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doc-exports/docs/dws/tool/dws_16_0165.html
luhuayi a5e3903f6b DWS TG 910.211 version 
Reviewed-by: Pruthi, Vineet <vineet.pruthi@t-systems.com>
Co-authored-by: luhuayi <luhuayi@huawei.com>
Co-committed-by: luhuayi <luhuayi@huawei.com>
2025-04-23 13:53:01 +00:00

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<a name="EN-US_TOPIC_0000001813598868"></a><a name="EN-US_TOPIC_0000001813598868"></a>
<h1 class="topictitle1">Adding/Deleting a Column</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_p7574545962">The statements for adding and deleting columns in MySQL are different from those in GaussDB(DWS). DSC will perform adaptation based on GaussDB(DWS) features during migration.</p>
<div class="caution" id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_note9749104517138"><span class="cautiontitle"><img src="public_sys-resources/caution_3.0-en-us.png"> </span><div class="cautionbody"><p id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_p117497455133">GaussDB does not support the update of sequence numbers in table definitions. Temporarily, Migration Tool does not support the complete migration of the &lt;cf id="Bold"&gt;FRIST&lt;/cf&gt; and &lt;cf id="Bold"&gt;AFTER&lt;/cf&gt; features. So as a workaround, it simply deletes the keyword.</p>
</div></div>
<p id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_p8822521203711"><strong id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_b20727929204011">Input</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_screen832116160817"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
<span class="normal"> 2</span>
<span class="normal"> 3</span>
<span class="normal"> 4</span>
<span class="normal"> 5</span>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span>
<span class="normal">15</span>
<span class="normal">16</span>
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<span class="normal">19</span>
<span class="normal">20</span>
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<span class="normal">24</span>
<span class="normal">25</span>
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<span class="normal">31</span>
<span class="normal">32</span>
<span class="normal">33</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="k">IF</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">EXISTS</span><span class="w"> </span><span class="o">`</span><span class="n">runoob_alter_test</span><span class="o">`</span><span class="p">(</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType1</span><span class="o">`</span><span class="w"> </span><span class="nb">int</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="n">AUTO_INCREMENT</span><span class="p">,</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType2</span><span class="o">`</span><span class="w"> </span><span class="nb">FLOAT</span><span class="p">(</span><span class="mi">10</span><span class="p">,</span><span class="mi">2</span><span class="p">),</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType3</span><span class="o">`</span><span class="w"> </span><span class="n">DOUBLE</span><span class="p">(</span><span class="mi">20</span><span class="p">,</span><span class="mi">8</span><span class="p">),</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType4</span><span class="o">`</span><span class="w"> </span><span class="nb">TEXT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType5</span><span class="o">`</span><span class="w"> </span><span class="k">YEAR</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">'2018'</span><span class="p">,</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType6</span><span class="o">`</span><span class="w"> </span><span class="n">DATETIME</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">'2018-10-12 15:27:33.999999'</span><span class="p">,</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType7</span><span class="o">`</span><span class="w"> </span><span class="nb">CHAR</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">''</span><span class="p">,</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType8</span><span class="o">`</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">50</span><span class="p">),</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType9</span><span class="o">`</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">50</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">''</span><span class="p">,</span>
<span class="w"> </span><span class="o">`</span><span class="n">dataType10</span><span class="o">`</span><span class="w"> </span><span class="k">TIME</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">'10:20:59'</span><span class="p">,</span>
<span class="w"> </span><span class="k">PRIMARY</span><span class="w"> </span><span class="k">KEY</span><span class="p">(</span><span class="o">`</span><span class="n">dataType1</span><span class="o">`</span><span class="p">)</span>
<span class="p">)</span><span class="n">ENGINE</span><span class="o">=</span><span class="n">InnoDB</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="n">CHARSET</span><span class="o">=</span><span class="n">utf8</span><span class="p">;</span>
<span class="o">##</span><span class="w"> </span><span class="n">A</span><span class="p">.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="n">dataType1_1</span><span class="w"> </span><span class="nb">INT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">AFTER</span><span class="w"> </span><span class="n">dataType1</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="n">dataType1_1</span><span class="p">;</span>
<span class="o">##</span><span class="w"> </span><span class="n">B</span><span class="p">.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="n">dataType1_1</span><span class="w"> </span><span class="nb">INT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">FIRST</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="n">dataType1_1</span><span class="p">;</span>
<span class="o">##</span><span class="w"> </span><span class="k">C</span><span class="p">.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="n">dataType1_1</span><span class="w"> </span><span class="nb">INT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">AFTER</span><span class="w"> </span><span class="n">dataType2</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="n">dataType1_1</span><span class="p">;</span>
<span class="o">##</span><span class="w"> </span><span class="n">D</span><span class="p">.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="n">dataType1_1</span><span class="w"> </span><span class="nb">INT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">FIRST</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="n">dataType1_1</span><span class="p">;</span>
