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           <h1>C++ Tools</h1>
           <h2 id="orc-contents">orc-contents</h2>

 <p>Displays the contents of the ORC file as a JSON document. With the
 <code class="highlighter-rouge">columns</code> argument only the selected columns are printed.</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-contents <span class="o">[</span>options] &lt;filename&gt;
 Options:
 	<span class="nt">-h</span> <span class="nt">--help</span>
 	<span class="nt">-c</span> <span class="nt">--columns</span>		Comma separated list of top-level column fields
 	<span class="nt">-t</span> <span class="nt">--columnTypeIds</span>	Comma separated list of column <span class="nb">type </span>ids
 	<span class="nt">-n</span> <span class="nt">--columnNames</span>	Comma separated list of column names
 	<span class="nt">-b</span> <span class="nt">--batch</span>		Batch size <span class="k">for </span>reading
 </code></pre></div></div>

 <p>If you run it on the example file TestOrcFile.test1.orc, you’ll see (without
 the line breaks within each record):</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-contents examples/TestOrcFile.test1.orc
 <span class="o">{</span><span class="s2">"boolean1"</span>: <span class="nb">false</span>, <span class="s2">"byte1"</span>: 1, <span class="s2">"short1"</span>: 1024, <span class="s2">"int1"</span>: 65536, <span class="se">\\</span>
  <span class="s2">"long1"</span>: 9223372036854775807, <span class="s2">"float1"</span>: 1, <span class="s2">"double1"</span>: <span class="nt">-15</span>, <span class="se">\\</span>
  <span class="s2">"bytes1"</span>: <span class="o">[</span>0, 1, 2, 3, 4], <span class="s2">"string1"</span>: <span class="s2">"hi"</span>, <span class="s2">"middle"</span>: <span class="se">\\</span>
     <span class="o">{</span><span class="s2">"list"</span>: <span class="o">[{</span><span class="s2">"int1"</span>: 1, <span class="s2">"string1"</span>: <span class="s2">"bye"</span><span class="o">}</span>, <span class="se">\\</span>
               <span class="o">{</span><span class="s2">"int1"</span>: 2, <span class="s2">"string1"</span>: <span class="s2">"sigh"</span><span class="o">}]}</span>, <span class="se">\\</span>
  <span class="s2">"list"</span>: <span class="o">[{</span><span class="s2">"int1"</span>: 3, <span class="s2">"string1"</span>: <span class="s2">"good"</span><span class="o">}</span>, <span class="se">\\</span>
           <span class="o">{</span><span class="s2">"int1"</span>: 4, <span class="s2">"string1"</span>: <span class="s2">"bad"</span><span class="o">}]</span>, <span class="se">\\</span>
  <span class="s2">"map"</span>: <span class="o">[]}</span>
 <span class="o">{</span><span class="s2">"boolean1"</span>: <span class="nb">true</span>, <span class="s2">"byte1"</span>: 100, <span class="s2">"short1"</span>: 2048, <span class="s2">"int1"</span>: 65536,
  <span class="s2">"long1"</span>: 9223372036854775807, <span class="s2">"float1"</span>: 2, <span class="s2">"double1"</span>: <span class="nt">-5</span>, <span class="se">\\</span>
  <span class="s2">"bytes1"</span>: <span class="o">[]</span>, <span class="s2">"string1"</span>: <span class="s2">"bye"</span>, <span class="se">\\</span>
  <span class="s2">"middle"</span>: <span class="o">{</span><span class="s2">"list"</span>: <span class="o">[{</span><span class="s2">"int1"</span>: 1, <span class="s2">"string1"</span>: <span class="s2">"bye"</span><span class="o">}</span>, <span class="se">\\</span>
                      <span class="o">{</span><span class="s2">"int1"</span>: 2, <span class="s2">"string1"</span>: <span class="s2">"sigh"</span><span class="o">}]}</span>, <span class="se">\\</span>
  <span class="s2">"list"</span>: <span class="o">[{</span><span class="s2">"int1"</span>: 100000000, <span class="s2">"string1"</span>: <span class="s2">"cat"</span><span class="o">}</span>, <span class="se">\\</span>
           <span class="o">{</span><span class="s2">"int1"</span>: <span class="nt">-100000</span>, <span class="s2">"string1"</span>: <span class="s2">"in"</span><span class="o">}</span>, <span class="se">\\</span>
           <span class="o">{</span><span class="s2">"int1"</span>: 1234, <span class="s2">"string1"</span>: <span class="s2">"hat"</span><span class="o">}]</span>, <span class="se">\\</span>
  <span class="s2">"map"</span>: <span class="o">[{</span><span class="s2">"key"</span>: <span class="s2">"chani"</span>, <span class="s2">"value"</span>: <span class="o">{</span><span class="s2">"int1"</span>: 5, <span class="s2">"string1"</span>: <span class="s2">"chani"</span><span class="o">}}</span>, <span class="se">\\</span>
          <span class="o">{</span><span class="s2">"key"</span>: <span class="s2">"mauddib"</span>, <span class="se">\\</span>
           <span class="s2">"value"</span>: <span class="o">{</span><span class="s2">"int1"</span>: 1, <span class="s2">"string1"</span>: <span class="s2">"mauddib"</span><span class="o">}}]}</span>
 </code></pre></div></div>

