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<h1>Flink DDL</h1>
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<h2 id="ddl-commands">DDL commands<a class="headerlink" href="#ddl-commands" title="Permanent link">🔗</a></h2>
<h3 id="create-catalog"><code>CREATE Catalog</code><a class="headerlink" href="#create-catalog" title="Permanent link">🔗</a></h3>
<h4 id="hive-catalog">Hive catalog<a class="headerlink" href="#hive-catalog" title="Permanent link">🔗</a></h4>
<p>This creates an Iceberg catalog named <code>hive_catalog</code> that can be configured using <code>'catalog-type'='hive'</code>, which loads tables from Hive metastore:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-0-1" name="__codelineno-0-1" href="#__codelineno-0-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">CATALOG</span><span class="w"> </span><span class="n">hive_catalog</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-0-2" name="__codelineno-0-2" href="#__codelineno-0-2"></a><span class="w"> </span><span class="s1">&#39;type&#39;</span><span class="o">=</span><span class="s1">&#39;iceberg&#39;</span><span class="p">,</span>
<a id="__codelineno-0-3" name="__codelineno-0-3" href="#__codelineno-0-3"></a><span class="w"> </span><span class="s1">&#39;catalog-type&#39;</span><span class="o">=</span><span class="s1">&#39;hive&#39;</span><span class="p">,</span>
<a id="__codelineno-0-4" name="__codelineno-0-4" href="#__codelineno-0-4"></a><span class="w"> </span><span class="s1">&#39;uri&#39;</span><span class="o">=</span><span class="s1">&#39;thrift://localhost:9083&#39;</span><span class="p">,</span>
<a id="__codelineno-0-5" name="__codelineno-0-5" href="#__codelineno-0-5"></a><span class="w"> </span><span class="s1">&#39;clients&#39;</span><span class="o">=</span><span class="s1">&#39;5&#39;</span><span class="p">,</span>
<a id="__codelineno-0-6" name="__codelineno-0-6" href="#__codelineno-0-6"></a><span class="w"> </span><span class="s1">&#39;property-version&#39;</span><span class="o">=</span><span class="s1">&#39;1&#39;</span><span class="p">,</span>
<a id="__codelineno-0-7" name="__codelineno-0-7" href="#__codelineno-0-7"></a><span class="w"> </span><span class="s1">&#39;warehouse&#39;</span><span class="o">=</span><span class="s1">&#39;hdfs://nn:8020/warehouse/path&#39;</span>
<a id="__codelineno-0-8" name="__codelineno-0-8" href="#__codelineno-0-8"></a><span class="p">);</span>
</code></pre></div>
<p>The following properties can be set if using the Hive catalog:</p>
<ul>
<li><code>uri</code>: The Hive metastore's thrift URI. (Required)</li>
<li><code>clients</code>: The Hive metastore client pool size, default value is 2. (Optional)</li>
<li><code>warehouse</code>: The Hive warehouse location, users should specify this path if neither set the <code>hive-conf-dir</code> to specify a location containing a <code>hive-site.xml</code> configuration file nor add a correct <code>hive-site.xml</code> to classpath.</li>
<li><code>hive-conf-dir</code>: Path to a directory containing a <code>hive-site.xml</code> configuration file which will be used to provide custom Hive configuration values. The value of <code>hive.metastore.warehouse.dir</code> from <code>&lt;hive-conf-dir&gt;/hive-site.xml</code> (or hive configure file from classpath) will be overwritten with the <code>warehouse</code> value if setting both <code>hive-conf-dir</code> and <code>warehouse</code> when creating iceberg catalog.</li>
<li><code>hadoop-conf-dir</code>: Path to a directory containing <code>core-site.xml</code> and <code>hdfs-site.xml</code> configuration files which will be used to provide custom Hadoop configuration values.</li>
</ul>
<h4 id="hadoop-catalog">Hadoop catalog<a class="headerlink" href="#hadoop-catalog" title="Permanent link">🔗</a></h4>
<p>Iceberg also supports a directory-based catalog in HDFS that can be configured using <code>'catalog-type'='hadoop'</code>:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">CATALOG</span><span class="w"> </span><span class="n">hadoop_catalog</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="w"> </span><span class="s1">&#39;type&#39;</span><span class="o">=</span><span class="s1">&#39;iceberg&#39;</span><span class="p">,</span>
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="w"> </span><span class="s1">&#39;catalog-type&#39;</span><span class="o">=</span><span class="s1">&#39;hadoop&#39;</span><span class="p">,</span>
