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[SpecialNamespaces] namespace_names.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 `namespace_names` (
 `ns_id` INT(8) NOT NULL DEFAULT '0',
 `ns_name` VARCHAR(200) NOT NULL DEFAULT '',
 `ns_default` tinyint(1) NOT NULL DEFAULT '0',
 `ns_canonical` tinyint(1) DEFAULT NULL,
 PRIMARY KEY (`ns_name`) 
 ) ENGINE=InnoDB
 
Function: Wikimedia\Rdbms\Database::sourceFile( /workspace/src/extensions/SpecialNamespaces/namespace_names.sql )
Error: 1071 Specified key was too long; max key length is 767 bytes (localhost:/tmp/quibble-mysql-n27678zx/socket)

Event Timeline

hashar created this task.May 1 2018, 7:36 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 1 2018, 7:36 PM
Vvjjkkii renamed this task from [SpecialNamespaces] namespace_names.sql : Error: 1071 Specified key was too long; max key length is 767 bytes to rudaaaaaaa.Jul 1 2018, 1:12 AM
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Mainframe98 renamed this task from rudaaaaaaa to [SpecialNamespaces] namespace_names.sql : Error: 1071 Specified key was too long; max key length is 767 bytes.Jul 1 2018, 11:47 AM
Mainframe98 raised the priority of this task from High to Needs Triage.
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Ankry added a subscriber: Aklapper.Jul 2 2018, 3:20 PM