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| <div class="textblock"><code>#include <<a class="el" href="udf_8h_source.html">udf/udf.h</a>></code><br/> |
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| Functions</h2></td></tr> |
| <tr class="memitem:ab0fcda6069e5bbd8fcc92cff662d4eb9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#ab0fcda6069e5bbd8fcc92cff662d4eb9">CountInit</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> *val)</td></tr> |
| <tr class="memdesc:ab0fcda6069e5bbd8fcc92cff662d4eb9"><td class="mdescLeft"> </td><td class="mdescRight">This is an example of the COUNT aggregate function. <a href="#ab0fcda6069e5bbd8fcc92cff662d4eb9">More...</a><br/></td></tr> |
| <tr class="separator:ab0fcda6069e5bbd8fcc92cff662d4eb9"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:af4dbe44a1ba19bdd6c84c94917948848"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#af4dbe44a1ba19bdd6c84c94917948848">CountUpdate</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1IntVal.html">IntVal</a> &input, <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> *val)</td></tr> |
| <tr class="separator:af4dbe44a1ba19bdd6c84c94917948848"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:aac8e236fb6db26d075c6c434266c5b53"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#aac8e236fb6db26d075c6c434266c5b53">CountMerge</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> &src, <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> *dst)</td></tr> |
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| <tr class="memitem:aad20429b2909a2803de721afa4e1cca2"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#aad20429b2909a2803de721afa4e1cca2">CountFinalize</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> &val)</td></tr> |
| <tr class="separator:aad20429b2909a2803de721afa4e1cca2"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a39881c9365b577a6949a5d179c071abb"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#a39881c9365b577a6949a5d179c071abb">AvgInit</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> *val)</td></tr> |
| <tr class="separator:a39881c9365b577a6949a5d179c071abb"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a6555cbf9baa7a356fc1de6c595f3d48d"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#a6555cbf9baa7a356fc1de6c595f3d48d">AvgUpdate</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a> &input, <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> *val)</td></tr> |
| <tr class="separator:a6555cbf9baa7a356fc1de6c595f3d48d"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:ae22def6c9bc2f969f82012a45cab2e7e"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#ae22def6c9bc2f969f82012a45cab2e7e">AvgMerge</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> &src, <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> *dst)</td></tr> |
| <tr class="separator:ae22def6c9bc2f969f82012a45cab2e7e"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a1ff44126e5fd1eede5c1863af268435d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#a1ff44126e5fd1eede5c1863af268435d">AvgFinalize</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> &val)</td></tr> |
| <tr class="separator:a1ff44126e5fd1eede5c1863af268435d"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a1beb385e2adb1c750336e51e4feb6390"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#a1beb385e2adb1c750336e51e4feb6390">StringConcatInit</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> *val)</td></tr> |
| <tr class="separator:a1beb385e2adb1c750336e51e4feb6390"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a9a5c023bfcf2f10968d52724590fbc9b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#a9a5c023bfcf2f10968d52724590fbc9b">StringConcatUpdate</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> &arg1, const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> &arg2, <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> *val)</td></tr> |
| <tr class="separator:a9a5c023bfcf2f10968d52724590fbc9b"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:a3ed721587b9868912f96ced1b1691f0f"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#a3ed721587b9868912f96ced1b1691f0f">StringConcatMerge</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> &src, <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> *dst)</td></tr> |
| <tr class="separator:a3ed721587b9868912f96ced1b1691f0f"><td class="memSeparator" colspan="2"> </td></tr> |
| <tr class="memitem:adb989c3d19aa394888bfe5722c835c28"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="uda-sample_8h.html#adb989c3d19aa394888bfe5722c835c28">StringConcatFinalize</a> (<a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> *context, const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> &val)</td></tr> |
| <tr class="separator:adb989c3d19aa394888bfe5722c835c28"><td class="memSeparator" colspan="2"> </td></tr> |
| </table> |
| <h2 class="groupheader">Function Documentation</h2> |
| <a class="anchor" id="a1ff44126e5fd1eede5c1863af268435d"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname"><a class="el" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a> AvgFinalize </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> & </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00069">69</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>References <a class="el" href="uda-sample_8cc_source.html#l00046">AvgStruct::count</a>, <a class="el" href="udf_8h_source.html#l00480">impala_udf::DoubleVal::null()</a>, and <a class="el" href="uda-sample_8cc_source.html#l00045">AvgStruct::sum</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00054">TestAvg()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a39881c9365b577a6949a5d179c071abb"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void AvgInit </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> * </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>This is an example of the AVG(double) aggregate function. This function needs to maintain two pieces of state, the current sum and the count. We do this using the BufferVal intermediate type. When this UDA is registered, it would specify 16 bytes (8 byte sum + 8 byte count) as the size for this buffer. </p> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00049">49</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00054">TestAvg()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="ae22def6c9bc2f969f82012a45cab2e7e"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void AvgMerge </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> & </td> |
| <td class="paramname"><em>src</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> * </td> |
| <td class="paramname"><em>dst</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00061">61</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>References <a class="el" href="uda-sample_8cc_source.html#l00046">AvgStruct::count</a>, and <a class="el" href="uda-sample_8cc_source.html#l00045">AvgStruct::sum</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00054">TestAvg()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a6555cbf9baa7a356fc1de6c595f3d48d"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void AvgUpdate </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a> & </td> |
