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Instead of supposing (wrongly, in the general case) that the rowtype

of an inheritance child table is binary-compatible with the rowtype of
its parent, invent an expression node type that does the conversion
correctly.  Fixes the new bug exhibited by Kris Shannon as well as a
lot of old bugs that would only show up when using multiple inheritance
or after altering the parent table.
This commit is contained in:
Tom Lane
2004-12-11 23:26:51 +00:00
parent fd536dd257
commit 12b1b5d837
15 changed files with 356 additions and 71 deletions

View File

@ -16,7 +16,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.23 2004/08/29 05:06:44 momjian Exp $
* $PostgreSQL: pgsql/src/backend/optimizer/prep/prepjointree.c,v 1.24 2004/12/11 23:26:37 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -839,6 +839,13 @@ find_nonnullable_rels(Node *node, bool top_level)
result = find_nonnullable_rels((Node *) expr->arg, top_level);
}
else if (IsA(node, ConvertRowtypeExpr))
{
/* not clear this is useful, but it can't hurt */
ConvertRowtypeExpr *expr = (ConvertRowtypeExpr *) node;
result = find_nonnullable_rels((Node *) expr->arg, top_level);
}
else if (IsA(node, NullTest))
{
NullTest *expr = (NullTest *) node;