fix-rewrite-tlist-v3.patch

text/plain

Filename: fix-rewrite-tlist-v3.patch
Type: text/plain
Part: 0
Message: Re: Bug in ExecModifyTable function and trigger issues for foreign tables

Patch

Format: context
Series: patch v3
File+
contrib/postgres_fdw/expected/postgres_fdw.out 59 0
contrib/postgres_fdw/sql/postgres_fdw.sql 20 0
doc/src/sgml/fdwhandler.sgml 4 0
doc/src/sgml/rules.sgml 4 4
src/backend/executor/nodeModifyTable.c 1 0
src/backend/optimizer/plan/planner.c 2 0
src/backend/optimizer/prep/preptlist.c 121 13
src/backend/rewrite/rewriteHandler.c 16 0
src/include/optimizer/prep.h 1 0
*** a/contrib/postgres_fdw/expected/postgres_fdw.out
--- b/contrib/postgres_fdw/expected/postgres_fdw.out
***************
*** 6924,6929 **** update bar set f2 = f2 + 100 returning *;
--- 6924,6988 ----
    7 | 277
  (6 rows)
  
+ -- Test that UPDATE/DELETE with inherited target works with row-level triggers
+ CREATE TRIGGER trig_row_before
+ BEFORE UPDATE OR DELETE ON bar2
+ FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
+ CREATE TRIGGER trig_row_after
+ AFTER UPDATE OR DELETE ON bar2
+ FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
+ explain (verbose, costs off)
+ update bar set f2 = f2 + 100;
+                                       QUERY PLAN                                      
+ --------------------------------------------------------------------------------------
+  Update on public.bar
+    Update on public.bar
+    Foreign Update on public.bar2
+      Remote SQL: UPDATE public.loct2 SET f2 = $2 WHERE ctid = $1 RETURNING f1, f2, f3
+    ->  Seq Scan on public.bar
+          Output: bar.f1, (bar.f2 + 100), bar.ctid
+    ->  Foreign Scan on public.bar2
+          Output: bar2.f1, (bar2.f2 + 100), bar2.f3, bar2.ctid, bar2.*
+          Remote SQL: SELECT f1, f2, f3, ctid FROM public.loct2 FOR UPDATE
+ (9 rows)
+ 
+ update bar set f2 = f2 + 100;
+ NOTICE:  trig_row_before(23, skidoo) BEFORE ROW UPDATE ON bar2
+ NOTICE:  OLD: (3,333,33),NEW: (3,433,33)
+ NOTICE:  trig_row_before(23, skidoo) BEFORE ROW UPDATE ON bar2
+ NOTICE:  OLD: (4,344,44),NEW: (4,444,44)
+ NOTICE:  trig_row_before(23, skidoo) BEFORE ROW UPDATE ON bar2
+ NOTICE:  OLD: (7,277,77),NEW: (7,377,77)
+ NOTICE:  trig_row_after(23, skidoo) AFTER ROW UPDATE ON bar2
+ NOTICE:  OLD: (3,333,33),NEW: (3,433,33)
+ NOTICE:  trig_row_after(23, skidoo) AFTER ROW UPDATE ON bar2
+ NOTICE:  OLD: (4,344,44),NEW: (4,444,44)
+ NOTICE:  trig_row_after(23, skidoo) AFTER ROW UPDATE ON bar2
+ NOTICE:  OLD: (7,277,77),NEW: (7,377,77)
+ explain (verbose, costs off)
+ delete from bar where f2 < 400;
+                                          QUERY PLAN                                          
+ ---------------------------------------------------------------------------------------------
+  Delete on public.bar
+    Delete on public.bar
+    Foreign Delete on public.bar2
+      Remote SQL: DELETE FROM public.loct2 WHERE ctid = $1 RETURNING f1, f2, f3
+    ->  Seq Scan on public.bar
+          Output: bar.ctid
+          Filter: (bar.f2 < 400)
+    ->  Foreign Scan on public.bar2
+          Output: bar2.ctid, bar2.*
+          Remote SQL: SELECT f1, f2, f3, ctid FROM public.loct2 WHERE ((f2 < 400)) FOR UPDATE
+ (10 rows)
+ 
+ delete from bar where f2 < 400;
+ NOTICE:  trig_row_before(23, skidoo) BEFORE ROW DELETE ON bar2
+ NOTICE:  OLD: (7,377,77)
+ NOTICE:  trig_row_after(23, skidoo) AFTER ROW DELETE ON bar2
+ NOTICE:  OLD: (7,377,77)
+ -- cleanup
+ DROP TRIGGER trig_row_before ON bar2;
+ DROP TRIGGER trig_row_after ON bar2;
  drop table foo cascade;
  NOTICE:  drop cascades to foreign table foo2
  drop table bar cascade;
*** a/contrib/postgres_fdw/sql/postgres_fdw.sql
--- b/contrib/postgres_fdw/sql/postgres_fdw.sql
***************
*** 1609,1614 **** explain (verbose, costs off)
--- 1609,1634 ----
  update bar set f2 = f2 + 100 returning *;
  update bar set f2 = f2 + 100 returning *;
  
