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Diffstat (limited to 'src/backend/commands/tablecmds.c')
| -rw-r--r-- | src/backend/commands/tablecmds.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c index 05593f33162..ba8f4459f3d 100644 --- a/src/backend/commands/tablecmds.c +++ b/src/backend/commands/tablecmds.c @@ -4890,6 +4890,16 @@ ATRewriteTable(AlteredTableInfo *tab, Oid OIDNewHeap, LOCKMODE lockmode) table_slot_callbacks(oldrel)); newslot = MakeSingleTupleTableSlot(newTupDesc, table_slot_callbacks(newrel)); + + /* + * Set all columns in the new slot to NULL initially, to ensure + * columns added as part of the rewrite are initialized to + * NULL. That is necessary as tab->newvals will not contain an + * expression for columns with a NULL default, e.g. when adding a + * column without a default together with a column with a default + * requiring an actual rewrite. + */ + ExecStoreAllNullTuple(newslot); } else { |