedef struct DomainConstraintState
ExprState *check_exprstate; /* check_expr's eval state, or NULL */
} DomainConstraintState;
+typedef struct SafeTypeCastState
+{
+ SafeTypeCastExpr *stcexpr;
+
+ /*
+ * Address to jump to when skipping all the steps to evaulate the default
+ * expression.
+ */
+ int jump_end;
+
+ /*
+ * For error-safe evaluation of coercions. A pointer to this is passed to
+ * ExecInitExprRec() when initializing the coercion expressions, see
+ * ExecInitSafeTypeCastExpr.
+ *
+ * Reset for each evaluation of EEOP_SAFETYPE_CAST.
+ */
+ ErrorSaveContext escontext;
+
+} SafeTypeCastState;
+
/*
* State for JsonExpr evaluation, too big to inline.
*
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h
index d14294a4ece..82b0fb83b4b 100644
--- a/src/include/nodes/parsenodes.h
+++ b/src/include/nodes/parsenodes.h
@@ -400,6 +400,17 @@ typedef struct TypeCast
ParseLoc location; /* token location, or -1 if unknown */
} TypeCast;
+/*
+ * SafeTypeCast - a CAST(source_expr AS target_type) DEFAULT ON CONVERSION ERROR
+ * construct
+ */
+typedef struct SafeTypeCast
+{
+ NodeTag type;
+ Node *cast; /* TypeCast expression */
+ Node *raw_default; /* untransformed DEFAULT expression */
+} SafeTypeCast;
+
/*
* CollateClause - a COLLATE expression
*/
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h
index 1b4436f2ff6..1401109fb3c 100644
--- a/src/include/nodes/primnodes.h
+++ b/src/include/nodes/primnodes.h
@@ -769,6 +769,42 @@ typedef enum CoercionForm
COERCE_SQL_SYNTAX, /* display with SQL-mandated special syntax */
} CoercionForm;
+/*
+ * SafeTypeCastExpr -
+ * Transformed representation of
+ * CAST(expr AS typename DEFAULT expr2 ON ERROR)
+ * CAST(expr AS typename NULL ON ERROR)
+ */
+typedef struct SafeTypeCastExpr
+{
+ Expr xpr;
+
+ /* transformed source expression */
+ Node *source_expr;
+
+ /*
+ * The transformed cast expression; NULL if we can not cocerce source
+ * expression to the target type
+ */
+ Node *cast_expr pg_node_attr(query_jumble_ignore);
+
+ /* Fall back to the default expression if cast evaluation fails */
+ Node *default_expr;
+
+ /* cast result data type */
+ Oid resulttype;
+
+ /* cast result data type typmod (usually -1) */
+ int32 resulttypmod;
+
+ /* cast result data type collation */
+ Oid resultcollid;
+
+ /* Original SafeTypeCastExpr's location */
+ ParseLoc location;
+
+} SafeTypeCastExpr;
+
/*
* FuncExpr - expression node for a function call
*
diff --git a/src/include/optimizer/optimizer.h b/src/include/optimizer/optimizer.h
index 44ec5296a18..587e711596a 100644
--- a/src/include/optimizer/optimizer.h
+++ b/src/include/optimizer/optimizer.h
@@ -143,7 +143,7 @@ extern void convert_saop_to_hashed_saop(Node *node);
extern Node *estimate_expression_value(PlannerInfo *root, Node *node);
extern Expr *evaluate_expr(Expr *expr, Oid result_type, int32 result_typmod,
- Oid result_collation);
+ Oid result_collation, bool error_safe);
extern bool var_is_nonnullable(PlannerInfo *root, Var *var, bool use_rel_info);
diff --git a/src/include/parser/parse_coerce.h b/src/include/parser/parse_coerce.h
index 8d775c72c59..1eca1ce727d 100644
--- a/src/include/parser/parse_coerce.h
+++ b/src/include/parser/parse_coerce.h
@@ -43,11 +43,26 @@ extern Node *coerce_to_target_type(ParseState *pstate,
CoercionContext ccontext,
CoercionForm cformat,
int location);
+extern Node *coerce_to_target_type_extended(ParseState *pstate,
+ Node *expr,
+ Oid exprtype,
+ Oid targettype,
+ int32 targettypmod,
+ CoercionContext ccontext,
+ CoercionForm cformat,
+ int location,
+ Node *escontext);
extern bool can_coerce_type(int nargs, const Oid *input_typeids, const Oid *target_typeids,
CoercionContext ccontext);
extern Node *coerce_type(ParseState *pstate, Node *node,
Oid inputTypeId, Oid targetTypeId, int32 targetTypeMod,
CoercionContext ccontext, CoercionForm cformat, int location);
+extern Node *coerce_type_extend(ParseState *pstate, Node *node,
+ Oid inputTypeId,
+ Oid targetTypeId, int32 targetTypeMod,
+ CoercionContext ccontext, CoercionForm cformat,
+ int location,
+ Node *escontext);
extern Node *coerce_to_domain(Node *arg, Oid baseTypeId, int32 baseTypeMod,
Oid typeId,
CoercionContext ccontext, CoercionForm cformat, int location,
diff --git a/src/include/parser/parse_node.h b/src/include/parser/parse_node.h
index f7d07c84542..9f5b32e0360 100644
--- a/src/include/parser/parse_node.h
+++ b/src/include/parser/parse_node.h
@@ -67,6 +67,8 @@ typedef enum ParseExprKind
EXPR_KIND_VALUES_SINGLE, /* single-row VALUES (in INSERT only) */
EXPR_KIND_CHECK_CONSTRAINT, /* CHECK constraint for a table */
EXPR_KIND_DOMAIN_CHECK, /* CHECK constraint for a domain */
+ EXPR_KIND_CAST_DEFAULT, /* default expression in
+ CAST DEFAULT ON CONVERSION ERROR */
EXPR_KIND_COLUMN_DEFAULT, /* default value for a table column */
EXPR_KIND_FUNCTION_DEFAULT, /* default parameter value for function */
EXPR_KIND_INDEX_EXPRESSION, /* index expression */
diff --git a/src/include/parser/parse_type.h b/src/include/parser/parse_type.h
index 0d919d8bfa2..40aca2b31c9 100644
--- a/src/include/parser/parse_type.h
+++ b/src/include/parser/parse_type.h
@@ -47,6 +47,8 @@ extern char *typeTypeName(Type t);
extern Oid typeTypeRelid(Type typ);
extern Oid typeTypeCollation(Type typ);
extern Datum stringTypeDatum(Type tp, char *string, int32 atttypmod);
+extern bool stringTypeDatumSafe(Type tp, char *string, int32 atttypmod,
+ Node *escontext, Datum *result);
extern Oid typeidTypeRelid(Oid type_id);
extern Oid typeOrDomainTypeRelid(Oid type_id);
diff --git a/src/test/regress/expected/cast.out b/src/test/regress/expected/cast.out
new file mode 100644
index 00000000000..b0dc7b8faea
--- /dev/null
+++ b/src/test/regress/expected/cast.out
@@ -0,0 +1,810 @@
+SET extra_float_digits = 0;
+-- CAST DEFAULT ON CONVERSION ERROR
+SELECT CAST(B'01' AS date DEFAULT NULL ON CONVERSION ERROR);
+ date
+------
+
+(1 row)
+
+SELECT CAST(BIT'01' AS date DEFAULT NULL ON CONVERSION ERROR);
+ date
+------
+
+(1 row)
+
+SELECT CAST(TRUE AS date DEFAULT NULL ON CONVERSION ERROR);
+ date
+------
+
+(1 row)
+
+SELECT CAST(1.1 AS date DEFAULT NULL ON CONVERSION ERROR);
+ date
+------
+
+(1 row)
+
+SELECT CAST(1 AS date DEFAULT NULL ON CONVERSION ERROR);
+ date
+------
+
+(1 row)
+
+SELECT CAST(1111 AS "char" DEFAULT 'A' ON CONVERSION ERROR);
+ char
+------
+ A
+(1 row)
+
+--test source expression is a unknown const
+VALUES (CAST('error' AS integer ERROR ON CONVERSION ERROR)); --error
+ERROR: invalid input syntax for type integer: "error"
+LINE 1: VALUES (CAST('error' AS integer ERROR ON CONVERSION ERROR));
+ ^
+VALUES (CAST('error' AS integer NULL ON CONVERSION ERROR));
+ column1
+---------
+
+(1 row)
+
+VALUES (CAST('error' AS integer DEFAULT 42 ON CONVERSION ERROR));
+ column1
+---------
+ 42
+(1 row)
+
+SELECT CAST('a' as int DEFAULT 18 ON CONVERSION ERROR);
+ int4
+------
+ 18
+(1 row)
+
+SELECT CAST('a' as int DEFAULT sum(1) ON CONVERSION ERROR); --error
+ERROR: aggregate functions are not allowed in CAST DEFAULT expressions
+LINE 1: SELECT CAST('a' as int DEFAULT sum(1) ON CONVERSION ERROR);
+ ^
+SELECT CAST('a' as int DEFAULT sum(1) over() ON CONVERSION ERROR); --error
+ERROR: window functions are not allowed in CAST DEFAULT expressions
+LINE 1: SELECT CAST('a' as int DEFAULT sum(1) over() ON CONVERSION E...