+ -- Test that UPDATE/DELETE with inherited target works with row-level triggers
+ CREATE TRIGGER trig_row_before
+ BEFORE UPDATE OR DELETE ON bar2
+ FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
+ 
+ CREATE TRIGGER trig_row_after
+ AFTER UPDATE OR DELETE ON bar2
+ FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
+ 
+ explain (verbose, costs off)
+ update bar set f2 = f2 + 100;
+ update bar set f2 = f2 + 100;
+ 
+ explain (verbose, costs off)
+ delete from bar where f2 < 400;
+ delete from bar where f2 < 400;
+ 
+ -- cleanup
+ DROP TRIGGER trig_row_before ON bar2;
+ DROP TRIGGER trig_row_after ON bar2;
  drop table foo cascade;
  drop table bar cascade;
  drop table loct1;
*** a/doc/src/sgml/fdwhandler.sgml
--- b/doc/src/sgml/fdwhandler.sgml
***************
*** 428,438 **** AddForeignUpdateTargets (Query *parsetree,
       Avoid using names matching <literal>ctid<replaceable>N</></literal>,
       <literal>wholerow</literal>, or
       <literal>wholerow<replaceable>N</></literal>, as the core system can
!      generate junk columns of these names.
      </para>
  
      <para>
!      This function is called in the rewriter, not the planner, so the
       information available is a bit different from that available to the
       planning routines.
       <literal>parsetree</> is the parse tree for the <command>UPDATE</> or
--- 428,440 ----
       Avoid using names matching <literal>ctid<replaceable>N</></literal>,
       <literal>wholerow</literal>, or
       <literal>wholerow<replaceable>N</></literal>, as the core system can
!      generate junk columns of these names.  Also, as it assumes that those
!      expressions have already been simplified enough to execute,
!      apply <function>eval_const_expressions</> if necessary.
      </para>
  
      <para>
!      Although this function is called in the planner, the
       information available is a bit different from that available to the
       planning routines.
       <literal>parsetree</> is the parse tree for the <command>UPDATE</> or
*** a/doc/src/sgml/rules.sgml
--- b/doc/src/sgml/rules.sgml
***************
*** 167,178 ****
  
      <para>
          <command>DELETE</command> commands don't need a normal target list
!         because they don't produce any result.  Instead, the rule system
          adds a special <acronym>CTID</> entry to the empty target list,
          to allow the executor to find the row to be deleted.
          (<acronym>CTID</> is added when the result relation is an ordinary
!         table.  If it is a view, a whole-row variable is added instead,
!         as described in <xref linkend="rules-views-update">.)
      </para>
  
