Merge branch '10.3' into 10.4

mysql-test/suite/innodb/r/foreign_key.result

@@ -859,6 +859,20 @@ Error	1296	Got error 193 '`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`a`)
 DROP TABLE t1;
 FOUND 1 /InnoDB: Cannot delete/update rows with cascading foreign key constraints that exceed max depth of 15.*/ in mysqld.1.err
 # End of 10.2 tests
+#
+# MDEV-28980 InnoDB: Failing assertion: len <= MAX_TABLE_NAME_LEN
+#
+SET NAMES utf8;
+CREATE TABLE t (a INT PRIMARY KEY) ENGINE=InnoDB;
+CREATE DATABASE `db`;
+CREATE TABLE `db`.u (
+a INT PRIMARY KEY,
+CONSTRAINT `††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††`
+  FOREIGN KEY (a) REFERENCES test.t (a)) ENGINE=InnoDB;
+DROP TABLE `db`.u;
+DROP DATABASE `db`;
+DROP TABLE t;
+# End of 10.3 tests
 CREATE TABLE t1 (a GEOMETRY, INDEX(a(8)),
 FOREIGN KEY (a) REFERENCES x (xx)) ENGINE=InnoDB;
 ERROR HY000: Can't create table `test`.`t1` (errno: 150 "Foreign key constraint is incorrectly formed")

mysql-test/suite/innodb/r/foreign_key_not_windows.result

@@ -0,0 +1,16 @@
+#
+# MDEV-28980 InnoDB: Failing assertion: len <= MAX_TABLE_NAME_LEN
+#
+CREATE TABLE t (a INT PRIMARY KEY) ENGINE=InnoDB;
+CREATE DATABASE `d255`;
+CREATE TABLE `d255`.`d255`
+(a INT PRIMARY KEY, FOREIGN KEY(a) REFERENCES test.t(a)) ENGINE=InnoDB;
+ERROR HY000: Long database name and identifier for object resulted in path length exceeding 512 characters. Path: './@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023/@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@
+CREATE TABLE `d255`.`_##################################################`
+(a INT PRIMARY KEY, FOREIGN KEY(a) REFERENCES test.t(a)) ENGINE=InnoDB;
+ERROR HY000: Long database name and identifier for object resulted in path length exceeding 512 characters. Path: './@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023/_@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023@0023
+CREATE TABLE `d255`.`##################################################`
+(a INT PRIMARY KEY, FOREIGN KEY(a) REFERENCES test.t(a)) ENGINE=InnoDB;
+DROP DATABASE `d255`;
+DROP TABLE t;
+# End of 10.3 tests

mysql-test/suite/innodb/t/foreign_key.test

@@ -881,6 +881,35 @@ let SEARCH_PATTERN= InnoDB: Cannot delete/update rows with cascading foreign key
 
 --echo # End of 10.2 tests
 
+--echo #
+--echo # MDEV-28980 InnoDB: Failing assertion: len <= MAX_TABLE_NAME_LEN
+--echo #
+
+SET NAMES utf8;
+CREATE TABLE t (a INT PRIMARY KEY) ENGINE=InnoDB;
+# The maximum identifier length is 64 characters.
+# my_charset_filename will expand some characters to 5 characters,
+# e.g., # to @0023.
+# Many operating systems (such as Linux) or file systems
+# limit the path component length to 255 bytes, such as 51*5 characters.
+# The bug was repeated with a shorter length, which we will use here,
+# to avoid exceeding MAX_PATH on Microsoft Windows.
+let $db=##########################;
+--replace_result $db db
+eval CREATE DATABASE `$db`;
+--replace_result $db db
+eval CREATE TABLE `$db`.u (
+  a INT PRIMARY KEY,
+  CONSTRAINT `††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††††`
+  FOREIGN KEY (a) REFERENCES test.t (a)) ENGINE=InnoDB;
+--replace_result $db db
+eval DROP TABLE `$db`.u;
+--replace_result $db db
+eval DROP DATABASE `$db`;
+DROP TABLE t;
+
+--echo # End of 10.3 tests
+
 # MDEV-21792 Server aborts upon attempt to create foreign key on spatial field
 # Fail to create foreign key for spatial fields
 --error ER_CANT_CREATE_TABLE

mysql-test/suite/innodb/t/foreign_key_not_windows.test

@@ -0,0 +1,45 @@
+--source include/have_innodb.inc
+# On Microsoft Windows, there is an additional limit of MAX_PATH
+--source include/not_windows.inc
+# The embedded server prepends --datadir or --innodb-data-home-dir
+# to the path names, which reduces the maximum length of names further.
+--source include/not_embedded.inc
+
+--echo #
+--echo # MDEV-28980 InnoDB: Failing assertion: len <= MAX_TABLE_NAME_LEN
+--echo #
+
+# The main test is innodb.foreign_key. This is an additional test that
+# the maximum length cannot be exceeded for implicitly created
+# constraint names. On Microsoft Windows, MAX_PATH is a much stricter
+# limit than the 255-byte maximum path component length on many other systems,
+# including Linux and IBM AIX.
+
+CREATE TABLE t (a INT PRIMARY KEY) ENGINE=InnoDB;
+
+# The maximum identifier length is 64 characters.
+# my_charset_filename will expand some characters to 5 characters,
+# e.g., # to @0023.
+# Many operating systems (such as Linux) or file systems
+# limit the path component length to 255 bytes,
+# corresponding to the 51 characters below: 5*51=255.
+let $d255=###################################################;
+let $d250=##################################################;
+--replace_result $d255 d255
+eval CREATE DATABASE `$d255`;
+--replace_result $d255 d255
+--error ER_IDENT_CAUSES_TOO_LONG_PATH
+eval CREATE TABLE `$d255`.`$d255`
+(a INT PRIMARY KEY, FOREIGN KEY(a) REFERENCES test.t(a)) ENGINE=InnoDB;
+--replace_result $d255 d255
+--error ER_IDENT_CAUSES_TOO_LONG_PATH
+eval CREATE TABLE `$d255`.`_$d250`
+(a INT PRIMARY KEY, FOREIGN KEY(a) REFERENCES test.t(a)) ENGINE=InnoDB;
+--replace_result $d255 d255
+eval CREATE TABLE `$d255`.`$d250`
+(a INT PRIMARY KEY, FOREIGN KEY(a) REFERENCES test.t(a)) ENGINE=InnoDB;
+--replace_result $d255 d255
+eval DROP DATABASE `$d255`;
+DROP TABLE t;
+
+--echo # End of 10.3 tests