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 <div class="header">
   <div class="summary">
 <a href="#pub-methods">Public Member Functions</a> &#124;
 <a href="#pub-static-methods">Static Public Member Functions</a> &#124;
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 <p><code>#include &lt;<a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>&gt;</code></p>
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 Collaboration diagram for impala::DecimalUtil:</div>
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 <table class="memberdecls">
 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
 Public Member Functions</h2></td></tr>
 <tr class="memitem:a64789c15eb7b6573a5b2e1a848189461"><td class="memTemplParams" colspan="2">template&lt;&gt; </td></tr>
 <tr class="memitem:a64789c15eb7b6573a5b2e1a848189461"><td class="memTemplItemLeft" align="right" valign="top">int32_t&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#a64789c15eb7b6573a5b2e1a848189461">GetScaleMultiplier</a> (int scale)</td></tr>
 <tr class="separator:a64789c15eb7b6573a5b2e1a848189461"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:a5d153a15e5f34b7ad7ac81f5db2eed6f"><td class="memTemplParams" colspan="2">template&lt;&gt; </td></tr>
 <tr class="memitem:a5d153a15e5f34b7ad7ac81f5db2eed6f"><td class="memTemplItemLeft" align="right" valign="top">int64_t&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#a5d153a15e5f34b7ad7ac81f5db2eed6f">GetScaleMultiplier</a> (int scale)</td></tr>
 <tr class="separator:a5d153a15e5f34b7ad7ac81f5db2eed6f"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:a2e58063fb2153ced474f1b78ee5b4174"><td class="memTemplParams" colspan="2">template&lt;&gt; </td></tr>
 <tr class="memitem:a2e58063fb2153ced474f1b78ee5b4174"><td class="memTemplItemLeft" align="right" valign="top"><a class="el" href="namespaceimpala.html#a537700995e6d739a40c327c0354e6869">int128_t</a>&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#a2e58063fb2153ced474f1b78ee5b4174">GetScaleMultiplier</a> (int scale)</td></tr>
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 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-methods"></a>
 Static Public Member Functions</h2></td></tr>
 <tr class="memitem:ad543a69d1d8d3d23958fa399b356181e"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#ad543a69d1d8d3d23958fa399b356181e">InitMaxUnscaledDecimal</a> ()</td></tr>
 <tr class="memdesc:ad543a69d1d8d3d23958fa399b356181e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Initializes MAX_UNSCALED_DECIMAL. Must be called once before using it.  <a href="#ad543a69d1d8d3d23958fa399b356181e">More...</a><br/></td></tr>
 <tr class="separator:ad543a69d1d8d3d23958fa399b356181e"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:a7f6b24c45ffb69ad718cc246e570dcf0"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
 <tr class="memitem:a7f6b24c45ffb69ad718cc246e570dcf0"><td class="memTemplItemLeft" align="right" valign="top">static T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#a7f6b24c45ffb69ad718cc246e570dcf0">MultiplyByScale</a> (const T &amp;v, const <a class="el" href="structimpala_1_1ColumnType.html">ColumnType</a> &amp;t)</td></tr>
 <tr class="memdesc:a7f6b24c45ffb69ad718cc246e570dcf0"><td class="mdescLeft">&#160;</td><td class="mdescRight">TODO: do we need to handle overflow here or at a higher abstraction.  <a href="#a7f6b24c45ffb69ad718cc246e570dcf0">More...</a><br/></td></tr>
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 <tr class="memitem:ac02cb6a4e30f55e693a9d4ecb255e17c"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
 <tr class="memitem:ac02cb6a4e30f55e693a9d4ecb255e17c"><td class="memTemplItemLeft" align="right" valign="top">static T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#ac02cb6a4e30f55e693a9d4ecb255e17c">MultiplyByScale</a> (const T &amp;v, int scale)</td></tr>
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 <tr class="memitem:adeb9e64b39625738584ef70c05b32d42"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
