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MDEV-18727 improve DML operation of System Versioning

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MDEV-18957 UPDATE with LIMIT clause is wrong for versioned partitioned tables

UPDATE, DELETE: replace linear search of current/historical records
with vers_setup_conds().

Additional DML cases in view.test
This commit is contained in:
Aleksey Midenkov
2019-11-22 14:29:03 +03:00
parent a14544260c
commit 0076dce2c8
19 changed files with 271 additions and 87 deletions
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10
sql/sql_derived.cc
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@ -689,7 +689,17 @@ bool mysql_derived_prepare(THD *thd, LEX *lex, TABLE_LIST *derived)
!(derived->is_multitable() &&
(thd->lex->sql_command == SQLCOM_UPDATE_MULTI ||
thd->lex->sql_command == SQLCOM_DELETE_MULTI))))
{
/*
System versioned tables may still require to get versioning conditions
(when updating view). See vers_setup_conds().
*/
if (!unit->prepared &&
derived->table->versioned() &&
(res= unit->prepare(derived, derived->derived_result, 0)))
goto exit;
DBUG_RETURN(FALSE);
}
/* prevent name resolving out of derived table */
for (SELECT_LEX *sl= first_select; sl; sl= sl->next_select())