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<div class="subTitle">org.apache.calcite.schema</div>
<h2 title="接口 TableFactory" class="title">接口 TableFactory&lt;T extends <a href="../../../../org/apache/calcite/schema/Table.html" title="org.apache.calcite.schema中的接口">Table</a>&gt;</h2>
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<dt><span class="paramLabel">类型参数:</span></dt>
<dd><code>T</code> - Sub-type of table created by this factory</dd>
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<dt>所有已知实现类:</dt>
<dd><a href="../../../../org/apache/calcite/adapter/csv/CsvStreamTableFactory.html" title="org.apache.calcite.adapter.csv中的类">CsvStreamTableFactory</a>, <a href="../../../../org/apache/calcite/adapter/csv/CsvTableFactory.html" title="org.apache.calcite.adapter.csv中的类">CsvTableFactory</a>, <a href="../../../../org/apache/calcite/adapter/druid/DruidTableFactory.html" title="org.apache.calcite.adapter.druid中的类">DruidTableFactory</a>, <a href="../../../../org/apache/calcite/adapter/kafka/KafkaTableFactory.html" title="org.apache.calcite.adapter.kafka中的类">KafkaTableFactory</a>, <a href="../../../../org/apache/calcite/adapter/pig/PigTableFactory.html" title="org.apache.calcite.adapter.pig中的类">PigTableFactory</a>, <a href="../../../../org/apache/calcite/chinook/PreferredAlbumsTableFactory.html" title="org.apache.calcite.chinook中的类">PreferredAlbumsTableFactory</a>, <a href="../../../../org/apache/calcite/chinook/PreferredGenresTableFactory.html" title="org.apache.calcite.chinook中的类">PreferredGenresTableFactory</a>, <a href="../../../../org/apache/calcite/adapter/redis/RedisTableFactory.html" title="org.apache.calcite.adapter.redis中的类">RedisTableFactory</a></dd>
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<pre>public interface <span class="typeNameLabel">TableFactory&lt;T extends <a href="../../../../org/apache/calcite/schema/Table.html" title="org.apache.calcite.schema中的接口">Table</a>&gt;</span></pre>
<div class="block">Factory for <a href="../../../../org/apache/calcite/schema/Table.html" title="org.apache.calcite.schema中的接口"><code>Table</code></a> objects.
<p>A table factory allows you to include custom tables in a model file.
For example, here is a model that contains a custom table that generates
a range of integers.</p>
<blockquote><pre>{
version: '1.0',
defaultSchema: 'MATH',
schemas: [
{
name: 'MATH',
tables: [
{
name: 'INTEGERS',
type: 'custom',
factory: 'com.acme.IntegerTable',
operand: {
start: 3,
end: 7,
column: 'N'
}
}
]
}
]
}</pre></blockquote>
<p>Given that schema, the query</p>
<blockquote><pre>SELECT * FROM math.integers</pre></blockquote>
<p>returns</p>
<blockquote><pre>
+---+
| N |
+---+
| 3 |
| 4 |
| 5 |
| 6 |
+---+
</pre></blockquote>
<p>A class that implements TableFactory specified in a schema must have a
public default constructor.</p></div>
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<caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd">&nbsp;</span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd">&nbsp;</span></span><span id="t3" class="tableTab"><span><a href="javascript:show(4);">抽象方法</a></span><span class="tabEnd">&nbsp;</span></span></caption>
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<td class="colFirst"><code><a href="../../../../org/apache/calcite/schema/TableFactory.html" title="TableFactory中的类型参数">T</a></code></td>
<td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/schema/TableFactory.html#create-org.apache.calcite.schema.SchemaPlus-java.lang.String-java.util.Map-org.apache.calcite.rel.type.RelDataType-">create</a></span>(<a href="../../../../org/apache/calcite/schema/SchemaPlus.html" title="org.apache.calcite.schema中的接口">SchemaPlus</a>&nbsp;schema,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;name,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="java.util中的类或接口">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>&gt;&nbsp;operand,
<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rowType)</code>
<div class="block">Creates a Table.</div>
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<h3>方法详细资料</h3>
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<h4>create</h4>
<pre><a href="../../../../org/apache/calcite/schema/TableFactory.html" title="TableFactory中的类型参数">T</a>&nbsp;create(<a href="../../../../org/apache/calcite/schema/SchemaPlus.html" title="org.apache.calcite.schema中的接口">SchemaPlus</a>&nbsp;schema,
<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>&nbsp;name,
<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Map.html?is-external=true" title="java.util中的类或接口">Map</a>&lt;<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="java.lang中的类或接口">String</a>,<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="java.lang中的类或接口">Object</a>&gt;&nbsp;operand,
<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a>&nbsp;rowType)</pre>
<div class="block">Creates a Table.</div>
<dl>
<dt><span class="paramLabel">参数:</span></dt>
<dd><code>schema</code> - Schema this table belongs to</dd>
<dd><code>name</code> - Name of this table</dd>
<dd><code>operand</code> - The "operand" JSON property</dd>
<dd><code>rowType</code> - Row type. Specified if the "columns" JSON property.</dd>
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