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| <section id="arrow-jdbc-adapter"> |
| <h1>Arrow JDBC Adapter<a class="headerlink" href="#arrow-jdbc-adapter" title="Link to this heading">¶</a></h1> |
| <p>The Arrow JDBC Adapter assists with working with JDBC and Arrow |
| data. Currently, it supports reading JDBC ResultSets into Arrow |
| VectorSchemaRoots.</p> |
| <section id="resultset-to-vectorschemaroot-conversion"> |
| <h2>ResultSet to VectorSchemaRoot Conversion<a class="headerlink" href="#resultset-to-vectorschemaroot-conversion" title="Link to this heading">¶</a></h2> |
| <p>This can be accessed via the JdbcToArrow class. The resulting |
| ArrowVectorIterator will convert a ResultSet to Arrow data in batches |
| of rows.</p> |
| <div class="highlight-java notranslate"><div class="highlight"><pre><span></span><span class="k">try</span><span class="w"> </span><span class="p">(</span><span class="n">ArrowVectorIterator</span><span class="w"> </span><span class="n">it</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">JdbcToArrow</span><span class="p">.</span><span class="na">sqlToArrowVectorIterator</span><span class="p">(</span><span class="n">resultSet</span><span class="p">,</span><span class="w"> </span><span class="n">allocator</span><span class="p">))</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">it</span><span class="p">.</span><span class="na">hasNext</span><span class="p">())</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="n">VectorSchemaRoot</span><span class="w"> </span><span class="n">root</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">it</span><span class="p">.</span><span class="na">next</span><span class="p">();</span> |
| <span class="w"> </span><span class="c1">// Consume the root…</span> |
| <span class="w"> </span><span class="p">}</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| <p>The batch size and type mapping can both be customized:</p> |
| <div class="highlight-java notranslate"><div class="highlight"><pre><span></span><span class="n">JdbcToArrowConfig</span><span class="w"> </span><span class="n">config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">JdbcToArrowConfigBuilder</span><span class="p">(</span><span class="n">allocator</span><span class="p">,</span><span class="w"> </span><span class="cm">/*calendar=*/</span><span class="kc">null</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">setReuseVectorSchemaRoot</span><span class="p">(</span><span class="n">reuseVectorSchemaRoot</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">setJdbcToArrowTypeConverter</span><span class="p">((</span><span class="n">jdbcFieldInfo</span><span class="w"> </span><span class="o">-></span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">switch</span><span class="w"> </span><span class="p">(</span><span class="n">jdbcFieldInfo</span><span class="p">.</span><span class="na">getJdbcType</span><span class="p">())</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">case</span><span class="w"> </span><span class="n">Types</span><span class="p">.</span><span class="na">BIGINT</span><span class="p">:</span> |
| <span class="w"> </span><span class="c1">// Assume actual value range is SMALLINT</span> |
| <span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">ArrowType</span><span class="p">.</span><span class="na">Int</span><span class="p">(</span><span class="mi">16</span><span class="p">,</span><span class="w"> </span><span class="kc">true</span><span class="p">);</span> |
| <span class="w"> </span><span class="k">default</span><span class="p">:</span> |
| <span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="kc">null</span><span class="p">;</span> |
| <span class="w"> </span><span class="p">}</span> |
| <span class="w"> </span><span class="p">}))</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">build</span><span class="p">();</span> |
| <span class="k">try</span><span class="w"> </span><span class="p">(</span><span class="n">ArrowVectorIterator</span><span class="w"> </span><span class="n">iter</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">JdbcToArrow</span><span class="p">.</span><span class="na">sqlToArrowVectorIterator</span><span class="p">(</span><span class="n">rs</span><span class="p">,</span><span class="w"> </span><span class="n">config</span><span class="p">))</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">iter</span><span class="p">.</span><span class="na">hasNext</span><span class="p">())</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="n">VectorSchemaRoot</span><span class="w"> </span><span class="n">root</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">iter</span><span class="p">.</span><span class="na">next</span><span class="p">();</span> |
| <span class="w"> </span><span class="c1">// Consume the root…</span> |
| <span class="w"> </span><span class="p">}</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| <p>The JDBC type can be explicitly specified, which is useful since JDBC |
| drivers can give spurious type information. For example, the Postgres |
| driver has been observed to use Decimal types with scale and precision |
| 0; these cases can be handled by specifying the type explicitly before |
| reading. Also, some JDBC drivers may return BigDecimal values with |
