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| <div class="title">uda-sample.cc</div> </div> |
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| <div class="contents"> |
| <a href="uda-sample_8cc.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// Copyright 2012 Cloudera Inc.</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// You may obtain a copy of the License at</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">//</span></div> |
| <div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div> |
| <div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div> |
| <div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div> |
| <div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// See the License for the specific language governing permissions and</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// limitations under the License.</span></div> |
| <div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="preprocessor">#include "<a class="code" href="uda-sample_8h.html">uda-sample.h</a>"</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="preprocessor">#include <assert.h></span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div> |
| <div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="keyword">using namespace </span>impala_udf;</div> |
| <div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div> |
| <div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">// This is a sample of implementing a COUNT aggregate function.</span></div> |
| <div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#ab0fcda6069e5bbd8fcc92cff662d4eb9"> 23</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#ab0fcda6069e5bbd8fcc92cff662d4eb9">CountInit</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <a class="code" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a>* val) {</div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span>  val-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a> = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  val-><a class="code" href="structimpala__udf_1_1BigIntVal.html#a8abd150f41ae695ad81c16eca21c1031">val</a> = 0;</div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> }</div> |
| <div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#af4dbe44a1ba19bdd6c84c94917948848"> 28</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#af4dbe44a1ba19bdd6c84c94917948848">CountUpdate</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1IntVal.html">IntVal</a>& input, <a class="code" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a>* val) {</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span>  <span class="keywordflow">if</span> (input.<a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a>) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  ++val-><a class="code" href="structimpala__udf_1_1BigIntVal.html#a8abd150f41ae695ad81c16eca21c1031">val</a>;</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> }</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div> |
| <div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#aac8e236fb6db26d075c6c434266c5b53"> 33</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#aac8e236fb6db26d075c6c434266c5b53">CountMerge</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a>& src, <a class="code" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a>* dst) {</div> |
| <div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  dst-><a class="code" href="structimpala__udf_1_1BigIntVal.html#a8abd150f41ae695ad81c16eca21c1031">val</a> += src.<a class="code" href="structimpala__udf_1_1BigIntVal.html#a8abd150f41ae695ad81c16eca21c1031">val</a>;</div> |
| <div class="line"><a name="l00035"></a><span class="lineno"> 35</span> }</div> |
| <div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div> |
| <div class="line"><a name="l00037"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#aad20429b2909a2803de721afa4e1cca2"> 37</a></span> <a class="code" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a> <a class="code" href="uda-sample_8cc.html#aad20429b2909a2803de721afa4e1cca2">CountFinalize</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1BigIntVal.html">BigIntVal</a>& val) {</div> |
| <div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keywordflow">return</span> val;</div> |
| <div class="line"><a name="l00039"></a><span class="lineno"> 39</span> }</div> |
| <div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div> |
| <div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">// This is a sample of implementing a AVG aggregate function.</span></div> |
| <div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="structAvgStruct.html"> 44</a></span> <span class="keyword">struct </span><a class="code" href="structAvgStruct.html">AvgStruct</a> {</div> |
| <div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb"> 45</a></span>  <span class="keywordtype">double</span> <a class="code" href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb">sum</a>;</div> |
| <div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8"> 46</a></span>  int64_t <a class="code" href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8">count</a>;</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> };</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span> </div> |