      <para>
--- 167,178 ----
  
      <para>
          <command>DELETE</command> commands don't need a normal target list
!         because they don't produce any result.  Instead, the planner
          adds a special <acronym>CTID</> entry to the empty target list,
          to allow the executor to find the row to be deleted.
          (<acronym>CTID</> is added when the result relation is an ordinary
!         table.  If it is a view, a whole-row variable is added instead, by
!         the rule system, as described in <xref linkend="rules-views-update">.)
      </para>
  
      <para>
***************
*** 194,200 ****
          column = expression</literal> part of the command.  The planner will
          handle missing columns by inserting expressions that copy the values
          from the old row into the new one.  Just as for <command>DELETE</>,
!         the rule system adds a <acronym>CTID</> or whole-row variable so that
          the executor can identify the old row to be updated.
      </para>
  
--- 194,200 ----
          column = expression</literal> part of the command.  The planner will
          handle missing columns by inserting expressions that copy the values
          from the old row into the new one.  Just as for <command>DELETE</>,
!         a <acronym>CTID</> or whole-row variable is added so that
          the executor can identify the old row to be updated.
      </para>
  
*** a/src/backend/executor/nodeModifyTable.c
--- b/src/backend/executor/nodeModifyTable.c
***************
*** 1661,1666 **** ExecModifyTable(ModifyTableState *node)
--- 1661,1667 ----
  		EvalPlanQualSetSlot(&node->mt_epqstate, planSlot);
  		slot = planSlot;
  
+ 		tupleid = NULL;
  		oldtuple = NULL;
  		if (junkfilter != NULL)
  		{
*** a/src/backend/optimizer/plan/planner.c
--- b/src/backend/optimizer/plan/planner.c
***************
*** 1458,1464 **** grouping_planner(PlannerInfo *root, bool inheritance_update,
  				 double tuple_fraction)
  {
  	Query	   *parse = root->parse;
! 	List	   *tlist = parse->targetList;
  	int64		offset_est = 0;
  	int64		count_est = 0;
  	double		limit_tuples = -1.0;
--- 1458,1464 ----
  				 double tuple_fraction)
  {
  	Query	   *parse = root->parse;
! 	List	   *tlist;
  	int64		offset_est = 0;
  	int64		count_est = 0;
  	double		limit_tuples = -1.0;
***************
*** 1588,1594 **** grouping_planner(PlannerInfo *root, bool inheritance_update,
  		}
  
  		/* Preprocess targetlist */
! 		tlist = preprocess_targetlist(root, tlist);
  
  		if (parse->onConflict)
  			parse->onConflict->onConflictSet =
--- 1588,1594 ----
  		}
  
  		/* Preprocess targetlist */
! 		tlist = preprocess_targetlist(root);
  
