Aleksey Midenkov 498a96a478 MDEV-20441 ER_CRASHED_ON_USAGE upon update on versioned Aria table ...

Turn read cache off for update and multi-update for versioned
table. no_cache is reinited on each TABLE open because it is
applicable for specific algorithms.

As a side fix vers_insert_history_row() honors vers_write setting.

Aria with row_format=fixed uses IO_CACHE of type READ_CACHE for
sequential read in update loop. When history row is inserted inside
this loop the cache misses it and fails with error.

TODO:

Currently maria_extra() does not support SEQ_READ_APPEND. Probably it
might be possible to use this type of cache.

2019-12-02 11:48:37 +03:00

158 KiB

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