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The problem is that select queries executed concurrently with a concurrent insert on a MyISAM table could be cached if the select started after the query cache invalidation but before the unlock of tables performed by the concurrent insert. This race could happen because the concurrent insert was failing to prevent cache of select queries happening at the same time. The solution is to add a 'uncacheable' status flag to signal that a concurrent insert is being performed on the table and that queries executing at the same time shouldn't cache the results. |
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| example | ||
| federated | ||
| heap | ||
| innobase | ||
| myisam | ||
| myisammrg | ||
| ndb | ||
| Makefile.am | ||