+ ^
+SELECT CAST('a' as int DEFAULT (SELECT NULL) ON CONVERSION ERROR); --error
+ERROR: cannot use subquery in CAST DEFAULT expression
+LINE 1: SELECT CAST('a' as int DEFAULT (SELECT NULL) ON CONVERSION E...
+ ^
+SELECT CAST('a' as int DEFAULT 'b' ON CONVERSION ERROR); --error
+ERROR: invalid input syntax for type integer: "b"
+LINE 1: SELECT CAST('a' as int DEFAULT 'b' ON CONVERSION ERROR);
+ ^
+SELECT CAST('a'::int as int DEFAULT NULL ON CONVERSION ERROR); --error
+ERROR: invalid input syntax for type integer: "a"
+LINE 1: SELECT CAST('a'::int as int DEFAULT NULL ON CONVERSION ERROR...
+ ^
+--the default expression’s collation should match the collation of the cast
+--target type
+VALUES (CAST('error' AS text DEFAULT '1' COLLATE "C" ON CONVERSION ERROR));
+ERROR: the collation of CAST DEFAULT expression conflicts with target type collation
+LINE 1: VALUES (CAST('error' AS text DEFAULT '1' COLLATE "C" ON CONV...
+ ^
+DETAIL: "default" versus "C"
+VALUES (CAST('error' AS int2vector DEFAULT '1 3' ON CONVERSION ERROR));
+ column1
+---------
+ 1 3
+(1 row)
+
+VALUES (CAST('error' AS int2vector[] DEFAULT '{1 3}' ON CONVERSION ERROR));
+ column1
+---------
+ {"1 3"}
+(1 row)
+
+-- test source expression contain subquery
+SELECT CAST((SELECT b FROM generate_series(1, 1), (VALUES('H')) s(b))
+ AS int2vector[] DEFAULT '{1 3}' ON CONVERSION ERROR);
+ b
+---------
+ {"1 3"}
+(1 row)
+
+SELECT CAST((SELECT ARRAY((SELECT b FROM generate_series(1, 2) g, (VALUES('H')) s(b))))
+ AS INT[]
+ DEFAULT NULL ON CONVERSION ERROR);
+ array
+-------
+
+(1 row)
+
+CREATE FUNCTION ret_int8() RETURNS BIGINT AS
+$$
+BEGIN RETURN 2147483648; END;
+$$
+LANGUAGE plpgsql IMMUTABLE;
+SELECT CAST('a' as int DEFAULT ret_int8() ON CONVERSION ERROR); --error
+ERROR: integer out of range
+SELECT CAST('a' as date DEFAULT ret_int8() ON CONVERSION ERROR); --error
+ERROR: cannot coerce CAST DEFAULT expression to type date
+LINE 1: SELECT CAST('a' as date DEFAULT ret_int8() ON CONVERSION ERR...
+ ^
+-- DEFAULT expression can not be set-returning
+CREATE FUNCTION ret_setint() RETURNS SETOF integer AS
+$$
+BEGIN RETURN QUERY EXECUTE 'select 1 union all select 1'; END;
+$$
+LANGUAGE plpgsql IMMUTABLE;
+CREATE TABLE tcast(a text[], b int GENERATED BY DEFAULT AS IDENTITY);
+INSERT INTO tcast VALUES ('{12}'), ('{1,a, b}'), ('{{1,2}, {c,d}}'), ('{13}');
+SELECT CAST('a' as int DEFAULT ret_setint() ON CONVERSION ERROR) FROM tcast; --error
+ERROR: set-returning functions are not allowed in CAST DEFAULT expressions
+LINE 1: SELECT CAST('a' as int DEFAULT ret_setint() ON CONVERSION ER...
+ ^
+SELECT CAST(t AS text[] DEFAULT '{21,22, ' || b || '}' ON CONVERSION ERROR) FROM tcast as t;
+ t
+-----------
+ {21,22,1}
+ {21,22,2}
+ {21,22,3}
+ {21,22,4}
+(4 rows)
+
+SELECT CAST(t.a AS int[] DEFAULT '{21,22}'::int[] || b ON CONVERSION ERROR) FROM tcast as t;
+ a
+-----------
+ {12}
+ {21,22,2}
+ {21,22,3}
+ {13}
+(4 rows)
+
+-- test with user-defined type, domain, array over domain, domain over array
+CREATE DOMAIN d_int42 as int check (value = 42) NOT NULL;
+CREATE DOMAIN d_char3_not_null as char(3) NOT NULL;
+CREATE DOMAIN d_varchar as varchar(3) NOT NULL;
+CREATE DOMAIN d_int_arr as int[] check (value = '{41, 43}') NOT NULL;
+CREATE TYPE comp_domain_with_typmod AS (a d_char3_not_null, b int);
+CREATE TYPE comp2 AS (a d_varchar);
+SELECT CAST('(NULL)' AS comp2 DEFAULT '(1232)' ON CONVERSION ERROR); --error
+ERROR: value too long for type character varying(3)
+LINE 1: SELECT CAST('(NULL)' AS comp2 DEFAULT '(1232)' ON CONVERSION...
+ ^
+SELECT CAST('(NULL)' AS comp2 DEFAULT '(123)' ON CONVERSION ERROR);
+ comp2
+-------
+ (123)
+(1 row)
+
+SELECT CAST(11 AS d_int42 DEFAULT 41 ON CONVERSION ERROR); --error
+ERROR: value for domain d_int42 violates check constraint "d_int42_check"
+SELECT CAST(11 AS d_int42 DEFAULT 42 ON CONVERSION ERROR);
+ d_int42
+---------
+ 42
+(1 row)
+
+SELECT CAST(NULL AS d_int42 DEFAULT NULL ON CONVERSION ERROR); --error
+ERROR: domain d_int42 does not allow null values
+SELECT CAST(NULL AS d_int42 DEFAULT 42 ON CONVERSION ERROR);
+ d_int42
+---------
+ 42
+(1 row)
+
+SELECT CAST('(,42)' AS comp_domain_with_typmod DEFAULT NULL ON CONVERSION ERROR);
+ comp_domain_with_typmod
+-------------------------
+
+(1 row)
+
+SELECT CAST('(NULL,42)' AS comp_domain_with_typmod DEFAULT '(1,2)' ON CONVERSION ERROR);
+ comp_domain_with_typmod
+-------------------------
+ ("1 ",2)
+(1 row)
+
+SELECT CAST('(NULL,42)' AS comp_domain_with_typmod DEFAULT '(1234,2)' ON CONVERSION ERROR); --error
+ERROR: value too long for type character(3)
+LINE 1: ...ST('(NULL,42)' AS comp_domain_with_typmod DEFAULT '(1234,2)'...
+ ^
+SELECT CAST(ARRAY[42,41] AS d_int42[] DEFAULT '{42, 42}' ON CONVERSION ERROR);
+ array
+---------
+ {42,42}
+(1 row)
+
+SELECT CAST(ARRAY[42,41] AS d_int_arr DEFAULT '{41, 43}' ON CONVERSION ERROR);
+ array
+---------
+ {41,43}
+(1 row)
+
+-- test array coerce
+SELECT CAST(array['a'::text] AS int[] DEFAULT NULL ON CONVERSION ERROR); --error
+ERROR: invalid input syntax for type integer: "a"
+SELECT CAST(array['a'] AS int[] DEFAULT ARRAY[1] ON CONVERSION ERROR);
+ array
+-------
+ {1}
+(1 row)
+
+SELECT CAST(array[11.12] AS date[] DEFAULT NULL ON CONVERSION ERROR);
+ array
+-------
+
+(1 row)
+
+SELECT CAST(array[11111111111111111] AS int[] DEFAULT NULL ON CONVERSION ERROR);
+ array
+-------
+
+(1 row)
+
+SELECT CAST(array[['abc'],[456]] AS int[] DEFAULT NULL ON CONVERSION ERROR);
+ array
+-------
+
+(1 row)
+
+SELECT CAST('{123,abc,456}' AS int[] DEFAULT '{-789}' ON CONVERSION ERROR);
+ int4
+--------
+ {-789}
+(1 row)
+
+SELECT CAST('{234,def,567}'::text[] AS integer[] DEFAULT '{-1011}' ON CONVERSION ERROR);
+ int4
+---------
+ {-1011}
+(1 row)
+
+SELECT CAST(ARRAY[['1'], ['three'],['a']] AS int[] DEFAULT '{1,2}' ON CONVERSION ERROR);
+ array
+-------
+ {1,2}
+(1 row)
+
+SELECT CAST(ARRAY[['1', '2'], ['three', 'a']] AS int[] DEFAULT '{21,22}' ON CONVERSION ERROR); --ok
+ array
+---------
+ {21,22}
+(1 row)
+
+SELECT CAST(ARRAY[['1', '2'], ['three'::int, 'a']] AS int[] DEFAULT '{21,22}' ON CONVERSION ERROR); --error
+ERROR: invalid input syntax for type integer: "three"
+LINE 1: SELECT CAST(ARRAY[['1', '2'], ['three'::int, 'a']] AS int[] ...