  		if (parse->onConflict)
  			parse->onConflict->onConflictSet =
*** a/src/backend/optimizer/prep/preptlist.c
--- b/src/backend/optimizer/prep/preptlist.c
***************
*** 4,23 ****
   *	  Routines to preprocess the parse tree target list
   *
   * For INSERT and UPDATE queries, the targetlist must contain an entry for
!  * each attribute of the target relation in the correct order.  For all query
!  * types, we may need to add junk tlist entries for Vars used in the RETURNING
!  * list and row ID information needed for SELECT FOR UPDATE locking and/or
!  * EvalPlanQual checking.
   *
!  * The rewriter's rewriteTargetListIU and rewriteTargetListUD routines
!  * also do preprocessing of the targetlist.  The division of labor between
!  * here and there is partially historical, but it's not entirely arbitrary.
!  * In particular, consider an UPDATE across an inheritance tree.  What the
!  * rewriter does need be done only once (because it depends only on the
!  * properties of the parent relation).  What's done here has to be done over
!  * again for each child relation, because it depends on the column list of
!  * the child, which might have more columns and/or a different column order
!  * than the parent.
   *
   * The fact that rewriteTargetListIU sorts non-resjunk tlist entries by column
   * position, which expand_targetlist depends on, violates the above comment
--- 4,24 ----
   *	  Routines to preprocess the parse tree target list
   *
   * For INSERT and UPDATE queries, the targetlist must contain an entry for
!  * each attribute of the target relation in the correct order.  For UPDATE and
!  * DELETE queries, it must also contain a junk tlist entry needed to allow the
!  * executor to identify the physical locations of the rows to be updated or
!  * deleted.  For all query types, we may need to add junk tlist entries for
!  * Vars used in the RETURNING list and row ID information needed for SELECT
!  * FOR UPDATE locking and/or EvalPlanQual checking.
   *
!  * The rewriter's rewriteTargetListIU routine also does preprocessing of the
!  * targetlist.  The division of labor between here and there is partially
!  * historical, but it's not entirely arbitrary.  In particular, consider an
!  * UPDATE across an inheritance tree.  What the rewriter does need be done
!  * only once (because it depends only on the properties of the parent
!  * relation).  What's done here has to be done over again for each child
!  * relation, because it depends on the column list of the child, which might
!  * have more columns and/or a different column order than the parent.
   *
   * The fact that rewriteTargetListIU sorts non-resjunk tlist entries by column
   * position, which expand_targetlist depends on, violates the above comment
***************
*** 41,47 ****
--- 42,50 ----
  #include "access/heapam.h"
  #include "access/sysattr.h"
  #include "catalog/pg_type.h"
+ #include "foreign/fdwapi.h"
  #include "nodes/makefuncs.h"
+ #include "optimizer/clauses.h"
  #include "optimizer/prep.h"
  #include "optimizer/tlist.h"
  #include "optimizer/var.h"
***************
*** 52,57 ****
--- 55,62 ----
  
  static List *expand_targetlist(List *tlist, int command_type,
  				  Index result_relation, List *range_table);
+ static void rewrite_targetlist(PlannerInfo *root, Query *parse,
+ 				   Index result_relation, List *range_table);
  
  
  /*
***************
*** 61,72 **** static List *expand_targetlist(List *tlist, int command_type,
   *	  Returns the new targetlist.
   */
  List *
! preprocess_targetlist(PlannerInfo *root, List *tlist)
  {
  	Query	   *parse = root->parse;
  	int			result_relation = parse->resultRelation;
  	List	   *range_table = parse->rtable;
  	CmdType		command_type = parse->commandType;
  	ListCell   *lc;
  
  	/*
--- 66,78 ----
   *	  Returns the new targetlist.
   */
  List *
! preprocess_targetlist(PlannerInfo *root)
  {
  	Query	   *parse = root->parse;
  	int			result_relation = parse->resultRelation;
  	List	   *range_table = parse->rtable;
  	CmdType		command_type = parse->commandType;
+ 	List	   *tlist;
  	ListCell   *lc;
  
  	/*
***************
*** 82,87 **** preprocess_targetlist(PlannerInfo *root, List *tlist)
--- 88,103 ----
  	}
  
  	/*
+ 	 * For UPDATE/DELETE, add a necessary junk column needed to allow the
+ 	 * executor to identify the physical locations of the rows to be updated
+ 	 * or deleted.
+ 	 */
+ 	if (command_type == CMD_UPDATE || command_type == CMD_DELETE)
+ 		rewrite_targetlist(root, parse, result_relation, range_table);
+ 
+ 	tlist = parse->targetList;
+ 
+ 	/*
  	 * for heap_form_tuple to work, the targetlist must match the exact order
  	 * of the attributes. We also need to fill in any missing attributes. -ay
  	 * 10/94
***************
*** 391,396 **** expand_targetlist(List *tlist, int command_type,
--- 407,503 ----
  	return new_tlist;
  }
  
