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[TwitterLogin] schema/twitter_user.sql : Error: 1071 Specified key was too long; max key length is 767 bytes
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Description

When running MySQL/MariaDB with charset utf8mb4, a character is 4 bytes. Hence a key created on a VARCHAR(255) takes 255 characters * 4 bytes/characters = 1020 bytes. However Innodb defaults to a maximum of 767 bytes for an index.

The extension fails to install on Debian Stretch which uses utf8mb4 as the default charset:

Query: CREATE TABLE IF NOT EXISTS `twitter_user` (
 `tl_user_id` int(10) unsigned NOT NULL,
 `tl_twitter_id` varchar(255) NOT NULL,
 PRIMARY KEY  (`tl_user_id`),
 UNIQUE KEY `tl_twitter_id` (`tl_twitter_id`)
 )

Function: Wikimedia\Rdbms\Database::sourceFile( /workspace/src/extensions/TwitterLogin/schema/twitter_user.sql )
Error: 1071 Specified key was too long; max key length is 767 bytes (localhost:/tmp/quibble-mysql-sjvjl7fw/socket)

Event Timeline

hashar created this task.May 1 2018, 7:39 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 1 2018, 7:39 PM
Vvjjkkii renamed this task from [TwitterLogin] schema/twitter_user.sql : Error: 1071 Specified key was too long; max key length is 767 bytes to mudaaaaaaa.Jul 1 2018, 1:12 AM
Vvjjkkii triaged this task as High priority.
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Vvjjkkii removed a subscriber: Aklapper.
CommunityTechBot renamed this task from mudaaaaaaa to [TwitterLogin] schema/twitter_user.sql : Error: 1071 Specified key was too long; max key length is 767 bytes.Jul 1 2018, 10:02 AM
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CommunityTechBot added a subscriber: Aklapper.
CommunityTechBot raised the priority of this task from High to Needs Triage.Jul 3 2018, 1:55 AM