Bug #82080

Indexes too large for some tables with utf8mb4

Added by Tobias Hüske 12 months ago. Updated about 1 month ago.

Status:
New
Priority:
Must have
Assignee:
-
Category:
Install Tool
Target version:
-
Start date:
2017-08-11
Due date:
% Done:

0%

TYPO3 Version:
8
PHP Version:
Tags:
Complexity:
Is Regression:
Sprint Focus:

Description

Hey,

after performing an update from an clean TYPO3 7.6.21 to 8.7.4 (maybe also when installing a clean 8.7.4) the Database Analyzer shows the following error:

Specified key was too long; max key length is 3072 bytes.

The query "CREATE INDEX `getDomainStartPage` ON `sys_domain` (pid, hidden, domainName)" fails, because domainName has varchar(80).

utf8 works, utf8mb4 not. I think varchar(80) should be raised or the index limited - https://github.com/TYPO3/TYPO3.CMS/blob/b66275c83818ddc02bda04ab67c53bf901cad54d/typo3/sysext/frontend/ext_tables.sql#L163.

What do you think? :)

Best regards
Tobias


Related issues

Related to TYPO3 Core - Bug #82551: Upgrade Wizard Deadlock New 2017-09-25
Related to TYPO3 Core - Feature #80398: Make default charset and collation for new tables configurable Under Review 2017-03-22

History

#1 Updated by Riccardo De Contardi 6 months ago

  • Status changed from New to Needs Feedback

I've checked on 8.7.9 and latest master - the field domainName is now varchar(255)

Do you think it is sufficient to consider the issue closed?

thank you.

#2 Updated by Tymoteusz Motylewski 5 months ago

Raising the domainName length will not make the issue disappear but will make it worse.

utf8mb4 uses 4 bytes per char, while "standard" utf8 collation uses 3 bytes per char.

This is why it fails on utf8mb4 and doesn't exceed the limit with plain utf8

#3 Updated by Riccardo De Contardi 5 months ago

  • Status changed from Needs Feedback to New

#4 Updated by Tymoteusz Motylewski 5 months ago

  • Related to Bug #82551: Upgrade Wizard Deadlock added

#5 Updated by Tymoteusz Motylewski 5 months ago

  • Related to Feature #80398: Make default charset and collation for new tables configurable added

#6 Updated by Sybille Peters about 1 month ago

What is the status on this?

Currently, if you want to use the (generally recommended) charset utf8mb4 for all tables, you can't because the indexes become too large (exceeds 1000 bytes).

This is currently the case in TYPO3 8 for:
  • sys_domain
  • fe_users
  • sys_refindex

#7 Updated by Sybille Peters about 1 month ago

  • Subject changed from Specified key was too long when creating an index to Indexes too large for some tables with utf8mb4

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