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-rw-r--r--innobase/include/trx0undo.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/innobase/include/trx0undo.h b/innobase/include/trx0undo.h
index 82c21f756e6..7f0378c68d3 100644
--- a/innobase/include/trx0undo.h
+++ b/innobase/include/trx0undo.h
@@ -341,7 +341,9 @@ struct trx_undo_struct{
have delete marked records, because of
a delete of a row or an update of an
indexed field; purge is then
- necessary. */
+ necessary; also TRUE if the transaction
+ has updated an externally stored
+ field */
dulint trx_id; /* id of the trx assigned to the undo
log */
ibool dict_operation; /* TRUE if a dict operation trx */