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# ==== Purpose and Implementation ====
# Set binlog_group_commit_sync_delay to 1~9.
# case1) Have binlog_group_commit_sync_no_delay_count > 1, and the number of
# transaction commits less than binlog_group_commit_sync_no_delay_count, these
# commits should not hang forever if no more commits come in;
# case2) If binlog_group_commit_sync_no_delay_count = 0 transaction commits
# should not hang forever;
#
# ==== References ====
#
# Bug#22891628: BINARY GROUP COMMIT HANGS WHEN BINLOG_GROUP_COMMIT_SYNC_DELAY
# IS SET TO 1~9
#
###############################################################################
--source include/have_log_bin.inc

CREATE TABLE t(id INT PRIMARY KEY, v INT NOT NULL) ENGINE INNODB;

INSERT INTO t VALUES(1, 100), (2, 100), (3, 100), (4, 100);
--let $bgcd_saved=`SELECT @@GLOBAL.binlog_group_commit_sync_delay`
##################### begin of case 1 ######################
SET GLOBAL binlog_group_commit_sync_delay = 8;
SET GLOBAL binlog_group_commit_sync_no_delay_count = 2;

BEGIN;
UPDATE t set v = v + 100 WHERE id = 1;
COMMIT; # hangs here forever if no more commits come in

###################### end of case 1 #######################

##################### begin of case 2 ######################
SET GLOBAL binlog_group_commit_sync_delay = 8;
SET GLOBAL binlog_group_commit_sync_no_delay_count = 0;

BEGIN;
UPDATE t set v = v + 100 WHERE id = 3;
COMMIT; # hangs here forever

###################### end of case 2 #######################
--eval SET GLOBAL binlog_group_commit_sync_delay=$bgcd_saved
DROP TABLE t;