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Implemented condition pushdown into derived tables / views

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with window functions (mdev-10855).

This patch just modified the function pushdown_cond_for_derived()
to support this feature.
Some test cases demonstrating this optimization were added to
derived_cond_pushdown.test.
This commit is contained in:
Igor Babaev
2017-08-12 19:58:16 -07:00
parent c9981fbee2
commit 61bbabb202
6 changed files with 584 additions and 14 deletions
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10
sql/sql_select.h
View File

@ -1409,6 +1409,11 @@ public:
bool set_group_rpa;
/** Exec time only: TRUE <=> current group has been sent */
bool group_sent;
/**
TRUE if the query contains an aggregate function but has no GROUP
BY clause.
*/
bool implicit_grouping;
bool is_for_splittable_grouping_derived;
bool with_two_phase_optimization;
@ -1701,11 +1706,6 @@ private:
*/
void optimize_distinct();
/**
TRUE if the query contains an aggregate function but has no GROUP
BY clause.
*/
bool implicit_grouping;
void cleanup_item_list(List<Item> &items) const;
bool make_aggr_tables_info();