Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-16849

Extending indexed VARCHAR column should be instantaneous

    XMLWordPrintable

Details

    Description

      MySQL 5.7 (which was merged to MariaDB 10.2.2) implements an instantaneous change of the maximum length of a VARCHAR column when the length is increasing and not crossing the 255-byte boundary.

      Alas, when the VARCHAR column was indexed, the indexes would be dropped and added. This should be avoided.

      MySQL 5.7.23 addressed this by changing the storage engine API. We would prefer a less intrusive change. InnoDB should be able to ‘optimize away’ pairs of DROP INDEX and ADD INDEX operations. (While doing that, InnoDB in MariaDB should support the renaming of indexes as well, without introducing the RENAME INDEX syntax from MySQL 5.7.)

      Attachments

        Issue Links

          Activity

            People

              thiru Thirunarayanan Balathandayuthapani
              marko Marko Mäkelä
              Votes:
              0 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved:

                Git Integration

                  Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.