| <div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#a39881c9365b577a6949a5d179c071abb"> 49</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a39881c9365b577a6949a5d179c071abb">AvgInit</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <a class="code" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a>* val) {</div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  assert(<span class="keyword">sizeof</span>(<a class="code" href="structAvgStruct.html">AvgStruct</a>) == 16);</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  memset(*val, 0, <span class="keyword">sizeof</span>(<a class="code" href="structAvgStruct.html">AvgStruct</a>));</div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span> }</div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div> |
| <div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#a6555cbf9baa7a356fc1de6c595f3d48d"> 54</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a6555cbf9baa7a356fc1de6c595f3d48d">AvgUpdate</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a>& input, <a class="code" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a>* val) {</div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keywordflow">if</span> (input.<a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a>) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="structAvgStruct.html">AvgStruct</a>* avg = <span class="keyword">reinterpret_cast<</span><a class="code" href="structAvgStruct.html">AvgStruct</a>*<span class="keyword">></span>(*val);</div> |
| <div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  avg-><a class="code" href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb">sum</a> += input.<a class="code" href="structimpala__udf_1_1DoubleVal.html#ab3bafd0d4a8fd509fad59fe1f4bcfc98">val</a>;</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  ++avg-><a class="code" href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8">count</a>;</div> |
| <div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div> |
| <div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div> |
| <div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#ae22def6c9bc2f969f82012a45cab2e7e"> 61</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#ae22def6c9bc2f969f82012a45cab2e7e">AvgMerge</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a>& src, <a class="code" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a>* dst) {</div> |
| <div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordflow">if</span> (src == NULL) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">const</span> <a class="code" href="structAvgStruct.html">AvgStruct</a>* src_struct = <span class="keyword">reinterpret_cast<</span><span class="keyword">const </span><a class="code" href="structAvgStruct.html">AvgStruct</a>*<span class="keyword">></span>(src);</div> |
| <div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="structAvgStruct.html">AvgStruct</a>* dst_struct = <span class="keyword">reinterpret_cast<</span><a class="code" href="structAvgStruct.html">AvgStruct</a>*<span class="keyword">></span>(*dst);</div> |
| <div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  dst_struct-><a class="code" href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb">sum</a> += src_struct-><a class="code" href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb">sum</a>;</div> |
| <div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  dst_struct-><a class="code" href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8">count</a> += src_struct-><a class="code" href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8">count</a>;</div> |
| <div class="line"><a name="l00067"></a><span class="lineno"> 67</span> }</div> |
| <div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div> |
| <div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#a1ff44126e5fd1eede5c1863af268435d"> 69</a></span> <a class="code" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a> <a class="code" href="uda-sample_8cc.html#a1ff44126e5fd1eede5c1863af268435d">AvgFinalize</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">BufferVal</a>& val) {</div> |
| <div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">if</span> (val == NULL) <span class="keywordflow">return</span> <a class="code" href="structimpala__udf_1_1DoubleVal.html#adf467cc7bb66d03c9833cf6e8feec48f">DoubleVal::null</a>();</div> |
| <div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="structAvgStruct.html">AvgStruct</a>* val_struct = <span class="keyword">reinterpret_cast<</span><a class="code" href="structAvgStruct.html">AvgStruct</a>*<span class="keyword">></span>(val);</div> |
| <div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordflow">return</span> <a class="code" href="structimpala__udf_1_1DoubleVal.html">DoubleVal</a>(val_struct-><a class="code" href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb">sum</a> / val_struct-><a class="code" href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8">count</a>);</div> |
| <div class="line"><a name="l00073"></a><span class="lineno"> 73</span> }</div> |
| <div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </div> |
| <div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">// This is a sample of implementing the STRING_CONCAT aggregate function.</span></div> |
| <div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">// Example: select string_concat(string_col, ",") from table</span></div> |
