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Support expressions of the form 'scalar op ANY (array)' and

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'scalar op ALL (array)', where the operator is applied between the
lefthand scalar and each element of the array.  The operator must
yield boolean; the result of the construct is the OR or AND of the
per-element results, respectively.

Original coding by Joe Conway, after an idea of Peter's.  Rewritten
by Tom to keep the implementation strictly separate from subqueries.
This commit is contained in:
Tom Lane
2003-06-29 00:33:44 +00:00
parent df7618020b
commit bee217924d
28 changed files with 875 additions and 157 deletions
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30
src/backend/nodes/readfuncs.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.156 2003/06/25 21:30:30 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/nodes/readfuncs.c,v 1.157 2003/06/29 00:33:43 tgl Exp $
*
* NOTES
* Path and Plan nodes do not have any readfuncs support, because we
@@ -510,6 +510,32 @@ _readDistinctExpr(void)
READ_DONE();
}
/*
* _readScalarArrayOpExpr
*/
static ScalarArrayOpExpr *
_readScalarArrayOpExpr(void)
{
READ_LOCALS(ScalarArrayOpExpr);
READ_OID_FIELD(opno);
READ_OID_FIELD(opfuncid);
/*
* The opfuncid is stored in the textual format primarily for debugging
* and documentation reasons. We want to always read it as zero to force
* it to be re-looked-up in the pg_operator entry. This ensures that
* stored rules don't have hidden dependencies on operators' functions.
* (We don't currently support an ALTER OPERATOR command, but might
* someday.)
*/
local_node->opfuncid = InvalidOid;
READ_BOOL_FIELD(useOr);
READ_NODE_FIELD(args);
READ_DONE();
}
/*
* _readBoolExpr
*/
@@ -951,6 +977,8 @@ parseNodeString(void)
return_value = _readOpExpr();
else if (MATCH("DISTINCTEXPR", 12))
return_value = _readDistinctExpr();
else if (MATCH("SCALARARRAYOPEXPR", 17))
return_value = _readScalarArrayOpExpr();
else if (MATCH("BOOLEXPR", 8))
return_value = _readBoolExpr();
else if (MATCH("SUBLINK", 7))