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    LEFT JOIN optimization: Change LEFT JOIN to normal join if possible · a3beaaa3
    unknown authored
    
    mysql-test/r/select.result:
      Added test for LEFT JOIN optimization
    mysql-test/t/select.test:
      Added test for LEFT JOIN optimization
    sql/item.h:
      LEFT JOIN optimization
    sql/item_cmpfunc.cc:
      LEFT JOIN optimization
    sql/item_cmpfunc.h:
      LEFT JOIN optimization
    sql/item_func.cc:
      LEFT JOIN optimization
    sql/item_func.h:
      LEFT JOIN optimization
    sql/item_strfunc.cc:
      LEFT JOIN optimization
    sql/sql_base.cc:
      Heart of LEFT JOIN optimization
    a3beaaa3
item_cmpfunc.h 17.4 KB