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| <div class="headertitle"><div class="title">prefetch_file_batch_reader.h</div></div> |
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| <a href="prefetch__file__batch__reader_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span><span class="comment">/*</span></div> |
| <div class="line"><a id="l00002" name="l00002"></a><span class="lineno"> 2</span><span class="comment"> * Licensed to the Apache Software Foundation (ASF) under one</span></div> |
| <div class="line"><a id="l00003" name="l00003"></a><span class="lineno"> 3</span><span class="comment"> * or more contributor license agreements. See the NOTICE file</span></div> |
| <div class="line"><a id="l00004" name="l00004"></a><span class="lineno"> 4</span><span class="comment"> * distributed with this work for additional information</span></div> |
| <div class="line"><a id="l00005" name="l00005"></a><span class="lineno"> 5</span><span class="comment"> * regarding copyright ownership. The ASF licenses this file</span></div> |
| <div class="line"><a id="l00006" name="l00006"></a><span class="lineno"> 6</span><span class="comment"> * to you under the Apache License, Version 2.0 (the</span></div> |
| <div class="line"><a id="l00007" name="l00007"></a><span class="lineno"> 7</span><span class="comment"> * "License"); you may not use this file except in compliance</span></div> |
| <div class="line"><a id="l00008" name="l00008"></a><span class="lineno"> 8</span><span class="comment"> * with the License. You may obtain a copy of the License at</span></div> |
| <div class="line"><a id="l00009" name="l00009"></a><span class="lineno"> 9</span><span class="comment"> *</span></div> |
| <div class="line"><a id="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span></div> |
| <div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="comment"> *</span></div> |
| <div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span><span class="comment"> * Unless required by applicable law or agreed to in writing,</span></div> |
| <div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="comment"> * software distributed under the License is distributed on an</span></div> |
| <div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</span></div> |
| <div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="comment"> * KIND, either express or implied. See the License for the</span></div> |
| <div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="comment"> * specific language governing permissions and limitations</span></div> |
| <div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="comment"> * under the License.</span></div> |
| <div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="comment"> */</span></div> |
| <div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div> |
| <div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#pragma once</span></div> |
| <div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span> </div> |
| <div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span><span class="preprocessor">#include <memory></span></div> |
| <div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="preprocessor">#include <utility></span></div> |
| <div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="preprocessor">#include <vector></span></div> |
| <div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span> </div> |
| <div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="preprocessor">#include "<a class="code" href="file__batch__reader_8h.html">paimon/reader/file_batch_reader.h</a>"</span></div> |
| <div class="line"><a id="l00027" name="l00027"></a><span class="lineno"> 27</span> </div> |
| <div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">namespace </span><a class="code hl_namespace" href="namespacepaimon.html">paimon</a> {</div> |
| <div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div> |
| <div class="foldopen" id="foldopen00033" data-start="{" data-end="};"> |
| <div class="line"><a id="l00033" name="l00033"></a><span class="lineno"><a class="line" href="classpaimon_1_1_prefetch_file_batch_reader.html"> 33</a></span><span class="keyword">class </span><a class="code hl_define" href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">PAIMON_EXPORT</a> <a class="code hl_class" href="classpaimon_1_1_prefetch_file_batch_reader.html">PrefetchFileBatchReader</a> : <span class="keyword">public</span> <a class="code hl_class" href="classpaimon_1_1_file_batch_reader.html">FileBatchReader</a> {</div> |
