forked from docs/doc-exports
Lu, Huayi
27019c2991
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com> Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com> Co-authored-by: Lu, Huayi <luhuayi@huawei.com> Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
39 lines
4.2 KiB
HTML
39 lines
4.2 KiB
HTML
<a name="EN-US_TOPIC_0000001772696128"></a><a name="EN-US_TOPIC_0000001772696128"></a>
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<h1 class="topictitle1">ACCESS LOCK</h1>
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<div id="body8662426"><p id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_p58281854183811">ACCESS LOCK allows you to read the data from a table that may have been locked for the READ or WRITE.</p>
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<p id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_p1396735112616">Use the <strong id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_b156638630832351"><a href="dws_16_0014.html#EN-US_TOPIC_0000001819416085__en-us_topic_0000001706224349_en-us_topic_0000001432527901_li18084318118">tdMigrateLOCKoption</a></strong> configuration parameter to configure migration of query containing the LOCK keyword. If <strong id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_b65747674732351">tdMigrateLOCKOption</strong> is set to <strong id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_b124042694732351">false</strong>, the tool will skip migration of the query and will log a message.</p>
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<p id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_p67491859133316"><strong id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_b89818615632351">Input - ACCESS LOCK</strong><strong id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_b61005017132351"> (tdMigrateLOCKOption=True</strong>)</p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_screen1749321717399"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
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<span class="normal">2</span>
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<span class="normal">3</span>
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<span class="normal">4</span>
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<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="n">LOCKING</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">tab1</span><span class="w"> </span><span class="k">FOR</span><span class="w"> </span><span class="k">ACCESS</span>
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<span class="w"> </span><span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">tab2</span>
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<span class="k">SELECT</span><span class="w"> </span><span class="err">…</span>
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<span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="err">…</span>
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<span class="w"> </span><span class="k">WHERE</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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<p id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_p1349431716399"><strong id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_b2311101913419">Output</strong></p>
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<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772696128__en-us_topic_0000001706224341_en-us_topic_0000001384390504_screen1495117103912"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal">1</span>
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<span class="normal">2</span>
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<span class="normal">3</span>
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<span class="normal">4</span>
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<span class="normal">5</span></pre></div></td><td class="code"><div><pre><span></span><span class="cm">/* LOCKING TABLE tab1 FOR ACCESS */</span>
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<span class="k">INSERT</span><span class="w"> </span><span class="k">INTO</span><span class="w"> </span><span class="n">tab2</span><span class="w"> </span>
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<span class="k">SELECT</span><span class="w"> </span><span class="err">…</span>
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<span class="w"> </span><span class="k">FROM</span><span class="w"> </span><span class="err">…</span><span class="w"> </span>
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<span class="w"> </span><span class="k">WHERE</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>
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<div class="familylinks">
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0059.html">Schema Objects and Data Definition Language (DDL)</a></div>
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</div>
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</div>
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