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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.schema</a></div> |
| <h1 title="Interface ProjectableFilterableTable" class="title">Interface ProjectableFilterableTable</h1> |
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| <dd><code><a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></code></dd> |
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| <pre>public interface <span class="typeNameLabel">ProjectableFilterableTable</span> |
| extends <a href="Table.html" title="interface in org.apache.calcite.schema">Table</a></pre> |
| <div class="block">Table that can be scanned, optionally applying supplied filter expressions, |
| and projecting a given list of columns, |
| without creating an intermediate relational expression. |
| |
| <p>If you wish to write a table that can apply projects but not filters, |
| simply decline all filters.</p></div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><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></dd> |
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| <td class="colFirst"><code><a href="../linq4j/Enumerable.html" title="interface in org.apache.calcite.linq4j">Enumerable</a><@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang" class="externalLink">Object</a>[]></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#scan(org.apache.calcite.DataContext,java.util.List,int%5B%5D)">scan</a></span>​(<a href="../DataContext.html" title="interface in org.apache.calcite">DataContext</a> root, |
| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> filters, |
| int @Nullable [] projects)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns an enumerable over the rows in this Table.</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> |
| <a id="methods.inherited.from.class.org.apache.calcite.schema.Table"> |
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| </a><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></div> |
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| <a href="https://docs.oracle.com/javase/9/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util" class="externalLink">List</a><<a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a>> filters, |
| int @Nullable [] projects)</span></div> |
| <div class="block">Returns an enumerable over the rows in this Table. |
| |
| <p>Each row is represented as an array of its column values. |
| |
| <p>The list of filters is mutable. |
| If the table can implement a particular filter, it should remove that |
| filter from the list. |
| If it cannot implement a filter, it should leave it in the list. |
| Any filters remaining will be implemented by the consuming Calcite |
| operator. |
| |
| <p>The projects are zero-based.</p></div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>root</code> - Execution context</dd> |
| <dd><code>filters</code> - Mutable list of filters. The method should keep in the |
| list any filters that it cannot apply.</dd> |
| <dd><code>projects</code> - List of projects. Each is the 0-based ordinal of the column |
| to project. Null means "project all columns".</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>Enumerable over all rows that match the accepted filters, returning |
| for each row an array of column values, one value for each ordinal in |
| <code>projects</code>.</dd> |
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