MDEV-18988 Wrong result when query with group by x order by y limit n (#1286)

storage/spider/mysql-test/spider/bugfix/include/group_by_order_by_limit_deinit.inc

+--let $MASTER_1_COMMENT_2_1= $MASTER_1_COMMENT_2_1_BACKUP
+--let $CHILD2_1_DROP_TABLES= $CHILD2_1_DROP_TABLES_BACKUP
+--let $CHILD2_1_CREATE_TABLES= $CHILD2_1_CREATE_TABLES_BACKUP
+--let $CHILD2_1_SELECT_TABLES= $CHILD2_1_SELECT_TABLES_BACKUP
+--let $CHILD2_2_DROP_TABLES= $CHILD2_2_DROP_TABLES_BACKUP
+--let $CHILD2_2_CREATE_TABLES= $CHILD2_2_CREATE_TABLES_BACKUP
+--let $CHILD2_2_SELECT_TABLES= $CHILD2_2_SELECT_TABLES_BACKUP
+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source ../t/test_deinit.inc
+--enable_result_log
+--enable_query_log
+--enable_warnings

storage/spider/mysql-test/spider/bugfix/include/group_by_order_by_limit_init.inc

+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source ../t/test_init.inc
+if (!$HAVE_PARTITION)
+{
+  --source group_by_order_by_limit_deinit.inc
+  --enable_result_log
+  --enable_query_log
+  --enable_warnings
+  skip Test requires partitioning;
+}
+--enable_result_log
+--enable_query_log
+--enable_warnings
+--let $MASTER_1_COMMENT_2_1_BACKUP= $MASTER_1_COMMENT_2_1
+let $MASTER_1_COMMENT_2_1=
+  COMMENT='table "tbl_a"'
+  PARTITION BY KEY(pkey) (
+    PARTITION pt1 COMMENT='srv "s_2_1"',
+    PARTITION pt2 COMMENT='srv "s_2_2"'
+  );
+--let $CHILD2_1_DROP_TABLES_BACKUP= $CHILD2_1_DROP_TABLES
+let $CHILD2_1_DROP_TABLES=
+  DROP TABLE IF EXISTS tbl_a;
+--let $CHILD2_1_CREATE_TABLES_BACKUP= $CHILD2_1_CREATE_TABLES
+let $CHILD2_1_CREATE_TABLES=
+  CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    PRIMARY KEY (pkey),
+    KEY idx1 (skey)
+  ) $CHILD2_1_ENGINE $CHILD2_1_CHARSET;
+--let $CHILD2_1_SELECT_TABLES_BACKUP= $CHILD2_1_SELECT_TABLES
+let $CHILD2_1_SELECT_TABLES=
+  SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+let $CHILD2_1_SELECT_ARGUMENT1=
+  SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';
+--let $CHILD2_2_DROP_TABLES_BACKUP= $CHILD2_2_DROP_TABLES
+let $CHILD2_2_DROP_TABLES=
+  DROP TABLE IF EXISTS tbl_a;
+--let $CHILD2_2_CREATE_TABLES_BACKUP= $CHILD2_2_CREATE_TABLES
+let $CHILD2_2_CREATE_TABLES=
+  CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    PRIMARY KEY (pkey),
+    KEY idx1 (skey)
+  ) $CHILD2_2_ENGINE $CHILD2_2_CHARSET;
+--let $CHILD2_2_SELECT_TABLES_BACKUP= $CHILD2_2_SELECT_TABLES
+let $CHILD2_2_SELECT_TABLES=
+  SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+let $CHILD2_2_SELECT_ARGUMENT1=
+  SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';