| <div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#a1beb385e2adb1c750336e51e4feb6390"> 79</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a1beb385e2adb1c750336e51e4feb6390">StringConcatInit</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>* val) {</div> |
| <div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  val-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a> = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00081"></a><span class="lineno"> 81</span> }</div> |
| <div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div> |
| <div class="line"><a name="l00083"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#a9a5c023bfcf2f10968d52724590fbc9b"> 83</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a9a5c023bfcf2f10968d52724590fbc9b">StringConcatUpdate</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>& arg1,</div> |
| <div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>& arg2, <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>* val) {</div> |
| <div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">if</span> (val-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a>) {</div> |
| <div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  val-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a> = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  *val = <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>(context, arg1.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>);</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  memcpy(val-><a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a>, arg1.<a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a>, arg1.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>);</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  } <span class="keywordflow">else</span> {</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordtype">int</span> new_len = val-><a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a> + arg1.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a> + arg2.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>;</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a> new_val(context, new_len);</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  memcpy(new_val.<a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a>, val-><a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a>, val-><a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>);</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  memcpy(new_val.<a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a> + val-><a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>, arg2.<a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a>, arg2.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>);</div> |
| <div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  memcpy(new_val.<a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a> + val-><a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a> + arg2.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>, arg1.<a class="code" href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">ptr</a>, arg1.<a class="code" href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">len</a>);</div> |
| <div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  *val = new_val;</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> }</div> |
| <div class="line"><a name="l00098"></a><span class="lineno"> 98</span> </div> |
| <div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#a3ed721587b9868912f96ced1b1691f0f"> 99</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a3ed721587b9868912f96ced1b1691f0f">StringConcatMerge</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>& src, <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>* dst) {</div> |
| <div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (src.<a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a>) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <a class="code" href="uda-sample_8cc.html#a9a5c023bfcf2f10968d52724590fbc9b">StringConcatUpdate</a>(context, src, <span class="stringliteral">","</span>, dst);</div> |
| <div class="line"><a name="l00102"></a><span class="lineno"> 102</span> }</div> |
| <div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div> |
| <div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="uda-sample_8h.html#adb989c3d19aa394888bfe5722c835c28"> 104</a></span> <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a> <a class="code" href="uda-sample_8cc.html#adb989c3d19aa394888bfe5722c835c28">StringConcatFinalize</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* context, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1StringVal.html">StringVal</a>& val) {</div> |
| <div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> val;</div> |
| <div class="line"><a name="l00106"></a><span class="lineno"> 106</span> }</div> |
| <div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div> |
| <div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">// This is a sample of implementing the SUM aggregate function for decimals.</span></div> |
| <div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// Example: select sum_small_decimal(dec_col) from table</span></div> |
| <div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment">// It is different than the builtin sum since it can easily overflow but can</span></div> |
