# Test for Bug 14006907 - FOREIGN KEY PROBLEMS AFTER DROP INDEX
--source include/have_debug_sync.inc

# Save the initial number of concurrent sessions.
--source include/count_sessions.inc

SET DEBUG_SYNC='RESET';
CREATE TABLE t1 (c1 INT PRIMARY KEY, c2 INT, INDEX(c2)) ENGINE = InnoDB;

CREATE TABLE t2 (
 c2 INT PRIMARY KEY,
 CONSTRAINT t2c2 FOREIGN KEY (c2) REFERENCES t1 (c2))
ENGINE = InnoDB;

--error ER_DROP_INDEX_FK
DROP INDEX c2 ON t1;

DROP TABLE t2;

SET DEBUG_SYNC = 'innodb_after_inplace_alter_table SIGNAL drop WAIT_FOR fk';
--send
DROP INDEX c2 ON t1;

--echo # Establish session con1 (user=root)
connect (con1,localhost,root,,);
--echo # Session con1
connection con1;

SET DEBUG_SYNC = 'now WAIT_FOR drop';
--send
CREATE TABLE t2 (
 c2 INT PRIMARY KEY,
 CONSTRAINT t2c2 FOREIGN KEY (c2) REFERENCES t1 (c2))
ENGINE = InnoDB;

--echo # Establish session con2 (user=root)
connect (con2,localhost,root,,);

--echo # After WL#6049 CREATE TABLE t2 must be blocked while trying
--echo # to acquire exclusive metadata lock on t1.
let $wait_condition=
  SELECT COUNT(*) = 1 FROM information_schema.processlist
  WHERE state = "Waiting for table metadata lock" AND
        info LIKE "CREATE TABLE t2 %";
--source include/wait_condition.inc

SET DEBUG_SYNC = 'now SIGNAL fk';
disconnect con2;

--echo # Switching to connection con1.
connection con1;

--echo # So no chance for CREATE TABLE t2 to sneak before DROP INDEX
--echo # is committed in and succeed.
--echo /* reap */ CREATE TABLE t2 ...
--error ER_FK_NO_INDEX_PARENT
--reap
disconnect con1;

--echo # Session default
connection default;
--echo /* reap */ DROP INDEX c2 ON t1;
reap;

--error ER_FK_NO_INDEX_PARENT
CREATE TABLE t2 (
 c2 INT PRIMARY KEY,
 CONSTRAINT t2c2 FOREIGN KEY (c2) REFERENCES t1 (c2))
ENGINE = InnoDB;

SET DEBUG_SYNC='RESET';
DROP TABLE t1;

# Check that all connections opened by test cases in this file are really
# gone so execution of other tests won't be affected by their presence.
--source include/wait_until_count_sessions.inc