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MDEV-19092 Server crash when renaming the column when

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FOREIGN_KEY_CHECKS is disabled

- Referenced index can be null While renaming the referenced column name.
In that case, rename the referenced column name in dict_foreign_t and
find the equivalent referenced index.
This commit is contained in:
Thirunarayanan Balathandayuthapani
2020-05-04 13:42:38 +05:30
parent d233fd14a3
commit 2748c4993c
4 changed files with 101 additions and 14 deletions
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10
mysql-test/suite/innodb/r/foreign_key.result
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@@ -119,4 +119,14 @@ ALTER TABLE t1 ADD FOREIGN KEY (a) REFERENCES tx(x);
ALTER TABLE t1 DROP KEY idx;
ALTER TABLE t1 CHANGE a c INT;
DROP TABLE t1;
CREATE TABLE t1 (f1 INT, f2 INT, f3 INT, KEY idx(f1)) ENGINE=InnoDB;
ALTER TABLE t1 ADD FOREIGN KEY (f2) REFERENCES t1 (f1);
ALTER TABLE t1 ADD COLUMN f INT;
SET FOREIGN_KEY_CHECKS= OFF;
ALTER TABLE t1 DROP KEY idx;
ALTER TABLE t1 ADD KEY idx (f1);
SET FOREIGN_KEY_CHECKS= ON;
ALTER TABLE t1 DROP f3;
ALTER TABLE t1 CHANGE f f3 INT;
DROP TABLE t1;
SET FOREIGN_KEY_CHECKS=1;

13
mysql-test/suite/innodb/t/foreign_key.test
View File

@@ -144,4 +144,17 @@ ALTER TABLE t1 DROP KEY idx;
ALTER TABLE t1 CHANGE a c INT;
# Cleanup
DROP TABLE t1;
CREATE TABLE t1 (f1 INT, f2 INT, f3 INT, KEY idx(f1)) ENGINE=InnoDB;
ALTER TABLE t1 ADD FOREIGN KEY (f2) REFERENCES t1 (f1);
ALTER TABLE t1 ADD COLUMN f INT;
SET FOREIGN_KEY_CHECKS= OFF;
ALTER TABLE t1 DROP KEY idx;
ALTER TABLE t1 ADD KEY idx (f1);
SET FOREIGN_KEY_CHECKS= ON;
ALTER TABLE t1 DROP f3;
ALTER TABLE t1 CHANGE f f3 INT;
# Cleanup
DROP TABLE t1;
SET FOREIGN_KEY_CHECKS=1;