+ ^
+SELECT CAST(ARRAY[1, 'three'::int] AS int[] DEFAULT '{21,22}' ON CONVERSION ERROR); --error
+ERROR: invalid input syntax for type integer: "three"
+LINE 1: SELECT CAST(ARRAY[1, 'three'::int] AS int[] DEFAULT '{21,22}...
+ ^
+-----safe cast with geometry data type
+SELECT CAST('(1,2)'::point AS box DEFAULT NULL ON CONVERSION ERROR);
+ box
+-------------
+ (1,2),(1,2)
+(1 row)
+
+SELECT CAST('[(NaN,1),(NaN,infinity)]'::lseg AS point DEFAULT NULL ON CONVERSION ERROR);
+ point
+----------------
+ (NaN,Infinity)
+(1 row)
+
+SELECT CAST('[(1e+300,Infinity),(1e+300,Infinity)]'::lseg AS point DEFAULT NULL ON CONVERSION ERROR);
+ point
+-------------------
+ (1e+300,Infinity)
+(1 row)
+
+SELECT CAST('[(1,2),(3,4)]'::path as polygon DEFAULT NULL ON CONVERSION ERROR);
+ polygon
+---------
+
+(1 row)
+
+SELECT CAST('(NaN,1.0,NaN,infinity)'::box AS point DEFAULT NULL ON CONVERSION ERROR);
+ point
+----------------
+ (NaN,Infinity)
+(1 row)
+
+SELECT CAST('(2.0,2.0,0.0,0.0)'::box AS lseg DEFAULT NULL ON CONVERSION ERROR);
+ lseg
+---------------
+ [(2,2),(0,0)]
+(1 row)
+
+SELECT CAST('(2.0,2.0,0.0,0.0)'::box AS polygon DEFAULT NULL ON CONVERSION ERROR);
+ polygon
+---------------------------
+ ((0,0),(0,2),(2,2),(2,0))
+(1 row)
+
+SELECT CAST('(2.0,2.0,0.0,0.0)'::box AS path DEFAULT NULL ON CONVERSION ERROR);
+ path
+------
+
+(1 row)
+
+SELECT CAST('(2.0,infinity,NaN,infinity)'::box AS circle DEFAULT NULL ON CONVERSION ERROR);
+ circle
+----------------------
+ <(NaN,Infinity),NaN>
+(1 row)
+
+SELECT CAST('(NaN,0.0),(2.0,4.0),(0.0,infinity)'::polygon AS point DEFAULT NULL ON CONVERSION ERROR);
+ point
+----------------
+ (NaN,Infinity)
+(1 row)
+
+SELECT CAST('(2.0,0.0),(2.0,4.0),(0.0,0.0)'::polygon AS path DEFAULT NULL ON CONVERSION ERROR);
+ path
+---------------------
+ ((2,0),(2,4),(0,0))
+(1 row)
+
+SELECT CAST('(2.0,0.0),(2.0,4.0),(0.0,0.0)'::polygon AS box DEFAULT NULL ON CONVERSION ERROR);
+ box
+-------------
+ (2,4),(0,0)
+(1 row)
+
+SELECT CAST('(NaN,infinity),(2.0,4.0),(0.0,infinity)'::polygon AS circle DEFAULT NULL ON CONVERSION ERROR);
+ circle
+----------------------
+ <(NaN,Infinity),NaN>
+(1 row)
+
+SELECT CAST('<(5,1),3>'::circle AS point DEFAULT NULL ON CONVERSION ERROR);
+ point
+-------
+ (5,1)
+(1 row)
+
+SELECT CAST('<(3,5),0>'::circle as box DEFAULT NULL ON CONVERSION ERROR);
+ box
+-------------
+ (3,5),(3,5)
+(1 row)
+
+-- not supported because the cast from circle to polygon is implemented as a SQL
+-- function, which cannot be error-safe.
+SELECT CAST('<(3,5),0>'::circle as polygon DEFAULT NULL ON CONVERSION ERROR);
+ERROR: cannot cast type circle to polygon when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST('<(3,5),0>'::circle as polygon DEFAULT NULL ON C...
+ ^
+HINT: Explicit cast is defined but definition is not error safe
+-----safe cast from/to money type is not supported, all the following would result error
+SELECT CAST(NULL::int8 AS money DEFAULT NULL ON CONVERSION ERROR);
+ERROR: cannot cast type bigint to money when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST(NULL::int8 AS money DEFAULT NULL ON CONVERSION E...
+ ^
+HINT: Explicit cast is defined but definition is not error safe
+SELECT CAST(NULL::int4 AS money DEFAULT NULL ON CONVERSION ERROR);
+ERROR: cannot cast type integer to money when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST(NULL::int4 AS money DEFAULT NULL ON CONVERSION E...
+ ^
+HINT: Explicit cast is defined but definition is not error safe
+SELECT CAST(NULL::numeric AS money DEFAULT NULL ON CONVERSION ERROR);
+ERROR: cannot cast type numeric to money when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST(NULL::numeric AS money DEFAULT NULL ON CONVERSIO...
+ ^
+HINT: Explicit cast is defined but definition is not error safe
+SELECT CAST(NULL::money AS numeric DEFAULT NULL ON CONVERSION ERROR);
+ERROR: cannot cast type money to numeric when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST(NULL::money AS numeric DEFAULT NULL ON CONVERSIO...
+ ^
+HINT: Explicit cast is defined but definition is not error safe
+SELECT CAST(NULL::money[] AS numeric[] DEFAULT NULL ON CONVERSION ERROR);
+ERROR: cannot cast type money[] to numeric[] when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST(NULL::money[] AS numeric[] DEFAULT NULL ON CONVE...