storage/spider/mysql-test/spider/bugfix/r/group_by_order_by_limit.result

+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+
+this test is for MDEV-16520
+
+drop and create databases
+connection master_1;
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+connection child2_1;
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+connection child2_2;
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote2;
+USE auto_test_remote2;
+
+create table and insert
+connection child2_1;
+CHILD2_1_CREATE_TABLES
+TRUNCATE TABLE mysql.general_log;
+connection child2_2;
+CHILD2_2_CREATE_TABLES
+TRUNCATE TABLE mysql.general_log;
+connection master_1;
+CREATE TABLE tbl_a (
+pkey int NOT NULL,
+skey int NOT NULL,
+PRIMARY KEY (pkey),
+KEY idx1 (skey)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1
+INSERT INTO tbl_a (pkey,skey) VALUES (0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO tbl_a (pkey,skey) VALUES (10,10),(11,11),(12,12),(13,13),(14,14),(15,15),(16,16),(17,17),(18,18),(19,19);
+INSERT INTO tbl_a (pkey,skey) VALUES (20,5),(21,6),(22,7),(23,8),(24,9),(25,10),(26,11),(27,12),(28,13),(29,14);
+
+select test 1
+connection child2_1;
+TRUNCATE TABLE mysql.general_log;
+connection child2_2;
+TRUNCATE TABLE mysql.general_log;
+connection master_1;
+SELECT skey, count(*) cnt FROM tbl_a GROUP BY skey ORDER BY cnt DESC, skey DESC LIMIT 5;
+skey	cnt
+14	2
+13	2
+12	2
+11	2
+10	2
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';
+argument
+select count(0),`skey` from `auto_test_remote`.`tbl_a` group by `skey` order by `skey`
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %'
+SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+pkey	skey
+1	1
+3	3
+5	5
+7	7
+9	9
+11	11
+13	13
+15	15
+17	17
+19	19
+21	6
+23	8
+25	10
+27	12
+29	14
+connection child2_2;
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';
+argument
+select count(0),`skey` from `auto_test_remote2`.`tbl_a` group by `skey` order by `skey`
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %'
+SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+pkey	skey
+0	0
+2	2
+4	4
+6	6
+8	8
+10	10
+12	12
+14	14
+16	16
+18	18
+20	5
+22	7
+24	9
+26	11
+28	13
+
+deinit
+connection master_1;
+DROP DATABASE IF EXISTS auto_test_local;
+connection child2_1;
+DROP DATABASE IF EXISTS auto_test_remote;
+SET GLOBAL log_output = @old_log_output;
+connection child2_2;
+DROP DATABASE IF EXISTS auto_test_remote2;
+SET GLOBAL log_output = @old_log_output;
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+
+end of test

storage/spider/mysql-test/spider/bugfix/t/group_by_order_by_limit.cnf

+!include include/default_mysqld.cnf
+!include ../my_1_1.cnf
+!include ../my_2_1.cnf
+!include ../my_2_2.cnf

