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| <h1 class="title">INSERT OVERWRITE DIRECTORY</h1> |
| |
| |
| <h3 id="description">Description</h3> |
| |
| <p>The <code class="language-plaintext highlighter-rouge">INSERT OVERWRITE DIRECTORY</code> statement overwrites the existing data in the directory with the new values using either spark file format or Hive Serde. |
| Hive support must be enabled to use Hive Serde. The inserted rows can be specified by value expressions or result from a query.</p> |
| |
| <h3 id="syntax">Syntax</h3> |
| |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="p">[</span> <span class="k">LOCAL</span> <span class="p">]</span> <span class="n">DIRECTORY</span> <span class="p">[</span> <span class="n">directory_path</span> <span class="p">]</span> |
| <span class="err">{</span> <span class="n">spark_format</span> <span class="o">|</span> <span class="n">hive_format</span> <span class="err">}</span> |
| <span class="err">{</span> <span class="k">VALUES</span> <span class="p">(</span> <span class="err">{</span> <span class="n">value</span> <span class="o">|</span> <span class="k">NULL</span> <span class="err">}</span> <span class="p">[</span> <span class="p">,</span> <span class="p">...</span> <span class="p">]</span> <span class="p">)</span> <span class="p">[</span> <span class="p">,</span> <span class="p">(</span> <span class="p">...</span> <span class="p">)</span> <span class="p">]</span> <span class="o">|</span> <span class="n">query</span> <span class="err">}</span> |
| </code></pre></div></div> |
| |
| <p>While <code class="language-plaintext highlighter-rouge">spark_format</code> is defined as</p> |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">USING</span> <span class="n">file_format</span> <span class="p">[</span> <span class="k">OPTIONS</span> <span class="p">(</span> <span class="k">key</span> <span class="o">=</span> <span class="n">val</span> <span class="p">[</span> <span class="p">,</span> <span class="p">...</span> <span class="p">]</span> <span class="p">)</span> <span class="p">]</span> |
| </code></pre></div></div> |
| |
| <p><code class="language-plaintext highlighter-rouge">hive_format</code> is defined as</p> |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="p">[</span> <span class="k">ROW</span> <span class="n">FORMAT</span> <span class="n">row_format</span> <span class="p">]</span> <span class="p">[</span> <span class="n">STORED</span> <span class="k">AS</span> <span class="n">hive_serde</span> <span class="p">]</span> |
| </code></pre></div></div> |
| |
| <h3 id="parameters">Parameters</h3> |
| |
| <ul> |
| <li> |
| <p><strong>directory_path</strong></p> |
| |
| <p>Specifies the destination directory. The <code class="language-plaintext highlighter-rouge">LOCAL</code> keyword is used to specify that the directory is on the local file system. |
| In spark file format, it can also be specified in <code class="language-plaintext highlighter-rouge">OPTIONS</code> using <code class="language-plaintext highlighter-rouge">path</code>, but <code class="language-plaintext highlighter-rouge">directory_path</code> and <code class="language-plaintext highlighter-rouge">path</code> option can not be both specified.</p> |
| </li> |
| <li> |
| <p><strong>file_format</strong></p> |
| |
| <p>Specifies the file format to use for the insert. Valid options are <code class="language-plaintext highlighter-rouge">TEXT</code>, <code class="language-plaintext highlighter-rouge">CSV</code>, <code class="language-plaintext highlighter-rouge">JSON</code>, <code class="language-plaintext highlighter-rouge">JDBC</code>, <code class="language-plaintext highlighter-rouge">PARQUET</code>, <code class="language-plaintext highlighter-rouge">ORC</code>, <code class="language-plaintext highlighter-rouge">HIVE</code>, <code class="language-plaintext highlighter-rouge">LIBSVM</code>, or a fully qualified class name of a custom implementation of <code class="language-plaintext highlighter-rouge">org.apache.spark.sql.execution.datasources.FileFormat</code>.</p> |
