database/mariadb-columnstore-engine
1
0
Fork 0
mirror of https://github.com/mariadb-corporation/mariadb-columnstore-engine.git synced 2025-08-07 03:22:57 +03:00
Code Activity

MCOL-1052: Skeleton for group_by_handler for CS.

Browse Source
This commit is contained in:
Roman Nozdrin
2018-03-17 14:06:23 +03:00
parent 7075b9571d
commit e14b327a57
2 changed files with 39 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

20
dbcon/mysql/ha_calpont.cpp
View File

@@ -123,6 +123,9 @@ static int calpont_rollback(handlerton* hton, THD* thd, bool all);
static int calpont_close_connection ( handlerton* hton, THD* thd ); static int calpont_close_connection ( handlerton* hton, THD* thd );
handlerton* calpont_hton; handlerton* calpont_hton;
static group_by_handler *
create_calpont_group_by_handler(THD *thd, Query *query);
/* Variables for example share methods */ /* Variables for example share methods */
/* /*
@@ -218,6 +221,7 @@ static int columnstore_init_func(void* p)
calpont_hton->commit = calpont_commit; calpont_hton->commit = calpont_commit;
calpont_hton->rollback = calpont_rollback; calpont_hton->rollback = calpont_rollback;
calpont_hton->close_connection = calpont_close_connection; calpont_hton->close_connection = calpont_close_connection;
calpont_hton->create_group_by = create_calpont_group_by_handler;
DBUG_RETURN(0); DBUG_RETURN(0);
} }
@@ -1135,6 +1139,22 @@ static MYSQL_SYSVAR_ULONG(
0); 0);
#endif #endif
static group_by_handler *
create_calpont_group_by_handler(THD *thd, Query *query)
{
ha_calpont_group_by_handler *handler;
Item *item;
List_iterator_fast<Item> it(*query->select);
handler= new ha_calpont_group_by_handler(thd, query->select, query->from);
return handler;
}
int ha_calpont_group_by_handler::next_row()
{
return(0);
}
static struct st_mysql_sys_var* calpont_system_variables[] = static struct st_mysql_sys_var* calpont_system_variables[] =
{ {
// MYSQL_SYSVAR(enum_var), // MYSQL_SYSVAR(enum_var),

19
dbcon/mysql/ha_calpont.h
View File

@@ -40,6 +40,8 @@
#include <my_config.h> #include <my_config.h>
#include "idb_mysql.h" #include "idb_mysql.h"
extern handlerton* calpont_hton;
/** @brief /** @brief
EXAMPLE_SHARE is a structure that will be shared among all open handlers. EXAMPLE_SHARE is a structure that will be shared among all open handlers.
This example implements the minimum of what you will probably need. This example implements the minimum of what you will probably need.
@@ -245,5 +247,22 @@ public:
} }
}; };
class ha_calpont_group_by_handler: public group_by_handler
{
List<Item> *fields;
TABLE_LIST *table_list;
bool first_row;
public:
ha_calpont_group_by_handler(THD *thd_arg, List<Item> *fields_arg,
TABLE_LIST *table_list_arg)
: group_by_handler(thd_arg, calpont_hton), fields(fields_arg),
table_list(table_list_arg) {}
~ha_calpont_group_by_handler() {}
int init_scan() { first_row= true ; return 0; }
int next_row();
int end_scan() { return 0; }
};
#endif //HA_CALPONT_H__ #endif //HA_CALPONT_H__