云数据库 GAUSSDB-EXPLAIN:语法格式

时间:2024-11-01 17:13:48

语法格式

  • 显示SQL语句的执行计划,支持多种选项,对选项顺序无要求。
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    EXPLAIN [ ( option [, ...] ) ] statement;
    

    其中选项option子句的语法为。

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    ANALYZE [ boolean ] |
        ANALYSE [ boolean ] |
        VERBOSE [ boolean ] |
        COSTS [ boolean ] |
        CPU [ boolean ] |
        DETAIL [ boolean ] |
        NODES [ boolean ] |
        NUM_NODES [ boolean ] |
        BUFFERS [ boolean ] |
        TIMING [ boolean ] |
        PLAN [ boolean ] |
        BLOCKNAME [ boolean ] |
        FORMAT { TEXT | XML | JSON | YAML }
    
  • 显示SQL语句的执行计划,且要按顺序给出选项。
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    EXPLAIN { [ ANALYZE | ANALYSE ] [ VERBOSE ] | PERFORMANCE } statement;
    
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