| inconsistent scale. A RoundingMode can be set to handle these cases:</p> |
| <div class="highlight-java notranslate"><div class="highlight"><pre><span></span><span class="n">Map</span><span class="o"><</span><span class="n">Integer</span><span class="p">,</span><span class="w"> </span><span class="n">JdbcFieldInfo</span><span class="o">></span><span class="w"> </span><span class="n">mapping</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">HashMap</span><span class="o"><></span><span class="p">();</span> |
| <span class="n">mapping</span><span class="p">.</span><span class="na">put</span><span class="p">(</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">JdbcFieldInfo</span><span class="p">(</span><span class="n">Types</span><span class="p">.</span><span class="na">DECIMAL</span><span class="p">,</span><span class="w"> </span><span class="mi">20</span><span class="p">,</span><span class="w"> </span><span class="mi">7</span><span class="p">));</span> |
| <span class="n">JdbcToArrowConfig</span><span class="w"> </span><span class="n">config</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="k">new</span><span class="w"> </span><span class="n">JdbcToArrowConfigBuilder</span><span class="p">(</span><span class="n">allocator</span><span class="p">,</span><span class="w"> </span><span class="cm">/*calendar=*/</span><span class="kc">null</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">setBigDecimalRoundingMode</span><span class="p">(</span><span class="n">RoundingMode</span><span class="p">.</span><span class="na">UNNECESSARY</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">setExplicitTypesByColumnIndex</span><span class="p">(</span><span class="n">mapping</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">build</span><span class="p">();</span> |
| <span class="k">try</span><span class="w"> </span><span class="p">(</span><span class="n">ArrowVectorIterator</span><span class="w"> </span><span class="n">iter</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">JdbcToArrow</span><span class="p">.</span><span class="na">sqlToArrowVectorIterator</span><span class="p">(</span><span class="n">rs</span><span class="p">,</span><span class="w"> </span><span class="n">config</span><span class="p">))</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">iter</span><span class="p">.</span><span class="na">hasNext</span><span class="p">())</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="n">VectorSchemaRoot</span><span class="w"> </span><span class="n">root</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">iter</span><span class="p">.</span><span class="na">next</span><span class="p">();</span> |
| <span class="w"> </span><span class="c1">// Consume the root…</span> |
| <span class="w"> </span><span class="p">}</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| <p>The mapping from JDBC type to Arrow type can be overridden via the |
| <code class="docutils literal notranslate"><span class="pre">JdbcToArrowConfig</span></code>, but it is not possible to customize the |
| conversion from JDBC value to Arrow value itself, nor is it possible |
| to define a conversion for an unsupported type.</p> |
| <section id="type-mapping"> |
| <h3>Type Mapping<a class="headerlink" href="#type-mapping" title="Link to this heading">¶</a></h3> |
| <p>The JDBC to Arrow type mapping can be obtained at runtime from |
| <a class="reference external" href="https://arrow.apache.org/docs/java/reference/org/apache/arrow/adapter/jdbc/JdbcToArrowUtils.html#getArrowTypeFromJdbcType-org.apache.arrow.adapter.jdbc.JdbcFieldInfo-java.util.Calendar-">JdbcToArrowUtils.getArrowTypeFromJdbcType</a>.</p> |
| <div class="table-wrapper docutils container"> |
| <table class="docutils align-default"> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>JDBC Type</p></th> |
| <th class="head"><p>Arrow Type</p></th> |
| <th class="head"><p>Notes</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>ARRAY</p></td> |
| <td><p>List</p></td> |
| <td><p>(1)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>BIGINT</p></td> |
| <td><p>Int64</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>BINARY</p></td> |
| <td><p>Binary</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>BIT</p></td> |
| <td><p>Bool</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>BLOB</p></td> |
| <td><p>Binary</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>BOOLEAN</p></td> |
| <td><p>Bool</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>CHAR</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>CLOB</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>DATE</p></td> |
| <td><p>Date32</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>DECIMAL</p></td> |
| <td><p>Decimal128</p></td> |
| <td><p>(2)</p></td> |
| </tr> |
| <tr class="row-even"><td><p>DOUBLE</p></td> |
| <td><p>Double</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>FLOAT</p></td> |
| <td><p>Float32</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>INTEGER</p></td> |
| <td><p>Int32</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>LONGVARBINARY</p></td> |
| <td><p>Binary</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>LONGNVARCHAR</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>LONGVARCHAR</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>NCHAR</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>NULL</p></td> |