storage/spider/mysql-test/spider/bugfix/t/group_by_order_by_limit.test

+--source ../include/group_by_order_by_limit_init.inc
+--echo
+--echo this test is for MDEV-16520
+--echo
+--echo drop and create databases
+--connection master_1
+--disable_warnings
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+
+--connection child2_1
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+
+--connection child2_2
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote2;
+USE auto_test_remote2;
+--enable_warnings
+
+--echo
+--echo create table and insert
+
+--connection child2_1
+--disable_query_log
+echo CHILD2_1_CREATE_TABLES;
+eval $CHILD2_1_CREATE_TABLES;
+--enable_query_log
+TRUNCATE TABLE mysql.general_log;
+
+--connection child2_2
+--disable_query_log
+echo CHILD2_2_CREATE_TABLES;
+eval $CHILD2_2_CREATE_TABLES;
+--enable_query_log
+TRUNCATE TABLE mysql.general_log;
+
+--connection master_1
+--disable_query_log
+echo CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    PRIMARY KEY (pkey),
+    KEY idx1 (skey)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1;
+eval CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    PRIMARY KEY (pkey),
+    KEY idx1 (skey)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET $MASTER_1_COMMENT_2_1;
+--enable_query_log
+INSERT INTO tbl_a (pkey,skey) VALUES (0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO tbl_a (pkey,skey) VALUES (10,10),(11,11),(12,12),(13,13),(14,14),(15,15),(16,16),(17,17),(18,18),(19,19);
+INSERT INTO tbl_a (pkey,skey) VALUES (20,5),(21,6),(22,7),(23,8),(24,9),(25,10),(26,11),(27,12),(28,13),(29,14);
+
+--echo
+--echo select test 1
+
+--connection child2_1
+TRUNCATE TABLE mysql.general_log;
+
+--connection child2_2
+TRUNCATE TABLE mysql.general_log;
+
+--connection master_1
+SELECT skey, count(*) cnt FROM tbl_a GROUP BY skey ORDER BY cnt DESC, skey DESC LIMIT 5;
+
+--connection child2_1
+eval $CHILD2_1_SELECT_ARGUMENT1;
+eval $CHILD2_1_SELECT_TABLES;
+
+--connection child2_2
+eval $CHILD2_2_SELECT_ARGUMENT1;
+eval $CHILD2_2_SELECT_TABLES;
+
+--echo
+--echo deinit
+--disable_warnings
+--connection master_1
+DROP DATABASE IF EXISTS auto_test_local;
+
+--connection child2_1
+DROP DATABASE IF EXISTS auto_test_remote;
+SET GLOBAL log_output = @old_log_output;
+
+--connection child2_2
+DROP DATABASE IF EXISTS auto_test_remote2;
+SET GLOBAL log_output = @old_log_output;
+
+--enable_warnings
+--source ../include/group_by_order_by_limit_deinit.inc
+--echo
+--echo end of test

storage/spider/mysql-test/spider/regression/e112122/include/group_by_order_by_limit_ok_deinit.inc

+--let $MASTER_1_COMMENT_2_1= $MASTER_1_COMMENT_2_1_BACKUP
+--let $CHILD2_1_DROP_TABLES= $CHILD2_1_DROP_TABLES_BACKUP
+--let $CHILD2_1_CREATE_TABLES= $CHILD2_1_CREATE_TABLES_BACKUP
+--let $CHILD2_1_SELECT_TABLES= $CHILD2_1_SELECT_TABLES_BACKUP
+--let $CHILD2_2_DROP_TABLES= $CHILD2_2_DROP_TABLES_BACKUP
+--let $CHILD2_2_CREATE_TABLES= $CHILD2_2_CREATE_TABLES_BACKUP
+--let $CHILD2_2_SELECT_TABLES= $CHILD2_2_SELECT_TABLES_BACKUP
+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source ../../t/test_deinit.inc
+--enable_result_log
+--enable_query_log
+--enable_warnings

storage/spider/mysql-test/spider/regression/e112122/include/group_by_order_by_limit_ok_init.inc

+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source ../../t/test_init.inc
+if (!$HAVE_PARTITION)
+{
+  --source group_by_order_by_limit_ok_deinit.inc
+  --enable_result_log
+  --enable_query_log
+  --enable_warnings
+  skip Test requires partitioning;
+}
+--enable_result_log
+--enable_query_log
+--enable_warnings
+--let $MASTER_1_COMMENT_2_1_BACKUP= $MASTER_1_COMMENT_2_1
+let $MASTER_1_COMMENT_2_1=
+  COMMENT='table "tbl_a"'
+  PARTITION BY KEY(skey) (
+    PARTITION pt1 COMMENT='srv "s_2_1"',
+    PARTITION pt2 COMMENT='srv "s_2_2"'
+  );
+--let $CHILD2_1_DROP_TABLES_BACKUP= $CHILD2_1_DROP_TABLES
+let $CHILD2_1_DROP_TABLES=
+  DROP TABLE IF EXISTS tbl_a;
+--let $CHILD2_1_CREATE_TABLES_BACKUP= $CHILD2_1_CREATE_TABLES
+let $CHILD2_1_CREATE_TABLES=
+  CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    KEY idx1 (pkey),
+    KEY idx2 (skey)
+  ) $CHILD2_1_ENGINE $CHILD2_1_CHARSET;
+--let $CHILD2_1_SELECT_TABLES_BACKUP= $CHILD2_1_SELECT_TABLES
+let $CHILD2_1_SELECT_TABLES=
+  SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+let $CHILD2_1_SELECT_ARGUMENT1=
+  SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';
+--let $CHILD2_2_DROP_TABLES_BACKUP= $CHILD2_2_DROP_TABLES
+let $CHILD2_2_DROP_TABLES=
+  DROP TABLE IF EXISTS tbl_a;
+--let $CHILD2_2_CREATE_TABLES_BACKUP= $CHILD2_2_CREATE_TABLES
+let $CHILD2_2_CREATE_TABLES=
+  CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    KEY idx1 (pkey),
+    KEY idx2 (skey)
+  ) $CHILD2_2_ENGINE $CHILD2_2_CHARSET;
+--let $CHILD2_2_SELECT_TABLES_BACKUP= $CHILD2_2_SELECT_TABLES
+let $CHILD2_2_SELECT_TABLES=
+  SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+let $CHILD2_2_SELECT_ARGUMENT1=
+  SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';

