add and amend comments for clarity

1 files changed, 2 insertions, 3 deletions

diff --git a/include/my_base.h b/include/my_base.h
index a26217f8050..4ce7a87105d 100644
--- a/include/my_base.h
+++ b/include/my_base.h
@@ -170,9 +170,8 @@ enum ha_extra_function {
   HA_EXTRA_DELETE_CANNOT_BATCH,
   HA_EXTRA_UPDATE_CANNOT_BATCH,
   /*
-    Inform handler that write_row() should immediately report constraint
-    violations because a INSERT...ON DUPLICATE KEY UPDATE is in being
-    performed.
+    Inform handler that an "INSERT...ON DUPLICATE KEY UPDATE" will be
+    executed. This condition is unset by HA_EXTRA_NO_IGNORE_DUP_KEY.
   */
   HA_EXTRA_INSERT_WITH_UPDATE
 };