#
# Test for bug #26654685 "INDEX->ID == BTR_PAGE_GET_INDEX_ID(PAGE) AT
#                         BTR_CUR_SEARCH_TO_NTH_LEVEL IN BTR/B".
#
CREATE TABLE parent (a INT PRIMARY KEY, b INT NOT NULL) ENGINE = InnoDB;
INSERT INTO parent VALUES(1,2),(2,2);
CREATE TABLE child (a INT PRIMARY KEY, b INT NOT NULL) ENGINE = InnoDB;
INSERT INTO child VALUES (10, 2);
SET DEBUG_SYNC = 'innodb_inplace_alter_table_enter SIGNAL start_create WAIT_FOR go_ahead';
CREATE UNIQUE INDEX idx ON parent(b);;
connect  con1,localhost,root,,;
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR start_create';
INSERT INTO parent VALUES(4, 2);
SET DEBUG_SYNC = 'now SIGNAL go_ahead';
connection default;
ERROR 23000: Duplicate entry '2' for key 'parent.idx'
SET DEBUG_SYNC = 'now SIGNAL conn_add_fk';
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR conn_add_fk';
ALTER TABLE child ADD CONSTRAINT cfx FOREIGN KEY (b) REFERENCES parent(b);
ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 'cfx' in the referenced table 'parent'
SET DEBUG_SYNC = 'RESET';
connection default;
DROP TABLE child;
DROP TABLE parent;
connection con1;
disconnect con1;
connection default;
#
# Test case for bug#26655360 "ASSERTION FAILURE: DICT0DICT.CC:2045
#                             :TABLE->N_REC_LOCKS == 0".
CREATE TABLE parent (a INT PRIMARY KEY, b INT NOT NULL) ENGINE = InnoDB;
CREATE INDEX idx on parent(b);
INSERT INTO parent VALUES(1,2),(2,2);
CREATE TABLE child (a INT PRIMARY KEY, b INT NOT NULL) ENGINE = InnoDB;
INSERT INTO child VALUES (10, 3);
SET DEBUG_SYNC = "innodb_ddl_log_before_enter SIGNAL start_create WAIT_FOR go_ahead";
ALTER TABLE child ADD CONSTRAINT idx17 FOREIGN KEY (b) REFERENCES parent(a);
# Make table lock _count > 1
connect  con1,localhost,root,,;
connection con1;
SET DEBUG_SYNC = 'now WAIT_FOR start_create';
START TRANSACTION;
DELETE FROM parent WHERE a=1;;
connect  con2,localhost,root,,;
# Wait until DELETE is blocked due to MDL on the parent.
SET DEBUG_SYNC = 'now SIGNAL go_ahead';
disconnect con2;
connection default;
ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`#sql-xxxxx
connection con1;
COMMIT;
disconnect con1;
connection default;
SET DEBUG_SYNC = 'RESET';
DROP TABLE child;
DROP TABLE parent;