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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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15
src/backend/nodes/copyfuncs.c
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@ -15,7 +15,7 @@
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.388 2008/02/07 20:19:47 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.389 2008/03/20 21:42:47 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1684,6 +1684,16 @@ _copyA_Indirection(A_Indirection *from)
return newnode;
}
static A_ArrayExpr *
_copyA_ArrayExpr(A_ArrayExpr *from)
{
A_ArrayExpr *newnode = makeNode(A_ArrayExpr);
COPY_NODE_FIELD(elements);
return newnode;
}
static ResTarget *
_copyResTarget(ResTarget *from)
{
@ -3543,6 +3553,9 @@ copyObject(void *from)
case T_A_Indirection:
retval = _copyA_Indirection(from);
break;
case T_A_ArrayExpr:
retval = _copyA_ArrayExpr(from);
break;
case T_ResTarget:
retval = _copyResTarget(from);
break;