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Do parse analysis of an EXPLAIN's contained statement during the normal

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parse analysis phase, rather than at execution time.  This makes parameter
handling work the same as it does in ordinary plannable queries, and in
particular fixes the incompatibility that Pavel pointed out with plpgsql's
new handling of variable references.  plancache.c gets a little bit
grottier, but the alternatives seem worse.
This commit is contained in:
Tom Lane
2010-01-15 22:36:35 +00:00
parent 00b5ccebdd
commit 08f8d478eb
9 changed files with 141 additions and 128 deletions
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8
src/include/nodes/parsenodes.h
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@@ -13,7 +13,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.423 2010/01/06 05:31:14 itagaki Exp $
* $PostgreSQL: pgsql/src/include/nodes/parsenodes.h,v 1.424 2010/01/15 22:36:35 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -2260,12 +2260,16 @@ typedef struct VacuumStmt
/* ----------------------
* Explain Statement
*
* The "query" field is either a raw parse tree (SelectStmt, InsertStmt, etc)
* or a Query node if parse analysis has been done. Note that rewriting and
* planning of the query are always postponed until execution of EXPLAIN.
* ----------------------
*/
typedef struct ExplainStmt
{
NodeTag type;
Node *query; /* the query (as a raw parse tree) */
Node *query; /* the query (see comments above) */
List *options; /* list of DefElem nodes */
} ExplainStmt;