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="w"> </span><span class="s1">&#39;warehouse&#39;</span><span class="o">=</span><span class="s1">&#39;hdfs://nn:8020/warehouse/path&#39;</span><span class="p">,</span>
<a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a><span class="w"> </span><span class="s1">&#39;property-version&#39;</span><span class="o">=</span><span class="s1">&#39;1&#39;</span>
<a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="p">);</span>
</code></pre></div>
<p>The following properties can be set if using the Hadoop catalog:</p>
<ul>
<li><code>warehouse</code>: The HDFS directory to store metadata files and data files. (Required)</li>
</ul>
<p>Execute the sql command <code>USE CATALOG hadoop_catalog</code> to set the current catalog.</p>
<h4 id="rest-catalog">REST catalog<a class="headerlink" href="#rest-catalog" title="Permanent link">🔗</a></h4>
<p>This creates an iceberg catalog named <code>rest_catalog</code> that can be configured using <code>'catalog-type'='rest'</code>, which loads tables from a REST catalog:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-2-1" name="__codelineno-2-1" href="#__codelineno-2-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">CATALOG</span><span class="w"> </span><span class="n">rest_catalog</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-2-2" name="__codelineno-2-2" href="#__codelineno-2-2"></a><span class="w"> </span><span class="s1">&#39;type&#39;</span><span class="o">=</span><span class="s1">&#39;iceberg&#39;</span><span class="p">,</span>
<a id="__codelineno-2-3" name="__codelineno-2-3" href="#__codelineno-2-3"></a><span class="w"> </span><span class="s1">&#39;catalog-type&#39;</span><span class="o">=</span><span class="s1">&#39;rest&#39;</span><span class="p">,</span>
<a id="__codelineno-2-4" name="__codelineno-2-4" href="#__codelineno-2-4"></a><span class="w"> </span><span class="s1">&#39;uri&#39;</span><span class="o">=</span><span class="s1">&#39;https://localhost/&#39;</span>
<a id="__codelineno-2-5" name="__codelineno-2-5" href="#__codelineno-2-5"></a><span class="p">);</span>
</code></pre></div>
<p>The following properties can be set if using the REST catalog:</p>
<ul>
<li><code>uri</code>: The URL to the REST Catalog (Required)</li>
<li><code>credential</code>: A credential to exchange for a token in the OAuth2 client credentials flow (Optional)</li>
<li><code>token</code>: A token which will be used to interact with the server (Optional)</li>
</ul>
<h4 id="custom-catalog">Custom catalog<a class="headerlink" href="#custom-catalog" title="Permanent link">🔗</a></h4>
<p>Flink also supports loading a custom Iceberg <code>Catalog</code> implementation by specifying the <code>catalog-impl</code> property:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-3-1" name="__codelineno-3-1" href="#__codelineno-3-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">CATALOG</span><span class="w"> </span><span class="n">my_catalog</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-3-2" name="__codelineno-3-2" href="#__codelineno-3-2"></a><span class="w"> </span><span class="s1">&#39;type&#39;</span><span class="o">=</span><span class="s1">&#39;iceberg&#39;</span><span class="p">,</span>
<a id="__codelineno-3-3" name="__codelineno-3-3" href="#__codelineno-3-3"></a><span class="w"> </span><span class="s1">&#39;catalog-impl&#39;</span><span class="o">=</span><span class="s1">&#39;com.my.custom.CatalogImpl&#39;</span><span class="p">,</span>
<a id="__codelineno-3-4" name="__codelineno-3-4" href="#__codelineno-3-4"></a><span class="w"> </span><span class="s1">&#39;my-additional-catalog-config&#39;</span><span class="o">=</span><span class="s1">&#39;my-value&#39;</span>
<a id="__codelineno-3-5" name="__codelineno-3-5" href="#__codelineno-3-5"></a><span class="p">);</span>
</code></pre></div>
<h4 id="create-through-yaml-config">Create through YAML config<a class="headerlink" href="#create-through-yaml-config" title="Permanent link">🔗</a></h4>
<p>Catalogs can be registered in <code>sql-client-defaults.yaml</code> before starting the SQL client.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-4-1" name="__codelineno-4-1" href="#__codelineno-4-1"></a><span class="nt">catalogs</span><span class="p">:</span><span class="w"> </span>
