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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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21
src/backend/utils/fmgr/fmgr.c
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@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v 1.70 2003/06/25 21:30:32 momjian Exp $
* $Header: /cvsroot/pgsql/src/backend/utils/fmgr/fmgr.c,v 1.71 2003/06/29 00:33:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1651,6 +1651,7 @@ get_fn_expr_argtype(FunctionCallInfo fcinfo, int argnum)
{
Node *expr;
List *args;
Oid argtype;
/*
* can't return anything useful if we have no FmgrInfo or if
@@ -1665,11 +1666,27 @@ get_fn_expr_argtype(FunctionCallInfo fcinfo, int argnum)
args = ((FuncExpr *) expr)->args;
else if (IsA(expr, OpExpr))
args = ((OpExpr *) expr)->args;
else if (IsA(expr, DistinctExpr))
args = ((DistinctExpr *) expr)->args;
else if (IsA(expr, ScalarArrayOpExpr))
args = ((ScalarArrayOpExpr *) expr)->args;
else if (IsA(expr, NullIfExpr))
args = ((NullIfExpr *) expr)->args;
else
return InvalidOid;
if (argnum < 0 || argnum >= length(args))
return InvalidOid;
return exprType((Node *) nth(argnum, args));
argtype = exprType((Node *) nth(argnum, args));
/*
* special hack for ScalarArrayOpExpr: what the underlying function
* will actually get passed is the element type of the array.
*/
if (IsA(expr, ScalarArrayOpExpr) &&
argnum == 1)
argtype = get_element_type(argtype);
return argtype;
}