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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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8
src/backend/executor/spi.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.178 2007/04/16 18:21:07 tgl Exp $
* $PostgreSQL: pgsql/src/backend/executor/spi.c,v 1.179 2007/04/27 22:05:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1581,7 +1581,8 @@ _SPI_execute_plan(SPIPlanPtr plan, Datum *Values, const char *Nulls,
ActiveSnapshot->curcid = GetCurrentCommandId();
}
if (IsA(stmt, PlannedStmt))
if (IsA(stmt, PlannedStmt) &&
((PlannedStmt *) stmt)->utilityStmt == NULL)
{
qdesc = CreateQueryDesc((PlannedStmt *) stmt,
ActiveSnapshot,
@ -1687,7 +1688,8 @@ _SPI_pquery(QueryDesc *queryDesc, long tcount)
switch (operation)
{
case CMD_SELECT:
if (queryDesc->plannedstmt->into) /* select into table? */
Assert(queryDesc->plannedstmt->utilityStmt == NULL);
if (queryDesc->plannedstmt->intoClause) /* select into table? */
res = SPI_OK_SELINTO;
else if (queryDesc->dest->mydest != DestSPI)
{