<a id="__codelineno-4-2" name="__codelineno-4-2" href="#__codelineno-4-2"></a><span class="w"> </span><span class="p p-Indicator">-</span><span class="w"> </span><span class="nt">name</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">my_catalog</span>
<a id="__codelineno-4-3" name="__codelineno-4-3" href="#__codelineno-4-3"></a><span class="w"> </span><span class="nt">type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">iceberg</span>
<a id="__codelineno-4-4" name="__codelineno-4-4" href="#__codelineno-4-4"></a><span class="w"> </span><span class="nt">catalog-type</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">hadoop</span>
<a id="__codelineno-4-5" name="__codelineno-4-5" href="#__codelineno-4-5"></a><span class="w"> </span><span class="nt">warehouse</span><span class="p">:</span><span class="w"> </span><span class="l l-Scalar l-Scalar-Plain">hdfs://nn:8020/warehouse/path</span>
</code></pre></div>
<h4 id="create-through-sql-files">Create through SQL Files<a class="headerlink" href="#create-through-sql-files" title="Permanent link">🔗</a></h4>
<p>The Flink SQL Client supports the <code>-i</code> startup option to execute an initialization SQL file to set up environment when starting up the SQL Client.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-5-1" name="__codelineno-5-1" href="#__codelineno-5-1"></a><span class="c1">-- define available catalogs</span>
<a id="__codelineno-5-2" name="__codelineno-5-2" href="#__codelineno-5-2"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">CATALOG</span><span class="w"> </span><span class="n">hive_catalog</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-5-3" name="__codelineno-5-3" href="#__codelineno-5-3"></a><span class="w"> </span><span class="s1">&#39;type&#39;</span><span class="o">=</span><span class="s1">&#39;iceberg&#39;</span><span class="p">,</span>
<a id="__codelineno-5-4" name="__codelineno-5-4" href="#__codelineno-5-4"></a><span class="w"> </span><span class="s1">&#39;catalog-type&#39;</span><span class="o">=</span><span class="s1">&#39;hive&#39;</span><span class="p">,</span>
<a id="__codelineno-5-5" name="__codelineno-5-5" href="#__codelineno-5-5"></a><span class="w"> </span><span class="s1">&#39;uri&#39;</span><span class="o">=</span><span class="s1">&#39;thrift://localhost:9083&#39;</span><span class="p">,</span>
<a id="__codelineno-5-6" name="__codelineno-5-6" href="#__codelineno-5-6"></a><span class="w"> </span><span class="s1">&#39;warehouse&#39;</span><span class="o">=</span><span class="s1">&#39;hdfs://nn:8020/warehouse/path&#39;</span>
<a id="__codelineno-5-7" name="__codelineno-5-7" href="#__codelineno-5-7"></a><span class="p">);</span>
<a id="__codelineno-5-8" name="__codelineno-5-8" href="#__codelineno-5-8"></a>
<a id="__codelineno-5-9" name="__codelineno-5-9" href="#__codelineno-5-9"></a><span class="n">USE</span><span class="w"> </span><span class="k">CATALOG</span><span class="w"> </span><span class="n">hive_catalog</span><span class="p">;</span>
</code></pre></div>
<p>Using <code>-i &lt;init.sql&gt;</code> option to initialize SQL Client session:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-6-1" name="__codelineno-6-1" href="#__codelineno-6-1"></a>/path/to/bin/sql-client.sh<span class="w"> </span>-i<span class="w"> </span>/path/to/init.sql
</code></pre></div>
<h3 id="create-database"><code>CREATE DATABASE</code><a class="headerlink" href="#create-database" title="Permanent link">🔗</a></h3>
<p>By default, Iceberg will use the <code>default</code> database in Flink. Using the following example to create a separate database in order to avoid creating tables under the <code>default</code> database:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-7-1" name="__codelineno-7-1" href="#__codelineno-7-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">DATABASE</span><span class="w"> </span><span class="n">iceberg_db</span><span class="p">;</span>
<a id="__codelineno-7-2" name="__codelineno-7-2" href="#__codelineno-7-2"></a><span class="n">USE</span><span class="w"> </span><span class="n">iceberg_db</span><span class="p">;</span>
</code></pre></div>