<span class="o">##</span><span class="w"> </span><span class="n">E</span><span class="p">.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="p">(</span><span class="n">dataType1_1</span><span class="w"> </span><span class="nb">INT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span><span class="w"> </span><span class="n">dataType1_2</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">);</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">runoob_alter_test</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="n">dataType1_1</span><span class="p">,</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="n">dataType1_2</span><span class="p">;</span>
</pre></div></td></tr></table></div>
</div>
<p id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_p1431826173714"><strong id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_b11199142516406">Output</strong></p>
<div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001813598868__en-us_topic_0000001436055765_en-us_topic_0214164714_screen14391919489"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
<span class="normal"> 2</span>
<span class="normal"> 3</span>
<span class="normal"> 4</span>
<span class="normal"> 5</span>
<span class="normal"> 6</span>
<span class="normal"> 7</span>
<span class="normal"> 8</span>
<span class="normal"> 9</span>
<span class="normal">10</span>
<span class="normal">11</span>
<span class="normal">12</span>
<span class="normal">13</span>
<span class="normal">14</span>
<span class="normal">15</span>
<span class="normal">16</span>
<span class="normal">17</span>
<span class="normal">18</span>
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<span class="normal">20</span>
<span class="normal">21</span>
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<span class="normal">23</span>
<span class="normal">24</span>
<span class="normal">25</span>
<span class="normal">26</span>
<span class="normal">27</span>
<span class="normal">28</span>
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<span class="normal">30</span>
<span class="normal">31</span>
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<span class="normal">35</span>
<span class="normal">36</span>
<span class="normal">37</span></pre></div></td><td class="code"><div><pre><span></span><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span>
<span class="p">(</span>
<span class="w"> </span><span class="ss">&quot;datatype1&quot;</span><span class="w"> </span><span class="nb">SERIAL</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype2&quot;</span><span class="w"> </span><span class="nb">REAL</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype3&quot;</span><span class="w"> </span><span class="n">DOUBLE</span><span class="w"> </span><span class="k">PRECISION</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype4&quot;</span><span class="w"> </span><span class="nb">TEXT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype5&quot;</span><span class="w"> </span><span class="nb">SMALLINT</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">'2018'</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype6&quot;</span><span class="w"> </span><span class="k">TIMESTAMP</span><span class="w"> </span><span class="k">WITHOUT</span><span class="w"> </span><span class="k">TIME</span><span class="w"> </span><span class="k">ZONE</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">'2018-10-12 15:27:33.999999'</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype7&quot;</span><span class="w"> </span><span class="nb">CHAR</span><span class="p">(</span><span class="mi">4</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">''</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype8&quot;</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">200</span><span class="p">),</span>
<span class="w"> </span><span class="ss">&quot;datatype9&quot;</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">200</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">''</span><span class="p">,</span>
<span class="w"> </span><span class="ss">&quot;datatype10&quot;</span><span class="w"> </span><span class="k">TIME</span><span class="w"> </span><span class="k">WITHOUT</span><span class="w"> </span><span class="k">TIME</span><span class="w"> </span><span class="k">ZONE</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">'10:20:59'</span><span class="p">,</span>
<span class="w"> </span><span class="k">PRIMARY</span><span class="w"> </span><span class="k">KEY</span><span class="w"> </span><span class="p">(</span><span class="ss">&quot;datatype1&quot;</span><span class="p">)</span>
<span class="p">)</span>
<span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span><span class="w"> </span><span class="n">ORIENTATION</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">ROW</span><span class="p">,</span><span class="w"> </span><span class="n">COMPRESSION</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">NO</span><span class="w"> </span><span class="p">)</span>
<span class="w"> </span><span class="n">NOCOMPRESS</span>
<span class="w"> </span><span class="n">DISTRIBUTE</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="n">HASH</span><span class="w"> </span><span class="p">(</span><span class="ss">&quot;datatype1&quot;</span><span class="p">);</span>
<span class="c1">-- A.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="k">RESTRICT</span><span class="p">;</span>
<span class="c1">-- B.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="k">RESTRICT</span><span class="p">;</span>
<span class="c1">-- C.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="k">RESTRICT</span><span class="p">;</span>
<span class="c1">-- D.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="mi">0</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="k">RESTRICT</span><span class="p">;</span>
<span class="c1">-- E.</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="nb">INTEGER</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span><span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_2&quot;</span><span class="w"> </span><span class="nb">VARCHAR</span><span class="p">(</span><span class="mi">800</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="w"> </span><span class="k">DEFAULT</span><span class="w"> </span><span class="s1">''</span><span class="p">;</span>
<span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="ss">&quot;public&quot;</span><span class="p">.</span><span class="ss">&quot;runoob_alter_test&quot;</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_1&quot;</span><span class="w"> </span><span class="k">RESTRICT</span><span class="p">,</span><span class="w"> </span><span class="k">DROP</span><span class="w"> </span><span class="k">COLUMN</span><span class="w"> </span><span class="ss">&quot;datatype1_2&quot;</span><span class="w"> </span><span class="k">RESTRICT</span><span class="p">;</span>
</pre></div></td></tr></table></div>
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<div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_16_0119.html">Table (Optional Parameters and Operations)</a></div>
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