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Su, Xiaomeng
76a5b1ee83
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Su, Xiaomeng <suxiaomeng1@huawei.com> Co-committed-by: Su, Xiaomeng <suxiaomeng1@huawei.com>
29 lines
3.4 KiB
HTML
29 lines
3.4 KiB
HTML
<a name="dli_08_0138"></a><a name="dli_08_0138"></a>
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<h1 class="topictitle1">Viewing the Execution Plan</h1>
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<div id="body8662426"><div class="section" id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_s8ad82b281ae34d59839ee7abda4dae86"><h4 class="sectiontitle">Function</h4><p id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_a0dd50a1977554dacb422b0f09f9efc48">This statement returns the logical plan and physical execution plan for the SQL statement.</p>
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<div class="section" id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_seae174ba186a43139b8f20854741f860"><h4 class="sectiontitle">Syntax</h4><div class="codecoloring" codetype="Sql" id="dli_08_0138__en-us_topic_0114776232_screen1624363412010"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">EXPLAIN</span><span class="w"> </span><span class="p">[</span><span class="n">EXTENDED</span><span class="w"> </span><span class="o">|</span><span class="w"> </span><span class="n">CODEGEN</span><span class="p">]</span><span class="w"> </span><span class="k">statement</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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<div class="section" id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_s445ffdbbcc214ecd98c1770b362930c2"><h4 class="sectiontitle">Keywords</h4><p id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_a9ff231dbcae5433986d3e9ca5d2cb133"><strong id="dli_08_0138__b237333216576">EXTENDED</strong>: After this keyword is specified, the logical and physical plans are outputted at the same time.</p>
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<p id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_ae98897ed398a44dfb6f29259472b33fd"><strong id="dli_08_0138__b19366163385713">CODEGEN</strong>: After this keyword is specified, code generated by using the Codegen is also outputted.</p>
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<div class="section" id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_s6b07df469e884ddfb68dcec4b6531237"><h4 class="sectiontitle">Precautions</h4><p id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_ac8cdff5bcb7140d3af3b2c05a26f22f9">None</p>
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<div class="section" id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_s711bc66821224c7ba191edf1da77e2ff"><h4 class="sectiontitle">Example</h4><p id="dli_08_0138__en-us_topic_0114776232_en-us_topic_0093946738_a49f4a46d39814fe4b396b52dcaa38ec0">To return the logical and physical plans of <strong id="dli_08_0138__b8513264288">SELECT * FROM test</strong>, run the following statement:</p>
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<div class="codecoloring" codetype="Sql" id="dli_08_0138__en-us_topic_0114776232_screen579215521013"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">EXPLAIN</span><span class="w"> </span><span class="n">EXTENDED</span><span class="w"> </span><span class="k">select</span><span class="w"> </span><span class="o">*</span><span class="w"> </span><span class="k">from</span><span class="w"> </span><span class="n">test</span><span class="p">;</span>
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</pre></div></td></tr></table></div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dli_08_0221.html">Spark SQL Syntax Reference</a></div>
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