transform-varbit-v1.patch
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Filename: transform-varbit-v1.patch
Type: text/plain
Part: 0
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Format: unified
Series: patch v1
| File | + | − |
|---|---|---|
| src/backend/utils/adt/varbit.c | 0 | 0 |
diff --git a/src/backend/utils/adt/varbit.c b/src/backend/utils/adt/varbit.c
index 3fa8117..e5a03b9 100644
*** a/src/backend/utils/adt/varbit.c
--- b/src/backend/utils/adt/varbit.c
***************
*** 18,23 ****
--- 18,25 ----
#include "access/htup.h"
#include "libpq/pqformat.h"
+ #include "nodes/nodeFuncs.h"
+ #include "parser/parse_clause.h"
#include "utils/array.h"
#include "utils/varbit.h"
***************
*** 646,651 **** varbit_send(PG_FUNCTION_ARGS)
--- 648,686 ----
}
/*
+ * varbit_transform()
+ * Flatten calls to our length coercion function that leave the new maximum
+ * length >= the previous maximum length. We ignore the isExplicit argument,
+ * which only affects truncation.
+ */
+ Datum
+ varbit_transform(PG_FUNCTION_ARGS)
+ {
+ FuncExpr *expr = (FuncExpr *) PG_GETARG_POINTER(0);
+ Node *typmod;
+ Node *ret = NULL;
+
+ if (!IsA(expr, FuncExpr))
+ PG_RETURN_POINTER(ret);
+
+ Assert(list_length(expr->args) == 3);
+ typmod = lsecond(expr->args);
+
+ if (IsA(typmod, Const))
+ {
+ Node *source = linitial(expr->args);
+ int32 new_typmod = DatumGetInt32(((Const *) typmod)->constvalue);
+ int32 old_max = exprTypmod(source);
+ int32 new_max = new_typmod;
+
+ if (new_max <= 0 || (old_max >= 0 && old_max <= new_max))
+ ret = relabel_to_typmod(source, new_typmod);
+ }
+
+ PG_RETURN_POINTER(ret);
+ }
+
+ /*
* varbit()
* Converts a varbit() type to a specific internal length.
* len is the maximum bitlength specified in the column definition.
diff --git a/src/include/catalog/pg_pindex c893c3a..2a71f82 100644
*** a/src/include/catalog/pg_proc.h
--- b/src/include/catalog/pg_proc.h
***************
*** 2005,2011 **** DESCR("convert bitstring to int4");
DATA(insert OID = 1685 ( bit PGNSP PGUID 12 1 0 0 0 f f f t f i 3 0 1560 "1560 23 16" _null_ _null_ _null_ _null_ bit _null_ _null_ _null_ ));
DESCR("adjust bit() to typmod length");
! DATA(insert OID = 1687 ( varbit PGNSP PGUID 12 1 0 0 0 f f f t f i 3 0 1562 "1562 23 16" _null_ _null_ _null_ _null_ varbit _null_ _null_ _null_ ));
DESCR("adjust varbit() to typmod length");
DATA(insert OID = 1698 ( position PGNSP PGUID 12 1 0 0 0 f f f t f i 2 0 23 "1560 1560" _null_ _null_ _null_ _null_ bitposition _null_ _null_ _null_ ));
--- 2005,2013 ----
DATA(insert OID = 1685 ( bit PGNSP PGUID 12 1 0 0 0 f f f t f i 3 0 1560 "1560 23 16" _null_ _null_ _null_ _null_ bit _null_ _null_ _null_ ));
DESCR("adjust bit() to typmod length");
! DATA(insert OID = 3145 ( varbit_transform PGNSP PGUID 12 1 0 0 0 f f f t f i 1 0 2281 "2281" _null_ _null_ _null_ _null_ varbit_transform _null_ _null_ _null_ ));
! DESCR("transform a varbit length coercion");
! DATA(insert OID = 1687 ( varbit PGNSP PGUID 12 1 0 0 3145 f f f t f i 3 0 1562 "1562 23 16" _null_ _null_ _null_ _null_ varbit _null_ _null_ _null_ ));
DESCR("adjust varbit() to typmod length");
DATA(insert OID = 1698 ( position PGNSP PGUID 12 1 0 0 0 f f f t f i 2 0 23 "1560 1560" _null_ _null_ _null_ _null_ bitposition _null_ _null_ _null_ ));
diff --git a/src/include/utils/varbiindex e329d52..5f2d8dd 100644
*** a/src/include/utils/varbit.h
--- b/src/include/utils/varbit.h
***************
*** 72,77 **** extern Datum varbit_send(PG_FUNCTION_ARGS);
--- 72,78 ----
extern Datum varbittypmodin(PG_FUNCTION_ARGS);
extern Datum varbittypmodout(PG_FUNCTION_ARGS);
extern Datum bit(PG_FUNCTION_ARGS);
+ extern Datum varbit_transform(PG_FUNCTION_ARGS);
extern Datum varbit(PG_FUNCTION_ARGS);
extern Datum biteq(PG_FUNCTION_ARGS);
extern Datum bitne(PG_FUNCTION_ARGS);
diff --git a/src/test/regress/expindex 301cc4b..ca83664 100644