 <h2 id="orc-metadata">orc-metadata</h2>

 <p>Displays the metadata of the ORC file as a JSON document. With the
 <code class="highlighter-rouge">verbose</code> option additional information about the layout of the file
 is also printed.</p>

 <p>For diagnosing problems, it is useful to use the ‘–raw’ option that
 prints the protocol buffers from the ORC file directly rather than
 interpreting them.</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-metadata <span class="o">[</span><span class="nt">-v</span><span class="o">]</span> <span class="o">[</span><span class="nt">--raw</span><span class="o">]</span> &lt;filename&gt;
 </code></pre></div></div>

 <p>If you run it on the example file TestOrcFile.test1.orc, you’ll see:</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-metadata examples/TestOrcFile.test1.orc
 <span class="o">{</span> <span class="s2">"name"</span>: <span class="s2">"../examples/TestOrcFile.test1.orc"</span>,
   <span class="s2">"type"</span>: <span class="s2">"struct&lt;boolean1:boolean,byte1:tinyint,short1:smallint,
 int1:int,long1:bigint,float1:float,double1:double,bytes1:binary,
 string1:string,middle:struct&lt;list:array&lt;struct&lt;int1:int,string1:
 string&gt;&gt;&gt;,list:array&lt;struct&lt;int1:int,string1:string&gt;&gt;,map:map&lt;
 string,struct&lt;int1:int,string1:string&gt;&gt;&gt;"</span>,
   <span class="s2">"rows"</span>: 2,
   <span class="s2">"stripe count"</span>: 1,
   <span class="s2">"format"</span>: <span class="s2">"0.12"</span>, <span class="s2">"writer version"</span>: <span class="s2">"HIVE-8732"</span>,
   <span class="s2">"compression"</span>: <span class="s2">"zlib"</span>, <span class="s2">"compression block"</span>: 10000,
   <span class="s2">"file length"</span>: 1711,
   <span class="s2">"content"</span>: 1015, <span class="s2">"stripe stats"</span>: 250, <span class="s2">"footer"</span>: 421, <span class="s2">"postscript"</span>: 24,
   <span class="s2">"row index stride"</span>: 10000,
   <span class="s2">"user metadata"</span>: <span class="o">{</span>
   <span class="o">}</span>,
   <span class="s2">"stripes"</span>: <span class="o">[</span>
     <span class="o">{</span> <span class="s2">"stripe"</span>: 0, <span class="s2">"rows"</span>: 2,
       <span class="s2">"offset"</span>: 3, <span class="s2">"length"</span>: 1012,
       <span class="s2">"index"</span>: 570, <span class="s2">"data"</span>: 243, <span class="s2">"footer"</span>: 199
     <span class="o">}</span>
   <span class="o">]</span>
 <span class="o">}</span>
 </code></pre></div></div>