| <td><p>Null</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>NUMERIC</p></td> |
| <td><p>Decimal128</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>NVARCHAR</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>REAL</p></td> |
| <td><p>Float32</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>SMALLINT</p></td> |
| <td><p>Int16</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>STRUCT</p></td> |
| <td><p>Struct</p></td> |
| <td><p>(3)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>TIME</p></td> |
| <td><p>Time32[ms]</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>TIMESTAMP</p></td> |
| <td><p>Timestamp[ms]</p></td> |
| <td><p>(4)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>TINYINT</p></td> |
| <td><p>Int8</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>VARBINARY</p></td> |
| <td><p>Binary</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>VARCHAR</p></td> |
| <td><p>Utf8</p></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <ul class="simple"> |
| <li><p>(1) The list value type must be explicitly configured and cannot be |
| inferred. Use <a class="reference external" href="https://arrow.apache.org/docs/java/reference/org/apache/arrow/adapter/jdbc/JdbcToArrowConfigBuilder.html#setArraySubTypeByColumnIndexMap-java.util.Map-">setArraySubTypeByColumnIndexMap</a> or |
| <a class="reference external" href="https://arrow.apache.org/docs/java/reference/org/apache/arrow/adapter/jdbc/JdbcToArrowConfigBuilder.html#setArraySubTypeByColumnNameMap-java.util.Map-">setArraySubTypeByColumnNameMap</a>.</p></li> |
| <li><p>(2) By default, the scale of decimal values must match the scale in |
| the type exactly; precision is allowed to be any value greater or |
| equal to the type precision. If there is a mismatch, by default, an |
| exception will be thrown. This can be configured by setting a |
| different RoundingMode with setBigDecimalRoundingMode.</p></li> |
| <li><p>(3) Not fully supported: while the type conversion is defined, the |
| value conversion is not. See <a class="reference external" href="https://issues.apache.org/jira/browse/ARROW-17006">ARROW-17006</a>.</p></li> |
| <li><p>(4) If a Calendar is provided, then the timestamp will have the |
| timezone of the calendar, else it will be a timestamp without |
| timezone.</p></li> |
| </ul> |
| </section> |
| </section> |
| <section id="vectorschemaroot-to-preparedstatement-parameter-conversion"> |
| <h2>VectorSchemaRoot to PreparedStatement Parameter Conversion<a class="headerlink" href="#vectorschemaroot-to-preparedstatement-parameter-conversion" title="Link to this heading">¶</a></h2> |
| <p>The adapter can bind rows of Arrow data from a VectorSchemaRoot to |
| parameters of a JDBC PreparedStatement. This can be accessed via the |
| JdbcParameterBinder class. Each call to next() will bind parameters |
| from the next row of data, and then the application can execute the |
| statement, call addBatch(), etc. as desired. Null values will lead to |
| a setNull call with an appropriate JDBC type code (listed below).</p> |
| <div class="highlight-java notranslate"><div class="highlight"><pre><span></span><span class="kd">final</span><span class="w"> </span><span class="n">JdbcParameterBinder</span><span class="w"> </span><span class="n">binder</span><span class="w"> </span><span class="o">=</span> |
| <span class="w"> </span><span class="n">JdbcParameterBinder</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">statement</span><span class="p">,</span><span class="w"> </span><span class="n">root</span><span class="p">).</span><span class="na">bindAll</span><span class="p">().</span><span class="na">build</span><span class="p">();</span> |
| <span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">binder</span><span class="p">.</span><span class="na">next</span><span class="p">())</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="n">statement</span><span class="p">.</span><span class="na">executeUpdate</span><span class="p">();</span> |
| <span class="p">}</span> |
| <span class="c1">// Use a VectorLoader to update the root</span> |
| <span class="n">binder</span><span class="p">.</span><span class="na">reset</span><span class="p">();</span> |
| <span class="k">while</span><span class="w"> </span><span class="p">(</span><span class="n">binder</span><span class="p">.</span><span class="na">next</span><span class="p">())</span><span class="w"> </span><span class="p">{</span> |
| <span class="w"> </span><span class="n">statement</span><span class="p">.</span><span class="na">executeUpdate</span><span class="p">();</span> |
| <span class="p">}</span> |
| </pre></div> |
| </div> |
| <p>The mapping of vectors to parameters, the JDBC type code used by the |
| converters, and the type conversions themselves can all be customized:</p> |
| <div class="highlight-java notranslate"><div class="highlight"><pre><span></span><span class="kd">final</span><span class="w"> </span><span class="n">JdbcParameterBinder</span><span class="w"> </span><span class="n">binder</span><span class="w"> </span><span class="o">=</span> |
