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  1. MariaDB Server
  2. MDEV-10128

Port MySQL 5.7 select count() optimization

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      Current handler::records() is not fully usable as InnoDB could roll back the statement on some cases and you may not continue after that, it should be int records(ha_rows *n_rows) and server should check as these errors will abort the current query:
      case HA_ERR_LOCK_DEADLOCK:
      case HA_ERR_LOCK_TABLE_FULL:
      case HA_ERR_LOCK_WAIT_TIMEOUT:
      case HA_ERR_QUERY_INTERRUPTED:

      see commit 40ec5373c0 on 5.7

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          relates to

          Task - A task that needs to be done. MDEV-11751 Merge new release of InnoDB MySQL 5.7.18 to 10.2

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

          New Feature - A new feature of the product, which has yet to be developed. MDEV-18188 Maintain persistent COUNT(*) in InnoDB

          • Major - Major loss of function.
          • Stalled

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              marko Marko Mäkelä
              jplindst Jan Lindström (Inactive)
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