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Allow ORDER BY, LIMIT in sub-selects. Fix most (not all) cases where

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the grammar did not allow redundant parentheses around sub-selects.
Distinguish LIMIT ALL from LIMIT 0; make the latter behave as one would
expect.
This commit is contained in:
Tom Lane
2000-11-05 00:15:54 +00:00
parent 66436e66e1
commit 11f7b29054
8 changed files with 400 additions and 230 deletions
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8
src/backend/utils/adt/ruleutils.c
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@ -3,7 +3,7 @@
* back to source text
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.67 2000/10/26 21:37:45 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/adt/ruleutils.c,v 1.68 2000/11/05 00:15:53 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@ -941,7 +941,11 @@ get_select_query_def(Query *query, deparse_context *context)
if (query->limitCount != NULL)
{
appendStringInfo(buf, " LIMIT ");
get_rule_expr(query->limitCount, context);
if (IsA(query->limitCount, Const) &&
((Const *) query->limitCount)->constisnull)
appendStringInfo(buf, "ALL");
else
get_rule_expr(query->limitCount, context);
}
}