| </li> |
| <li> |
| <p><strong>OPTIONS ( key = val [ , … ] )</strong></p> |
| |
| <p>Specifies one or more options for the writing of the file format.</p> |
| </li> |
| <li> |
| <p><strong>hive_format</strong></p> |
| |
| <p>Specifies the file format to use for the insert. Both <code class="language-plaintext highlighter-rouge">row_format</code> and <code class="language-plaintext highlighter-rouge">hive_serde</code> are optional. <code class="language-plaintext highlighter-rouge">ROW FORMAT SERDE</code> can only be used with <code class="language-plaintext highlighter-rouge">TEXTFILE</code>, <code class="language-plaintext highlighter-rouge">SEQUENCEFILE</code>, or <code class="language-plaintext highlighter-rouge">RCFILE</code>, while <code class="language-plaintext highlighter-rouge">ROW FORMAT DELIMITED</code> can only be used with <code class="language-plaintext highlighter-rouge">TEXTFILE</code>. If both are not defined, spark uses <code class="language-plaintext highlighter-rouge">TEXTFILE</code>.</p> |
| </li> |
| <li> |
| <p><strong>row_format</strong></p> |
| |
| <p>Specifies the row format for this insert. Valid options are <code class="language-plaintext highlighter-rouge">SERDE</code> clause and <code class="language-plaintext highlighter-rouge">DELIMITED</code> clause. <code class="language-plaintext highlighter-rouge">SERDE</code> clause can be used to specify a custom <code class="language-plaintext highlighter-rouge">SerDe</code> for this insert. Alternatively, <code class="language-plaintext highlighter-rouge">DELIMITED</code> clause can be used to specify the native <code class="language-plaintext highlighter-rouge">SerDe</code> and state the delimiter, escape character, null character, and so on.</p> |
| </li> |
| <li> |
| <p><strong>hive_serde</strong></p> |
| |
| <p>Specifies the file format for this insert. Valid options are <code class="language-plaintext highlighter-rouge">TEXTFILE</code>, <code class="language-plaintext highlighter-rouge">SEQUENCEFILE</code>, <code class="language-plaintext highlighter-rouge">RCFILE</code>, <code class="language-plaintext highlighter-rouge">ORC</code>, <code class="language-plaintext highlighter-rouge">PARQUET</code>, and <code class="language-plaintext highlighter-rouge">AVRO</code>. You can also specify your own input and output format using <code class="language-plaintext highlighter-rouge">INPUTFORMAT</code> and <code class="language-plaintext highlighter-rouge">OUTPUTFORMAT</code>.</p> |
| </li> |
| <li> |
| <p><strong>VALUES ( { value <code class="language-plaintext highlighter-rouge">|</code> NULL } [ , … ] ) [ , ( … ) ]</strong></p> |
| |
| <p>Specifies the values to be inserted. Either an explicitly specified value or a NULL can be inserted. |
| A comma must be used to separate each value in the clause. More than one set of values can be specified to insert multiple rows.</p> |
| </li> |
| <li> |
| <p><strong>query</strong></p> |
| |
| <p>A query that produces the rows to be inserted. It can be in one of following formats:</p> |
| <ul> |
| <li>a <a href="sql-ref-syntax-qry-select.html">SELECT</a> statement</li> |
| <li>a <a href="sql-ref-syntax-qry-select-inline-table.html">Inline Table</a> statement</li> |
| <li>a <code class="language-plaintext highlighter-rouge">FROM</code> statement</li> |
| </ul> |
| </li> |
| </ul> |
| |
| <h3 id="examples">Examples</h3> |
| |
| <h4 id="spark-format">Spark format</h4> |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="n">DIRECTORY</span> <span class="s1">'/tmp/destination'</span> |
| <span class="k">USING</span> <span class="n">parquet</span> |
