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| <div class="subTitle">org.apache.calcite.sql2rel</div> |
| <h2 title="类 NullInitializerExpressionFactory" class="title">类 NullInitializerExpressionFactory</h2> |
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| <ul class="inheritance"> |
| <li><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">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.sql2rel.NullInitializerExpressionFactory</li> |
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| <dl> |
| <dt>所有已实现的接口:</dt> |
| <dd><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></dd> |
| </dl> |
| <hr> |
| <br> |
| <pre>public class <span class="typeNameLabel">NullInitializerExpressionFactory</span> |
| extends <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> |
| implements <a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></pre> |
| <div class="block">An implementation of <a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口"><code>InitializerExpressionFactory</code></a> that always supplies NULL.</div> |
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| <h3>字段概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="字段概要表, 列表字段和解释"> |
| <caption><span>字段</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">字段和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#INSTANCE">INSTANCE</a></span></code> </td> |
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| </li> |
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| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
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| <h3>构造器概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="构造器概要表, 列表构造器和解释"> |
| <caption><span>构造器</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">构造器和说明</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#NullInitializerExpressionFactory--">NullInitializerExpressionFactory</a></span>()</code> </td> |
| </tr> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>方法概要</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="方法概要表, 列表方法和解释"> |
| <caption><span id="t0" class="activeTableTab"><span>所有方法</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">实例方法</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">具体方法</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">限定符和类型</th> |
| <th class="colLast" scope="col">方法和说明</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/schema/ColumnStrategy.html" title="org.apache.calcite.schema中的枚举">ColumnStrategy</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#generationStrategy-org.apache.calcite.plan.RelOptTable-int-">generationStrategy</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> table, |
| int iColumn)</code> |
| <div class="block">Returns how a column is populated.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#isGeneratedAlways-org.apache.calcite.plan.RelOptTable-int-">isGeneratedAlways</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> table, |
| int iColumn)</code> |
| <div class="block">Whether a column is always generated.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#newAttributeInitializer-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.SqlFunction-int-java.util.List-org.apache.calcite.sql2rel.InitializerContext-">newAttributeInitializer</a></span>(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> type, |
| <a href="../../../../org/apache/calcite/sql/SqlFunction.html" title="org.apache.calcite.sql中的类">SqlFunction</a> constructor, |
| int iAttribute, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> constructorArgs, |
| <a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html" title="org.apache.calcite.sql2rel中的接口">InitializerContext</a> context)</code> |
| <div class="block">Creates an expression which evaluates to the initializer expression for a |
| particular attribute of a structured type.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#newColumnDefaultValue-org.apache.calcite.plan.RelOptTable-int-org.apache.calcite.sql2rel.InitializerContext-">newColumnDefaultValue</a></span>(<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> table, |
| int iColumn, |
| <a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html" title="org.apache.calcite.sql2rel中的接口">InitializerContext</a> context)</code> |
| <div class="block">Creates an expression which evaluates to the default value for a |
| particular column.</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code><a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiFunction.html?is-external=true" title="java.util.function中的类或接口">BiFunction</a><<a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html" title="org.apache.calcite.sql2rel中的接口">InitializerContext</a>,<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>,<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../org/apache/calcite/sql2rel/NullInitializerExpressionFactory.html#postExpressionConversionHook--">postExpressionConversionHook</a></span>()</code> |
| <div class="block">Creates a hook function to customize the relational expression right after the column |
| expressions are converted.</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>从类继承的方法 java.lang.<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></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="java.lang中的类或接口">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="java.lang中的类或接口">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="java.lang中的类或接口">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="java.lang中的类或接口">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="java.lang中的类或接口">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="java.lang中的类或接口">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="java.lang中的类或接口">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="java.lang中的类或接口">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="java.lang中的类或接口">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="java.lang中的类或接口">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="field.detail"> |
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| </a> |
| <h3>字段详细资料</h3> |
| <a name="INSTANCE"> |
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| </a> |
| <ul class="blockListLast"> |
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| <h4>INSTANCE</h4> |
| <pre>public static final <a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a> INSTANCE</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
| <!-- --> |
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| <h3>构造器详细资料</h3> |
| <a name="NullInitializerExpressionFactory--"> |
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| <h4>NullInitializerExpressionFactory</h4> |
| <pre>public NullInitializerExpressionFactory()</pre> |
| </li> |
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| </ul> |
| <!-- ============ METHOD DETAIL ========== --> |
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| <h3>方法详细资料</h3> |
| <a name="isGeneratedAlways-org.apache.calcite.plan.RelOptTable-int-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>isGeneratedAlways</h4> |
| <pre>public boolean isGeneratedAlways(<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> table, |
| int iColumn)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#isGeneratedAlways-org.apache.calcite.plan.RelOptTable-int-">InitializerExpressionFactory</a></code></span></div> |
| <div class="block">Whether a column is always generated. If a column is always generated, |
| then non-generated values cannot be inserted into the column.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#isGeneratedAlways-org.apache.calcite.plan.RelOptTable-int-">isGeneratedAlways</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#generationStrategy-org.apache.calcite.plan.RelOptTable-int-"><code>InitializerExpressionFactory.generationStrategy(RelOptTable, int)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="generationStrategy-org.apache.calcite.plan.RelOptTable-int-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
