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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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30
src/backend/utils/adt/ruleutils.c
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@ -2,7 +2,7 @@
* ruleutils.c - Functions to convert stored expressions/querytrees
* back to source text
*
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.220 2006/04/22 01:26:00 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/ruleutils.c,v 1.221 2006/04/30 18:30:40 tgl Exp $
**********************************************************************/
#include "postgres.h"
@ -1858,27 +1858,21 @@ get_select_query_def(Query *query, deparse_context *context,
get_rule_expr(query->limitCount, context, false);
}
/* Add the FOR UPDATE/SHARE clause if present */
if (query->rowMarks != NIL)
/* Add FOR UPDATE/SHARE clauses if present */
foreach(l, query->rowMarks)
{
if (query->forUpdate)
appendContextKeyword(context, " FOR UPDATE OF ",
RowMarkClause *rc = (RowMarkClause *) lfirst(l);
RangeTblEntry *rte = rt_fetch(rc->rti, query->rtable);
if (rc->forUpdate)
appendContextKeyword(context, " FOR UPDATE",
-PRETTYINDENT_STD, PRETTYINDENT_STD, 0);
else
appendContextKeyword(context, " FOR SHARE OF ",
appendContextKeyword(context, " FOR SHARE",
-PRETTYINDENT_STD, PRETTYINDENT_STD, 0);
sep = "";
foreach(l, query->rowMarks)
{
int rtindex = lfirst_int(l);
RangeTblEntry *rte = rt_fetch(rtindex, query->rtable);
appendStringInfo(buf, "%s%s",
sep,
quote_identifier(rte->eref->aliasname));
sep = ", ";
}
if (query->rowNoWait)
appendStringInfo(buf, " OF %s",
quote_identifier(rte->eref->aliasname));
if (rc->noWait)
appendStringInfo(buf, " NOWAIT");
}
}