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* MDEV-21360 global debug_dbug pre-test value restoration issuesAlice Sherepa2020-01-151-2/+2
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* MDEV-21360 debug_dbug pre-test value restoration issuesAlice Sherepa2020-01-151-0/+2
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* fix a couple of dbug tests not to write to /tmpSergei Golubchik2016-04-191-2/+1
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* MDEV-6830: Server crashes in best_access_path after a sequence of SELECTs ...Sergey Petrunya2014-12-181-0/+49
generate_derived_keys_for_table() did not work correctly in the case where - it had a potential index on derived table - however, TABLE::check_tmp_key() would disallow creation of this index after looking at its future key parts (because of the key parts exceeding max. index length) - the code would leave a KEYUSE structure that refers to a non-existant index. Depending on further optimizer calculations, this could cause a crash.