Add C comment that txid_current() assigns an XID if one is not already

bmomjian · bmomjian · commit afc9635c600a · 2011-07-11T20:33:07.000-04:00
assigned.
diff --git a/src/backend/utils/adt/txid.c b/src/backend/utils/adt/txid.c
@@ -321,7 +321,8 @@ parse_snapshot(const char *str)
 /*
  * txid_current() returns int8
  *
- *		Return the current toplevel transaction ID as TXID
+ *	Return the current toplevel transaction ID as TXID
+ *	If the current transaction does not have one, one is assigned.
  */
 Datum
 txid_current(PG_FUNCTION_ARGS)
