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-rw-r--r--src/include/utils/rel.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/include/utils/rel.h b/src/include/utils/rel.h
index 0e6286ba201..d404c2adb51 100644
--- a/src/include/utils/rel.h
+++ b/src/include/utils/rel.h
@@ -159,7 +159,8 @@ typedef struct RelationData
* have the existing toast table's OID, not the OID of the transient toast
* table. If rd_toastoid isn't InvalidOid, it is the OID to place in
* toast pointers inserted into this rel. (Note it's set on the new
- * version of the main heap, not the toast table itself.)
+ * version of the main heap, not the toast table itself.) This also
+ * causes toast_save_datum() to try to preserve toast value OIDs.
*/
Oid rd_toastoid; /* Real TOAST table's OID, or InvalidOid */