| <span class="w"> </span><span class="n">JdbcParameterBinder</span><span class="p">.</span><span class="na">builder</span><span class="p">(</span><span class="n">statement</span><span class="p">,</span><span class="w"> </span><span class="n">root</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">bind</span><span class="p">(</span><span class="cm">/*parameterIndex*/</span><span class="mi">2</span><span class="p">,</span><span class="w"> </span><span class="cm">/*columnIndex*/</span><span class="mi">0</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">bind</span><span class="p">(</span><span class="cm">/*parameterIndex*/</span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="n">customColumnBinderInstance</span><span class="p">)</span> |
| <span class="w"> </span><span class="p">.</span><span class="na">build</span><span class="p">();</span> |
| </pre></div> |
| </div> |
| <section id="id1"> |
| <h3>Type Mapping<a class="headerlink" href="#id1" title="Link to this heading">¶</a></h3> |
| <p>The Arrow to JDBC type mapping can be obtained at runtime via |
| a method on ColumnBinder.</p> |
| <div class="table-wrapper docutils container"> |
| <table class="docutils align-default"> |
| <thead> |
| <tr class="row-odd"><th class="head"><p>Arrow Type</p></th> |
| <th class="head"><p>JDBC Type</p></th> |
| <th class="head"><p>Notes</p></th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="row-even"><td><p>Binary</p></td> |
| <td><p>VARBINARY (setBytes)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Bool</p></td> |
| <td><p>BOOLEAN (setBoolean)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>Date32</p></td> |
| <td><p>DATE (setDate)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Date64</p></td> |
| <td><p>DATE (setDate)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>Decimal128</p></td> |
| <td><p>DECIMAL (setBigDecimal)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Decimal256</p></td> |
| <td><p>DECIMAL (setBigDecimal)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>FixedSizeBinary</p></td> |
| <td><p>BINARY (setBytes)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Float32</p></td> |
| <td><p>REAL (setFloat)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>Int8</p></td> |
| <td><p>TINYINT (setByte)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Int16</p></td> |
| <td><p>SMALLINT (setShort)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>Int32</p></td> |
| <td><p>INTEGER (setInt)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Int64</p></td> |
| <td><p>BIGINT (setLong)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>LargeBinary</p></td> |
| <td><p>LONGVARBINARY (setBytes)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>LargeUtf8</p></td> |
| <td><p>LONGVARCHAR (setString)</p></td> |
| <td><p>(1)</p></td> |
| </tr> |
| <tr class="row-even"><td><p>Time[s]</p></td> |
| <td><p>TIME (setTime)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Time[ms]</p></td> |
| <td><p>TIME (setTime)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>Time[us]</p></td> |
| <td><p>TIME (setTime)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-odd"><td><p>Time[ns]</p></td> |
| <td><p>TIME (setTime)</p></td> |
| <td></td> |
| </tr> |
| <tr class="row-even"><td><p>Timestamp[s]</p></td> |
| <td><p>TIMESTAMP (setTimestamp)</p></td> |
| <td><p>(2)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>Timestamp[ms]</p></td> |
| <td><p>TIMESTAMP (setTimestamp)</p></td> |
| <td><p>(2)</p></td> |
| </tr> |
| <tr class="row-even"><td><p>Timestamp[us]</p></td> |
| <td><p>TIMESTAMP (setTimestamp)</p></td> |
| <td><p>(2)</p></td> |
| </tr> |
| <tr class="row-odd"><td><p>Timestamp[ns]</p></td> |
| <td><p>TIMESTAMP (setTimestamp)</p></td> |
| <td><p>(2)</p></td> |
| </tr> |
| <tr class="row-even"><td><p>Utf8</p></td> |
| <td><p>VARCHAR (setString)</p></td> |
| <td></td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| <ul class="simple"> |
| <li><p>(1) Strings longer than Integer.MAX_VALUE bytes (the maximum length |
| of a Java <code class="docutils literal notranslate"><span class="pre">byte[]</span></code>) will cause a runtime exception.</p></li> |
| <li><p>(2) If the timestamp has a timezone, the JDBC type defaults to |
| TIMESTAMP_WITH_TIMEZONE. If the timestamp has no timezone, |
| technically there is not a correct conversion from Arrow value to |
| JDBC value, because a JDBC Timestamp is in UTC, and we have no |
| timezone information. In this case, the default binder will call |
| <a class="reference external" href="https://docs.oracle.com/en/java/javase/11/docs/api/java.sql/java/sql/PreparedStatement.html#setTimestamp(int,java.sql.Timestamp)">setTimestamp(int, Timestamp)</a>, |
| which will lead to the driver using the “default timezone” (that of |
| the Java VM).</p></li> |
| </ul> |
| </section> |
| </section> |
| </section> |
| |
| </article> |
| </div> |
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| <li><a class="reference internal" href="#">Arrow JDBC Adapter</a><ul> |
| <li><a class="reference internal" href="#resultset-to-vectorschemaroot-conversion">ResultSet to VectorSchemaRoot Conversion</a><ul> |
| <li><a class="reference internal" href="#type-mapping">Type Mapping</a></li> |
| </ul> |
| </li> |
| <li><a class="reference internal" href="#vectorschemaroot-to-preparedstatement-parameter-conversion">VectorSchemaRoot to PreparedStatement Parameter Conversion</a><ul> |
| <li><a class="reference internal" href="#id1">Type Mapping</a></li> |
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