Page MenuHomePhabricator

[BetaFeatures] sql/create_counts.sql : Error: 1071 Specified key was too long; max key length is 767 bytes
Open, Needs TriagePublic

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 `betafeatures_user_counts` (
 `feature`          varchar(255) primary key not null,
 `number`           integer not null default 0
 ) ENGINE=InnoDB

Function: Wikimedia\Rdbms\Database::sourceFile( /workspace/src/extensions/BetaFeatures/includes/../sql/create_counts.sql )
Error: 1071 Specified key was too long; max key length is 767 bytes (localhost:/tmp/quibble-mysql-hiiwttb5/socket)

Event Timeline

hashar created this task.May 1 2018, 7:11 PM
Vvjjkkii renamed this task from [BetaFeatures] sql/create_counts.sql : Error: 1071 Specified key was too long; max key length is 767 bytes to evdaaaaaaa.Jul 1 2018, 1:13 AM
Vvjjkkii triaged this task as High priority.
Vvjjkkii updated the task description. (Show Details)
Vvjjkkii removed a subscriber: gerritbot.
Mainframe98 renamed this task from evdaaaaaaa to [BetaFeatures] sql/create_counts.sql : Error: 1071 Specified key was too long; max key length is 767 bytes.Jul 1 2018, 10:53 AM
Mainframe98 raised the priority of this task from High to Needs Triage.
Mainframe98 updated the task description. (Show Details)
Mainframe98 added a subscriber: gerritbot.