 <h2 id="csv-import">csv-import</h2>

 <p>Imports CSV file into an Orc file using the specified schema.
 Compound types are not yet supported. <code class="highlighter-rouge">delimiter</code> option indicates
 the delimiter in the input CSV file and by default is <code class="highlighter-rouge">,</code>. <code class="highlighter-rouge">stripe</code>
 option means the stripe size and set to 128MB by default. <code class="highlighter-rouge">block</code>
 option is compression block size which is 64KB by default. <code class="highlighter-rouge">batch</code>
 option is by default 1024 rows for one batch.</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% csv-import <span class="o">[</span><span class="nt">--delimiter</span><span class="o">=</span>&lt;character&gt;] <span class="o">[</span><span class="nt">--stripe</span><span class="o">=</span>&lt;size&gt;]
              <span class="o">[</span><span class="nt">--block</span><span class="o">=</span>&lt;size&gt;] <span class="o">[</span><span class="nt">--batch</span><span class="o">=</span>&lt;size&gt;]
              &lt;schema&gt; &lt;inputCSVFile&gt; &lt;outputORCFile&gt;
 </code></pre></div></div>

 <p>If you run it on the example file TestCSVFileImport.test10rows.csv,
 you’ll see:</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% csv-import <span class="s2">"struct&lt;a:bigint,b:string,c:double&gt;"</span>
              examples/TestCSVFileImport.test10rows.csv /tmp/test.orc
 <span class="o">[</span>2018-04-11 11:12:16] Start importing Orc file...
 <span class="o">[</span>2018-04-11 11:12:16] Finish importing Orc file.
 <span class="o">[</span>2018-04-11 11:12:16] Total writer elasped <span class="nb">time</span>: 0.001352s.
 <span class="o">[</span>2018-04-11 11:12:16] Total writer CPU <span class="nb">time</span>: 0.001339s.
 </code></pre></div></div>

 <h2 id="orc-scan">orc-scan</h2>

 <p>Scans and displays the row count of the ORC file. With the <code class="highlighter-rouge">batch</code> option
 to set the batch size which is 1024 rows by default. It is useful to check
 if the ORC file is damaged.</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-scan <span class="o">[</span>options] &lt;filename&gt;...
 Options:
 	<span class="nt">-h</span> <span class="nt">--help</span>
 	<span class="nt">-c</span> <span class="nt">--columns</span>		Comma separated list of top-level column fields
 	<span class="nt">-t</span> <span class="nt">--columnTypeIds</span>	Comma separated list of column <span class="nb">type </span>ids
 	<span class="nt">-n</span> <span class="nt">--columnNames</span>	Comma separated list of column names
 	<span class="nt">-b</span> <span class="nt">--batch</span>		Batch size <span class="k">for </span>reading
 </code></pre></div></div>

 <p>If you run it on the example file TestOrcFile.test1.orc, you’ll see:</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-scan examples/TestOrcFile.test1.orc
 Rows: 2
 Batches: 1
 </code></pre></div></div>

 <h2 id="orc-statistics">orc-statistics</h2>

 <p>Displays the file-level and stripe-level column statistics of the ORC file.
 With the <code class="highlighter-rouge">withIndex</code> option to include column statistics in each row group.</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-statistics <span class="o">[</span><span class="nt">--withIndex</span><span class="o">]</span> &lt;filename&gt;
 </code></pre></div></div>

 <p>If you run it on the example file TestOrcFile.columnProjection.orc
 you’ll see:</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-statistics examples/TestOrcFile.columnProjection.orc
 File examples/TestOrcFile.columnProjection.orc has 3 columns
 <span class="k">***</span> Column 0 <span class="k">***</span>
 Column has 21000 values and has null value: no

 <span class="k">***</span> Column 1 <span class="k">***</span>
 Data <span class="nb">type</span>: Integer
 Values: 21000
 Has null: no
 Minimum: <span class="nt">-2147439072</span>
 Maximum: 2147257982
 Sum: 268482658568

 <span class="k">***</span> Column 2 <span class="k">***</span>
 Data <span class="nb">type</span>: String
 Values: 21000
 Has null: no
 Minimum: 100119c272d7db89
 Maximum: fffe9f6f23b287f3
 Total length: 334559

 File examples/TestOrcFile.columnProjection.orc has 5 stripes
 <span class="k">***</span> Stripe 0 <span class="k">***</span>

 <span class="nt">---</span> Column 0 <span class="nt">---</span>
 Column has 5000 values and has null value: no

 <span class="nt">---</span> Column 1 <span class="nt">---</span>
 Data <span class="nb">type</span>: Integer
 Values: 5000
 Has null: no
 Minimum: <span class="nt">-2145365268</span>
 Maximum: 2147025027
 Sum: <span class="nt">-29841423854</span>

