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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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5
src/backend/parser/parse_clause.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/parser/parse_clause.c,v 1.131 2004/05/30 23:40:34 neilc Exp $
* $PostgreSQL: pgsql/src/backend/parser/parse_clause.c,v 1.132 2004/06/09 19:08:17 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -1122,8 +1122,7 @@ findTargetlistEntry(ParseState *pstate, Node *node, List **tlist, int clause)
*----------
*/
if (IsA(node, ColumnRef) &&
list_length(((ColumnRef *) node)->fields) == 1 &&
((ColumnRef *) node)->indirection == NIL)
list_length(((ColumnRef *) node)->fields) == 1)
{
char *name = strVal(linitial(((ColumnRef *) node)->fields));