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  1. MariaDB Server
  2. MDEV-24673

btr_cur_pessimistic_delete() fails to shrink the index B-tree

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    Description

      As noted in MDEV-24653, the function btr_cur_pessimistic_delete() is neglecting the opportunity to shrink the index tree when only one sibling page would remain after btr_discard_page(). The MDEV-24653 test case creates a B-tree that consists of two pages: the root page pointing to only one child page, and a leaf page containing one hidden record.

      And as noted in MDEV-14637, when fixing this, we would have to be very careful in order to avoid introducing deadlocks.

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-24796 Assertion `page_has_next(block->frame) || rec_is_alter_metadata(p, *index) || block->page.id().page_no() != index->page' failed in btr_pcur_store_position and other related asserts

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

          Bug - A problem which impairs or prevents the functions of the product. MDEV-14637 Latching order violation during btr_cur_pessimistic_delete()

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MDEV-24653 Assertion `block->page.id().page_no() == index->page' failed in innobase_instant_try

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Activity

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            marko Marko Mäkelä created issue -
            marko Marko Mäkelä made changes -
            Field Original Value New Value
            marko Marko Mäkelä made changes -
            Roel Roel Van de Paar made changes -
            serg Sergei Golubchik made changes -
            Workflow MariaDB v3 [ 118446 ] MariaDB v4 [ 142524 ]
            marko Marko Mäkelä made changes -
            Assignee Marko Mäkelä [ marko ] Debarun Banerjee [ JIRAUSER54513 ]

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              debarun Debarun Banerjee
              marko Marko Mäkelä
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