| <span class="k">OPTIONS</span> <span class="p">(</span><span class="n">col1</span> <span class="mi">1</span><span class="p">,</span> <span class="n">col2</span> <span class="mi">2</span><span class="p">,</span> <span class="n">col3</span> <span class="s1">'test'</span><span class="p">)</span> |
| <span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">test_table</span><span class="p">;</span> |
| |
| <span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="n">DIRECTORY</span> |
| <span class="k">USING</span> <span class="n">parquet</span> |
| <span class="k">OPTIONS</span> <span class="p">(</span><span class="s1">'path'</span> <span class="s1">'/tmp/destination'</span><span class="p">,</span> <span class="n">col1</span> <span class="mi">1</span><span class="p">,</span> <span class="n">col2</span> <span class="mi">2</span><span class="p">,</span> <span class="n">col3</span> <span class="s1">'test'</span><span class="p">)</span> |
| <span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">test_table</span><span class="p">;</span> |
| </code></pre></div></div> |
| |
| <h4 id="hive-format">Hive format</h4> |
| |
| <div class="language-sql highlighter-rouge"><div class="highlight"><pre class="highlight"><code><span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">LOCAL</span> <span class="n">DIRECTORY</span> <span class="s1">'/tmp/destination'</span> |
| <span class="n">STORED</span> <span class="k">AS</span> <span class="n">orc</span> |
| <span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">test_table</span><span class="p">;</span> |
| |
| <span class="k">INSERT</span> <span class="n">OVERWRITE</span> <span class="k">LOCAL</span> <span class="n">DIRECTORY</span> <span class="s1">'/tmp/destination'</span> |
| <span class="k">ROW</span> <span class="n">FORMAT</span> <span class="n">DELIMITED</span> <span class="n">FIELDS</span> <span class="n">TERMINATED</span> <span class="k">BY</span> <span class="s1">','</span> |
| <span class="k">SELECT</span> <span class="o">*</span> <span class="k">FROM</span> <span class="n">test_table</span><span class="p">;</span> |
| </code></pre></div></div> |
| |
| <h3 id="related-statements">Related Statements</h3> |
| |
| <ul> |
| <li><a href="sql-ref-syntax-dml-insert-table.html">INSERT TABLE statement</a></li> |
| </ul> |
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| // 2. a JavaScript snippet to be inserted in your website that will bind this Algolia index |
| // to your search input and display its results in a dropdown UI. If you want to find more |
| // details on how works DocSearch, check the docs of DocSearch. |
| docsearch({ |
| apiKey: 'd62f962a82bc9abb53471cb7b89da35e', |
| appId: 'RAI69RXRSK', |
| indexName: 'apache_spark', |
| inputSelector: '#docsearch-input', |
| enhancedSearchInput: true, |
| algoliaOptions: { |
| 'facetFilters': ["version:3.3.4"] |
| }, |
| debug: false // Set debug to true if you want to inspect the dropdown |
| }); |
| |
| </script> |
| |
| <!-- MathJax Section --> |
| <script type="text/x-mathjax-config"> |
| MathJax.Hub.Config({ |
| TeX: { equationNumbers: { autoNumber: "AMS" } } |
| }); |
| </script> |
| <script> |
| // Note that we load MathJax this way to work with local file (file://), HTTP and HTTPS. |
| // We could use "//cdn.mathjax...", but that won't support "file://". |
| (function(d, script) { |
| script = d.createElement('script'); |
| script.type = 'text/javascript'; |
| script.async = true; |
| script.onload = function(){ |
| MathJax.Hub.Config({ |
| tex2jax: { |
| inlineMath: [ ["$", "$"], ["\\\\(","\\\\)"] ], |
| displayMath: [ ["$$","$$"], ["\\[", "\\]"] ], |
| processEscapes: true, |
| skipTags: ['script', 'noscript', 'style', 'textarea', 'pre'] |
| } |
| }); |
| }; |
| script.src = ('https:' == document.location.protocol ? 'https://' : 'http://') + |
| 'cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.1/MathJax.js' + |
| '?config=TeX-AMS-MML_HTMLorMML'; |
| d.getElementsByTagName('head')[0].appendChild(script); |
| }(document)); |
| </script> |
| </body> |
| </html> |