+ ^
+HINT: Explicit cast is defined but definition is not error safe
+-----safe cast from bytea type to other data types
+SELECT CAST ('\x112233445566778899'::bytea AS int8 DEFAULT 19 ON CONVERSION ERROR);
+ int8
+------
+ 19
+(1 row)
+
+SELECT CAST('\x123456789A'::bytea AS int4 DEFAULT 20 ON CONVERSION ERROR);
+ int4
+------
+ 20
+(1 row)
+
+SELECT CAST('\x123456'::bytea AS int2 DEFAULT 21 ON CONVERSION ERROR);
+ int2
+------
+ 21
+(1 row)
+
+-----safe cast from bit type to other data types
+SELECT CAST('111111111100001'::bit(100) AS INT DEFAULT 22 ON CONVERSION ERROR);
+ int4
+------
+ 22
+(1 row)
+
+SELECT CAST ('111111111100001'::bit(100) AS INT8 DEFAULT 23 ON CONVERSION ERROR);
+ int8
+------
+ 23
+(1 row)
+
+-----safe cast from text type to other data types
+select CAST('a.b.c.d'::text as regclass default NULL on conversion error);
+ regclass
+----------
+
+(1 row)
+
+CREATE TABLE test_safecast(col0 text);
+INSERT INTO test_safecast(col0) VALUES ('<value>one</value');
+SELECT col0 as text,
+ CAST(col0 AS regclass DEFAULT NULL ON CONVERSION ERROR) as to_regclass,
+ CAST(col0 AS regclass DEFAULT NULL ON CONVERSION ERROR) IS NULL as expect_true,
+ CAST(col0 AS "char" DEFAULT NULL ON CONVERSION ERROR) as to_char,
+ CAST(col0 AS name DEFAULT NULL ON CONVERSION ERROR) as to_name,
+ CAST(col0 AS xml DEFAULT NULL ON CONVERSION ERROR) as to_xml
+FROM test_safecast;
+ text | to_regclass | expect_true | to_char | to_name | to_xml
+-------------------+-------------+-------------+---------+-------------------+--------
+ <value>one</value | | t | < | <value>one</value |
+(1 row)
+
+SELECT CAST('192.168.1.x' as inet DEFAULT NULL ON CONVERSION ERROR);
+ inet
+------
+
+(1 row)
+
+SELECT CAST('192.168.1.2/30' as cidr DEFAULT NULL ON CONVERSION ERROR);
+ cidr
+------
+
+(1 row)
+
+SELECT CAST('22:00:5c:08:55:08:01:02'::macaddr8 as macaddr DEFAULT NULL ON CONVERSION ERROR);
+ macaddr
+---------
+
+(1 row)
+
+-----safe cast betweeen range data types
+SELECT CAST('[1,2]'::int4range AS int4multirange DEFAULT NULL ON CONVERSION ERROR);
+ int4multirange
+----------------
+ {[1,3)}
+(1 row)
+
+SELECT CAST('[1,2]'::int8range AS int8multirange DEFAULT NULL ON CONVERSION ERROR);
+ int8multirange
+----------------
+ {[1,3)}
+(1 row)
+
+SELECT CAST('[1,2]'::numrange AS nummultirange DEFAULT NULL ON CONVERSION ERROR);
+ nummultirange
+---------------
+ {[1,2]}
+(1 row)
+
+SELECT CAST('[-infinity,infinity]'::daterange AS datemultirange DEFAULT NULL ON CONVERSION ERROR);
+ datemultirange
+------------------------
+ {[-infinity,infinity]}
+(1 row)
+
+SELECT CAST('[-infinity,infinity]'::tsrange AS tsmultirange DEFAULT NULL ON CONVERSION ERROR);
+ tsmultirange
+------------------------
+ {[-infinity,infinity]}
+(1 row)
+
+SELECT CAST('[-infinity,infinity]'::tstzrange AS tstzmultirange DEFAULT NULL ON CONVERSION ERROR);
+ tstzmultirange
+------------------------
+ {[-infinity,infinity]}
+(1 row)
+
+-----safe cast betweeen numeric data types
+CREATE TABLE test_safecast1(
+ col1 float4, col2 float8, col3 numeric, col4 numeric[],
+ col5 int2 default 32767,
+ col6 int4 default 32768,
+ col7 int8 default 4294967296);
+INSERT INTO test_safecast1 VALUES('11.1234', '11.1234', '9223372036854775808', '{11.1234}'::numeric[]);
+INSERT INTO test_safecast1 VALUES('inf', 'inf', 'inf', '{11.1234, 12, inf, NaN}'::numeric[]);
+INSERT INTO test_safecast1 VALUES('-inf', '-inf', '-inf', '{11.1234, 12, -inf, NaN}'::numeric[]);
+INSERT INTO test_safecast1 VALUES('NaN', 'NaN', 'NaN', '{11.1234, 12, -inf, NaN}'::numeric[]);
+SELECT col5 as int2,
+ CAST(col5 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col5 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col5 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col5 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col5 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col5 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col5 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col5 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+ int2 | to_int2 | to_int4 | to_oid | to_int8 | to_float4 | to_float8 | to_numeric | to_numeric_scale
+-------+---------+---------+--------+---------+-----------+-----------+------------+------------------
+ 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767.0
+ 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767.0
+ 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767.0
+ 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767 | 32767.0
+(4 rows)
+
+SELECT col6 as int4,
+ CAST(col6 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col6 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col6 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col6 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col6 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col6 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col6 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col6 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+ int4 | to_int2 | to_int4 | to_oid | to_int8 | to_float4 | to_float8 | to_numeric | to_numeric_scale
+-------+---------+---------+--------+---------+-----------+-----------+------------+------------------
+ 32768 | | 32768 | 32768 | 32768 | 32768 | 32768 | 32768 | 32768.0
+ 32768 | | 32768 | 32768 | 32768 | 32768 | 32768 | 32768 | 32768.0
+ 32768 | | 32768 | 32768 | 32768 | 32768 | 32768 | 32768 | 32768.0
+ 32768 | | 32768 | 32768 | 32768 | 32768 | 32768 | 32768 | 32768.0
+(4 rows)
+
+SELECT col7 as int8,
+ CAST(col7 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col7 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col7 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col7 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col7 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col7 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col7 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col7 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+ int8 | to_int2 | to_int4 | to_oid | to_int8 | to_float4 | to_float8 | to_numeric | to_numeric_scale
+------------+---------+---------+--------+------------+-------------+------------+------------+------------------
+ 4294967296 | | | | 4294967296 | 4.29497e+09 | 4294967296 | 4294967296 |
+ 4294967296 | | | | 4294967296 | 4.29497e+09 | 4294967296 | 4294967296 |
+ 4294967296 | | | | 4294967296 | 4.29497e+09 | 4294967296 | 4294967296 |
+ 4294967296 | | | | 4294967296 | 4.29497e+09 | 4294967296 | 4294967296 |
+(4 rows)
+
+SELECT col3 as numeric,
+ CAST(col3 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col3 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col3 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col3 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col3 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col3 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col3 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col3 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+ numeric | to_int2 | to_int4 | to_oid | to_int8 | to_float4 | to_float8 | to_numeric | to_numeric_scale
+---------------------+---------+---------+--------+---------+-------------+----------------------+---------------------+------------------
+ 9223372036854775808 | | | | | 9.22337e+18 | 9.22337203685478e+18 | 9223372036854775808 |
+ Infinity | | | | | Infinity | Infinity | Infinity |
+ -Infinity | | | | | -Infinity | -Infinity | -Infinity |
+ NaN | | | | | NaN | NaN | NaN | NaN
+(4 rows)
+
+SELECT col4 as num_arr,
+ CAST(col4 AS int2[] DEFAULT NULL ON CONVERSION ERROR) as int2arr,
+ CAST(col4 AS int4[] DEFAULT NULL ON CONVERSION ERROR) as int4arr,
+ CAST(col4 as int8[] DEFAULT NULL ON CONVERSION ERROR) as int8arr,
+ CAST(col4 as float4[] DEFAULT NULL ON CONVERSION ERROR) as f4arr,
+ CAST(col4 as float8[] DEFAULT NULL ON CONVERSION ERROR) as f8arr,
+ CAST(col4 as numeric(10,1)[] DEFAULT NULL ON CONVERSION ERROR) as numarr
+FROM test_safecast1;
+ num_arr | int2arr | int4arr | int8arr | f4arr | f8arr | numarr
+----------------------------+---------+---------+---------+----------------------------+----------------------------+--------
+ {11.1234} | {11} | {11} | {11} | {11.1234} | {11.1234} | {11.1}
+ {11.1234,12,Infinity,NaN} | | | | {11.1234,12,Infinity,NaN} | {11.1234,12,Infinity,NaN} |
+ {11.1234,12,-Infinity,NaN} | | | | {11.1234,12,-Infinity,NaN} | {11.1234,12,-Infinity,NaN} |
+ {11.1234,12,-Infinity,NaN} | | | | {11.1234,12,-Infinity,NaN} | {11.1234,12,-Infinity,NaN} |
+(4 rows)
+
+SELECT col1 as float4,
+ CAST(col1 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col1 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col1 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col1 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col1 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col1 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col1 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col1 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+ float4 | to_int2 | to_int4 | to_oid | to_int8 | to_float4 | to_float8 | to_numeric | to_numeric_scale
+-----------+---------+---------+--------+---------+-----------+------------------+------------+------------------