| <div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment">// be faster for small tables.</span></div> |
| <div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">// ---------------------------------------------------------------------------</span></div> |
| <div class="line"><a name="l00114"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#a9b2af0e473963879e13199f33da72b8c"> 114</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a9b2af0e473963879e13199f33da72b8c">SumSmallDecimalInit</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>*, <a class="code" href="structimpala__udf_1_1DecimalVal.html">DecimalVal</a>* val) {</div> |
| <div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  val-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a> = <span class="keyword">true</span>;</div> |
| <div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  val-><a class="code" href="structimpala__udf_1_1DecimalVal.html#a328187a144101e220b96f3699a663642">val4</a> = 0;</div> |
| <div class="line"><a name="l00117"></a><span class="lineno"> 117</span> }</div> |
| <div class="line"><a name="l00118"></a><span class="lineno"> 118</span> </div> |
| <div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#a2bdce2106723057cedbe51c9c01c8e32"> 119</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a2bdce2106723057cedbe51c9c01c8e32">SumSmallDecimalUpdate</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>* ctx,</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1DecimalVal.html">DecimalVal</a>& src, <a class="code" href="structimpala__udf_1_1DecimalVal.html">DecimalVal</a>* dst) {</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  assert(ctx-><a class="code" href="classimpala__udf_1_1FunctionContext.html#a982cd2abfd09cd038eb51fbc3d89366c">GetArgType</a>(0)-><a class="code" href="structimpala__udf_1_1FunctionContext_1_1TypeDesc.html#ae2505d4fdfd1db9353e3a1439f0b0452">scale</a> == 2);</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  assert(ctx-><a class="code" href="classimpala__udf_1_1FunctionContext.html#a982cd2abfd09cd038eb51fbc3d89366c">GetArgType</a>(0)-><a class="code" href="structimpala__udf_1_1FunctionContext_1_1TypeDesc.html#a4e972765ff3d2151c14349c0e1fb458f">precision</a> == 9);</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (src.<a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a>) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  dst-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a> = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  dst-><a class="code" href="structimpala__udf_1_1DecimalVal.html#a328187a144101e220b96f3699a663642">val4</a> += src.<a class="code" href="structimpala__udf_1_1DecimalVal.html#a328187a144101e220b96f3699a663642">val4</a>;</div> |
| <div class="line"><a name="l00126"></a><span class="lineno"> 126</span> }</div> |
| <div class="line"><a name="l00127"></a><span class="lineno"> 127</span> </div> |
| <div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="uda-sample_8cc.html#a662fe63c68417206d1f4affad91b1fc4"> 128</a></span> <span class="keywordtype">void</span> <a class="code" href="uda-sample_8cc.html#a662fe63c68417206d1f4affad91b1fc4">SumSmallDecimalMerge</a>(<a class="code" href="classimpala__udf_1_1FunctionContext.html">FunctionContext</a>*, <span class="keyword">const</span> <a class="code" href="structimpala__udf_1_1DecimalVal.html">DecimalVal</a>& src, <a class="code" href="structimpala__udf_1_1DecimalVal.html">DecimalVal</a>* dst) {</div> |
| <div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <span class="keywordflow">if</span> (src.<a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a>) <span class="keywordflow">return</span>;</div> |
| <div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  dst-><a class="code" href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">is_null</a> = <span class="keyword">false</span>;</div> |
| <div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  dst-><a class="code" href="structimpala__udf_1_1DecimalVal.html#a328187a144101e220b96f3699a663642">val4</a> += src.<a class="code" href="structimpala__udf_1_1DecimalVal.html#a328187a144101e220b96f3699a663642">val4</a>;</div> |
| <div class="line"><a name="l00132"></a><span class="lineno"> 132</span> }</div> |
| <div class="ttc" id="structimpala__udf_1_1FunctionContext_1_1TypeDesc_html_a4e972765ff3d2151c14349c0e1fb458f"><div class="ttname"><a href="structimpala__udf_1_1FunctionContext_1_1TypeDesc.html#a4e972765ff3d2151c14349c0e1fb458f">impala_udf::FunctionContext::TypeDesc::precision</a></div><div class="ttdeci">int precision</div><div class="ttdoc">Only valid if type == TYPE_DECIMAL. </div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00075">udf.h:75</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1DoubleVal_html_ab3bafd0d4a8fd509fad59fe1f4bcfc98"><div class="ttname"><a href="structimpala__udf_1_1DoubleVal.html#ab3bafd0d4a8fd509fad59fe1f4bcfc98">impala_udf::DoubleVal::val</a></div><div class="ttdeci">double val</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00476">udf.h:476</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a662fe63c68417206d1f4affad91b1fc4"><div class="ttname"><a href="uda-sample_8cc.html#a662fe63c68417206d1f4affad91b1fc4">SumSmallDecimalMerge</a></div><div class="ttdeci">void SumSmallDecimalMerge(FunctionContext *, const DecimalVal &src, DecimalVal *dst)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00128">uda-sample.cc:128</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a2bdce2106723057cedbe51c9c01c8e32"><div class="ttname"><a href="uda-sample_8cc.html#a2bdce2106723057cedbe51c9c01c8e32">SumSmallDecimalUpdate</a></div><div class="ttdeci">void SumSmallDecimalUpdate(FunctionContext *ctx, const DecimalVal &src, DecimalVal *dst)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00119">uda-sample.cc:119</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a9b2af0e473963879e13199f33da72b8c"><div class="ttname"><a href="uda-sample_8cc.html#a9b2af0e473963879e13199f33da72b8c">SumSmallDecimalInit</a></div><div class="ttdeci">void SumSmallDecimalInit(FunctionContext *, DecimalVal *val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00114">uda-sample.cc:114</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a9a5c023bfcf2f10968d52724590fbc9b"><div class="ttname"><a href="uda-sample_8cc.html#a9a5c023bfcf2f10968d52724590fbc9b">StringConcatUpdate</a></div><div class="ttdeci">void StringConcatUpdate(FunctionContext *context, const StringVal &arg1, const StringVal &arg2, StringVal *val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00083">uda-sample.cc:83</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1DoubleVal_html"><div class="ttname"><a href="structimpala__udf_1_1DoubleVal.html">impala_udf::DoubleVal</a></div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00475">udf.h:475</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1DecimalVal_html_a328187a144101e220b96f3699a663642"><div class="ttname"><a href="structimpala__udf_1_1DecimalVal.html#a328187a144101e220b96f3699a663642">impala_udf::DecimalVal::val4</a></div><div class="ttdeci">int32_t val4</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00570">udf.h:570</a></div></div> |
| <div class="ttc" id="namespaceimpala__udf_html_a233587ab404d9304f392b1eda6826ea5"><div class="ttname"><a href="namespaceimpala__udf.html#a233587ab404d9304f392b1eda6826ea5">impala_udf::BufferVal</a></div><div class="ttdeci">uint8_t * BufferVal</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00600">udf.h:600</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1StringVal_html_a1152442079d2471ec396076f37bf6c35"><div class="ttname"><a href="structimpala__udf_1_1StringVal.html#a1152442079d2471ec396076f37bf6c35">impala_udf::StringVal::ptr</a></div><div class="ttdeci">uint8_t * ptr</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00523">udf.h:523</a></div></div> |
| <div class="ttc" id="classimpala__udf_1_1FunctionContext_html"><div class="ttname"><a href="classimpala__udf_1_1FunctionContext.html">impala_udf::FunctionContext</a></div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00047">udf.h:47</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1AnyVal_html_aded62c6b250c62814c94271856b06cbe"><div class="ttname"><a href="structimpala__udf_1_1AnyVal.html#aded62c6b250c62814c94271856b06cbe">impala_udf::AnyVal::is_null</a></div><div class="ttdeci">bool is_null</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00359">udf.h:359</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_ab0fcda6069e5bbd8fcc92cff662d4eb9"><div class="ttname"><a href="uda-sample_8cc.html#ab0fcda6069e5bbd8fcc92cff662d4eb9">CountInit</a></div><div class="ttdeci">void CountInit(FunctionContext *context, BigIntVal *val)</div><div class="ttdoc">This is an example of the COUNT aggregate function. </div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00023">uda-sample.cc:23</a></div></div> |
| <div class="ttc" id="structAvgStruct_html_ac9634cbc99581b19a4229a91e72dc3fb"><div class="ttname"><a href="structAvgStruct.html#ac9634cbc99581b19a4229a91e72dc3fb">AvgStruct::sum</a></div><div class="ttdeci">double sum</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00045">uda-sample.cc:45</a></div></div> |
| <div class="ttc" id="classimpala__udf_1_1FunctionContext_html_a982cd2abfd09cd038eb51fbc3d89366c"><div class="ttname"><a href="classimpala__udf_1_1FunctionContext.html#a982cd2abfd09cd038eb51fbc3d89366c">impala_udf::FunctionContext::GetArgType</a></div><div class="ttdeci">const TypeDesc * GetArgType(int arg_idx) const </div><div class="ttdef"><b>Definition:</b> <a href="udf_8cc_source.html#l00425">udf.cc:425</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1FunctionContext_1_1TypeDesc_html_ae2505d4fdfd1db9353e3a1439f0b0452"><div class="ttname"><a href="structimpala__udf_1_1FunctionContext_1_1TypeDesc.html#ae2505d4fdfd1db9353e3a1439f0b0452">impala_udf::FunctionContext::TypeDesc::scale</a></div><div class="ttdeci">int scale</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00076">udf.h:76</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1DecimalVal_html"><div class="ttname"><a href="structimpala__udf_1_1DecimalVal.html">impala_udf::DecimalVal</a></div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00556">udf.h:556</a></div></div> |
