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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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15
src/backend/nodes/outfuncs.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.235 2004/05/08 21:21:18 tgl Exp $
* $PostgreSQL: pgsql/src/backend/nodes/outfuncs.c,v 1.236 2004/05/10 22:44:44 tgl Exp $
*
* NOTES
* Every node type that can appear in stored rules' parsetrees *must*
@ -828,6 +828,16 @@ _outArrayExpr(StringInfo str, ArrayExpr *node)
WRITE_BOOL_FIELD(multidims);
}
static void
_outRowExpr(StringInfo str, RowExpr *node)
{
WRITE_NODE_TYPE("ROW");
WRITE_NODE_FIELD(args);
WRITE_OID_FIELD(row_typeid);
WRITE_ENUM_FIELD(row_format, CoercionForm);
}
static void
_outCoalesceExpr(StringInfo str, CoalesceExpr *node)
{
@ -1719,6 +1729,9 @@ _outNode(StringInfo str, void *obj)
case T_ArrayExpr:
_outArrayExpr(str, obj);
break;
case T_RowExpr:
_outRowExpr(str, obj);
break;
case T_CoalesceExpr:
_outCoalesceExpr(str, obj);
break;