| <td class="paramname"><em>input</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a> * </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00054">54</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>References <a class="el" href="uda-sample_8cc_source.html#l00046">AvgStruct::count</a>, <a class="el" href="udf_8h_source.html#l00359">impala_udf::AnyVal::is_null</a>, <a class="el" href="uda-sample_8cc_source.html#l00045">AvgStruct::sum</a>, and <a class="el" href="udf_8h_source.html#l00476">impala_udf::DoubleVal::val</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00054">TestAvg()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="aad20429b2909a2803de721afa4e1cca2"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname"><a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> CountFinalize </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> & </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-test_8cc_source.html#l00049">49</a> of file <a class="el" href="uda-test_8cc_source.html">uda-test.cc</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-test_8cc_source.html#l00220">TEST()</a>, and <a class="el" href="uda-sample-test_8cc_source.html#l00025">TestCount()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="ab0fcda6069e5bbd8fcc92cff662d4eb9"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void CountInit </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> * </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>This is an example of the COUNT aggregate function. </p> |
| |
| <p>Definition at line <a class="el" href="uda-test_8cc_source.html#l00034">34</a> of file <a class="el" href="uda-test_8cc_source.html">uda-test.cc</a>.</p> |
| |
| <p>References <a class="el" href="udf_8h_source.html#l00359">impala_udf::AnyVal::is_null</a>, and <a class="el" href="udf_8h_source.html#l00440">impala_udf::BigIntVal::val</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-test_8cc_source.html#l00220">TEST()</a>, and <a class="el" href="uda-sample-test_8cc_source.html#l00025">TestCount()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="aac8e236fb6db26d075c6c434266c5b53"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void CountMerge </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> & </td> |
| <td class="paramname"><em>src</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> * </td> |
| <td class="paramname"><em>dst</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-test_8cc_source.html#l00045">45</a> of file <a class="el" href="uda-test_8cc_source.html">uda-test.cc</a>.</p> |
| |
| <p>References <a class="el" href="udf_8h_source.html#l00440">impala_udf::BigIntVal::val</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-test_8cc_source.html#l00220">TEST()</a>, and <a class="el" href="uda-sample-test_8cc_source.html#l00025">TestCount()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="af4dbe44a1ba19bdd6c84c94917948848"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void CountUpdate </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1IntVal.html">IntVal</a> & </td> |
| <td class="paramname"><em>input</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> * </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-test_8cc_source.html#l00039">39</a> of file <a class="el" href="uda-test_8cc_source.html">uda-test.cc</a>.</p> |
| |
| <p>References <a class="el" href="udf_8h_source.html#l00359">impala_udf::AnyVal::is_null</a>, and <a class="el" href="udf_8h_source.html#l00440">impala_udf::BigIntVal::val</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-test_8cc_source.html#l00220">TEST()</a>, and <a class="el" href="uda-sample-test_8cc_source.html#l00025">TestCount()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="adb989c3d19aa394888bfe5722c835c28"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname"><a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> StringConcatFinalize </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> & </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00104">104</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00070">TestStringConcat()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a1beb385e2adb1c750336e51e4feb6390"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void StringConcatInit </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> * </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| <p>This is a sample of implementing the STRING_CONCAT aggregate function. Example: select string_concat(string_col, ",") from table </p> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00079">79</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>References <a class="el" href="udf_8h_source.html#l00359">impala_udf::AnyVal::is_null</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00070">TestStringConcat()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a3ed721587b9868912f96ced1b1691f0f"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void StringConcatMerge </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> & </td> |
| <td class="paramname"><em>src</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> * </td> |
| <td class="paramname"><em>dst</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00099">99</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>References <a class="el" href="udf_8h_source.html#l00359">impala_udf::AnyVal::is_null</a>, and <a class="el" href="uda-sample_8cc_source.html#l00083">StringConcatUpdate()</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample-test_8cc_source.html#l00070">TestStringConcat()</a>.</p> |
| |
| </div> |
| </div> |
| <a class="anchor" id="a9a5c023bfcf2f10968d52724590fbc9b"></a> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">void StringConcatUpdate </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a> * </td> |
| <td class="paramname"><em>context</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> & </td> |
| <td class="paramname"><em>arg1</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const <a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> & </td> |
| <td class="paramname"><em>arg2</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="structimpala__udf_1_1StringVal.html">StringVal</a> * </td> |
| <td class="paramname"><em>val</em> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td> |
| </tr> |
| </table> |
| </div><div class="memdoc"> |
| |
| <p>Definition at line <a class="el" href="uda-sample_8cc_source.html#l00083">83</a> of file <a class="el" href="uda-sample_8cc_source.html">uda-sample.cc</a>.</p> |
| |
| <p>References <a class="el" href="udf_8h_source.html#l00359">impala_udf::AnyVal::is_null</a>, <a class="el" href="udf_8h_source.html#l00522">impala_udf::StringVal::len</a>, and <a class="el" href="udf_8h_source.html#l00523">impala_udf::StringVal::ptr</a>.</p> |
| |
| <p>Referenced by <a class="el" href="uda-sample_8cc_source.html#l00099">StringConcatMerge()</a>, and <a class="el" href="uda-sample-test_8cc_source.html#l00070">TestStringConcat()</a>.</p> |
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