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| <div class="ttc" id="structimpala__udf_1_1StringVal_html"><div class="ttname"><a href="structimpala__udf_1_1StringVal.html">impala_udf::StringVal</a></div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00521">udf.h:521</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a3ed721587b9868912f96ced1b1691f0f"><div class="ttname"><a href="uda-sample_8cc.html#a3ed721587b9868912f96ced1b1691f0f">StringConcatMerge</a></div><div class="ttdeci">void StringConcatMerge(FunctionContext *context, const StringVal &src, StringVal *dst)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00099">uda-sample.cc:99</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_aad20429b2909a2803de721afa4e1cca2"><div class="ttname"><a href="uda-sample_8cc.html#aad20429b2909a2803de721afa4e1cca2">CountFinalize</a></div><div class="ttdeci">BigIntVal CountFinalize(FunctionContext *context, const BigIntVal &val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00037">uda-sample.cc:37</a></div></div> |
| <div class="ttc" id="structAvgStruct_html"><div class="ttname"><a href="structAvgStruct.html">AvgStruct</a></div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00044">uda-sample.cc:44</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a39881c9365b577a6949a5d179c071abb"><div class="ttname"><a href="uda-sample_8cc.html#a39881c9365b577a6949a5d179c071abb">AvgInit</a></div><div class="ttdeci">void AvgInit(FunctionContext *context, BufferVal *val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00049">uda-sample.cc:49</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1IntVal_html"><div class="ttname"><a href="structimpala__udf_1_1IntVal.html">impala_udf::IntVal</a></div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00420">udf.h:420</a></div></div> |
| <div class="ttc" id="structAvgStruct_html_a31d47d23799f6bb4c7b6fa0e94d7d7a8"><div class="ttname"><a href="structAvgStruct.html#a31d47d23799f6bb4c7b6fa0e94d7d7a8">AvgStruct::count</a></div><div class="ttdeci">int64_t count</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00046">uda-sample.cc:46</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_af4dbe44a1ba19bdd6c84c94917948848"><div class="ttname"><a href="uda-sample_8cc.html#af4dbe44a1ba19bdd6c84c94917948848">CountUpdate</a></div><div class="ttdeci">void CountUpdate(FunctionContext *context, const IntVal &input, BigIntVal *val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00028">uda-sample.cc:28</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_adb989c3d19aa394888bfe5722c835c28"><div class="ttname"><a href="uda-sample_8cc.html#adb989c3d19aa394888bfe5722c835c28">StringConcatFinalize</a></div><div class="ttdeci">StringVal StringConcatFinalize(FunctionContext *context, const StringVal &val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00104">uda-sample.cc:104</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_aac8e236fb6db26d075c6c434266c5b53"><div class="ttname"><a href="uda-sample_8cc.html#aac8e236fb6db26d075c6c434266c5b53">CountMerge</a></div><div class="ttdeci">void CountMerge(FunctionContext *context, const BigIntVal &src, BigIntVal *dst)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00033">uda-sample.cc:33</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1BigIntVal_html"><div class="ttname"><a href="structimpala__udf_1_1BigIntVal.html">impala_udf::BigIntVal</a></div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00439">udf.h:439</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a1beb385e2adb1c750336e51e4feb6390"><div class="ttname"><a href="uda-sample_8cc.html#a1beb385e2adb1c750336e51e4feb6390">StringConcatInit</a></div><div class="ttdeci">void StringConcatInit(FunctionContext *context, StringVal *val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00079">uda-sample.cc:79</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_ae22def6c9bc2f969f82012a45cab2e7e"><div class="ttname"><a href="uda-sample_8cc.html#ae22def6c9bc2f969f82012a45cab2e7e">AvgMerge</a></div><div class="ttdeci">void AvgMerge(FunctionContext *context, const BufferVal &src, BufferVal *dst)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00061">uda-sample.cc:61</a></div></div> |
| <div class="ttc" id="uda-sample_8h_html"><div class="ttname"><a href="uda-sample_8h.html">uda-sample.h</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1DoubleVal_html_adf467cc7bb66d03c9833cf6e8feec48f"><div class="ttname"><a href="structimpala__udf_1_1DoubleVal.html#adf467cc7bb66d03c9833cf6e8feec48f">impala_udf::DoubleVal::null</a></div><div class="ttdeci">static DoubleVal null()</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00480">udf.h:480</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a6555cbf9baa7a356fc1de6c595f3d48d"><div class="ttname"><a href="uda-sample_8cc.html#a6555cbf9baa7a356fc1de6c595f3d48d">AvgUpdate</a></div><div class="ttdeci">void AvgUpdate(FunctionContext *context, const DoubleVal &input, BufferVal *val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00054">uda-sample.cc:54</a></div></div> |
| <div class="ttc" id="structimpala__udf_1_1StringVal_html_a72a872d5acebca872db6bd37eb4ae184"><div class="ttname"><a href="structimpala__udf_1_1StringVal.html#a72a872d5acebca872db6bd37eb4ae184">impala_udf::StringVal::len</a></div><div class="ttdeci">int len</div><div class="ttdef"><b>Definition:</b> <a href="udf_8h_source.html#l00522">udf.h:522</a></div></div> |
| <div class="ttc" id="uda-sample_8cc_html_a1ff44126e5fd1eede5c1863af268435d"><div class="ttname"><a href="uda-sample_8cc.html#a1ff44126e5fd1eede5c1863af268435d">AvgFinalize</a></div><div class="ttdeci">DoubleVal AvgFinalize(FunctionContext *context, const BufferVal &val)</div><div class="ttdef"><b>Definition:</b> <a href="uda-sample_8cc_source.html#l00069">uda-sample.cc:69</a></div></div> |
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