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b7846a92dbWorks for the following simple case --disable_query_log --disable_result_log --source ../../t/test_init.inc --enable_result_log --enable_query_log set spider_same_server_link= 1; set spider_disable_select_handler= 0; evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root'); create table t2 (c int); create table t1 (c int) ENGINE=Spider COMMENT='WRAPPER "mysql", srv "srv",TABLE "t2"'; insert into t1 values (1), (2), (3); select c from t1; drop table t1, t2; drop server srv; --disable_query_log --disable_result_log --source ../../t/test_deinit.inc --enable_result_log --enable_query_log
68 lines
2 KiB
C++
68 lines
2 KiB
C++
/* Copyright (C) 2016 Kentoku Shiba
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02111-1301 USA */
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class spider_group_by_handler: public group_by_handler
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{
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Query query;
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spider_fields *fields;
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ha_spider *spider;
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SPIDER_TRX *trx;
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spider_db_result *result;
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bool first;
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longlong offset_limit;
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int store_error;
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/*
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Bitmap marking constant items among the select items. They are
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SELECTed in the query executed at the data node, but not stored in
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SPIDER_DB_ROW, because the temp table do not contain the
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corresponding fields.
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*/
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MY_BITMAP skips;
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public:
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spider_group_by_handler(
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THD *thd_arg,
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Query *query_arg,
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spider_fields *fields_arg,
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const MY_BITMAP &skips1
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);
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~spider_group_by_handler();
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int init_scan() override;
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int next_row() override;
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int end_scan() override;
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};
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group_by_handler *spider_create_group_by_handler(
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THD *thd,
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Query *query
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);
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/* TODO: move this somewhere else so that spider_select_handler does
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not depend on gbh */
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SPIDER_TABLE_HOLDER *spider_create_table_holder(
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uint table_count_arg
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);
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SPIDER_TABLE_HOLDER *spider_add_table_holder(
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ha_spider *spider_arg,
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SPIDER_TABLE_HOLDER *table_holder
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);
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int spider_make_query(const Query& query, spider_fields* fields,
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ha_spider *spider, TABLE *table);
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int spider_prepare_init_scan(
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const Query& query, MY_BITMAP *skips, spider_fields *fields, ha_spider *spider,
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SPIDER_TRX *trx, longlong& offset_limit, THD *thd);
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