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move internal API out from group_by_handler

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into a Pushdown_query object
This commit is contained in:
Sergei Golubchik
2015-10-02 10:19:40 +02:00
parent 9ca3d9ea9c
commit 7ca8b4bbfa
6 changed files with 64 additions and 66 deletions
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21
sql/sql_select.h
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@ -884,6 +884,7 @@ public:
JOIN_TAB *end;
};
class Pushdown_query;
class JOIN :public Sql_alloc
{
@ -1088,7 +1089,7 @@ public:
/* points to a storage engine if all tables comes from the storage engine */
handlerton *one_storage_engine;
group_by_handler *storage_handler_for_group_by;
Pushdown_query *pushdown_query;
JOIN_TAB *original_join_tab;
uint original_table_count;
@ -1391,7 +1392,7 @@ public:
no_rows_in_result_called= 0;
positions= best_positions= 0;
one_storage_engine= 0;
storage_handler_for_group_by= 0;
pushdown_query= 0;
original_join_tab= 0;
do_select_call_count= 0;
@ -1964,5 +1965,21 @@ ulong check_selectivity(THD *thd,
TABLE *table,
List<COND_STATISTIC> *conds);
class Pushdown_query: public Sql_alloc
{
public:
SELECT_LEX *select_lex;
bool store_data_in_temp_table;
group_by_handler *handler;
Pushdown_query(SELECT_LEX *select_lex_arg, group_by_handler *handler_arg)
: select_lex(select_lex_arg), store_data_in_temp_table(0),
handler(handler_arg) {}
~Pushdown_query() { delete handler; }
/* Function that calls the above scan functions */
int execute(JOIN *join);
};
#endif /* SQL_SELECT_INCLUDED */