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Merge a contribution from Ryan Mack at Facebook:

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Bugfix for 53290, fast unique index creation fails on duplicate null values

    Summary:
    Bug in the fast index creation code incorrectly considers null
    values to be duplicates during block merging.  Innodb policy is that
    multiple null values are allowed in a unique index.  Null duplicates
    were correctly ignored while sorting individual blocks and with slow
    index creation.

    Test Plan:
    mtr, including new test, load dbs using deferred index creation

    DiffCamp Revision: 110840
    Reviewed By: mcallaghan
    CC: mcallaghan, mysql-devel@lists
    Revert Plan:
    OK
This commit is contained in:
Marko Mäkelä
2010-05-05 15:39:01 +03:00
parent 2582a3e97b
commit 543ae0093c
5 changed files with 57 additions and 6 deletions
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4
storage/innodb_plugin/include/rem0cmp.h
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@@ -148,7 +148,9 @@ cmp_rec_rec_simple(
const rec_t* rec2, /*!< in: physical record */
const ulint* offsets1,/*!< in: rec_get_offsets(rec1, ...) */
const ulint* offsets2,/*!< in: rec_get_offsets(rec2, ...) */
const dict_index_t* index); /*!< in: data dictionary index */
const dict_index_t* index, /*!< in: data dictionary index */
ibool* null_eq);/*!< out: set to TRUE if
found matching null values */
/*************************************************************//**
This function is used to compare two physical records. Only the common
first fields are compared, and if an externally stored field is