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-rw-r--r--sql/handler.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/sql/handler.h b/sql/handler.h
index 325df003215..0e03ea17dde 100644
--- a/sql/handler.h
+++ b/sql/handler.h
@@ -174,6 +174,8 @@
/*
These bits are set if different kinds of indexes can be created
off-line without re-create of the table (but with a table lock).
+ Partitioning needs both ADD and DROP to be supported by its underlying
+ handlers, due to error handling, see bug#57778.
*/
#define HA_ONLINE_ADD_INDEX_NO_WRITES (1L << 0) /*add index w/lock*/
#define HA_ONLINE_DROP_INDEX_NO_WRITES (1L << 1) /*drop index w/lock*/