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Lu, Huayi 27019c2991 DWS TOOL 830.201 version 
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>
2024-05-16 07:35:25 +00:00

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<a name="EN-US_TOPIC_0000001772536644"></a><a name="EN-US_TOPIC_0000001772536644"></a>
<h1 class="topictitle1">Unique Index</h1>
<div id="body8662426"><div class="section" id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_section15658154014450"><h4 class="sectiontitle">Unique Index</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_table425875517593" frame="border" border="1" rules="all"><thead align="left"><tr id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_row825845545917"><th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.1.2.1.3.1.1"><p id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_p16760432192811"><strong id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0237712350_b825811552594">Netezza Syntax</strong></p>
</th>
<th align="left" class="cellrowborder" valign="top" width="50%" id="mcps1.3.1.2.1.3.1.2"><p id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_p1876019323281"><strong id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0237712350_b81851635102616">Syntax After Migration</strong></p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_row122583559590"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.1.3.1.1 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_screen22155374468"><div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span class="normal"> 1</span>
<span class="normal"> 2</span>
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<span class="normal">51</span>
<span class="normal">52</span>
<span class="normal">53</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="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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">unique</span><span class="p">,</span>
<span class="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span>
<span class="n">DISTRIBUTE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">)</span>
<span class="n">ORGANIZE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">,</span><span class="w"> </span><span class="n">prod_name</span><span class="p">)</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="w"> </span><span class="k">CONSTRAINT</span><span class="w"> </span><span class="n">UQ_prod</span><span class="w"> </span><span class="k">unique</span><span class="p">,</span>
<span class="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span>
<span class="n">DISTRIBUTE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">)</span>
<span class="n">ORGANIZE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">,</span><span class="w"> </span><span class="n">prod_name</span><span class="p">)</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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">PRIMARY</span><span class="w"> </span><span class="k">KEY</span><span class="p">,</span>
<span class="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span>
<span class="n">DISTRIBUTE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">)</span>
<span class="n">ORGANIZE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">,</span><span class="w"> </span><span class="n">prod_name</span><span class="p">)</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span><span class="p">,</span>
<span class="w"> </span><span class="k">constraint</span><span class="w"> </span><span class="n">uq_prod</span><span class="w"> </span><span class="k">UNIQUE</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">)</span>
<span class="p">)</span>
<span class="n">DISTRIBUTE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">)</span>
<span class="n">ORGANIZE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">,</span><span class="w"> </span><span class="n">prod_name</span><span class="p">)</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span>
<span class="n">DISTRIBUTE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">)</span>
<span class="n">ORGANIZE</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">,</span><span class="w"> </span><span class="n">prod_name</span><span class="p">)</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">prod</span>
<span class="w"> </span><span class="k">ADD</span><span class="w"> </span><span class="k">constraint</span><span class="w"> </span><span class="n">uq_prod</span><span class="w"> </span><span class="k">UNIQUE</span><span class="w"> </span><span class="p">(</span><span class="n">prod_no</span><span class="p">);</span>
</pre></div></td></tr></table></div>
</div>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.3.1.2.1.3.1.2 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_screen758074210467"><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>
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<span class="normal">55</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="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="cm">/* unique */</span><span class="p">,</span>
<span class="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span><span class="w"> </span><span class="k">WITH</span><span class="p">(</span><span class="n">ORIENTATION</span><span class="o">=</span><span class="k">COLUMN</span><span class="p">)</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="n">prod_no</span><span class="p">)</span>
<span class="cm">/* ORGANIZE ON (prod_no, prod_name) */</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="w"> </span><span class="cm">/* CONSTRAINT UQ_prod unique */</span><span class="p">,</span>
<span class="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span><span class="w"> </span><span class="k">WITH</span><span class="p">(</span><span class="n">ORIENTATION</span><span class="o">=</span><span class="k">COLUMN</span><span class="p">)</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="n">prod_no</span><span class="p">)</span>
<span class="cm">/* ORGANIZE ON (prod_no, prod_name) */</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="cm">/* PRIMARY KEY */</span><span class="p">,</span>
<span class="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</span><span class="w"> </span><span class="k">WITH</span><span class="p">(</span><span class="n">ORIENTATION</span><span class="o">=</span><span class="k">COLUMN</span><span class="p">)</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="n">prod_no</span><span class="p">)</span>
<span class="cm">/* ORGANIZE ON (prod_no, prod_name) */</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span><span class="w"> </span><span class="cm">/*,</span>
<span class="cm"> constraint uq_prod UNIQUE (prod_no) */</span>
<span class="p">)</span><span class="w"> </span><span class="k">WITH</span><span class="p">(</span><span class="n">ORIENTATION</span><span class="o">=</span><span class="k">COLUMN</span><span class="p">)</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="n">prod_no</span><span class="p">)</span>
<span class="cm">/* ORGANIZE ON (prod_no, prod_name)*/</span>
<span class="p">;</span>
<span class="c1">----------</span>
<span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="n">prod</span>
<span class="p">(</span>
<span class="w"> </span><span class="n">prod_no</span><span class="w"> </span><span class="nb">number</span><span class="p">(</span><span class="mi">6</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="w"> </span><span class="n">prod_name</span><span class="w"> </span><span class="k">national</span><span class="w"> </span><span class="nb">character</span><span class="w"> </span><span class="nb">varying</span><span class="p">(</span><span class="mi">32</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="w"> </span><span class="n">prod_desc</span><span class="w"> </span><span class="k">clob</span>
<span class="p">)</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="n">prod_no</span><span class="p">)</span>
<span class="cm">/*ORGANIZE ON (prod_no, prod_name)*/</span>
<span class="p">;</span>
<span class="cm">/*</span>
<span class="cm">ALTER TABLE prod</span>
<span class="cm"> ADD constraint uq_prod UNIQUE (prod_no);</span>
<span class="cm">*/</span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="note" id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_note18989856184717"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="EN-US_TOPIC_0000001772536644__en-us_topic_0000001658024498_en-us_topic_0238518437_en-us_topic_0237362517_en-us_topic_0213479757_p18252137346">This feature is applicable only for COLUMN store. For ROW store, Unique Index should not be commented.</p>
</div></div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_07_0682.html">Netezza Syntax Migration</a></div>
</div>
</div>
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