+ 11.1234 | 11 | 11 | | 11 | 11.1234 | 11.1233997344971 | 11.1234 | 11.1
+ Infinity | | | | | Infinity | Infinity | Infinity |
+ -Infinity | | | | | -Infinity | -Infinity | -Infinity |
+ NaN | | | | | NaN | NaN | NaN | NaN
+(4 rows)
+
+SELECT col2 as float8,
+ CAST(col2 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col2 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col2 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col2 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col2 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col2 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col2 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col2 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+ float8 | to_int2 | to_int4 | to_oid | to_int8 | to_float4 | to_float8 | to_numeric | to_numeric_scale
+-----------+---------+---------+--------+---------+-----------+-----------+------------+------------------
+ 11.1234 | 11 | 11 | | 11 | 11.1234 | 11.1234 | 11.1234 | 11.1
+ Infinity | | | | | Infinity | Infinity | Infinity |
+ -Infinity | | | | | -Infinity | -Infinity | -Infinity |
+ NaN | | | | | NaN | NaN | NaN | NaN
+(4 rows)
+
+-- date/timestamp/interval related safe type cast
+CREATE TABLE test_safecast2(
+ col0 date, col1 timestamp, col2 timestamptz,
+ col3 interval, col4 time, col5 timetz);
+INSERT INTO test_safecast2 VALUES
+('-infinity', '-infinity', '-infinity', '-infinity',
+ '2003-03-07 15:36:39 America/New_York', '2003-07-07 15:36:39 America/New_York'),
+('-infinity', 'infinity', 'infinity', 'infinity',
+ '11:59:59.99 PM', '11:59:59.99 PM PDT');
+SELECT col0 as date,
+ CAST(col0 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col0 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col0 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col0 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col0 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale
+FROM test_safecast2;
+ date | to_timestamptz | to_date | to_times | to_timetz | to_timestamp_scale
+-----------+----------------+-----------+----------+-----------+--------------------
+ -infinity | -infinity | -infinity | | | -infinity
+ -infinity | -infinity | -infinity | | | -infinity
+(2 rows)
+
+SELECT col1 as timestamp,
+ CAST(col1 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col1 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col1 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col1 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col1 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale
+FROM test_safecast2;
+ timestamp | to_timestamptz | to_date | to_times | to_timetz | to_timestamp_scale
+-----------+----------------+-----------+----------+-----------+--------------------
+ -infinity | -infinity | -infinity | | | -infinity
+ infinity | infinity | infinity | | | infinity
+(2 rows)
+
+SELECT col2 as timestamptz,
+ CAST(col2 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col2 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col2 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col2 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col2 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale
+FROM test_safecast2;
+ timestamptz | to_timestamptz | to_date | to_times | to_timetz | to_timestamp_scale
+-------------+----------------+-----------+----------+-----------+--------------------
+ -infinity | -infinity | -infinity | | | -infinity
+ infinity | infinity | infinity | | | infinity
+(2 rows)
+
+SELECT col3 as interval,
+ CAST(col3 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col3 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col3 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col3 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col3 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale,
+ CAST(col3 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval_scale
+FROM test_safecast2;
+ interval | to_timestamptz | to_date | to_times | to_timetz | to_timestamp_scale | to_interval_scale
+-----------+----------------+---------+----------+-----------+--------------------+-------------------
+ -infinity | | | | | | -infinity
+ infinity | | | | | | infinity
+(2 rows)
+
+SELECT col4 as time,
+ CAST(col4 AS time(2) DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col4 AS timetz DEFAULT NULL ON CONVERSION ERROR) IS NOT NULL as to_timetz,
+ CAST(col4 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval,
+ CAST(col4 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval_scale
+FROM test_safecast2;
+ time | to_times | to_timetz | to_interval | to_interval_scale
+-------------+-------------+-----------+-------------------------------+-------------------------------
+ 15:36:39 | 15:36:39 | t | @ 15 hours 36 mins 39 secs | @ 15 hours 36 mins 39 secs
+ 23:59:59.99 | 23:59:59.99 | t | @ 23 hours 59 mins 59.99 secs | @ 23 hours 59 mins 59.99 secs
+(2 rows)
+
+SELECT col5 as timetz,
+ CAST(col5 AS time DEFAULT NULL ON CONVERSION ERROR) as to_time,
+ CAST(col5 AS time(2) DEFAULT NULL ON CONVERSION ERROR) as to_time_scale,
+ CAST(col5 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col5 AS timetz(6) DEFAULT NULL ON CONVERSION ERROR) as to_timetz_scale,
+ CAST(col5 AS interval DEFAULT NULL ON CONVERSION ERROR) as to_interval,
+ CAST(col5 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval_scale
+FROM test_safecast2;
+ timetz | to_time | to_time_scale | to_timetz | to_timetz_scale | to_interval | to_interval_scale
+----------------+-------------+---------------+----------------+-----------------+-------------+-------------------
+ 15:36:39-04 | 15:36:39 | 15:36:39 | 15:36:39-04 | 15:36:39-04 | |
+ 23:59:59.99-07 | 23:59:59.99 | 23:59:59.99 | 23:59:59.99-07 | 23:59:59.99-07 | |
+(2 rows)
+
+CREATE TABLE test_safecast3(col0 jsonb);
+INSERT INTO test_safecast3(col0) VALUES ('"test"');
+SELECT col0 as jsonb,
+ CAST(col0 AS integer DEFAULT NULL ON CONVERSION ERROR) as to_integer,
+ CAST(col0 AS numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col0 AS bigint DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col0 AS float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col0 AS float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col0 AS boolean DEFAULT NULL ON CONVERSION ERROR) as to_bool,
+ CAST(col0 AS smallint DEFAULT NULL ON CONVERSION ERROR) as to_smallint
+FROM test_safecast3;
+ jsonb | to_integer | to_numeric | to_int8 | to_float4 | to_float8 | to_bool | to_smallint
+--------+------------+------------+---------+-----------+-----------+---------+-------------
+ "test" | | | | | | |
+(1 row)
+
+-- test deparse
+SET datestyle TO ISO, YMD;
+CREATE VIEW safecastview AS
+SELECT CAST('1234' as char(3) DEFAULT -1111 ON CONVERSION ERROR),
+ CAST(1 as date DEFAULT (('2025-Dec-06'::date + random(min=>1, max=>1::int))) ON CONVERSION ERROR) as cast0,
+ CAST(ARRAY[['1'], ['three'],['a']] AS int[] DEFAULT '{1,2}' ON CONVERSION ERROR) as cast1,
+ CAST(ARRAY[['1', '2'], ['three', 'a']] AS date[] DEFAULT NULL ON CONVERSION ERROR) as cast2,
+ CAST(ARRAY['three'] AS INT[] DEFAULT '{1,2}' ON CONVERSION ERROR) as cast3;
+\sv safecastview
+CREATE OR REPLACE VIEW public.safecastview AS
+ SELECT CAST('1234' AS character(3) DEFAULT '-1111'::integer::character(3) ON CONVERSION ERROR) AS bpchar,
+ CAST(1 AS date DEFAULT '2025-12-06'::date + random(min => 1, max => 1) ON CONVERSION ERROR) AS cast0,
+ CAST(ARRAY[ARRAY[1], ARRAY['three'], ARRAY['a']] AS integer[] DEFAULT '{1,2}'::integer[] ON CONVERSION ERROR) AS cast1,
+ CAST(ARRAY[ARRAY['1', '2'], ARRAY['three', 'a']] AS date[] DEFAULT NULL::date[] ON CONVERSION ERROR) AS cast2,
+ CAST(ARRAY['three'] AS integer[] DEFAULT '{1,2}'::integer[] ON CONVERSION ERROR) AS cast3
+SELECT * FROM safecastview;
+ bpchar | cast0 | cast1 | cast2 | cast3
+--------+------------+-------+-------+-------
+ 123 | 2025-12-07 | {1,2} | | {1,2}
+(1 row)
+
+CREATE VIEW safecastview1 AS
+SELECT CAST(ARRAY[['1'], ['three'],['a']] AS d_int_arr
+ DEFAULT '{41,43}' ON CONVERSION ERROR) as cast1,
+ CAST(ARRAY[['1', '2', 1.1], ['three', true, B'01']] AS d_int_arr
+ DEFAULT '{41,43}' ON CONVERSION ERROR) as cast2;
+\sv safecastview1
+CREATE OR REPLACE VIEW public.safecastview1 AS
+ SELECT CAST(ARRAY[ARRAY[1], ARRAY['three'], ARRAY['a']] AS d_int_arr DEFAULT '{41,43}'::integer[]::d_int_arr ON CONVERSION ERROR) AS cast1,
+ CAST(ARRAY[ARRAY[1, 2, 1.1::integer], ARRAY['three', true, '01'::"bit"]] AS d_int_arr DEFAULT '{41,43}'::integer[]::d_int_arr ON CONVERSION ERROR) AS cast2
+SELECT * FROM safecastview1;
+ cast1 | cast2
+---------+---------
+ {41,43} | {41,43}
+(1 row)
+
+RESET datestyle;
+--test CAST DEFAULT expression mutability
+CREATE INDEX cast_error_idx ON test_safecast3((CAST(col0 as int DEFAULT random(min=>1, max=>1) ON CONVERSION ERROR)));
+ERROR: functions in index expression must be marked IMMUTABLE
+CREATE INDEX cast_error_idx ON test_safecast3((CAST(col0 as xid DEFAULT NULL ON CONVERSION ERROR)));
+ERROR: data type xid has no default operator class for access method "btree"
+HINT: You must specify an operator class for the index or define a default operator class for the data type.