storage/spider/mysql-test/spider/regression/e112122/my.cnf

+!include include/default_mysqld.cnf
+!include my_1_1.cnf
+!include my_2_1.cnf
+!include my_2_2.cnf

storage/spider/mysql-test/spider/regression/e112122/my_1_1.cnf

+[mysqld.1.1]
+log-bin=                  master-bin
+loose_handlersocket_port=                20000
+loose_handlersocket_port_wr=             20001
+loose_handlersocket_threads=             2
+loose_handlersocket_threads_wr=          1
+loose_handlersocket_support_merge_table= 0
+loose_handlersocket_direct_update_mode=  2
+loose_handlersocket_unlimited_boundary=  65536
+loose_handlersocket_bulk_insert=         0
+loose_handlersocket_bulk_insert_timeout= 0
+loose_handlersocket_general_log=         1
+loose_handlersocket_timeout=             30
+loose_handlersocket_close_table_interval=2
+open_files_limit=                        4096
+loose_partition=                         1
+
+[ENV]
+USE_GEOMETRY_TEST=        1
+USE_FULLTEXT_TEST=        1
+USE_HA_TEST=              1
+USE_GENERAL_LOG=          1
+USE_REPLICATION=          1
+MASTER_1_MYPORT=          @mysqld.1.1.port
+MASTER_1_HSRPORT=         20000
+MASTER_1_HSWPORT=         20001
+MASTER_1_MYSOCK=          @mysqld.1.1.socket
+MASTER_1_ENGINE_TYPE=     Spider
+#MASTER_1_ENGINE_TYPE=     MyISAM
+MASTER_1_ENGINE=          ENGINE=Spider
+MASTER_1_CHARSET=         DEFAULT CHARSET=utf8
+MASTER_1_ENGINE2=         ENGINE=MyISAM
+MASTER_1_CHARSET2=        DEFAULT CHARSET=utf8
+MASTER_1_CHARSET3=        DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
+
+STR_SEMICOLON=            ;
+
+#The followings are set in include/init_xxx.inc files
+# MASTER_1_COMMENT_2_1
+# MASTER_1_COMMENT2_2_1
+# MASTER_1_COMMENT3_2_1
+# MASTER_1_COMMENT4_2_1
+# MASTER_1_COMMENT5_2_1
+# MASTER_1_COMMENT_P_2_1

