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/* Copyright (C) 2016 Kentoku Shiba
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
class spider_group_by_handler: public group_by_handler
{
Query query;
spider_fields *fields;
ha_spider *spider;
SPIDER_TRX *trx;
spider_db_result *result;
bool first;
longlong offset_limit;
int store_error;
/*
Bitmap marking constant items among the select items. They are
SELECTed in the query executed at the data node, but not stored in
SPIDER_DB_ROW, because the temp table do not contain the
corresponding fields.
*/
MY_BITMAP skips;
public:
spider_group_by_handler(
THD *thd_arg,
Query *query_arg,
spider_fields *fields_arg,
const MY_BITMAP &skips1
);
~spider_group_by_handler();
int init_scan() override;
int next_row() override;
int end_scan() override;
};
group_by_handler *spider_create_group_by_handler(
THD *thd,
Query *query
);
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