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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.schema</a></div> |
| <h2 title="Interface ExtensibleTable" class="title">Interface ExtensibleTable</h2> |
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| <pre>public interface <span class="typeNameLabel">ExtensibleTable</span> |
| extends <a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></pre> |
| <div class="block">Table whose row type can be extended to include extra fields. |
| |
| <p>In some storage systems, especially those with "late schema", there may |
| exist columns that have values in the table but which are not declared in |
| the table schema. However, a particular query may wish to reference these |
| columns as if they were defined in the schema. Calling the <a href="#extend(java.util.List)"><code>extend(java.util.List<org.apache.calcite.rel.type.RelDataTypeField>)</code></a> |
| method creates a temporarily extended table schema. |
| |
| <p>If the table implements extended interfaces such as |
| <a href="ScannableTable.html" title="interface in org.apache.calcite.schema"><code>ScannableTable</code></a>, |
| <a href="FilterableTable.html" title="interface in org.apache.calcite.schema"><code>FilterableTable</code></a> or |
| <a href="ProjectableFilterableTable.html" title="interface in org.apache.calcite.schema"><code>ProjectableFilterableTable</code></a>, you may wish |
| to make the table returned from <a href="#extend(java.util.List)"><code>extend(java.util.List<org.apache.calcite.rel.type.RelDataTypeField>)</code></a> implement these interfaces |
| as well.</div> |
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| <td class="colFirst"><code><a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#extend(java.util.List)">extend</a></span>​(java.util.List<<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> fields)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns a table that has the row type of this table plus the given |
| fields.</div> |
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| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>int</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getExtendedColumnOffset()">getExtendedColumnOffset</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Returns the starting offset of the first extended column, which may differ |
| from the field count when the table stores metadata columns that are not |
| counted in the row-type field count.</div> |
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| <h3>Methods inherited from interface org.apache.calcite.schema.<a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></h3> |
| <code><a href="Table.html#getJdbcTableType()">getJdbcTableType</a>, <a href="Table.html#getRowType(org.apache.calcite.rel.type.RelDataTypeFactory)">getRowType</a>, <a href="Table.html#getStatistic()">getStatistic</a>, <a href="Table.html#isRolledUp(java.lang.String)">isRolledUp</a>, <a href="Table.html#rolledUpColumnValidInsideAgg(java.lang.String,org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.SqlNode,org.apache.calcite.config.CalciteConnectionConfig)">rolledUpColumnValidInsideAgg</a></code></li> |
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| <h4>extend</h4> |
| <pre class="methodSignature"><a href="Table.html" title="interface in org.apache.calcite.schema">Table</a> extend​(java.util.List<<a href="../rel/type/RelDataTypeField.html" title="interface in org.apache.calcite.rel.type">RelDataTypeField</a>> fields)</pre> |
| <div class="block">Returns a table that has the row type of this table plus the given |
| fields.</div> |
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| <h4>getExtendedColumnOffset</h4> |
| <pre class="methodSignature">int getExtendedColumnOffset()</pre> |
| <div class="block">Returns the starting offset of the first extended column, which may differ |
| from the field count when the table stores metadata columns that are not |
| counted in the row-type field count.</div> |
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