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  1. MariaDB Server
  2. MDEV-39904

MariaDB crash triggered by ST_SIMPLIFY inside GROUP BY/HAVING set operation

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Duplicate
    • 10.11, 11.4, 11.8, 12.3.2
    • N/A
    • Optimizer
    • Linux x86_64, Docker container
    • Not for Release Notes

    Description

      ~~~sql
      SELECT * FROM ( SELECT AVG ( DISTINCT x ) AS x FROM ( SELECT * FROM ( SELECT 1 AS x UNION SELECT 2 UNION SELECT 3 UNION SELECT 4 UNION SELECT ST_ASTEXT ( ST_SIMPLIFY ( ST_GEOMFROMTEXT ( 'LINESTRING(0 0,1 1,2 0,3 -1,4 0,5 1,6 0,7 -1,8 0,9 1,10 0)' ) , 1 ) ) ) AS x ) AS x INTERSECT SELECT x FROM ( SELECT * FROM ( SELECT 1 AS x UNION SELECT 2 UNION SELECT 3 ) AS x ORDER BY x + 2 DESC , x , x , ( SELECT x GROUP BY x HAVING x < 2000 ORDER BY x + 2 DESC , x , x , ( SELECT x ORDER BY 1 ) ) ) AS x ) AS x ;
      ~~~

        1. Expected result
          The server should either execute the query or return a normal SQL error without crashing.
        1. Actual result
          The fuzzing run observed a server crash. The deduplicated stack signature is:
          ~~~
          stack:Z17setup_copy_fieldsP3THDP15TMP_TABLE_PARAM20Bounds_checked_arrayIP4ItemER4ListIS4_ES9_jS9|_ZN4JOIN21make_aggr_tables_infoEv|_ZN4JOIN15optimize_stage2Ev|_ZN4JOIN14optimize_innerEv|_ZN4JOIN8optimizeEv|_ZN13st_select_lex31optimize_unflattened_subqueriesEb|_ZL22mysql_derived_optimizeP3THDP3LEXP10TABLE_LIST|_Z27mysql_handle_single_derivedP3LEXP10TABLE_LISTj
          ~~~

      Top frames:
      ~~~
      Z17setup_copy_fieldsP3THDP15TMP_TABLE_PARAM20Bounds_checked_arrayIP4ItemER4ListIS4_ES9_jS9
      _ZN4JOIN21make_aggr_tables_infoEv
      _ZN4JOIN15optimize_stage2Ev
      _ZN4JOIN14optimize_innerEv
      _ZN4JOIN8optimizeEv
      _ZN13st_select_lex31optimize_unflattened_subqueriesEb
      _ZL22mysql_derived_optimizeP3THDP3LEXP10TABLE_LIST
      _Z27mysql_handle_single_derivedP3LEXP10TABLE_LISTj
      ~~~

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            Unassigned Unassigned
            maohaogang maohaogang
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            Dates

              Created:
              Updated:
              Resolved:

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