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Improve the representation of FOR UPDATE/FOR SHARE so that we can

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support both FOR UPDATE and FOR SHARE in one command, as well as both
NOWAIT and normal WAIT behavior.  The more general code is actually
simpler and cleaner.
This commit is contained in:
Tom Lane
2006-04-30 18:30:40 +00:00
parent 931bfc9664
commit 986085a7f0
29 changed files with 320 additions and 245 deletions
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10
src/backend/optimizer/prep/preptlist.c
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@@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/prep/preptlist.c,v 1.81 2006/04/05 22:11:55 tgl Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/prep/preptlist.c,v 1.82 2006/04/30 18:30:39 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -116,7 +116,7 @@ preprocess_targetlist(PlannerInfo *root, List *tlist)
* invalid. This is also checked at parse time, but that's
* insufficient because of rule substitution, query pullup, etc.
*/
CheckSelectLocking(parse, parse->forUpdate);
CheckSelectLocking(parse);
/*
* Currently the executor only supports FOR UPDATE/SHARE at top level
@@ -128,19 +128,19 @@ preprocess_targetlist(PlannerInfo *root, List *tlist)
foreach(l, parse->rowMarks)
{
Index rti = lfirst_int(l);
RowMarkClause *rc = (RowMarkClause *) lfirst(l);
Var *var;
char *resname;
TargetEntry *tle;
var = makeVar(rti,
var = makeVar(rc->rti,
SelfItemPointerAttributeNumber,
TIDOID,
-1,
0);
resname = (char *) palloc(32);
snprintf(resname, 32, "ctid%u", rti);
snprintf(resname, 32, "ctid%u", rc->rti);
tle = makeTargetEntry((Expr *) var,
list_length(tlist) + 1,