| <div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">public</span>:</div> |
| <div class="line"><a id="l00038" name="l00038"></a><span class="lineno"><a class="line" href="classpaimon_1_1_prefetch_file_batch_reader.html#a66a9334bd1dfe45e20040116ca4c53e2"> 38</a></span> <span class="keyword">virtual</span> <a class="code hl_class" href="classpaimon_1_1_status.html">Status</a> <a class="code hl_function" href="classpaimon_1_1_prefetch_file_batch_reader.html#a66a9334bd1dfe45e20040116ca4c53e2">SeekToRow</a>(<a class="code hl_define" href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">uint64_t</a> <a class="code hl_define" href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">row_number</a>) = 0;</div> |
| <div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span> </div> |
| <div class="line"><a id="l00043" name="l00043"></a><span class="lineno"><a class="line" href="classpaimon_1_1_prefetch_file_batch_reader.html#a8167dd4af27a9a4ae20581cf2dccfadd"> 43</a></span> <span class="keyword">virtual</span> <a class="code hl_define" href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">uint64_t</a> <a class="code hl_function" href="classpaimon_1_1_prefetch_file_batch_reader.html#a8167dd4af27a9a4ae20581cf2dccfadd">GetNextRowToRead</a>() <span class="keyword">const</span> = 0;</div> |
| <div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> </div> |
| <div class="line"><a id="l00066" name="l00066"></a><span class="lineno"><a class="line" href="classpaimon_1_1_prefetch_file_batch_reader.html#a69e71fd2021a1da2fe53c89a72e06596"> 66</a></span> <span class="keyword">virtual</span> <a class="code hl_class" href="classpaimon_1_1_result.html">Result<std::vector<std::pair<uint64_t, uint64_t></a>>> <a class="code hl_function" href="classpaimon_1_1_prefetch_file_batch_reader.html#a69e71fd2021a1da2fe53c89a72e06596">GenReadRanges</a>(</div> |
| <div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordtype">bool</span>* <a class="code hl_define" href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">need_prefetch</a>) <span class="keyword">const</span> = 0;</div> |
| <div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> </div> |
| <div class="line"><a id="l00076" name="l00076"></a><span class="lineno"><a class="line" href="classpaimon_1_1_prefetch_file_batch_reader.html#ac3352521fbeb92b417f685ee8230bca6"> 76</a></span> <span class="keyword">virtual</span> <a class="code hl_class" href="classpaimon_1_1_status.html">Status</a> <a class="code hl_function" href="classpaimon_1_1_prefetch_file_batch_reader.html#ac3352521fbeb92b417f685ee8230bca6">SetReadRanges</a>(<span class="keyword">const</span> std::vector<std::pair<uint64_t, uint64_t>>& <a class="code hl_define" href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">read_ranges</a>) = 0;</div> |
| <div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> </div> |
| <div class="foldopen" id="foldopen00094" data-start="{" data-end="}"> |
| <div class="line"><a id="l00094" name="l00094"></a><span class="lineno"><a class="line" href="classpaimon_1_1_prefetch_file_batch_reader.html#af0e9acc0b5cd69f720e47a74287c7b71"> 94</a></span> <span class="keyword">virtual</span> <a class="code hl_class" href="classpaimon_1_1_result.html">Result<std::vector<std::pair<uint64_t, uint64_t></a>>> <a class="code hl_function" href="classpaimon_1_1_prefetch_file_batch_reader.html#af0e9acc0b5cd69f720e47a74287c7b71">PreBufferRange</a>() {</div> |
| <div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> <span class="keywordflow">return</span> std::vector<std::pair<uint64_t, uint64_t>>{};</div> |
| <div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> }</div> |
| </div> |
| <div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span>};</div> |
| </div> |
| <div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> </div> |
| <div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span>} <span class="comment">// namespace paimon</span></div> |
