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| author | Sergey Vojtovich <svoj@mariadb.org> | 2019-03-07 13:43:53 +0400 |
|---|---|---|
| committer | Sergey Vojtovich <svoj@mariadb.org> | 2019-03-11 22:46:12 +0400 |
| commit | 149b75476837fb96c28739d5368e977e39fd671b (patch) | |
| tree | bcd2f7f80870032d0e3fcff82b472f4a7a3537f8 /plugin/server_audit/server_audit.c | |
| parent | 0a0eed80164dac0d3bfb7dcc57eb416cfba89386 (diff) | |
| download | mariadb-git-149b75476837fb96c28739d5368e977e39fd671b.tar.gz | |
MDEV-17595 - ALTER TABLE ADD FOREIGN KEY crash
ALTER TABLE ... ADD FOREIGN KEY may trigger assertion failure when
it has LOCK=EXCLUSIVE clause or concurrent FLUSH TABLES is being
executed.
In both cases being altered table is marked as flushed, which forces
subsequent attempt to open parent table to re-open. Which in turn is
not allowed while transaction is running.
Rather than opening parent table, just take appropriate MDL lock.
Also removed table_already_fk_prelocked() check: MDL itself has much
better methods to handle duplicate locks. E.g. the former won't acquire
MDL_SHARED_NO_WRITE if it already has MDL_SHARED_READ.
Diffstat (limited to 'plugin/server_audit/server_audit.c')
0 files changed, 0 insertions, 0 deletions