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[GlobalBlocking] globalblocking.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 UNIQUE INDEX gb_address ON `globalblocks` (gb_address, gb_anon_only)

Function: Wikimedia\Rdbms\Database::sourceFile( /workspace/src/extensions/GlobalBlocking/includes/../globalblocking.sql )
Error: 1071 Specified key was too long; max key length is 767 bytes (localhost:/tmp/quibble-mysql-kop6x54u/socket)

Event Timeline

hashar created this task.May 1 2018, 7:27 PM
Restricted Application added a subscriber: Aklapper. · View Herald TranscriptMay 1 2018, 7:27 PM
Vvjjkkii renamed this task from [GlobalBlocking] globalblocking.sql : Error: 1071 Specified key was too long; max key length is 767 bytes to 1udaaaaaaa.Jul 1 2018, 1:13 AM
Vvjjkkii triaged this task as High priority.
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Mainframe98 renamed this task from 1udaaaaaaa to [GlobalBlocking] globalblocking.sql : Error: 1071 Specified key was too long; max key length is 767 bytes.Jul 1 2018, 11:41 AM
Mainframe98 raised the priority of this task from High to Needs Triage.
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