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Promote row expressions to full-fledged citizens of the expression syntax,

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rather than allowing them only in a few special cases as before.  In
particular you can now pass a ROW() construct to a function that accepts
a rowtype parameter.  Internal generation of RowExprs fixes a number of
corner cases that used to not work very well, such as referencing the
whole-row result of a JOIN or subquery.  This represents a further step in
the work I started a month or so back to make rowtype values into
first-class citizens.
This commit is contained in:
Tom Lane
2004-05-10 22:44:49 +00:00
parent 9a939886ac
commit 2f63232d30
34 changed files with 1281 additions and 551 deletions
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20
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 1.280 2004/05/05 04:48:45 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/copyfuncs.c,v 1.281 2004/05/10 22:44:44 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -998,6 +998,21 @@ _copyArrayExpr(ArrayExpr *from)
return newnode;
}
/*
* _copyRowExpr
*/
static RowExpr *
_copyRowExpr(RowExpr *from)
{
RowExpr *newnode = makeNode(RowExpr);
COPY_NODE_FIELD(args);
COPY_SCALAR_FIELD(row_typeid);
COPY_SCALAR_FIELD(row_format);
return newnode;
}
/*
* _copyCoalesceExpr
*/
@ -2674,6 +2689,9 @@ copyObject(void *from)
case T_ArrayExpr:
retval = _copyArrayExpr(from);
break;
case T_RowExpr:
retval = _copyRowExpr(from);
break;
case T_CoalesceExpr:
retval = _copyCoalesceExpr(from);
break;