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  1. MariaDB Server
  2. MDEV-10096

Behaviour of SQL_NO_CACHE in derived tables is not consistent

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    Details

    • Type: Bug
    • Status: Open (View Workflow)
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: 10.1, 10.2, 10.3, 10.4
    • Fix Version/s: 10.4
    • Component/s: Parser
    • Labels:
      None

      Description

      This script (notice sql_no_cache is used as a column name rather than an option):

      CREATE OR REPLACE TABLE t1 (sql_no_cache INT);
      SELECT * FROM (SELECT 1 UNION SELECT SQL_NO_CACHE FROM t1) AS t1;
      

      returns:

      +------+
      | 1    |
      +------+
      |    1 |
      +------+
      

      This script:

      CREATE OR REPLACE TABLE t1 (sql_no_cache INT);
      SELECT * FROM (SELECT SQL_NO_CACHE FROM t1) AS t1;
      

      returns

      ERROR 1234 (42000): Incorrect usage/placement of 'SQL_NO_CACHE'
      

      Looks wrong. It should return the result.

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              Assignee:
              bar Alexander Barkov
              Reporter:
              bar Alexander Barkov
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                Dates

                Created:
                Updated:

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