+ /*
+  * rewrite_targetlist - rewrite UPDATE/DELETE targetlist as needed
+  *
+  * This function adds a "junk" TLE that is needed to allow the executor to
+  * find the original row for the update or delete.  When the target relation
+  * is a regular table, the junk TLE emits the ctid attribute of the original
+  * row.  When the target relation is a foreign table, we let the FDW decide
+  * what to add.
+  */
+ static void
+ rewrite_targetlist(PlannerInfo *root, Query *parse,
+ 				   Index result_relation, List *range_table)
+ {
+ 	Var		   *var = NULL;
+ 	const char *attrname;
+ 	TargetEntry *tle;
+ 	RangeTblEntry *target_rte;
+ 	Relation target_relation;
+ 
+ 	target_rte = rt_fetch(result_relation, range_table);
+ 
+ 	/*
+ 	 * We assume that the relation was already locked by the rewriter, so
+ 	 * we need no lock here.
+ 	 */
+ 	target_relation = heap_open(target_rte->relid, NoLock);
+ 
+ 	if (target_relation->rd_rel->relkind == RELKIND_RELATION ||
+ 		target_relation->rd_rel->relkind == RELKIND_MATVIEW ||
+ 		target_relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ 	{
+ 		/*
+ 		 * Emit CTID so that executor can find the row to update or delete.
+ 		 */
+ 		var = makeVar(result_relation,
+ 					  SelfItemPointerAttributeNumber,
+ 					  TIDOID,
+ 					  -1,
+ 					  InvalidOid,
+ 					  0);
+ 
+ 		attrname = "ctid";
+ 	}
+ 	else if (target_relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
+ 	{
+ 		/*
+ 		 * Let the foreign table's FDW add whatever junk TLEs it wants.
+ 		 */
+ 		FdwRoutine *fdwroutine;
+ 
+ 		fdwroutine = GetFdwRoutineForRelation(target_relation, false);
+ 
+ 		if (fdwroutine->AddForeignUpdateTargets != NULL)
+ 			fdwroutine->AddForeignUpdateTargets(parse, target_rte,
+ 												target_relation);
+ 
+ 		/*
+ 		 * If we have a row-level trigger corresponding to the operation, emit
+ 		 * a whole-row Var so that executor will have the "old" row to pass to
+ 		 * the trigger.  Alas, this misses system columns.
+ 		 */
+ 		if (target_relation->trigdesc &&
+ 			((parse->commandType == CMD_UPDATE &&
+ 			  (target_relation->trigdesc->trig_update_after_row ||
+ 			   target_relation->trigdesc->trig_update_before_row)) ||
+ 			 (parse->commandType == CMD_DELETE &&
+ 			  (target_relation->trigdesc->trig_delete_after_row ||
+ 			   target_relation->trigdesc->trig_delete_before_row))))
+ 		{
+ 			var = makeWholeRowVar(target_rte,
+ 								  result_relation,
+ 								  0,
+ 								  false);
+ 
+ 			attrname = "wholerow";
+ 		}
+ 	}
+ 
+ 	if (var != NULL)
+ 	{
+ 		tle = makeTargetEntry((Expr *) var,
+ 							  list_length(parse->targetList) + 1,
+ 							  pstrdup(attrname),
+ 							  true);
+ 
+ 		parse->targetList = lappend(parse->targetList, tle);
+ 	}
+ 
+ 	heap_close(target_relation, NoLock);
+ }
+ 
  
  /*
   * Locate PlanRowMark for given RT index, or return NULL if none
*** a/src/backend/rewrite/rewriteHandler.c
--- b/src/backend/rewrite/rewriteHandler.c
***************
*** 72,79 **** static TargetEntry *process_matched_tle(TargetEntry *src_tle,
  static Node *get_assignment_input(Node *node);
  static void rewriteValuesRTE(RangeTblEntry *rte, Relation target_relation,
  				 List *attrnos);
- static void rewriteTargetListUD(Query *parsetree, RangeTblEntry *target_rte,
- 					Relation target_relation);
  static void markQueryForLocking(Query *qry, Node *jtnode,
  					LockClauseStrength strength, LockWaitPolicy waitPolicy,
  					bool pushedDown);
--- 72,77 ----
***************
*** 1288,1390 **** rewriteValuesRTE(RangeTblEntry *rte, Relation target_relation, List *attrnos)
  