+CREATE INDEX test_safecast3_idx ON test_safecast3((CAST(col0 as int DEFAULT NULL ON CONVERSION ERROR))); --ok
+SELECT pg_get_indexdef('test_safecast3_idx'::regclass);
+ pg_get_indexdef
+------------------------------------------------------------------------------------------------------------------------------------------
+ CREATE INDEX test_safecast3_idx ON public.test_safecast3 USING btree ((CAST(col0 AS integer DEFAULT NULL::integer ON CONVERSION ERROR)))
+(1 row)
+
+DROP TABLE test_safecast;
+DROP TABLE test_safecast1;
+DROP TABLE test_safecast2;
+DROP TABLE test_safecast3;
+DROP TABLE tcast;
+DROP FUNCTION ret_int8;
+DROP FUNCTION ret_setint;
+DROP TYPE comp_domain_with_typmod;
+DROP TYPE comp2;
+DROP DOMAIN d_varchar;
+DROP DOMAIN d_int42;
+DROP DOMAIN d_char3_not_null;
+RESET extra_float_digits;
diff --git a/src/test/regress/expected/create_cast.out b/src/test/regress/expected/create_cast.out
index 0e69644bca2..0054ed0ef67 100644
--- a/src/test/regress/expected/create_cast.out
+++ b/src/test/regress/expected/create_cast.out
@@ -88,6 +88,11 @@ SELECT 1234::int4::casttesttype; -- Should work now
bar1234
(1 row)
+SELECT CAST(1234::int4 AS casttesttype DEFAULT NULL ON CONVERSION ERROR); -- error
+ERROR: cannot cast type integer to casttesttype when DEFAULT expression is specified in CAST ... ON CONVERSION ERROR
+LINE 1: SELECT CAST(1234::int4 AS casttesttype DEFAULT NULL ON CONVE...
+ ^
+HINT: Safe type cast for user-defined types are not yet supported
-- check dependencies generated for that
SELECT pg_describe_object(classid, objid, objsubid) as obj,
pg_describe_object(refclassid, refobjid, refobjsubid) as objref,
diff --git a/src/test/regress/expected/equivclass.out b/src/test/regress/expected/equivclass.out
index ad8ab294ff6..5aee2c7a9fb 100644
--- a/src/test/regress/expected/equivclass.out
+++ b/src/test/regress/expected/equivclass.out
@@ -95,6 +95,13 @@ create function int8alias1cmp(int8, int8alias1) returns int
strict immutable language internal as 'btint8cmp';
alter operator family integer_ops using btree add
function 1 int8alias1cmp (int8, int8alias1);
+-- int8alias2 binary-coercible to int8. so this is ok
+select cast('1'::int8 as int8alias2 default null on conversion error);
+ int8alias2
+------------
+ 1
+(1 row)
+
create table ec0 (ff int8 primary key, f1 int8, f2 int8);
create table ec1 (ff int8 primary key, f1 int8alias1, f2 int8alias2);
create table ec2 (xf int8 primary key, x1 int8alias1, x2 int8alias2);
diff --git a/src/test/regress/parallel_schedule b/src/test/regress/parallel_schedule
index cc6d799bcea..0b031a37c36 100644
--- a/src/test/regress/parallel_schedule
+++ b/src/test/regress/parallel_schedule
@@ -81,7 +81,7 @@ test: create_table_like alter_generic alter_operator misc async dbsize merge mis
# collate.linux.utf8 and collate.icu.utf8 tests cannot be run in parallel with each other
# psql depends on create_am
# amutils depends on geometry, create_index_spgist, hash_index, brin
-test: rules psql psql_crosstab psql_pipeline amutils stats_ext collate.linux.utf8 collate.windows.win1252
+test: rules psql psql_crosstab psql_pipeline amutils stats_ext collate.linux.utf8 collate.windows.win1252 cast
# ----------
# Run these alone so they don't run out of parallel workers
diff --git a/src/test/regress/sql/cast.sql b/src/test/regress/sql/cast.sql
new file mode 100644
index 00000000000..9b6f3cc0649
--- /dev/null
+++ b/src/test/regress/sql/cast.sql
@@ -0,0 +1,350 @@
+SET extra_float_digits = 0;
+
+-- CAST DEFAULT ON CONVERSION ERROR
+SELECT CAST(B'01' AS date DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(BIT'01' AS date DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(TRUE AS date DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(1.1 AS date DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(1 AS date DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(1111 AS "char" DEFAULT 'A' ON CONVERSION ERROR);
+
+--test source expression is a unknown const
+VALUES (CAST('error' AS integer ERROR ON CONVERSION ERROR)); --error
+VALUES (CAST('error' AS integer NULL ON CONVERSION ERROR));
+VALUES (CAST('error' AS integer DEFAULT 42 ON CONVERSION ERROR));
+SELECT CAST('a' as int DEFAULT 18 ON CONVERSION ERROR);
+SELECT CAST('a' as int DEFAULT sum(1) ON CONVERSION ERROR); --error
+SELECT CAST('a' as int DEFAULT sum(1) over() ON CONVERSION ERROR); --error
+SELECT CAST('a' as int DEFAULT (SELECT NULL) ON CONVERSION ERROR); --error
+SELECT CAST('a' as int DEFAULT 'b' ON CONVERSION ERROR); --error
+SELECT CAST('a'::int as int DEFAULT NULL ON CONVERSION ERROR); --error
+
+--the default expression’s collation should match the collation of the cast
+--target type
+VALUES (CAST('error' AS text DEFAULT '1' COLLATE "C" ON CONVERSION ERROR));
+
+VALUES (CAST('error' AS int2vector DEFAULT '1 3' ON CONVERSION ERROR));
+VALUES (CAST('error' AS int2vector[] DEFAULT '{1 3}' ON CONVERSION ERROR));
+
+-- test source expression contain subquery
+SELECT CAST((SELECT b FROM generate_series(1, 1), (VALUES('H')) s(b))
+ AS int2vector[] DEFAULT '{1 3}' ON CONVERSION ERROR);
+SELECT CAST((SELECT ARRAY((SELECT b FROM generate_series(1, 2) g, (VALUES('H')) s(b))))
+ AS INT[]
+ DEFAULT NULL ON CONVERSION ERROR);
+
+CREATE FUNCTION ret_int8() RETURNS BIGINT AS
+$$
+BEGIN RETURN 2147483648; END;
+$$
+LANGUAGE plpgsql IMMUTABLE;
+
+SELECT CAST('a' as int DEFAULT ret_int8() ON CONVERSION ERROR); --error
+SELECT CAST('a' as date DEFAULT ret_int8() ON CONVERSION ERROR); --error
+
+-- DEFAULT expression can not be set-returning
+CREATE FUNCTION ret_setint() RETURNS SETOF integer AS
+$$
+BEGIN RETURN QUERY EXECUTE 'select 1 union all select 1'; END;
+$$
+LANGUAGE plpgsql IMMUTABLE;
+
+CREATE TABLE tcast(a text[], b int GENERATED BY DEFAULT AS IDENTITY);
+INSERT INTO tcast VALUES ('{12}'), ('{1,a, b}'), ('{{1,2}, {c,d}}'), ('{13}');
+SELECT CAST('a' as int DEFAULT ret_setint() ON CONVERSION ERROR) FROM tcast; --error
+SELECT CAST(t AS text[] DEFAULT '{21,22, ' || b || '}' ON CONVERSION ERROR) FROM tcast as t;
+SELECT CAST(t.a AS int[] DEFAULT '{21,22}'::int[] || b ON CONVERSION ERROR) FROM tcast as t;
+
+-- test with user-defined type, domain, array over domain, domain over array
+CREATE DOMAIN d_int42 as int check (value = 42) NOT NULL;
+CREATE DOMAIN d_char3_not_null as char(3) NOT NULL;
+CREATE DOMAIN d_varchar as varchar(3) NOT NULL;
+CREATE DOMAIN d_int_arr as int[] check (value = '{41, 43}') NOT NULL;
+CREATE TYPE comp_domain_with_typmod AS (a d_char3_not_null, b int);
+CREATE TYPE comp2 AS (a d_varchar);
+SELECT CAST('(NULL)' AS comp2 DEFAULT '(1232)' ON CONVERSION ERROR); --error
+SELECT CAST('(NULL)' AS comp2 DEFAULT '(123)' ON CONVERSION ERROR);
+SELECT CAST(11 AS d_int42 DEFAULT 41 ON CONVERSION ERROR); --error
+SELECT CAST(11 AS d_int42 DEFAULT 42 ON CONVERSION ERROR);
+SELECT CAST(NULL AS d_int42 DEFAULT NULL ON CONVERSION ERROR); --error
+SELECT CAST(NULL AS d_int42 DEFAULT 42 ON CONVERSION ERROR);
+SELECT CAST('(,42)' AS comp_domain_with_typmod DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(NULL,42)' AS comp_domain_with_typmod DEFAULT '(1,2)' ON CONVERSION ERROR);
+SELECT CAST('(NULL,42)' AS comp_domain_with_typmod DEFAULT '(1234,2)' ON CONVERSION ERROR); --error
+
+SELECT CAST(ARRAY[42,41] AS d_int42[] DEFAULT '{42, 42}' ON CONVERSION ERROR);
+SELECT CAST(ARRAY[42,41] AS d_int_arr DEFAULT '{41, 43}' ON CONVERSION ERROR);
+
+-- test array coerce
+SELECT CAST(array['a'::text] AS int[] DEFAULT NULL ON CONVERSION ERROR); --error
+SELECT CAST(array['a'] AS int[] DEFAULT ARRAY[1] ON CONVERSION ERROR);
+SELECT CAST(array[11.12] AS date[] DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(array[11111111111111111] AS int[] DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(array[['abc'],[456]] AS int[] DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('{123,abc,456}' AS int[] DEFAULT '{-789}' ON CONVERSION ERROR);