storage/spider/mysql-test/spider/regression/e112122/my_2_1.cnf

+[mysqld.2.1]
+loose_handlersocket_port=                20002
+loose_handlersocket_port_wr=             20003
+loose_handlersocket_threads=             2
+loose_handlersocket_threads_wr=          1
+loose_handlersocket_support_merge_table= 0
+loose_handlersocket_direct_update_mode=  2
+loose_handlersocket_unlimited_boundary=  65536
+loose_handlersocket_bulk_insert=         0
+loose_handlersocket_bulk_insert_timeout= 0
+loose_handlersocket_general_log=         1
+loose_handlersocket_timeout=             30
+loose_handlersocket_close_table_interval=2
+open_files_limit=                        4096
+
+[ENV]
+USE_CHILD_GROUP2=         1
+OUTPUT_CHILD_GROUP2=      0
+CHILD2_1_MYPORT=          @mysqld.2.1.port
+CHILD2_1_HSRPORT=         20002
+CHILD2_1_HSWPORT=         20003
+CHILD2_1_MYSOCK=          @mysqld.2.1.socket
+CHILD2_1_ENGINE_TYPE=     InnoDB
+CHILD2_1_ENGINE=          ENGINE=InnoDB
+CHILD2_1_CHARSET=         DEFAULT CHARSET=utf8
+CHILD2_1_CHARSET2=        DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
+CHILD2_1_FT_MYPORT=       @mysqld.2.1.port
+CHILD2_1_FT_MYSOCK=       @mysqld.2.1.socket
+CHILD2_1_FT_ENGINE_TYPE=  MyISAM
+CHILD2_1_FT_ENGINE=       ENGINE=MyISAM
+CHILD2_1_FT_CHARSET=      DEFAULT CHARSET=utf8
+CHILD2_1_GM_MYPORT=       @mysqld.2.1.port
+CHILD2_1_GM_MYSOCK=       @mysqld.2.1.socket
+CHILD2_1_GM_ENGINE_TYPE=  MyISAM
+CHILD2_1_GM_ENGINE=       ENGINE=MyISAM
+CHILD2_1_GM_CHARSET=      DEFAULT CHARSET=utf8
+
+#The followings are set in include/init_xxx.inc files
+# CHILD2_1_DROP_TABLES
+# CHILD2_1_CREATE_TABLES
+# CHILD2_1_SELECT_TABLES
+# CHILD2_1_DROP_TABLES2
+# CHILD2_1_CREATE_TABLES2
+# CHILD2_1_SELECT_TABLES2
+# CHILD2_1_DROP_TABLES3
+# CHILD2_1_CREATE_TABLES3
+# CHILD2_1_SELECT_TABLES3
+# CHILD2_1_DROP_TABLES4
+# CHILD2_1_CREATE_TABLES4
+# CHILD2_1_SELECT_TABLES4
+# CHILD2_1_DROP_TABLES5
+# CHILD2_1_CREATE_TABLES5
+# CHILD2_1_SELECT_TABLES5
+# CHILD2_1_DROP_TABLES6
+# CHILD2_1_CREATE_TABLES6
+# CHILD2_1_SELECT_TABLES6

storage/spider/mysql-test/spider/regression/e112122/my_2_2.cnf

+[mysqld.2.2]
+loose_handlersocket_port=                20004
+loose_handlersocket_port_wr=             20005
+loose_handlersocket_threads=             2
+loose_handlersocket_threads_wr=          1
+loose_handlersocket_support_merge_table= 0
+loose_handlersocket_direct_update_mode=  2
+loose_handlersocket_unlimited_boundary=  65536
+loose_handlersocket_bulk_insert=         0
+loose_handlersocket_bulk_insert_timeout= 0
+loose_handlersocket_general_log=         1
+loose_handlersocket_timeout=             30
+loose_handlersocket_close_table_interval=2
+open_files_limit=                        4096
+
+[ENV]
+CHILD2_2_MYPORT=          @mysqld.2.2.port
+CHILD2_2_HSRPORT=         20004
+CHILD2_2_HSWPORT=         20005
+CHILD2_2_MYSOCK=          @mysqld.2.2.socket
+CHILD2_2_ENGINE_TYPE=     InnoDB
+CHILD2_2_ENGINE=          ENGINE=InnoDB
+CHILD2_2_CHARSET=         DEFAULT CHARSET=utf8
+CHILD2_2_FT_MYPORT=       @mysqld.2.2.port
+CHILD2_2_FT_MYSOCK=       @mysqld.2.2.socket
+CHILD2_2_FT_ENGINE_TYPE=  MyISAM
+CHILD2_2_FT_ENGINE=       ENGINE=MyISAM
+CHILD2_2_FT_CHARSET=      DEFAULT CHARSET=utf8
+CHILD2_2_GM_MYPORT=       @mysqld.2.2.port
+CHILD2_2_GM_MYSOCK=       @mysqld.2.2.socket
+CHILD2_2_GM_ENGINE_TYPE=  MyISAM
+CHILD2_2_GM_ENGINE=       ENGINE=MyISAM
+CHILD2_2_GM_CHARSET=      DEFAULT CHARSET=utf8
+
+#The followings are set in include/init_xxx.inc files
+# CHILD2_2_DROP_TABLES
+# CHILD2_2_CREATE_TABLES
+# CHILD2_2_SELECT_TABLES