<h3 id="create-table"><code>CREATE TABLE</code><a class="headerlink" href="#create-table" title="Permanent link">🔗</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-8-1" name="__codelineno-8-1" href="#__codelineno-8-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-8-2" name="__codelineno-8-2" href="#__codelineno-8-2"></a><span class="w"> </span><span class="n">id</span><span class="w"> </span><span class="nb">BIGINT</span><span class="w"> </span><span class="k">COMMENT</span><span class="w"> </span><span class="s1">&#39;unique id&#39;</span><span class="p">,</span>
<a id="__codelineno-8-3" name="__codelineno-8-3" href="#__codelineno-8-3"></a><span class="w"> </span><span class="k">data</span><span class="w"> </span><span class="n">STRING</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span>
<a id="__codelineno-8-4" name="__codelineno-8-4" href="#__codelineno-8-4"></a><span class="p">)</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span><span class="s1">&#39;format-version&#39;</span><span class="o">=</span><span class="s1">&#39;2&#39;</span><span class="p">);</span>
</code></pre></div>
<p>Table create commands support the commonly used <a href="https://nightlies.apache.org/flink/flink-docs-master/docs/dev/table/sql/create/">Flink create clauses</a> including:</p>
<ul>
<li><code>PARTITION BY (column1, column2, ...)</code> to configure partitioning, Flink does not yet support hidden partitioning.</li>
<li><code>COMMENT 'table document'</code> to set a table description.</li>
<li><code>WITH ('key'='value', ...)</code> to set <a href="../configuration/">table configuration</a> which will be stored in Iceberg table properties.</li>
</ul>
<p>Currently, it does not support computed column and watermark definition etc.</p>
<h4 id="primary-key"><code>PRIMARY KEY</code><a class="headerlink" href="#primary-key" title="Permanent link">🔗</a></h4>
<p>Primary key constraint can be declared for a column or a set of columns, which must be unique and do not contain null.
It's required for <a href="../flink-writes/#upsert"><code>UPSERT</code> mode</a>.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-9-1" name="__codelineno-9-1" href="#__codelineno-9-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-9-2" name="__codelineno-9-2" href="#__codelineno-9-2"></a><span class="w"> </span><span class="n">id</span><span class="w"> </span><span class="nb">BIGINT</span><span class="w"> </span><span class="k">COMMENT</span><span class="w"> </span><span class="s1">&#39;unique id&#39;</span><span class="p">,</span>
<a id="__codelineno-9-3" name="__codelineno-9-3" href="#__codelineno-9-3"></a><span class="w"> </span><span class="k">data</span><span class="w"> </span><span class="n">STRING</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span><span class="p">,</span>
<a id="__codelineno-9-4" name="__codelineno-9-4" href="#__codelineno-9-4"></a><span class="w"> </span><span class="k">PRIMARY</span><span class="w"> </span><span class="k">KEY</span><span class="p">(</span><span class="o">`</span><span class="n">id</span><span class="o">`</span><span class="p">)</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="n">ENFORCED</span>
<a id="__codelineno-9-5" name="__codelineno-9-5" href="#__codelineno-9-5"></a><span class="p">)</span><span class="w"> </span><span class="k">WITH</span><span class="w"> </span><span class="p">(</span><span class="s1">&#39;format-version&#39;</span><span class="o">=</span><span class="s1">&#39;2&#39;</span><span class="p">);</span>
</code></pre></div>
<h4 id="partitioned-by"><code>PARTITIONED BY</code><a class="headerlink" href="#partitioned-by" title="Permanent link">🔗</a></h4>
<p>To create a partition table, use <code>PARTITIONED BY</code>:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-10-1" name="__codelineno-10-1" href="#__codelineno-10-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-10-2" name="__codelineno-10-2" href="#__codelineno-10-2"></a><span class="w"> </span><span class="n">id</span><span class="w"> </span><span class="nb">BIGINT</span><span class="w"> </span><span class="k">COMMENT</span><span class="w"> </span><span class="s1">&#39;unique id&#39;</span><span class="p">,</span>
<a id="__codelineno-10-3" name="__codelineno-10-3" href="#__codelineno-10-3"></a><span class="w"> </span><span class="k">data</span><span class="w"> </span><span class="n">STRING</span><span class="w"> </span><span class="k">NOT</span><span class="w"> </span><span class="k">NULL</span>
<a id="__codelineno-10-4" name="__codelineno-10-4" href="#__codelineno-10-4"></a><span class="p">)</span><span class="w"> </span>