  
  /*
-  * rewriteTargetListUD - rewrite UPDATE/DELETE targetlist as needed
-  *
-  * This function adds a "junk" TLE that is needed to allow the executor to
-  * find the original row for the update or delete.  When the target relation
-  * is a regular table, the junk TLE emits the ctid attribute of the original
-  * row.  When the target relation is a view, there is no ctid, so we instead
-  * emit a whole-row Var that will contain the "old" values of the view row.
-  * If it's a foreign table, we let the FDW decide what to add.
-  *
-  * For UPDATE queries, this is applied after rewriteTargetListIU.  The
-  * ordering isn't actually critical at the moment.
-  */
- static void
- rewriteTargetListUD(Query *parsetree, RangeTblEntry *target_rte,
- 					Relation target_relation)
- {
- 	Var		   *var = NULL;
- 	const char *attrname;
- 	TargetEntry *tle;
- 
- 	if (target_relation->rd_rel->relkind == RELKIND_RELATION ||
- 		target_relation->rd_rel->relkind == RELKIND_MATVIEW ||
- 		target_relation->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
- 	{
- 		/*
- 		 * Emit CTID so that executor can find the row to update or delete.
- 		 */
- 		var = makeVar(parsetree->resultRelation,
- 					  SelfItemPointerAttributeNumber,
- 					  TIDOID,
- 					  -1,
- 					  InvalidOid,
- 					  0);
- 
- 		attrname = "ctid";
- 	}
- 	else if (target_relation->rd_rel->relkind == RELKIND_FOREIGN_TABLE)
- 	{
- 		/*
- 		 * Let the foreign table's FDW add whatever junk TLEs it wants.
- 		 */
- 		FdwRoutine *fdwroutine;
- 
- 		fdwroutine = GetFdwRoutineForRelation(target_relation, false);
- 
- 		if (fdwroutine->AddForeignUpdateTargets != NULL)
- 			fdwroutine->AddForeignUpdateTargets(parsetree, target_rte,
- 												target_relation);
- 
- 		/*
- 		 * If we have a row-level trigger corresponding to the operation, emit
- 		 * a whole-row Var so that executor will have the "old" row to pass to
- 		 * the trigger.  Alas, this misses system columns.
- 		 */
- 		if (target_relation->trigdesc &&
- 			((parsetree->commandType == CMD_UPDATE &&
- 			  (target_relation->trigdesc->trig_update_after_row ||
- 			   target_relation->trigdesc->trig_update_before_row)) ||
- 			 (parsetree->commandType == CMD_DELETE &&
- 			  (target_relation->trigdesc->trig_delete_after_row ||
- 			   target_relation->trigdesc->trig_delete_before_row))))
- 		{
- 			var = makeWholeRowVar(target_rte,
- 								  parsetree->resultRelation,
- 								  0,
- 								  false);
- 
- 			attrname = "wholerow";
- 		}
- 	}
- 	else
- 	{
- 		/*
- 		 * Emit whole-row Var so that executor will have the "old" view row to
- 		 * pass to the INSTEAD OF trigger.
- 		 */
- 		var = makeWholeRowVar(target_rte,
- 							  parsetree->resultRelation,
- 							  0,
- 							  false);
- 
- 		attrname = "wholerow";
- 	}
- 
- 	if (var != NULL)
- 	{
- 		tle = makeTargetEntry((Expr *) var,
- 							  list_length(parsetree->targetList) + 1,
- 							  pstrdup(attrname),
- 							  true);
- 
- 		parsetree->targetList = lappend(parsetree->targetList, tle);
- 	}
- }
- 
- 
- /*
   * matchLocks -
   *	  match the list of locks and returns the matching rules
   */
--- 1286,1291 ----
***************
*** 1497,1502 **** ApplyRetrieveRule(Query *parsetree,
--- 1398,1405 ----
  				 parsetree->commandType == CMD_DELETE)
  		{
  			RangeTblEntry *newrte;
+ 			Var		   *var;
+ 			TargetEntry *tle;
  
  			rte = rt_fetch(rt_index, parsetree->rtable);
  			newrte = copyObject(rte);
***************
*** 1527,1532 **** ApplyRetrieveRule(Query *parsetree,
--- 1430,1448 ----
  			ChangeVarNodes((Node *) parsetree->returningList, rt_index,
  						   parsetree->resultRelation, 0);
  
