diff options
| -rw-r--r-- | storage/innobase/handler/handler0alter.cc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/storage/innobase/handler/handler0alter.cc b/storage/innobase/handler/handler0alter.cc index fbb640e7c62..35d37def5cf 100644 --- a/storage/innobase/handler/handler0alter.cc +++ b/storage/innobase/handler/handler0alter.cc @@ -5847,7 +5847,12 @@ static bool innobase_instant_try( const dict_col_t* old_cols = user_table->cols; DBUG_ASSERT(user_table->n_cols == ctx->old_n_cols); + /* Acquire the ahi latch to avoid the race condition + between ahi access and instant alter table */ + srw_spin_lock *ahi_latch = btr_search_sys.get_latch(*index); + ahi_latch->wr_lock(SRW_LOCK_CALL); const bool metadata_changed = ctx->instant_column(); + ahi_latch->wr_unlock(); DBUG_ASSERT(index->n_fields >= n_old_fields); /* The table may have been emptied and may have lost its |