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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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34
src/backend/parser/parse_expr.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.153 2003/06/27 17:04:53 tgl Exp $
* $Header: /cvsroot/pgsql/src/backend/parser/parse_expr.c,v 1.154 2003/06/29 00:33:43 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -300,6 +300,34 @@ transformExpr(ParseState *pstate, Node *expr)
makeList1(rexpr));
}
break;
case AEXPR_OP_ANY:
{
Node *lexpr = transformExpr(pstate,
a->lexpr);
Node *rexpr = transformExpr(pstate,
a->rexpr);
result = (Node *) make_scalar_array_op(pstate,
a->name,
true,
lexpr,
rexpr);
}
break;
case AEXPR_OP_ALL:
{
Node *lexpr = transformExpr(pstate,
a->lexpr);
Node *rexpr = transformExpr(pstate,
a->rexpr);
result = (Node *) make_scalar_array_op(pstate,
a->name,
false,
lexpr,
rexpr);
}
break;
case AEXPR_DISTINCT:
{
Node *lexpr = transformExpr(pstate,
@ -879,6 +907,7 @@ transformExpr(ParseState *pstate, Node *expr)
case T_FuncExpr:
case T_OpExpr:
case T_DistinctExpr:
case T_ScalarArrayOpExpr:
case T_NullIfExpr:
case T_BoolExpr:
case T_FieldSelect:
@ -1155,6 +1184,9 @@ exprType(Node *expr)
case T_DistinctExpr:
type = ((DistinctExpr *) expr)->opresulttype;
break;
case T_ScalarArrayOpExpr:
type = BOOLOID;
break;
case T_BoolExpr:
type = BOOLOID;
break;