 <span class="nt">---</span> Column 2 <span class="nt">---</span>
 Data <span class="nb">type</span>: String
 Values: 5000
 Has null: no
 Minimum: 1005350489418be2
 Maximum: fffbb8718c92b09f
 Total length: 79644

 <span class="k">***</span> Stripe 1 <span class="k">***</span>

 <span class="nt">---</span> Column 0 <span class="nt">---</span>
 Column has 5000 values and has null value: no

 <span class="nt">---</span> Column 1 <span class="nt">---</span>
 Data <span class="nb">type</span>: Integer
 Values: 5000
 Has null: no
 Minimum: <span class="nt">-2147115959</span>
 Maximum: 2147257982
 Sum: 108604887785

 <span class="nt">---</span> Column 2 <span class="nt">---</span>
 Data <span class="nb">type</span>: String
 Values: 5000
 Has null: no
 Minimum: 100119c272d7db89
 Maximum: fff0ae41d41e6afc
 Total length: 79640

 <span class="k">***</span> Stripe 2 <span class="k">***</span>

 <span class="nt">---</span> Column 0 <span class="nt">---</span>
 Column has 5000 values and has null value: no

 <span class="nt">---</span> Column 1 <span class="nt">---</span>
 Data <span class="nb">type</span>: Integer
 Values: 5000
 Has null: no
 Minimum: <span class="nt">-2145932387</span>
 Maximum: 2145877119
 Sum: 70064190848

 <span class="nt">---</span> Column 2 <span class="nt">---</span>
 Data <span class="nb">type</span>: String
 Values: 5000
 Has null: no
 Minimum: 10130af874ae036c
 Maximum: fffe9f6f23b287f3
 Total length: 79645

 <span class="k">***</span> Stripe 3 <span class="k">***</span>

 <span class="nt">---</span> Column 0 <span class="nt">---</span>
 Column has 5000 values and has null value: no

 <span class="nt">---</span> Column 1 <span class="nt">---</span>
 Data <span class="nb">type</span>: Integer
 Values: 5000
 Has null: no
 Minimum: <span class="nt">-2147439072</span>
 Maximum: 2147074354
 Sum: 104681356482

 <span class="nt">---</span> Column 2 <span class="nt">---</span>
 Data <span class="nb">type</span>: String
 Values: 5000
 Has null: no
 Minimum: 102547d48ed06518
 Maximum: fffa47c57dc7b69a
 Total length: 79689

 <span class="k">***</span> Stripe 4 <span class="k">***</span>

 <span class="nt">---</span> Column 0 <span class="nt">---</span>
 Column has 1000 values and has null value: no

 <span class="nt">---</span> Column 1 <span class="nt">---</span>
 Data <span class="nb">type</span>: Integer
 Values: 1000
 Has null: no
 Minimum: <span class="nt">-2141222223</span>
 Maximum: 2145816096
 Sum: 14973647307

 <span class="nt">---</span> Column 2 <span class="nt">---</span>
 Data <span class="nb">type</span>: String
 Values: 1000
 Has null: no
 Minimum: 1059d81c9025a217
 Maximum: ffc17f0e35e1a6c0
 Total length: 15941
 </code></pre></div></div>

 <h2 id="orc-memory">orc-memory</h2>

 <p>Estimate the memory footprint for reading the ORC file.</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-memory <span class="o">[</span>options] &lt;filename&gt;
 Options:
 	<span class="nt">-h</span> <span class="nt">--help</span>
 	<span class="nt">-c</span> <span class="nt">--columns</span>		Comma separated list of top-level column fields
 	<span class="nt">-t</span> <span class="nt">--columnTypeIds</span>	Comma separated list of column <span class="nb">type </span>ids
 	<span class="nt">-n</span> <span class="nt">--columnNames</span>	Comma separated list of column names
 	<span class="nt">-b</span> <span class="nt">--batch</span>		Batch size <span class="k">for </span>reading
 </code></pre></div></div>

 <p>If you run it on the example file TestOrcFile.columnProjection.orc
 you’ll see:</p>

 <div class="language-shell highlighter-rouge"><div class="highlight"><pre class="highlight"><code>% orc-memory examples/TestOrcFile.columnProjection.orc,
 Reader memory estimate: 202972
 Batch memory estimate:  27000
 Total memory estimate:  229972
 Actual max memory used: 160381
 </code></pre></div></div>


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