| <div class="ttc" id="aclasspaimon_1_1_file_batch_reader_html"><div class="ttname"><a href="classpaimon_1_1_file_batch_reader.html">paimon::FileBatchReader</a></div><div class="ttdoc">The batch reader for a single file supports returning the line number of the last batch read for dele...</div><div class="ttdef"><b>Definition</b> file_batch_reader.h:32</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_prefetch_file_batch_reader_html"><div class="ttname"><a href="classpaimon_1_1_prefetch_file_batch_reader.html">paimon::PrefetchFileBatchReader</a></div><div class="ttdoc">The prefetch file batch reader extends the basic FileBatchReader interface for prefetch read,...</div><div class="ttdef"><b>Definition</b> prefetch_file_batch_reader.h:33</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_prefetch_file_batch_reader_html_a66a9334bd1dfe45e20040116ca4c53e2"><div class="ttname"><a href="classpaimon_1_1_prefetch_file_batch_reader.html#a66a9334bd1dfe45e20040116ca4c53e2">paimon::PrefetchFileBatchReader::SeekToRow</a></div><div class="ttdeci">virtual Status SeekToRow(uint64_t row_number)=0</div><div class="ttdoc">Seeks to a specific row in the file.</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_prefetch_file_batch_reader_html_a69e71fd2021a1da2fe53c89a72e06596"><div class="ttname"><a href="classpaimon_1_1_prefetch_file_batch_reader.html#a69e71fd2021a1da2fe53c89a72e06596">paimon::PrefetchFileBatchReader::GenReadRanges</a></div><div class="ttdeci">virtual Result< std::vector< std::pair< uint64_t, uint64_t > > > GenReadRanges(bool *need_prefetch) const =0</div><div class="ttdoc">Generates a list of row ranges to be read in batches.</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_prefetch_file_batch_reader_html_a8167dd4af27a9a4ae20581cf2dccfadd"><div class="ttname"><a href="classpaimon_1_1_prefetch_file_batch_reader.html#a8167dd4af27a9a4ae20581cf2dccfadd">paimon::PrefetchFileBatchReader::GetNextRowToRead</a></div><div class="ttdeci">virtual uint64_t GetNextRowToRead() const =0</div><div class="ttdoc">Retrieves the row number of the next row to be read.</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_prefetch_file_batch_reader_html_ac3352521fbeb92b417f685ee8230bca6"><div class="ttname"><a href="classpaimon_1_1_prefetch_file_batch_reader.html#ac3352521fbeb92b417f685ee8230bca6">paimon::PrefetchFileBatchReader::SetReadRanges</a></div><div class="ttdeci">virtual Status SetReadRanges(const std::vector< std::pair< uint64_t, uint64_t > > &read_ranges)=0</div><div class="ttdoc">Sets the specific row ranges as a hint to be read from format file.</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_prefetch_file_batch_reader_html_af0e9acc0b5cd69f720e47a74287c7b71"><div class="ttname"><a href="classpaimon_1_1_prefetch_file_batch_reader.html#af0e9acc0b5cd69f720e47a74287c7b71">paimon::PrefetchFileBatchReader::PreBufferRange</a></div><div class="ttdeci">virtual Result< std::vector< std::pair< uint64_t, uint64_t > > > PreBufferRange()</div><div class="ttdoc">Returns a list of file offset/length ranges that should be prefetched for the current read scenario.</div><div class="ttdef"><b>Definition</b> prefetch_file_batch_reader.h:94</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_result_html"><div class="ttname"><a href="classpaimon_1_1_result.html">paimon::Result</a></div><div class="ttdoc">A Result<T> object holds either a value of type T or a Status object explaining why such a value is n...</div><div class="ttdef"><b>Definition</b> result.h:33</div></div> |
| <div class="ttc" id="aclasspaimon_1_1_status_html"><div class="ttname"><a href="classpaimon_1_1_status.html">paimon::Status</a></div><div class="ttdoc">Status outcome object (success or error)</div><div class="ttdef"><b>Definition</b> status.h:92</div></div> |
| <div class="ttc" id="afile__batch__reader_8h_html"><div class="ttname"><a href="file__batch__reader_8h.html">file_batch_reader.h</a></div></div> |
| <div class="ttc" id="amemory__pool_8h_html_a147ba4ba34a215b3a4f3a95c1ee11704"><div class="ttname"><a href="memory__pool_8h.html#a147ba4ba34a215b3a4f3a95c1ee11704">PAIMON_UNIQUE_PTR</a></div><div class="ttdeci">#define PAIMON_UNIQUE_PTR</div><div class="ttdef"><b>Definition</b> memory_pool.h:219</div></div> |
| <div class="ttc" id="anamespacepaimon_html"><div class="ttname"><a href="namespacepaimon.html">paimon</a></div><div class="ttdoc">Top-level namespace for Paimon C++ API.</div><div class="ttdef"><b>Definition</b> api.h:42</div></div> |
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