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Arrange for an explicit cast applied to an ARRAY[] constructor to be applied

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directly to all the member expressions, instead of the previous implementation
where the ARRAY[] constructor would infer a common element type and then we'd
coerce the finished array after the fact.  This has a number of benefits,
one being that we can allow an empty ARRAY[] construct so long as its
element type is specified by such a cast.

Brendan Jurd, minor fixes by me.
This commit is contained in:
Tom Lane
2008-03-20 21:42:48 +00:00
parent 8759b79d0f
commit 6b0706ac33
11 changed files with 312 additions and 100 deletions
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13
src/backend/nodes/equalfuncs.c
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@@ -18,7 +18,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.318 2008/02/07 20:19:47 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/equalfuncs.c,v 1.319 2008/03/20 21:42:48 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@@ -1729,6 +1729,14 @@ _equalA_Indirection(A_Indirection *a, A_Indirection *b)
return true;
}
static bool
_equalA_ArrayExpr(A_ArrayExpr *a, A_ArrayExpr *b)
{
COMPARE_NODE_FIELD(elements);
return true;
}
static bool
_equalResTarget(ResTarget *a, ResTarget *b)
{
@@ -2469,6 +2477,9 @@ equal(void *a, void *b)
case T_A_Indirection:
retval = _equalA_Indirection(a, b);
break;
case T_A_ArrayExpr:
retval = _equalA_ArrayExpr(a, b);
break;
case T_ResTarget:
retval = _equalResTarget(a, b);
break;