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Modify processing of DECLARE CURSOR and EXPLAIN so that they can resolve the

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types of unspecified parameters when submitted via extended query protocol.
This worked in 8.2 but I had broken it during plancache changes.  DECLARE
CURSOR is now treated almost exactly like a plain SELECT through parse
analysis, rewrite, and planning; only just before sending to the executor
do we divert it away to ProcessUtility.  This requires a special-case check
in a number of places, but practically all of them were already special-casing
SELECT INTO, so it's not too ugly.  (Maybe it would be a good idea to merge
the two by treating IntoClause as a form of utility statement?  Not going to
worry about that now, though.)  That approach doesn't work for EXPLAIN,
however, so for that I punted and used a klugy solution of running parse
analysis an extra time if under extended query protocol.
This commit is contained in:
Tom Lane
2007-04-27 22:05:49 +00:00
parent a264671116
commit bbbe825f5f
26 changed files with 333 additions and 246 deletions
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9
src/backend/nodes/outfuncs.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.305 2007/03/27 23:21:09 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.306 2007/04/27 22:05:47 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@@ -244,7 +244,8 @@ _outPlannedStmt(StringInfo str, PlannedStmt *node)
WRITE_NODE_FIELD(planTree);
WRITE_NODE_FIELD(rtable);
WRITE_NODE_FIELD(resultRelations);
WRITE_NODE_FIELD(into);
WRITE_NODE_FIELD(utilityStmt);
WRITE_NODE_FIELD(intoClause);
WRITE_NODE_FIELD(subplans);
WRITE_BITMAPSET_FIELD(rewindPlanIDs);
WRITE_NODE_FIELD(returningLists);
@@ -1549,7 +1550,7 @@ _outSelectStmt(StringInfo str, SelectStmt *node)
WRITE_NODE_TYPE("SELECT");
WRITE_NODE_FIELD(distinctClause);
WRITE_NODE_FIELD(into);
WRITE_NODE_FIELD(intoClause);
WRITE_NODE_FIELD(targetList);
WRITE_NODE_FIELD(fromClause);
WRITE_NODE_FIELD(whereClause);
@@ -1694,7 +1695,7 @@ _outQuery(StringInfo str, Query *node)
appendStringInfo(str, " :utilityStmt <>");
WRITE_INT_FIELD(resultRelation);
WRITE_NODE_FIELD(into);
WRITE_NODE_FIELD(intoClause);
WRITE_BOOL_FIELD(hasAggs);
WRITE_BOOL_FIELD(hasSubLinks);
WRITE_NODE_FIELD(rtable);