<a id="__codelineno-10-5" name="__codelineno-10-5" href="#__codelineno-10-5"></a><span class="n">PARTITIONED</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="p">(</span><span class="k">data</span><span class="p">)</span><span class="w"> </span>
<a id="__codelineno-10-6" name="__codelineno-10-6" href="#__codelineno-10-6"></a><span class="k">WITH</span><span class="w"> </span><span class="p">(</span><span class="s1">&#39;format-version&#39;</span><span class="o">=</span><span class="s1">&#39;2&#39;</span><span class="p">);</span>
</code></pre></div>
<p>Iceberg supports hidden partitioning but Flink doesn't support partitioning by a function on columns. There is no way to support hidden partitions in the Flink DDL.</p>
<h3 id="create-table-like"><code>CREATE TABLE LIKE</code><a class="headerlink" href="#create-table-like" title="Permanent link">🔗</a></h3>
<p>To create a table with the same schema, partitioning, and table properties as another table, use <code>CREATE TABLE LIKE</code>.</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-11-1" name="__codelineno-11-1" href="#__codelineno-11-1"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="w"> </span><span class="p">(</span>
<a id="__codelineno-11-2" name="__codelineno-11-2" href="#__codelineno-11-2"></a><span class="w"> </span><span class="n">id</span><span class="w"> </span><span class="nb">BIGINT</span><span class="w"> </span><span class="k">COMMENT</span><span class="w"> </span><span class="s1">&#39;unique id&#39;</span><span class="p">,</span>
<a id="__codelineno-11-3" name="__codelineno-11-3" href="#__codelineno-11-3"></a><span class="w"> </span><span class="k">data</span><span class="w"> </span><span class="n">STRING</span>
<a id="__codelineno-11-4" name="__codelineno-11-4" href="#__codelineno-11-4"></a><span class="p">);</span>
<a id="__codelineno-11-5" name="__codelineno-11-5" href="#__codelineno-11-5"></a>
<a id="__codelineno-11-6" name="__codelineno-11-6" href="#__codelineno-11-6"></a><span class="k">CREATE</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample_like</span><span class="o">`</span><span class="w"> </span><span class="k">LIKE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="p">;</span>
</code></pre></div>
<p>For more details, refer to the <a href="https://nightlies.apache.org/flink/flink-docs-release-1.16/docs/dev/table/sql/create/">Flink <code>CREATE TABLE</code> documentation</a>.</p>
<h3 id="alter-table"><code>ALTER TABLE</code><a class="headerlink" href="#alter-table" title="Permanent link">🔗</a></h3>
<p>Iceberg only support altering table properties:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-12-1" name="__codelineno-12-1" href="#__codelineno-12-1"></a><span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="w"> </span><span class="k">SET</span><span class="w"> </span><span class="p">(</span><span class="s1">&#39;write.format.default&#39;</span><span class="o">=</span><span class="s1">&#39;avro&#39;</span><span class="p">);</span>
</code></pre></div>
<h3 id="alter-table-rename-to"><code>ALTER TABLE .. RENAME TO</code><a class="headerlink" href="#alter-table-rename-to" title="Permanent link">🔗</a></h3>
<div class="highlight"><pre><span></span><code><a id="__codelineno-13-1" name="__codelineno-13-1" href="#__codelineno-13-1"></a><span class="k">ALTER</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="w"> </span><span class="k">RENAME</span><span class="w"> </span><span class="k">TO</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">new_sample</span><span class="o">`</span><span class="p">;</span>
</code></pre></div>
<h3 id="drop-table"><code>DROP TABLE</code><a class="headerlink" href="#drop-table" title="Permanent link">🔗</a></h3>
<p>To delete a table, run:</p>
<div class="highlight"><pre><span></span><code><a id="__codelineno-14-1" name="__codelineno-14-1" href="#__codelineno-14-1"></a><span class="k">DROP</span><span class="w"> </span><span class="k">TABLE</span><span class="w"> </span><span class="o">`</span><span class="n">hive_catalog</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="k">default</span><span class="o">`</span><span class="p">.</span><span class="o">`</span><span class="n">sample</span><span class="o">`</span><span class="p">;</span>
</code></pre></div>
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