storage/spider/mysql-test/spider/regression/e112122/r/group_by_order_by_limit_ok.result

+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+
+this test is for MDEV-18988
+
+drop and create databases
+connection master_1;
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+connection child2_1;
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+connection child2_2;
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote2;
+USE auto_test_remote2;
+
+create table and insert
+connection child2_1;
+CHILD2_1_CREATE_TABLES
+TRUNCATE TABLE mysql.general_log;
+connection child2_2;
+CHILD2_2_CREATE_TABLES
+TRUNCATE TABLE mysql.general_log;
+connection master_1;
+CREATE TABLE tbl_a (
+pkey int NOT NULL,
+skey int NOT NULL,
+KEY idx1 (pkey),
+KEY idx2 (skey)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1
+INSERT INTO tbl_a (pkey,skey) VALUES (0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO tbl_a (pkey,skey) VALUES (10,10),(11,11),(12,12),(13,13),(14,14),(15,15),(16,16),(17,17),(18,18),(19,19);
+INSERT INTO tbl_a (pkey,skey) VALUES (20,5),(21,6),(22,7),(23,8),(24,9),(25,10),(26,11),(27,12),(28,13),(29,14);
+
+select test 1
+connection child2_1;
+TRUNCATE TABLE mysql.general_log;
+connection child2_2;
+TRUNCATE TABLE mysql.general_log;
+connection master_1;
+SELECT skey, count(*) cnt FROM tbl_a GROUP BY skey ORDER BY cnt DESC, skey DESC LIMIT 5;
+skey	cnt
+14	2
+13	2
+12	2
+11	2
+10	2
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';
+argument
+select count(0),`skey` from `auto_test_remote`.`tbl_a` group by `skey` order by count(0) desc,`skey` desc limit 5
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %'
+SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+pkey	skey
+1	1
+3	3
+5	5
+7	7
+9	9
+11	11
+13	13
+15	15
+17	17
+19	19
+20	5
+22	7
+24	9
+26	11
+28	13
+connection child2_2;
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %';
+argument
+select count(0),`skey` from `auto_test_remote2`.`tbl_a` group by `skey` order by count(0) desc,`skey` desc limit 5
+SELECT argument FROM mysql.general_log WHERE argument LIKE '%select %'
+SELECT pkey, skey FROM tbl_a ORDER BY pkey;
+pkey	skey
+0	0
+2	2
+4	4
+6	6
+8	8
+10	10
+12	12
+14	14
+16	16
+18	18
+21	6
+23	8
+25	10
+27	12
+29	14
+
+deinit
+connection master_1;
+DROP DATABASE IF EXISTS auto_test_local;
+connection child2_1;
+DROP DATABASE IF EXISTS auto_test_remote;
+SET GLOBAL log_output = @old_log_output;
+connection child2_2;
+DROP DATABASE IF EXISTS auto_test_remote2;
+SET GLOBAL log_output = @old_log_output;
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+
+end of test

storage/spider/mysql-test/spider/regression/e112122/suite.opt

+--loose-innodb --loose-skip-performance-schema

storage/spider/mysql-test/spider/regression/e112122/suite.pm

+package My::Suite::Spider;
+
+@ISA = qw(My::Suite);
+
+return "No Spider engine" unless $ENV{HA_SPIDER_SO};
+return "Not run for embedded server" if $::opt_embedded_server;
+return "Test needs --big-test" unless $::opt_big_test;
+
+sub is_default { 1 }
+
+bless { };
+

storage/spider/mysql-test/spider/regression/e112122/t/group_by_order_by_limit_ok.test