+ 			/*
+ 			 * To allow the executor to find the original view row to pass to
+ 			 * the INSTEAD OF trigger, we add a whole-row reference to the
+ 			 * original RTE to the query's targetlist.
+ 			 */
+ 			var = makeWholeRowVar(rte, rt_index, 0, false);
+ 			tle = makeTargetEntry((Expr *) var,
+ 								  list_length(parsetree->targetList) + 1,
+ 								  pstrdup("wholerow"),
+ 								  true);
+ 
+ 			parsetree->targetList = lappend(parsetree->targetList, tle);
+ 
  			/* Now, continue with expanding the original view RTE */
  		}
  		else
***************
*** 2967,2992 **** rewriteTargetView(Query *parsetree, Relation view)
  	view_rte->securityQuals = NIL;
  
  	/*
- 	 * For UPDATE/DELETE, rewriteTargetListUD will have added a wholerow junk
- 	 * TLE for the view to the end of the targetlist, which we no longer need.
- 	 * Remove it to avoid unnecessary work when we process the targetlist.
- 	 * Note that when we recurse through rewriteQuery a new junk TLE will be
- 	 * added to allow the executor to find the proper row in the new target
- 	 * relation.  (So, if we failed to do this, we might have multiple junk
- 	 * TLEs with the same name, which would be disastrous.)
- 	 */
- 	if (parsetree->commandType != CMD_INSERT)
- 	{
- 		TargetEntry *tle = (TargetEntry *) llast(parsetree->targetList);
- 
- 		Assert(tle->resjunk);
- 		Assert(IsA(tle->expr, Var) &&
- 			   ((Var *) tle->expr)->varno == parsetree->resultRelation &&
- 			   ((Var *) tle->expr)->varattno == 0);
- 		parsetree->targetList = list_delete_ptr(parsetree->targetList, tle);
- 	}
- 
- 	/*
  	 * Now update all Vars in the outer query that reference the view to
  	 * reference the appropriate column of the base relation instead.
  	 */
--- 2883,2888 ----
***************
*** 3347,3357 **** RewriteQuery(Query *parsetree, List *rewrite_events)
  									parsetree->override,
  									rt_entry_relation,
  									parsetree->resultRelation, NULL);
- 			rewriteTargetListUD(parsetree, rt_entry, rt_entry_relation);
  		}
  		else if (event == CMD_DELETE)
  		{
! 			rewriteTargetListUD(parsetree, rt_entry, rt_entry_relation);
  		}
  		else
  			elog(ERROR, "unrecognized commandType: %d", (int) event);
--- 3243,3252 ----
  									parsetree->override,
  									rt_entry_relation,
  									parsetree->resultRelation, NULL);
  		}
  		else if (event == CMD_DELETE)
  		{
! 			/* Nothing to do here */
  		}
  		else
  			elog(ERROR, "unrecognized commandType: %d", (int) event);
*** a/src/include/optimizer/prep.h
--- b/src/include/optimizer/prep.h
***************
*** 38,44 **** extern Expr *canonicalize_qual(Expr *qual);
  /*
   * prototypes for preptlist.c
   */
! extern List *preprocess_targetlist(PlannerInfo *root, List *tlist);
  
  extern List *preprocess_onconflict_targetlist(List *tlist,
  								 int result_relation, List *range_table);
--- 38,44 ----
  /*
   * prototypes for preptlist.c
   */
! extern List *preprocess_targetlist(PlannerInfo *root);
  
  extern List *preprocess_onconflict_targetlist(List *tlist,
  								 int result_relation, List *range_table);