Bug#28573894 ALTER PARTITIONED TABLE ADD AUTO_INCREMENT DIFF RESULT DEPENDING ON ALGORITHM

For partitioned table, ensure that the AUTO_INCREMENT values will
be assigned from the same sequence. This is based on the following
change in MySQL 5.6.44:

commit aaba359c13d9200747a609730dafafc3b63cd4d6
Author: Rahul Malik <rahul.m.malik@oracle.com>
Date:   Mon Feb 4 13:31:41 2019 +0530

    Bug#28573894 ALTER PARTITIONED TABLE ADD AUTO_INCREMENT DIFF RESULT DEPENDING ON ALGORITHM

    Problem:
    When a partition table is in-place altered to add an auto-increment column,
    then its values are starting over for each partition.

    Analysis:
    In the case of in-place alter, InnoDB is creating a new sequence object
    for each partition. It is default initialized. So auto-increment columns
    start over for each partition.

    Fix:
    Assign old sequence of the partition to the sequence of next partition
    so it won't start over.

    RB#21148
    Reviewed by Bin Su <bin.x.su@oracle.com>

1 files changed, 42 insertions, 0 deletions

diff --git a/mysql-test/r/partition_innodb.result b/mysql-test/r/partition_innodb.result
index c00a75fed90..5deab4d84fc 100644
--- a/mysql-test/r/partition_innodb.result
+++ b/mysql-test/r/partition_innodb.result
@@ -918,3 +918,45 @@ ERROR HY000: CHECK OPTION failed 'test.v'
 SET GLOBAL innodb_stats_persistent= @save_isp;
 DROP view v;
 DROP TABLE t;
+#
+# Bug#28573894 ALTER PARTITIONED TABLE ADD AUTO_INCREMENT DIFF RESULT
+#
+CREATE TABLE t (a VARCHAR(10) NOT NULL,b INT,PRIMARY KEY (b)) ENGINE=INNODB
+PARTITION BY RANGE (b)
+(PARTITION pa VALUES LESS THAN (2),
+PARTITION pb VALUES LESS THAN (20),
+PARTITION pc VALUES LESS THAN (30),
+PARTITION pd VALUES LESS THAN (40));
+INSERT INTO t
+VALUES('A',0),('B',1),('C',2),('D',3),('E',4),('F',5),('G',25),('H',35);
+CREATE TABLE t_copy LIKE t;
+INSERT INTO t_copy SELECT * FROM t;
+ALTER TABLE t ADD COLUMN r INT UNSIGNED NOT NULL AUTO_INCREMENT,
+ADD UNIQUE KEY (r,b);
+affected rows: 0
+info: Records: 0  Duplicates: 0  Warnings: 0
+ALTER TABLE t_copy ADD COLUMN r INT UNSIGNED NOT NULL AUTO_INCREMENT,
+ADD UNIQUE KEY (r,b), ALGORITHM=COPY;
+affected rows: 8
+info: Records: 8  Duplicates: 0  Warnings: 0
+SELECT * FROM t;
+a	b	r
+A	0	1
+B	1	2
+C	2	3
+D	3	4
+E	4	5
+F	5	6
+G	25	7
+H	35	8
+SELECT * FROM t_copy;
+a	b	r
+A	0	1
+B	1	2
+C	2	3
+D	3	4
+E	4	5
+F	5	6
+G	25	7
+H	35	8
+DROP TABLE t,t_copy;