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PS-9297 Lost a record while scanning in reverse order on cursor #5348

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PS-9297 Lost a record while scanning in reverse order on cursor #5348

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Commits on Jul 5, 2024

  1. PS-9297 Lost a record while scanning in reverse order on cursor 

    https://perconadev.atlassian.net/browse/PS-9297

Problem
========
If the last user record on the prev leaf is pessimistically updated during move_backward_from_page, the record may be deleted from the prev leaf and reinserted into the current page. Scanning in reverse order will miss this record.

Cause
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Same as PS-9092, move_backward_from_page cannot sense that records are moved from the prev leaf to the current leaf.

Solution
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If btr_insert_into_right_sibling causes records to move between pages, prevent the next page from being optimistically accessed
    zhangruyi.vedb committed Jul 5, 2024
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