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Lu, Huayi a24ca60074 DWS DEVELOPER 811 version 
Reviewed-by: Hasko, Vladimir <vladimir.hasko@t-systems.com>
Co-authored-by: Lu, Huayi <luhuayi@huawei.com>
Co-committed-by: Lu, Huayi <luhuayi@huawei.com>
2023-01-19 13:37:49 +00:00

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<a name="EN-US_TOPIC_0000001099150926"></a><a name="EN-US_TOPIC_0000001099150926"></a>
<h1 class="topictitle1">Constant and Macro</h1>
<div id="body8662426"><p id="EN-US_TOPIC_0000001099150926__a4be740b392d84e919b9544337307fcd2"><a href="#EN-US_TOPIC_0000001099150926__t556b0d4fd31645a3aaaa95c4dfe3c89c">Table 1</a> lists the constants and macros that can be used in <span id="EN-US_TOPIC_0000001099150926__text1090385208">GaussDB(DWS)</span>.</p>
<div class="tablenoborder"><a name="EN-US_TOPIC_0000001099150926__t556b0d4fd31645a3aaaa95c4dfe3c89c"></a><a name="t556b0d4fd31645a3aaaa95c4dfe3c89c"></a><table cellpadding="4" cellspacing="0" summary="" id="EN-US_TOPIC_0000001099150926__t556b0d4fd31645a3aaaa95c4dfe3c89c" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Constants and macros</caption><thead align="left"><tr id="EN-US_TOPIC_0000001099150926__r774cccd323ed4e2582b3d22a64f63136"><th align="left" class="cellrowborder" valign="top" width="19.54%" id="mcps1.3.2.2.4.1.1"><p id="EN-US_TOPIC_0000001099150926__aecf2f395797a4fd28cf26495ce49f1cf">Parameter</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="33.82%" id="mcps1.3.2.2.4.1.2"><p id="EN-US_TOPIC_0000001099150926__a2fa9399e84cb4cdeaeb71e81ab9332f1">Description</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="46.64%" id="mcps1.3.2.2.4.1.3"><p id="EN-US_TOPIC_0000001099150926__a4659e9497c714cb7a88c04c95575d203">Examples</p>
</th>
</tr>
</thead>
<tbody><tr id="EN-US_TOPIC_0000001099150926__rd32d9a502f1e4303b6d41023b0e65ccb"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__a8decf872415e455bb85a6c93c53ee560">CURRENT_CATALOG</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__a6b5b4ffbde304bd5a90c9c6741219692">Specifies the current database.</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__s296dbfa0fc85417b9f1c59229a846a7b"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">CURRENT_CATALOG</span><span class="p">;</span><span class="w"></span>
<span class="n">current_database</span><span class="w"></span>
<span class="c1">------------------</span>
<span class="n">gaussdb</span><span class="w"></span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__ra6f98f2c47d34f338c9a1b3733b90f44"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__ae8a7a4fe3ffa49bb93ac48101c55e092">CURRENT_ROLE</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__ac006c1662ff040e8b2ff6afe75d87135">Current role</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__s87b4f0426edd40a08b19da649b531f50"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="k">CURRENT_ROLE</span><span class="p">;</span><span class="w"></span>
<span class="k">current_user</span><span class="w"></span>
<span class="c1">--------------</span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__r37837364cc8749689efe9491784898a2"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__acf5d3db7132144ea90f76204ecbffed5">CURRENT_SCHEMA</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__a7be313cbf85d44ba88997ae4702c45d6">Current database model</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__se16d971db408482cb0d53dbe037119e5"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">CURRENT_SCHEMA</span><span class="p">;</span><span class="w"></span>
<span class="n">current_schema</span><span class="w"></span>
<span class="c1">----------------</span>
<span class="k">public</span><span class="w"></span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__r89545f006cf24f70a0dd9d0680b82866"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__a36a76cc168554cb69874295bf749ff08">CURRENT_USER</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__aed57586a456d438aa006cddf0d30df3e">Current user</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__s4a4065ebba2d4faa83616db75280f95a"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="k">CURRENT_USER</span><span class="p">;</span><span class="w"></span>
<span class="k">current_user</span><span class="w"></span>
