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--source include/count_sessions.inc
CREATE TABLE t1 (
id INT PRIMARY KEY,
u CHAR(2) NOT NULL,
v CHAR(2) NOT NULL,
UNIQUE INDEX by_u_1 (u(1)),
INDEX by_v_1 (v(1))
);
INSERT INTO t1 VALUES (0,"aa","aa"),(10,"ee","ee"),(20,"oo","oo");
--connect (con1, localhost, root,,)
BEGIN;
# This query is supposed to place an S lock on (v="e",id=10) entry in secondary index
# without placing any lock on the (id=10) entry in the clustered index.
SELECT COUNT(*) FROM t1 FORCE INDEX ( by_v_1 ) WHERE v>"b" AND id<>10 FOR SHARE;
--connect (con2, localhost, root,,)
BEGIN;
# This query should try to insert a record to clustered index, then to by_u_1,
# notice the conflict there, and perform a partial rollback, in which it should
# first try to remove the record form by_u_1, realize there's nothing there to
# remove, then move on to removing a record from by_v_1, notice that the record
# for (v="e",id=10) already exists, attempt implicit to explicit lock conversion,
# and realize that it actually doesn't have an implicit lock on this record, as
# "ef" and "ee" both have the same prefix "e", so no change to by_v_1 was done.
--error ER_DUP_ENTRY
UPDATE t1 SET u="oo",v="ef" WHERE id=10;
ROLLBACK;
--connection default
--disconnect con1
--disconnect con2
DROP TABLE t1;
--source include/wait_until_count_sessions.inc
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