+--source ../include/group_by_order_by_limit_ok_init.inc
+--echo
+--echo this test is for MDEV-18988
+--echo
+--echo drop and create databases
+--connection master_1
+--disable_warnings
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+
+--connection child2_1
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+
+--connection child2_2
+SET @old_log_output = @@global.log_output;
+SET GLOBAL log_output = 'TABLE,FILE';
+CREATE DATABASE auto_test_remote2;
+USE auto_test_remote2;
+--enable_warnings
+
+--echo
+--echo create table and insert
+
+--connection child2_1
+--disable_query_log
+echo CHILD2_1_CREATE_TABLES;
+eval $CHILD2_1_CREATE_TABLES;
+--enable_query_log
+TRUNCATE TABLE mysql.general_log;
+
+--connection child2_2
+--disable_query_log
+echo CHILD2_2_CREATE_TABLES;
+eval $CHILD2_2_CREATE_TABLES;
+--enable_query_log
+TRUNCATE TABLE mysql.general_log;
+
+--connection master_1
+--disable_query_log
+echo CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    KEY idx1 (pkey),
+    KEY idx2 (skey)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1;
+eval CREATE TABLE tbl_a (
+    pkey int NOT NULL,
+    skey int NOT NULL,
+    KEY idx1 (pkey),
+    KEY idx2 (skey)
+) $MASTER_1_ENGINE $MASTER_1_CHARSET $MASTER_1_COMMENT_2_1;
+--enable_query_log
+INSERT INTO tbl_a (pkey,skey) VALUES (0,0),(1,1),(2,2),(3,3),(4,4),(5,5),(6,6),(7,7),(8,8),(9,9);
+INSERT INTO tbl_a (pkey,skey) VALUES (10,10),(11,11),(12,12),(13,13),(14,14),(15,15),(16,16),(17,17),(18,18),(19,19);
+INSERT INTO tbl_a (pkey,skey) VALUES (20,5),(21,6),(22,7),(23,8),(24,9),(25,10),(26,11),(27,12),(28,13),(29,14);
+
+--echo
+--echo select test 1
+
+--connection child2_1
+TRUNCATE TABLE mysql.general_log;
+
+--connection child2_2
+TRUNCATE TABLE mysql.general_log;
+
+--connection master_1
+SELECT skey, count(*) cnt FROM tbl_a GROUP BY skey ORDER BY cnt DESC, skey DESC LIMIT 5;
+
+--connection child2_1
+eval $CHILD2_1_SELECT_ARGUMENT1;
+eval $CHILD2_1_SELECT_TABLES;
+
+--connection child2_2
+eval $CHILD2_2_SELECT_ARGUMENT1;
+eval $CHILD2_2_SELECT_TABLES;
+
+--echo
+--echo deinit
+--disable_warnings
+--connection master_1
+DROP DATABASE IF EXISTS auto_test_local;
+
+--connection child2_1
+DROP DATABASE IF EXISTS auto_test_remote;
+SET GLOBAL log_output = @old_log_output;
+
+--connection child2_2
+DROP DATABASE IF EXISTS auto_test_remote2;
+SET GLOBAL log_output = @old_log_output;
+
+--enable_warnings
+--source ../include/group_by_order_by_limit_ok_deinit.inc
+--echo
+--echo end of test

storage/spider/spd_table.cc

@@ -8909,6 +8909,13 @@ bool spider_check_direct_order_limit(
           break;
         }
       }
+      if (!spider_all_part_in_order((ORDER *) select_lex->group_list.first,
+        spider->get_table()))
+      {
+        DBUG_PRINT("info",("spider FALSE by group condition"));
+        first_check = FALSE;
+        spider->result_list.direct_distinct = FALSE;
+      }
 #endif
     }
 