+SELECT CAST('{234,def,567}'::text[] AS integer[] DEFAULT '{-1011}' ON CONVERSION ERROR);
+SELECT CAST(ARRAY[['1'], ['three'],['a']] AS int[] DEFAULT '{1,2}' ON CONVERSION ERROR);
+SELECT CAST(ARRAY[['1', '2'], ['three', 'a']] AS int[] DEFAULT '{21,22}' ON CONVERSION ERROR); --ok
+SELECT CAST(ARRAY[['1', '2'], ['three'::int, 'a']] AS int[] DEFAULT '{21,22}' ON CONVERSION ERROR); --error
+SELECT CAST(ARRAY[1, 'three'::int] AS int[] DEFAULT '{21,22}' ON CONVERSION ERROR); --error
+
+-----safe cast with geometry data type
+SELECT CAST('(1,2)'::point AS box DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[(NaN,1),(NaN,infinity)]'::lseg AS point DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[(1e+300,Infinity),(1e+300,Infinity)]'::lseg AS point DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[(1,2),(3,4)]'::path as polygon DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(NaN,1.0,NaN,infinity)'::box AS point DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(2.0,2.0,0.0,0.0)'::box AS lseg DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(2.0,2.0,0.0,0.0)'::box AS polygon DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(2.0,2.0,0.0,0.0)'::box AS path DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(2.0,infinity,NaN,infinity)'::box AS circle DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(NaN,0.0),(2.0,4.0),(0.0,infinity)'::polygon AS point DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(2.0,0.0),(2.0,4.0),(0.0,0.0)'::polygon AS path DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(2.0,0.0),(2.0,4.0),(0.0,0.0)'::polygon AS box DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('(NaN,infinity),(2.0,4.0),(0.0,infinity)'::polygon AS circle DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('<(5,1),3>'::circle AS point DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('<(3,5),0>'::circle as box DEFAULT NULL ON CONVERSION ERROR);
+
+-- not supported because the cast from circle to polygon is implemented as a SQL
+-- function, which cannot be error-safe.
+SELECT CAST('<(3,5),0>'::circle as polygon DEFAULT NULL ON CONVERSION ERROR);
+
+-----safe cast from/to money type is not supported, all the following would result error
+SELECT CAST(NULL::int8 AS money DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(NULL::int4 AS money DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(NULL::numeric AS money DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(NULL::money AS numeric DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST(NULL::money[] AS numeric[] DEFAULT NULL ON CONVERSION ERROR);
+
+-----safe cast from bytea type to other data types
+SELECT CAST ('\x112233445566778899'::bytea AS int8 DEFAULT 19 ON CONVERSION ERROR);
+SELECT CAST('\x123456789A'::bytea AS int4 DEFAULT 20 ON CONVERSION ERROR);
+SELECT CAST('\x123456'::bytea AS int2 DEFAULT 21 ON CONVERSION ERROR);
+
+-----safe cast from bit type to other data types
+SELECT CAST('111111111100001'::bit(100) AS INT DEFAULT 22 ON CONVERSION ERROR);
+SELECT CAST ('111111111100001'::bit(100) AS INT8 DEFAULT 23 ON CONVERSION ERROR);
+
+-----safe cast from text type to other data types
+select CAST('a.b.c.d'::text as regclass default NULL on conversion error);
+
+CREATE TABLE test_safecast(col0 text);
+INSERT INTO test_safecast(col0) VALUES ('<value>one</value');
+
+SELECT col0 as text,
+ CAST(col0 AS regclass DEFAULT NULL ON CONVERSION ERROR) as to_regclass,
+ CAST(col0 AS regclass DEFAULT NULL ON CONVERSION ERROR) IS NULL as expect_true,
+ CAST(col0 AS "char" DEFAULT NULL ON CONVERSION ERROR) as to_char,
+ CAST(col0 AS name DEFAULT NULL ON CONVERSION ERROR) as to_name,
+ CAST(col0 AS xml DEFAULT NULL ON CONVERSION ERROR) as to_xml
+FROM test_safecast;
+
+SELECT CAST('192.168.1.x' as inet DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('192.168.1.2/30' as cidr DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('22:00:5c:08:55:08:01:02'::macaddr8 as macaddr DEFAULT NULL ON CONVERSION ERROR);
+
+-----safe cast betweeen range data types
+SELECT CAST('[1,2]'::int4range AS int4multirange DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[1,2]'::int8range AS int8multirange DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[1,2]'::numrange AS nummultirange DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[-infinity,infinity]'::daterange AS datemultirange DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[-infinity,infinity]'::tsrange AS tsmultirange DEFAULT NULL ON CONVERSION ERROR);
+SELECT CAST('[-infinity,infinity]'::tstzrange AS tstzmultirange DEFAULT NULL ON CONVERSION ERROR);
+
+-----safe cast betweeen numeric data types
+CREATE TABLE test_safecast1(
+ col1 float4, col2 float8, col3 numeric, col4 numeric[],
+ col5 int2 default 32767,
+ col6 int4 default 32768,
+ col7 int8 default 4294967296);
+INSERT INTO test_safecast1 VALUES('11.1234', '11.1234', '9223372036854775808', '{11.1234}'::numeric[]);
+INSERT INTO test_safecast1 VALUES('inf', 'inf', 'inf', '{11.1234, 12, inf, NaN}'::numeric[]);
+INSERT INTO test_safecast1 VALUES('-inf', '-inf', '-inf', '{11.1234, 12, -inf, NaN}'::numeric[]);
+INSERT INTO test_safecast1 VALUES('NaN', 'NaN', 'NaN', '{11.1234, 12, -inf, NaN}'::numeric[]);
+
+SELECT col5 as int2,
+ CAST(col5 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col5 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col5 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col5 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col5 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col5 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col5 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col5 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+
+SELECT col6 as int4,
+ CAST(col6 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col6 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col6 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col6 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col6 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col6 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col6 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col6 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+
+SELECT col7 as int8,
+ CAST(col7 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col7 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col7 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col7 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col7 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col7 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col7 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col7 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+
+SELECT col3 as numeric,
+ CAST(col3 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col3 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col3 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col3 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col3 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col3 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col3 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col3 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+
+SELECT col4 as num_arr,
+ CAST(col4 AS int2[] DEFAULT NULL ON CONVERSION ERROR) as int2arr,
+ CAST(col4 AS int4[] DEFAULT NULL ON CONVERSION ERROR) as int4arr,
+ CAST(col4 as int8[] DEFAULT NULL ON CONVERSION ERROR) as int8arr,
+ CAST(col4 as float4[] DEFAULT NULL ON CONVERSION ERROR) as f4arr,
+ CAST(col4 as float8[] DEFAULT NULL ON CONVERSION ERROR) as f8arr,
+ CAST(col4 as numeric(10,1)[] DEFAULT NULL ON CONVERSION ERROR) as numarr
+FROM test_safecast1;
+
+SELECT col1 as float4,
