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Support assignment to subfields of composite columns in UPDATE and INSERT.

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As a side effect, cause subscripts in INSERT targetlists to do something
more or less sensible; previously we evaluated such subscripts and then
effectively ignored them.  Another side effect is that UPDATE-ing an
element or slice of an array value that is NULL now produces a non-null
result, namely an array containing just the assigned-to positions.
This commit is contained in:
Tom Lane
2004-06-09 19:08:20 +00:00
parent 3a0df651da
commit 7e64dbc6b5
27 changed files with 1468 additions and 574 deletions
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14
src/pl/plpgsql/src/pl_exec.c
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@@ -3,7 +3,7 @@
* procedural language
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.106 2004/06/06 00:41:28 tgl Exp $
* $PostgreSQL: pgsql/src/pl/plpgsql/src/pl_exec.c,v 1.107 2004/06/09 19:08:19 tgl Exp $
*
* This software is copyrighted by Jan Wieck - Hamburg.
*
@@ -3852,6 +3852,18 @@ exec_simple_check_node(Node *node)
case T_FieldSelect:
return exec_simple_check_node((Node *) ((FieldSelect *) node)->arg);
case T_FieldStore:
{
FieldStore *expr = (FieldStore *) node;
if (!exec_simple_check_node((Node *) expr->arg))
return FALSE;
if (!exec_simple_check_node((Node *) expr->newvals))
return FALSE;
return TRUE;
}
case T_RelabelType:
return exec_simple_check_node((Node *) ((RelabelType *) node)->arg);