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Su, Xiaomeng
04d4597cf3
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>
23 lines
2.5 KiB
HTML
23 lines
2.5 KiB
HTML
<a name="dli_08_0258"></a><a name="dli_08_0258"></a>
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<h1 class="topictitle1">Creating a Temporary Stream</h1>
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<div id="body1574393121902"><div class="section" id="dli_08_0258__section204511548185514"><h4 class="sectiontitle">Function</h4><p id="dli_08_0258__p251281115013">The temporary stream is used to simplify SQL logic. If complex SQL logic is followed, write SQL statements concatenated with temporary streams. The temporary stream is just a logical concept and does not generate any data.</p>
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</div>
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<div class="section" id="dli_08_0258__section17191277562"><h4 class="sectiontitle">Syntax</h4><div class="codecoloring" codetype="Sql" id="dli_08_0258__screen18441237155620"><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">CREATE</span><span class="w"> </span><span class="n">TEMP</span><span class="w"> </span><span class="n">STREAM</span><span class="w"> </span><span class="n">stream_id</span><span class="w"> </span><span class="p">(</span><span class="n">attr_name</span><span class="w"> </span><span class="n">attr_type</span><span class="w"> </span><span class="p">(</span><span class="s1">','</span><span class="w"> </span><span class="n">attr_name</span><span class="w"> </span><span class="n">attr_type</span><span class="p">)</span><span class="o">*</span><span class="w"> </span><span class="p">)</span>
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</pre></div></td></tr></table></div>
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</div>
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</div>
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<div class="section" id="dli_08_0258__section0980251175613"><h4 class="sectiontitle">Example</h4><div class="codecoloring" codetype="Sql" id="dli_08_0258__screen2092424014338"><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">create</span><span class="w"> </span><span class="n">temp</span><span class="w"> </span><span class="n">stream</span><span class="w"> </span><span class="n">a2</span><span class="p">(</span><span class="n">attr1</span><span class="w"> </span><span class="nb">int</span><span class="p">,</span><span class="w"> </span><span class="n">attr2</span><span class="w"> </span><span class="n">string</span><span class="p">);</span>
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</pre></div></td></tr></table></div>
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</div>
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</div>
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</div>
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<div>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dli_08_0233.html">Flink SQL Syntax</a></div>
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</div>
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</div>
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