+ CAST(col1 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col1 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col1 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col1 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col1 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col1 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col1 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col1 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+
+SELECT col2 as float8,
+ CAST(col2 AS int2 DEFAULT NULL ON CONVERSION ERROR) as to_int2,
+ CAST(col2 AS int4 DEFAULT NULL ON CONVERSION ERROR) as to_int4,
+ CAST(col2 AS oid DEFAULT NULL ON CONVERSION ERROR) as to_oid,
+ CAST(col2 as int8 DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col2 as float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col2 as float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col2 as numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col2 as numeric(10,1) DEFAULT NULL ON CONVERSION ERROR) as to_numeric_scale
+FROM test_safecast1;
+
+-- date/timestamp/interval related safe type cast
+CREATE TABLE test_safecast2(
+ col0 date, col1 timestamp, col2 timestamptz,
+ col3 interval, col4 time, col5 timetz);
+INSERT INTO test_safecast2 VALUES
+('-infinity', '-infinity', '-infinity', '-infinity',
+ '2003-03-07 15:36:39 America/New_York', '2003-07-07 15:36:39 America/New_York'),
+('-infinity', 'infinity', 'infinity', 'infinity',
+ '11:59:59.99 PM', '11:59:59.99 PM PDT');
+
+SELECT col0 as date,
+ CAST(col0 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col0 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col0 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col0 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col0 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale
+FROM test_safecast2;
+
+SELECT col1 as timestamp,
+ CAST(col1 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col1 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col1 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col1 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col1 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale
+FROM test_safecast2;
+
+SELECT col2 as timestamptz,
+ CAST(col2 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col2 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col2 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col2 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col2 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale
+FROM test_safecast2;
+
+SELECT col3 as interval,
+ CAST(col3 AS timestamptz DEFAULT NULL ON CONVERSION ERROR) as to_timestamptz,
+ CAST(col3 AS date DEFAULT NULL ON CONVERSION ERROR) as to_date,
+ CAST(col3 AS time DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col3 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col3 AS timestamp(2) DEFAULT NULL ON CONVERSION ERROR) as to_timestamp_scale,
+ CAST(col3 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval_scale
+FROM test_safecast2;
+
+SELECT col4 as time,
+ CAST(col4 AS time(2) DEFAULT NULL ON CONVERSION ERROR) as to_times,
+ CAST(col4 AS timetz DEFAULT NULL ON CONVERSION ERROR) IS NOT NULL as to_timetz,
+ CAST(col4 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval,
+ CAST(col4 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval_scale
+FROM test_safecast2;
+
+SELECT col5 as timetz,
+ CAST(col5 AS time DEFAULT NULL ON CONVERSION ERROR) as to_time,
+ CAST(col5 AS time(2) DEFAULT NULL ON CONVERSION ERROR) as to_time_scale,
+ CAST(col5 AS timetz DEFAULT NULL ON CONVERSION ERROR) as to_timetz,
+ CAST(col5 AS timetz(6) DEFAULT NULL ON CONVERSION ERROR) as to_timetz_scale,
+ CAST(col5 AS interval DEFAULT NULL ON CONVERSION ERROR) as to_interval,
+ CAST(col5 AS interval(2) DEFAULT NULL ON CONVERSION ERROR) as to_interval_scale
+FROM test_safecast2;
+
+CREATE TABLE test_safecast3(col0 jsonb);
+INSERT INTO test_safecast3(col0) VALUES ('"test"');
+SELECT col0 as jsonb,
+ CAST(col0 AS integer DEFAULT NULL ON CONVERSION ERROR) as to_integer,
+ CAST(col0 AS numeric DEFAULT NULL ON CONVERSION ERROR) as to_numeric,
+ CAST(col0 AS bigint DEFAULT NULL ON CONVERSION ERROR) as to_int8,
+ CAST(col0 AS float4 DEFAULT NULL ON CONVERSION ERROR) as to_float4,
+ CAST(col0 AS float8 DEFAULT NULL ON CONVERSION ERROR) as to_float8,
+ CAST(col0 AS boolean DEFAULT NULL ON CONVERSION ERROR) as to_bool,
+ CAST(col0 AS smallint DEFAULT NULL ON CONVERSION ERROR) as to_smallint
+FROM test_safecast3;
+
+-- test deparse
+SET datestyle TO ISO, YMD;
+CREATE VIEW safecastview AS
+SELECT CAST('1234' as char(3) DEFAULT -1111 ON CONVERSION ERROR),
+ CAST(1 as date DEFAULT (('2025-Dec-06'::date + random(min=>1, max=>1::int))) ON CONVERSION ERROR) as cast0,
+ CAST(ARRAY[['1'], ['three'],['a']] AS int[] DEFAULT '{1,2}' ON CONVERSION ERROR) as cast1,
+ CAST(ARRAY[['1', '2'], ['three', 'a']] AS date[] DEFAULT NULL ON CONVERSION ERROR) as cast2,
+ CAST(ARRAY['three'] AS INT[] DEFAULT '{1,2}' ON CONVERSION ERROR) as cast3;
+\sv safecastview
+SELECT * FROM safecastview;
+
+CREATE VIEW safecastview1 AS
+SELECT CAST(ARRAY[['1'], ['three'],['a']] AS d_int_arr
+ DEFAULT '{41,43}' ON CONVERSION ERROR) as cast1,
+ CAST(ARRAY[['1', '2', 1.1], ['three', true, B'01']] AS d_int_arr
+ DEFAULT '{41,43}' ON CONVERSION ERROR) as cast2;
+\sv safecastview1
+SELECT * FROM safecastview1;
+
+RESET datestyle;
+
+--test CAST DEFAULT expression mutability
+CREATE INDEX cast_error_idx ON test_safecast3((CAST(col0 as int DEFAULT random(min=>1, max=>1) ON CONVERSION ERROR)));
+CREATE INDEX cast_error_idx ON test_safecast3((CAST(col0 as xid DEFAULT NULL ON CONVERSION ERROR)));
+CREATE INDEX test_safecast3_idx ON test_safecast3((CAST(col0 as int DEFAULT NULL ON CONVERSION ERROR))); --ok
+SELECT pg_get_indexdef('test_safecast3_idx'::regclass);
+
+DROP TABLE test_safecast;
+DROP TABLE test_safecast1;
+DROP TABLE test_safecast2;
+DROP TABLE test_safecast3;
+DROP TABLE tcast;
+DROP FUNCTION ret_int8;
+DROP FUNCTION ret_setint;
+DROP TYPE comp_domain_with_typmod;
+DROP TYPE comp2;
+DROP DOMAIN d_varchar;
+DROP DOMAIN d_int42;
+DROP DOMAIN d_char3_not_null;
+RESET extra_float_digits;
diff --git a/src/test/regress/sql/create_cast.sql b/src/test/regress/sql/create_cast.sql
index 32187853cc7..0a15a795d87 100644
--- a/src/test/regress/sql/create_cast.sql
+++ b/src/test/regress/sql/create_cast.sql
@@ -62,6 +62,7 @@ $$ SELECT ('bar'::text || $1::text); $$;
CREATE CAST (int4 AS casttesttype) WITH FUNCTION bar_int4_text(int4) AS IMPLICIT;
SELECT 1234::int4::casttesttype; -- Should work now
+SELECT CAST(1234::int4 AS casttesttype DEFAULT NULL ON CONVERSION ERROR); -- error
-- check dependencies generated for that
SELECT pg_describe_object(classid, objid, objsubid) as obj,
diff --git a/src/test/regress/sql/equivclass.sql b/src/test/regress/sql/equivclass.sql
index 7fc2159349b..5ad1d26311d 100644
--- a/src/test/regress/sql/equivclass.sql
+++ b/src/test/regress/sql/equivclass.sql
@@ -98,6 +98,9 @@ create function int8alias1cmp(int8, int8alias1) returns int
alter operator family integer_ops using btree add
function 1 int8alias1cmp (int8, int8alias1);
+-- int8alias2 binary-coercible to int8. so this is ok
+select cast('1'::int8 as int8alias2 default null on conversion error);
+
create table ec0 (ff int8 primary key, f1 int8, f2 int8);
create table ec1 (ff int8 primary key, f1 int8alias1, f2 int8alias2);
create table ec2 (xf int8 primary key, x1 int8alias1, x2 int8alias2);
diff --git a/src/tools/pgindent/typedefs.list b/src/tools/pgindent/typedefs.list
index 9dd65b10254..44bba2e819f 100644
--- a/src/tools/pgindent/typedefs.list
+++ b/src/tools/pgindent/typedefs.list
@@ -2675,6 +2675,9 @@ STRLEN
SV
SYNCHRONIZATION_BARRIER
SYSTEM_INFO
+SafeTypeCast
+SafeTypeCastExpr
+SafeTypeCastState
SampleScan
SampleScanGetSampleSize_function
SampleScanState
--
2.34.1