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| <h4>generationStrategy</h4> |
| <pre>public <a href="../../../../org/apache/calcite/schema/ColumnStrategy.html" title="org.apache.calcite.schema中的枚举">ColumnStrategy</a> generationStrategy(<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> table, |
| int iColumn)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#generationStrategy-org.apache.calcite.plan.RelOptTable-int-">InitializerExpressionFactory</a></code></span></div> |
| <div class="block">Returns how a column is populated.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#generationStrategy-org.apache.calcite.plan.RelOptTable-int-">generationStrategy</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>table</code> - the table containing the column</dd> |
| <dd><code>iColumn</code> - the 0-based offset of the column in the table</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>generation strategy, never null</dd> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../org/apache/calcite/plan/RelOptTable.html#getColumnStrategies--"><code>RelOptTable.getColumnStrategies()</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="newColumnDefaultValue-org.apache.calcite.plan.RelOptTable-int-org.apache.calcite.sql2rel.InitializerContext-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>newColumnDefaultValue</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> newColumnDefaultValue(<a href="../../../../org/apache/calcite/plan/RelOptTable.html" title="org.apache.calcite.plan中的接口">RelOptTable</a> table, |
| int iColumn, |
| <a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html" title="org.apache.calcite.sql2rel中的接口">InitializerContext</a> context)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#newColumnDefaultValue-org.apache.calcite.plan.RelOptTable-int-org.apache.calcite.sql2rel.InitializerContext-">InitializerExpressionFactory</a></code></span></div> |
| <div class="block">Creates an expression which evaluates to the default value for a |
| particular column. |
| |
| <p>If the default value comes from a un-validated <a href="../../../../org/apache/calcite/sql/SqlNode.html" title="org.apache.calcite.sql中的类"><code>SqlNode</code></a>, |
| make sure to invoke <a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html#validateExpression-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.SqlNode-"><code>InitializerContext.validateExpression(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.sql.SqlNode)</code></a> first before you actually |
| do the conversion with method <a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html#convertExpression-org.apache.calcite.sql.SqlNode-"><code>InitializerContext.convertExpression(org.apache.calcite.sql.SqlNode)</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#newColumnDefaultValue-org.apache.calcite.plan.RelOptTable-int-org.apache.calcite.sql2rel.InitializerContext-">newColumnDefaultValue</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>table</code> - the table containing the column</dd> |
| <dd><code>iColumn</code> - the 0-based offset of the column in the table</dd> |
| <dd><code>context</code> - Context for creating the expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>default value expression</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="postExpressionConversionHook--"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>postExpressionConversionHook</h4> |
| <pre>public <a href="https://docs.oracle.com/javase/8/docs/api/java/util/function/BiFunction.html?is-external=true" title="java.util.function中的类或接口">BiFunction</a><<a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html" title="org.apache.calcite.sql2rel中的接口">InitializerContext</a>,<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>,<a href="../../../../org/apache/calcite/rel/RelNode.html" title="org.apache.calcite.rel中的接口">RelNode</a>> postExpressionConversionHook()</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#postExpressionConversionHook--">InitializerExpressionFactory</a></code></span></div> |
| <div class="block">Creates a hook function to customize the relational expression right after the column |
| expressions are converted. Usually the relational expression is a projection |
| above a table scan.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#postExpressionConversionHook--">postExpressionConversionHook</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>a hook function to transform the relational expression |
| right after the column expression conversion to a customized one</dd> |
| <dt><span class="seeLabel">另请参阅:</span></dt> |
| <dd><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#newColumnDefaultValue-org.apache.calcite.plan.RelOptTable-int-org.apache.calcite.sql2rel.InitializerContext-"><code>InitializerExpressionFactory.newColumnDefaultValue(RelOptTable, int, InitializerContext)</code></a></dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="newAttributeInitializer-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.SqlFunction-int-java.util.List-org.apache.calcite.sql2rel.InitializerContext-"> |
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| <h4>newAttributeInitializer</h4> |
| <pre>public <a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a> newAttributeInitializer(<a href="../../../../org/apache/calcite/rel/type/RelDataType.html" title="org.apache.calcite.rel.type中的接口">RelDataType</a> type, |
| <a href="../../../../org/apache/calcite/sql/SqlFunction.html" title="org.apache.calcite.sql中的类">SqlFunction</a> constructor, |
| int iAttribute, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="java.util中的类或接口">List</a><<a href="../../../../org/apache/calcite/rex/RexNode.html" title="org.apache.calcite.rex中的类">RexNode</a>> constructorArgs, |
| <a href="../../../../org/apache/calcite/sql2rel/InitializerContext.html" title="org.apache.calcite.sql2rel中的接口">InitializerContext</a> context)</pre> |
| <div class="block"><span class="descfrmTypeLabel">从接口复制的说明: <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#newAttributeInitializer-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.SqlFunction-int-java.util.List-org.apache.calcite.sql2rel.InitializerContext-">InitializerExpressionFactory</a></code></span></div> |
| <div class="block">Creates an expression which evaluates to the initializer expression for a |
| particular attribute of a structured type.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">指定者:</span></dt> |
| <dd><code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html#newAttributeInitializer-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.SqlFunction-int-java.util.List-org.apache.calcite.sql2rel.InitializerContext-">newAttributeInitializer</a></code> 在接口中 <code><a href="../../../../org/apache/calcite/sql2rel/InitializerExpressionFactory.html" title="org.apache.calcite.sql2rel中的接口">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="paramLabel">参数:</span></dt> |
| <dd><code>type</code> - the structured type</dd> |
| <dd><code>constructor</code> - the constructor invoked to initialize the type</dd> |
| <dd><code>iAttribute</code> - the 0-based offset of the attribute in the type</dd> |
| <dd><code>constructorArgs</code> - arguments passed to the constructor invocation</dd> |
| <dd><code>context</code> - Context for creating the expression</dd> |
| <dt><span class="returnLabel">返回:</span></dt> |
| <dd>default value expression</dd> |
| </dl> |
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