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feat(joblist): MCOL-5756 MCOL-5222 ORDER BY on UNIONs in outer select

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This commit is contained in:
Aleksei Antipovskii
2025-08-26 02:44:56 +02:00
committed by Leonid Fedorov
parent ebde9b5648
commit 3a316181e7
10 changed files with 334 additions and 93 deletions
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17
dbcon/mysql/ha_mcs_pushdown.cpp
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@@ -633,15 +633,6 @@ select_handler* create_columnstore_select_handler_(THD* thd, SELECT_LEX* sel_lex
return nullptr;
}
// MCOL-5432 Disable partial pushdown of the UNION operation if the query
// involves an order by or a limit clause.
if (sel_lex && sel_unit &&
(sel_unit->global_parameters()->limit_params.explicit_limit == true ||
sel_unit->global_parameters()->order_list.elements != 0))
{
return nullptr;
}
std::vector<SELECT_LEX*> select_lex_vec;
if (sel_unit && !sel_lex)
@@ -912,14 +903,6 @@ select_handler* create_columnstore_unit_handler(THD* thd, SELECT_LEX_UNIT* sel_u
return nullptr;
}
// MCOL-5432 Disable UNION pushdown if the query involves an order by
// or a limit clause.
if (sel_unit->global_parameters()->limit_params.explicit_limit == true ||
sel_unit->global_parameters()->order_list.elements != 0)
{
return nullptr;
}
return create_columnstore_select_handler_(thd, 0, sel_unit);
}