@@ -8974,6 +8981,98 @@ bool spider_check_direct_order_limit(
   DBUG_RETURN(FALSE);
 }
 
+#ifdef HANDLER_HAS_DIRECT_AGGREGATE
+bool spider_all_part_in_order(
+  ORDER *order,
+  TABLE *table
+) {
+  TABLE_LIST *parent;
+  partition_info *part_info;
+  Field **part_fields;
+  ORDER *ptr;
+  Item *item;
+  Item_field *item_field;
+  DBUG_ENTER("spider_all_part_in_order");
+  while (TRUE)
+  {
+    DBUG_PRINT("info", ("spider table_name = %s", table->s->db.str));
+    DBUG_PRINT("info",("spider part_info=%p", table->part_info));
+    if ((part_info = table->part_info))
+    {
+      for (part_fields = part_info->full_part_field_array;
+        *part_fields; ++part_fields)
+      {
+        DBUG_PRINT("info", ("spider part_field = %s",
+          SPIDER_field_name_str(*part_fields)));
+        for (ptr = order; ptr; ptr = ptr->next)
+        {
+          item = *ptr->item;
+          if (item->type() != Item::FIELD_ITEM)
+          {
+            continue;
+          }
+          item_field = (Item_field *) item;
+          Field *field = item_field->field;
+          if (!field)
+          {
+            continue;
+          }
+          DBUG_PRINT("info", ("spider field_name = %s.%s",
+            field->table->s->db.str, SPIDER_field_name_str(field)));
+          if (*part_fields == spider_field_exchange(table->file, field))
+          {
+            break;
+          }
+        }
+        if (!ptr)
+        {
+          DBUG_RETURN(FALSE);
+        }
+      }
+    }
+    if (!(parent = table->pos_in_table_list->parent_l))
+    {
+      break;
+    }
+    table = parent->table;
+  }
+  DBUG_RETURN(TRUE);
+}
+
+Field *spider_field_exchange(
+  handler *handler,
+  Field *field
+) {
+  DBUG_ENTER("spider_field_exchange");
+#ifdef HA_CAN_BULK_ACCESS
+  if (handler->is_bulk_access_clone)
+  {
+    handler = handler->pt_clone_source_handler;
+  }
+#endif
+  DBUG_PRINT("info",("spider in field=%p", field));
+  DBUG_PRINT("info",("spider in field->table=%p", field->table));
+#ifdef HANDLER_HAS_TOP_TABLE_FIELDS
+  if (handler->set_top_table_fields)
+  {
+    DBUG_PRINT("info",("spider top_table=%p", handler->top_table));
+    if (field->table != handler->top_table)
+      DBUG_RETURN(NULL);
+    if (!(field = handler->top_table_field[field->field_index]))
+      DBUG_RETURN(NULL);
+  } else {
+#endif
+    DBUG_PRINT("info",("spider table=%p", handler->get_table()));
+    if (field->table != handler->get_table())
+      DBUG_RETURN(NULL);
+#ifdef HANDLER_HAS_TOP_TABLE_FIELDS
+  }
+#endif
+  DBUG_PRINT("info",("spider out field=%p", field));
+  DBUG_RETURN(field);
+}
+#endif
+
 int spider_set_direct_limit_offset(
   ha_spider *spider
 ) {

storage/spider/spd_table.h

-/* Copyright (C) 2008-2017 Kentoku Shiba
+/* Copyright (C) 2008-2019 Kentoku Shiba
+   Copyright (C) 2019 MariaDB corp
 
   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
@@ -638,6 +639,18 @@ bool spider_check_direct_order_limit(
   ha_spider *spider
 );
 
+#ifdef HANDLER_HAS_DIRECT_AGGREGATE
+bool spider_all_part_in_order(
+  ORDER *order,
+  TABLE *table
+);
+
+Field *spider_field_exchange(
+  handler *handler,
+  Field *field
+);
+#endif
+
 int spider_set_direct_limit_offset(
                                    ha_spider*		spider
                                    );