 <tr class="memitem:adeb9e64b39625738584ef70c05b32d42"><td class="memTemplItemLeft" align="right" valign="top">static T&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#adeb9e64b39625738584ef70c05b32d42">GetScaleMultiplier</a> (int scale)</td></tr>
 <tr class="separator:adeb9e64b39625738584ef70c05b32d42"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:a47dc592cb2be53cc253faf010f51ba3b"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
 <tr class="memitem:a47dc592cb2be53cc253faf010f51ba3b"><td class="memTemplItemLeft" align="right" valign="top">static void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#a47dc592cb2be53cc253faf010f51ba3b">EncodeToFixedLenByteArray</a> (uint8_t *buffer, int fixed_len_size, const T &amp;v)</td></tr>
 <tr class="memdesc:a47dc592cb2be53cc253faf010f51ba3b"><td class="mdescLeft">&#160;</td><td class="mdescRight">Write decimals as big endian (byte comparable) in fixed_len_size bytes.  <a href="#a47dc592cb2be53cc253faf010f51ba3b">More...</a><br/></td></tr>
 <tr class="separator:a47dc592cb2be53cc253faf010f51ba3b"><td class="memSeparator" colspan="2">&#160;</td></tr>
 <tr class="memitem:af5e3c8cf42a3f0756eb5637ffc37aea1"><td class="memTemplParams" colspan="2">template&lt;typename T &gt; </td></tr>
 <tr class="memitem:af5e3c8cf42a3f0756eb5637ffc37aea1"><td class="memTemplItemLeft" align="right" valign="top">static void&#160;</td><td class="memTemplItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#af5e3c8cf42a3f0756eb5637ffc37aea1">DecodeFromFixedLenByteArray</a> (const uint8_t *buffer, int fixed_len_size, T *v)</td></tr>
 <tr class="separator:af5e3c8cf42a3f0756eb5637ffc37aea1"><td class="memSeparator" colspan="2">&#160;</td></tr>
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 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-static-attribs"></a>
 Static Public Attributes</h2></td></tr>
 <tr class="memitem:aeabfb39e7ddbe3d629c662411ddfdff6"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="namespaceimpala.html#a537700995e6d739a40c327c0354e6869">int128_t</a>&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="classimpala_1_1DecimalUtil.html#aeabfb39e7ddbe3d629c662411ddfdff6">MAX_UNSCALED_DECIMAL</a></td></tr>
 <tr class="memdesc:aeabfb39e7ddbe3d629c662411ddfdff6"><td class="mdescLeft">&#160;</td><td class="mdescRight">Maximum absolute value of int128_t that we use. This is 38 digits of 9's.  <a href="#aeabfb39e7ddbe3d629c662411ddfdff6">More...</a><br/></td></tr>
 <tr class="separator:aeabfb39e7ddbe3d629c662411ddfdff6"><td class="memSeparator" colspan="2">&#160;</td></tr>
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 <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
 <div class="textblock">
 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00029">29</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>
 </div><h2 class="groupheader">Member Function Documentation</h2>
 <a class="anchor" id="af5e3c8cf42a3f0756eb5637ffc37aea1"></a>
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           <td class="memname">static void impala::DecimalUtil::DecodeFromFixedLenByteArray </td>
           <td>(</td>
           <td class="paramtype">const uint8_t *&#160;</td>
           <td class="paramname"><em>buffer</em>, </td>
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           <td class="paramkey"></td>
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           <td class="paramtype">int&#160;</td>
           <td class="paramname"><em>fixed_len_size</em>, </td>
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           <td class="paramkey"></td>
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           <td class="paramtype">T *&#160;</td>
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 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00087">87</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>References <a class="el" href="bit-util_8h_source.html#l00149">impala::BitUtil::ByteSwap()</a>.</p>

