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Arrange for function default arguments to be processed properly in expressions

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that are set up for execution with ExecPrepareExpr rather than going through
the full planner process.  By introducing an explicit notion of "expression
planning", this patch also lays a bit of groundwork for maybe someday
allowing sub-selects in standalone expressions.
This commit is contained in:
Tom Lane
2009-01-09 15:46:11 +00:00
parent d3706cb6d2
commit d04db37072
7 changed files with 73 additions and 21 deletions
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17
src/backend/executor/execQual.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.240 2009/01/01 17:23:41 momjian Exp $
* $PostgreSQL: pgsql/src/backend/executor/execQual.c,v 1.241 2009/01/09 15:46:10 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -45,7 +45,7 @@
#include "miscadmin.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "optimizer/planmain.h"
#include "optimizer/planner.h"
#include "pgstat.h"
#include "utils/acl.h"
#include "utils/builtins.h"
@ -4794,10 +4794,11 @@ ExecInitExpr(Expr *node, PlanState *parent)
* Plan tree context.
*
* This differs from ExecInitExpr in that we don't assume the caller is
* already running in the EState's per-query context. Also, we apply
* fix_opfuncids() to the passed expression tree to be sure it is ready
* to run. (In ordinary Plan trees the planner will have fixed opfuncids,
* but callers outside the executor will not have done this.)
* already running in the EState's per-query context. Also, we run the
* passed expression tree through expression_planner() to prepare it for
* execution. (In ordinary Plan trees the regular planning process will have
* made the appropriate transformations on expressions, but for standalone
* expressions this won't have happened.)
*/
ExprState *
ExecPrepareExpr(Expr *node, EState *estate)
@ -4805,10 +4806,10 @@ ExecPrepareExpr(Expr *node, EState *estate)
ExprState *result;
MemoryContext oldcontext;
fix_opfuncids((Node *) node);
oldcontext = MemoryContextSwitchTo(estate->es_query_cxt);
node = expression_planner(node);
result = ExecInitExpr(node, NULL);
MemoryContextSwitchTo(oldcontext);