Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-32496

TIMESTAMP variant to support YEAR range -4713 and +9999

    XMLWordPrintable

Details

    Description

      MariaDB TIMESTAMP supports year values in the range 1970..2038, and after MDEV-32188 it's going to support year values in the range 1970..2106.

      This range is still narrower than most other databases support:

      Data type Min Max
      Oracle TIMESTAMP -4713 9999
      DB2 TIMESTAP 0001 9999
      PostgreSQL TIMESTAMP -4713 294276
      SQL Server DATETIME2 0001 9999
      SQL Server DATETIME 1753 9999

      For migration purposes, we need a data type which will cover at least the range -4713..9999.

      It will need 5 bytes (instead of 4 bytes) to store the "number of seconds since 1970-01-01 00:00:00 UTC" value.

      Also, it will need a new C++ data type (instead of struct timeval) to transfer values inside the server.

      struct {
      		 
        longlong tv_sec; -- signed, to store negative years
      		 
        uint32 tv_usec; 
      };

      This task is also a dependency for

      • MDEV-15750 preserve MYSQL_TYPE_TIMESTAMP in temporal arithmetic

      Using TIMESTAMP arithmetic for the current TIMESTAMP implementation is not very meaningful because of the too small TIMESTAMP range.

      Attachments

        Issue Links

          blocks

          Task - A task that needs to be done. MDEV-10764 PL/SQL parser - Phase 2

          • Major - Major loss of function.
          • Open

          Epic - Created by Jira Software - do not edit or delete. Issue type for a big user story that needs to be broken down. MDEV-11070 Providing compatibility to other databases - Phase 2

          • Major - Major loss of function.
          • Open

          Task - A task that needs to be done. MDEV-15750 preserve MYSQL_TYPE_TIMESTAMP in temporal arithmetics

          • Major - Major loss of function.
          • Stalled
          relates to

          New Feature - A new feature of the product, which has yet to be developed. MDEV-341 64-bit support in FROM_UNIXTIME()

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-17389 sql_mode=ORACLE: Incompatibility in datetime arithmetic

          • Major - Major loss of function.
          • Open

          New Feature - A new feature of the product, which has yet to be developed. MDEV-32188 make TIMESTAMP use whole 32-bit unsigned range

          • Critical - Crashes, loss of data, severe memory leak.
          • In Testing

          New Feature - A new feature of the product, which has yet to be developed. MDEV-10018 Timestamp with time zone

          • Major - Major loss of function.
          • Open

          Activity

            People

              Unassigned Unassigned
              bar Alexander Barkov
              Votes:
              0 Vote for this issue
              Watchers:
              4 Start watching this issue

              Dates

                Created:
                Updated:

                Git Integration

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