 <p>Referenced by <a class="el" href="parquet-common_8h_source.html#l00302">impala::ParquetPlainEncoder::Decode()</a>, and <a class="el" href="literal_8cc_source.html#l00031">impala::Literal::Literal()</a>.</p>

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           <td>(</td>
           <td class="paramtype">uint8_t *&#160;</td>
           <td class="paramname"><em>buffer</em>, </td>
         </tr>
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           <td class="paramkey"></td>
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           <td class="paramtype">int&#160;</td>
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 <p>Write decimals as big endian (byte comparable) in fixed_len_size bytes. </p>

 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00061">61</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>References <a class="el" href="bit-util_8h_source.html#l00149">impala::BitUtil::ByteSwap()</a>.</p>

 <p>Referenced by <a class="el" href="parquet-common_8h_source.html#l00281">impala::ParquetPlainEncoder::Encode()</a>.</p>

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           <td class="memname">static T impala::DecimalUtil::GetScaleMultiplier </td>
           <td>(</td>
           <td class="paramtype">int&#160;</td>
           <td class="paramname"><em>scale</em></td><td>)</td>
           <td></td>
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 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00050">50</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

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           <td class="memname">int32_t impala::DecimalUtil::GetScaleMultiplier </td>
           <td>(</td>
           <td class="paramtype">int&#160;</td>
           <td class="paramname"><em>scale</em></td><td>)</td>
           <td></td>
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 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00109">109</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>References <a class="el" href="compiler-util_8h_source.html#l00032">LIKELY</a>, and <a class="el" href="types_8h_source.html#l00075">impala::ColumnType::MAX_DECIMAL4_PRECISION</a>.</p>

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           <td class="memname">int64_t impala::DecimalUtil::GetScaleMultiplier </td>
           <td>(</td>
           <td class="paramtype">int&#160;</td>
           <td class="paramname"><em>scale</em></td><td>)</td>
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 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00128">128</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>References <a class="el" href="compiler-util_8h_source.html#l00032">LIKELY</a>, and <a class="el" href="types_8h_source.html#l00077">impala::ColumnType::MAX_DECIMAL8_PRECISION</a>.</p>

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           <td class="memname"><a class="el" href="namespaceimpala.html#a537700995e6d739a40c327c0354e6869">int128_t</a> impala::DecimalUtil::GetScaleMultiplier </td>
           <td>(</td>
           <td class="paramtype">int&#160;</td>
           <td class="paramname"><em>scale</em></td><td>)</td>
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 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00156">156</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>References <a class="el" href="compiler-util_8h_source.html#l00032">LIKELY</a>, and <a class="el" href="types_8h_source.html#l00071">impala::ColumnType::MAX_PRECISION</a>.</p>

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 <p>Initializes MAX_UNSCALED_DECIMAL. Must be called once before using it. </p>

 <p>Definition at line <a class="el" href="decimal-util_8cc_source.html#l00022">22</a> of file <a class="el" href="decimal-util_8cc_source.html">decimal-util.cc</a>.</p>

 <p>References <a class="el" href="types_8h_source.html#l00071">impala::ColumnType::MAX_PRECISION</a>, and <a class="el" href="decimal-util_8h_source.html#l00032">MAX_UNSCALED_DECIMAL</a>.</p>

 <p>Referenced by <a class="el" href="aggregate-functions-test_8cc_source.html#l00165">main()</a>.</p>

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 <p>TODO: do we need to handle overflow here or at a higher abstraction. </p>

 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00039">39</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>References <a class="el" href="types_8h_source.html#l00068">impala::ColumnType::scale</a>, <a class="el" href="types_8h_source.html#l00060">impala::ColumnType::type</a>, and <a class="el" href="types_8h_source.html#l00042">impala::TYPE_DECIMAL</a>.</p>

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 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00045">45</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

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           <td class="memname"><a class="el" href="namespaceimpala.html#a537700995e6d739a40c327c0354e6869">int128_t</a> impala::DecimalUtil::MAX_UNSCALED_DECIMAL</td>
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 <p>Maximum absolute value of int128_t that we use. This is 38 digits of 9's. </p>

 <p>Definition at line <a class="el" href="decimal-util_8h_source.html#l00032">32</a> of file <a class="el" href="decimal-util_8h_source.html">decimal-util.h</a>.</p>

 <p>Referenced by <a class="el" href="decimal-value_8h_source.html#l00147">impala::DecimalValue&lt; int128_t &gt;::Add()</a>, <a class="el" href="decimal-value_8h_source.html#l00319">impala::DecimalValue&lt; int128_t &gt;::AdjustToSameScale()</a>, <a class="el" href="decimal-value_8h_source.html#l00205">impala::DecimalValue&lt; int128_t &gt;::Divide()</a>, <a class="el" href="decimal-util_8cc_source.html#l00022">InitMaxUnscaledDecimal()</a>, <a class="el" href="decimal-value_8h_source.html#l00174">impala::DecimalValue&lt; int128_t &gt;::Multiply()</a>, <a class="el" href="decimal-operators_8cc_source.html#l00306">impala::DecimalOperators::RoundDecimalNegativeScale()</a>, <a class="el" href="aggregate-functions-test_8cc_source.html#l00113">TEST()</a>, and <a class="el" href="decimal-test_8cc_source.html#l00258">impala::TEST()</a>.</p>

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