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Su, Xiaomeng
76a5b1ee83
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>
53 lines
6.2 KiB
HTML
53 lines
6.2 KiB
HTML
<a name="dli_spark_sign"></a><a name="dli_spark_sign"></a>
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<h1 class="topictitle1">sign</h1>
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<div id="body8662426"><p id="dli_spark_sign__en-us_topic_0000001696282289_p18471163815215">This function is used to return the positive and negative signs corresponding to <strong id="dli_spark_sign__en-us_topic_0000001696282289_b1912608172614">a</strong>.</p>
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<div class="section" id="dli_spark_sign__en-us_topic_0000001696282289_section45291954203217"><h4 class="sectiontitle">Syntax</h4><pre class="screen" id="dli_spark_sign__en-us_topic_0000001696282289_screen19928459112517">sign(DOUBLE a)</pre>
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</div>
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<div class="section" id="dli_spark_sign__en-us_topic_0000001696282289_section992014913317"><h4 class="sectiontitle">Parameters</h4>
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<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="dli_spark_sign__en-us_topic_0000001696282289_table1829154762513" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameter</caption><thead align="left"><tr id="dli_spark_sign__en-us_topic_0000001696282289_row8830104792517"><th align="left" class="cellrowborder" valign="top" width="19.220000000000002%" id="mcps1.3.3.2.2.5.1.1"><p id="dli_spark_sign__en-us_topic_0000001696282289_p983074711252">Parameter</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="13.44%" id="mcps1.3.3.2.2.5.1.2"><p id="dli_spark_sign__en-us_topic_0000001696282289_p6830124732517">Mandatory</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="15.57%" id="mcps1.3.3.2.2.5.1.3"><p id="dli_spark_sign__en-us_topic_0000001696282289_p13318164512614">Type</p>
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</th>
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<th align="left" class="cellrowborder" valign="top" width="51.77%" id="mcps1.3.3.2.2.5.1.4"><p id="dli_spark_sign__en-us_topic_0000001696282289_p08301547132513">Description</p>
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</th>
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</tr>
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</thead>
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<tbody><tr id="dli_spark_sign__en-us_topic_0000001696282289_row15830184792511"><td class="cellrowborder" valign="top" width="19.220000000000002%" headers="mcps1.3.3.2.2.5.1.1 "><p id="dli_spark_sign__en-us_topic_0000001696282289_p683034714250">a</p>
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</td>
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<td class="cellrowborder" valign="top" width="13.44%" headers="mcps1.3.3.2.2.5.1.2 "><p id="dli_spark_sign__en-us_topic_0000001696282289_p12830184752518">Yes</p>
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</td>
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<td class="cellrowborder" valign="top" width="15.57%" headers="mcps1.3.3.2.2.5.1.3 "><p id="dli_spark_sign__en-us_topic_0000001696282289_p0318545102615">DOUBLE, BIGINT, DECIMAL, or STRING</p>
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</td>
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<td class="cellrowborder" valign="top" width="51.77%" headers="mcps1.3.3.2.2.5.1.4 "><p id="dli_spark_sign__en-us_topic_0000001696282289_p18653154615263">The value can be a float, integer, or string.</p>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div>
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<div class="section" id="dli_spark_sign__en-us_topic_0000001696282289_section210162513312"><h4 class="sectiontitle">Return Values</h4><p id="dli_spark_sign__en-us_topic_0000001696282289_p184124317231">The return value is of the DOUBLE type.</p>
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<div class="note" id="dli_spark_sign__en-us_topic_0000001696282289_note61422099395"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="dli_spark_sign__en-us_topic_0000001696282289_ul108341618205117"><li id="dli_spark_sign__en-us_topic_0000001696282289_li13834161835113">If the value of <strong id="dli_spark_sign__en-us_topic_0000001696282289_b142054611269">a</strong> is a positive number, <strong id="dli_spark_sign__en-us_topic_0000001696282289_b149864952610">1</strong> is returned.</li><li id="dli_spark_sign__en-us_topic_0000001696282289_li1834141855112">If the value of <strong id="dli_spark_sign__en-us_topic_0000001696282289_b19838550192610">a</strong> is a negative number, <strong id="dli_spark_sign__en-us_topic_0000001696282289_b11839165018260">-1</strong> is returned.</li><li id="dli_spark_sign__en-us_topic_0000001696282289_li98341818205116">If the value of <strong id="dli_spark_sign__en-us_topic_0000001696282289_b147110303665041">a</strong> is <strong id="dli_spark_sign__en-us_topic_0000001696282289_b181652619965041">0</strong>, <strong id="dli_spark_sign__en-us_topic_0000001696282289_b85039759765041">0</strong> is returned.</li><li id="dli_spark_sign__en-us_topic_0000001696282289_li78344188513">If the value of <strong id="dli_spark_sign__en-us_topic_0000001696282289_b174052657255757">a</strong> is <strong id="dli_spark_sign__en-us_topic_0000001696282289_b105859266355757">NULL</strong>, <strong id="dli_spark_sign__en-us_topic_0000001696282289_b191593514555757">NULL</strong> is returned.</li></ul>
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</div></div>
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</div>
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<div class="section" id="dli_spark_sign__en-us_topic_0000001696282289_section13277192233920"><h4 class="sectiontitle">Example Code</h4><p id="dli_spark_sign__en-us_topic_0000001696282289_p128724813247">The value <strong id="dli_spark_sign__en-us_topic_0000001696282289_b14029110966928">-1</strong> is returned.</p>
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<pre class="screen" id="dli_spark_sign__en-us_topic_0000001696282289_screen072419227242">select sign(-3);</pre>
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<p id="dli_spark_sign__en-us_topic_0000001696282289_p46051110132410">The value <strong id="dli_spark_sign__en-us_topic_0000001696282289_b192087456865623">1</strong> is returned.</p>
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<pre class="screen" id="dli_spark_sign__en-us_topic_0000001696282289_screen172911029172414">select sign(3);</pre>
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<p id="dli_spark_sign__en-us_topic_0000001696282289_p626691282413">The value <strong id="dli_spark_sign__en-us_topic_0000001696282289_b73495574954614">0</strong> is returned.</p>
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<pre class="screen" id="dli_spark_sign__en-us_topic_0000001696282289_screen742073618241">select sign(0);</pre>
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<p id="dli_spark_sign__en-us_topic_0000001696282289_p589861322418">The value <strong id="dli_spark_sign__en-us_topic_0000001696282289_b208631700165623">1</strong> is returned.</p>
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<pre class="screen" id="dli_spark_sign__en-us_topic_0000001696282289_screen1059824213248">select sign(3.1415926);</pre>
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<p id="dli_spark_sign__en-us_topic_0000001696282289_p17326816152415">The value <strong id="dli_spark_sign__en-us_topic_0000001696282289_b6100329112712">NULL</strong> is returned.</p>
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<pre class="screen" id="dli_spark_sign__en-us_topic_0000001696282289_screen143835252412">select sign(null);</pre>
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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_0473.html">Mathematical Functions</a></div>
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</div>
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</div>
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