<span class="c1">--------------</span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__r4f809dd1a0d64300ac2c8c10b97528b9"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__ab3b97e05bd4443b7b99bb3a630603c90">LOCALTIMESTAMP</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__a0de4b7ec9e3a40e1913ecdbcaaa04ac5">Current session time (without time zone)</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__s4fd93284499042afb1a63c2906194960"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="k">LOCALTIMESTAMP</span><span class="p">;</span><span class="w"></span>
<span class="w"> </span><span class="k">timestamp</span><span class="w"></span>
<span class="c1">----------------------------</span>
<span class="mi">2015</span><span class="o">-</span><span class="mi">10</span><span class="o">-</span><span class="mi">10</span><span class="w"> </span><span class="mi">15</span><span class="p">:</span><span class="mi">37</span><span class="p">:</span><span class="mi">30</span><span class="p">.</span><span class="mi">968538</span><span class="w"></span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__r84251706456a4cd49723644b55e73544"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__af09465deec0d44788160950487f41916">NULL</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__a411ab4f745044a6a975316b270d08a77">This parameter is left blank.</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><p id="EN-US_TOPIC_0000001099150926__a299fb1ca76194a129a27e6832876198d">-</p>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__r4b38571ef14f4afdbe0996e43c4c570c"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__a491dfff9af3e49c187af7e5e938c55f3"></p>
<p id="EN-US_TOPIC_0000001099150926__a24ffc63b5ac74ababe40127e1f4bd21d">SESSION_USER</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__a2b5c9517ee084b63a6802ec9e4e84e43">Current system user</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__s758f34e53e94407cb9411bb8a6f8d361"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="k">SESSION_USER</span><span class="p">;</span><span class="w"></span>
<span class="k">session_user</span><span class="w"></span>
<span class="c1">--------------</span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__rb7a9ae275a744b3cbb4880839ab029bc"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__aa9a78dbbd2754414ab1acbcfc82aadbc">SYSDATE</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__ab0f97da609264f66b44fa11f40eb4957">Current system date</p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__se90adb6e9580402ca5e38d6f5f543669"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="n">SYSDATE</span><span class="p">;</span><span class="w"></span>
<span class="n">sysdate</span><span class="w"></span>
<span class="c1">---------------------</span>
<span class="mi">2015</span><span class="o">-</span><span class="mi">10</span><span class="o">-</span><span class="mi">10</span><span class="w"> </span><span class="mi">15</span><span class="p">:</span><span class="mi">48</span><span class="p">:</span><span class="mi">53</span><span class="w"></span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
<tr id="EN-US_TOPIC_0000001099150926__rf0a448ea96c64d488b3bc274d145efa5"><td class="cellrowborder" valign="top" width="19.54%" headers="mcps1.3.2.2.4.1.1 "><p id="EN-US_TOPIC_0000001099150926__a68108f1bc354497c81a1ddce7d316ad4">USER</p>
</td>
<td class="cellrowborder" valign="top" width="33.82%" headers="mcps1.3.2.2.4.1.2 "><p id="EN-US_TOPIC_0000001099150926__a5c5162f530c84dddab7762a5b1f9201b">Current user, also called <strong id="EN-US_TOPIC_0000001099150926__b4488366093345">CURRENT_USER</strong></p>
</td>
<td class="cellrowborder" valign="top" width="46.64%" headers="mcps1.3.2.2.4.1.3 "><div class="codecoloring" codetype="Sql" id="EN-US_TOPIC_0000001099150926__s8744109b062d4ab1918d0c6bad78445e"><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></pre></div></td><td class="code"><div><pre><span></span><span class="k">SELECT</span><span class="w"> </span><span class="k">USER</span><span class="p">;</span><span class="w"></span>
<span class="k">current_user</span><span class="w"></span>
<span class="c1">--------------</span>
<span class="p">(</span><span class="mi">1</span><span class="w"> </span><span class="k">row</span><span class="p">)</span><span class="w"></span>
</pre></div></td></tr></table></div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
<div>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="dws_04_2000.html">SQL Syntax Reference</a></div>
</div>
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