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  1. MariaDB Server
  2. MDEV-36094

Row ID filtering for reverse-ordered scans

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    Description

      MDEV-34413 mentions, in passing, that we may be able to re-enable row ID filtering for reverse-ordered scans. Disabled by default in prepare_for_reverse_ordered_access (see sql_select.cc), rowid filtering was causing a significant performance regression in some cases (such as MDEV-33875).

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-33875 ORDER BY DESC causes ROWID Filter optimization performance degradation

          • Major - Major loss of function.
          • Closed

          New Feature - A new feature of the product, which has yet to be developed. MDEV-34413 Index Condition Pushdown for reverse-ordered scans

          • Major - Major loss of function.
          • Closed

          Activity

            Transition Time In Source Status Execution Times
            Dave Gosselin made transition -
            Open In Progress
            		3d 23h 51m 1
            Sergei Petrunia made transition -
            In Review Stalled
            		12d 13h 35m 1
            Dave Gosselin made transition -
            In Progress Needs Feedback
            		6h 47m 1
            Dave Gosselin made transition -
            Needs Feedback Closed
            		23h 49m 1
            Dave Gosselin made transition -
            Closed Stalled
            		3s 1
            Dave Gosselin made transition -
            Stalled In Progress
            		2h 21m 2
            Dave Gosselin made transition -
            In Progress In Review
            		1d 27m 2
            Dave Gosselin made transition -
            In Review In Testing
            		4d 16h 24m 1
            Lena Startseva made transition -
            In Testing Stalled
            		2d 2h 56m 1
            Dave Gosselin made transition -
            Stalled Closed
            		7d 20h 52m 1

            People

              Gosselin Dave Gosselin
              Gosselin Dave Gosselin
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              Dates

                Created:
                Updated:
                Resolved:

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