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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.sql2rel</a></div> |
| <h1 title="Class NullInitializerExpressionFactory" class="title">Class NullInitializerExpressionFactory</h1> |
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| <div class="inheritance">org.apache.calcite.sql2rel.NullInitializerExpressionFactory</div> |
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| <section class="description"> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public class <span class="typeNameLabel">NullInitializerExpressionFactory</span> |
| extends <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> |
| implements <a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></pre> |
| <div class="block">An implementation of <a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel"><code>InitializerExpressionFactory</code></a> that always supplies NULL.</div> |
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| <tr class="altColor"> |
| <td class="colFirst"><code>static <a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#INSTANCE">INSTANCE</a></span></code></th> |
| <td class="colLast"> </td> |
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| <th class="colConstructorName" scope="row"><code><span class="memberNameLink"><a href="#%3Cinit%3E()">NullInitializerExpressionFactory</a></span>()</code></th> |
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| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code><a href="../schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#generationStrategy(org.apache.calcite.plan.RelOptTable,int)">generationStrategy</a></span>​(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</code></th> |
| <td class="colLast"> |
| <div class="block">Returns how a column is populated.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#isGeneratedAlways(org.apache.calcite.plan.RelOptTable,int)">isGeneratedAlways</a></span>​(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</code></th> |
| <td class="colLast"> |
| <div class="block">Whether a column is always generated.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#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="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type, |
| <a href="../sql/SqlFunction.html" title="class in org.apache.calcite.sql">SqlFunction</a> constructor, |
| int iAttribute, |
| <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>> constructorArgs, |
| <a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a> context)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates an expression which evaluates to the initializer expression for a |
| particular attribute of a structured type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)">newColumnDefaultValue</a></span>​(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn, |
| <a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a> context)</code></th> |
| <td class="colLast"> |
| <div class="block">Creates an expression which evaluates to the default value for a |
| particular column.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code>@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/function/BiFunction.html?is-external=true" title="class or interface in java.util.function" class="externalLink">BiFunction</a><<a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a>,​<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>,​<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#postExpressionConversionHook()">postExpressionConversionHook</a></span>()</code></th> |
| <td class="colLast"> |
| <div class="block">Creates a hook function to customize the relational expression right after the column |
| expressions are converted.</div> |
| </td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| <div class="inheritedList"> |
| <h3>Methods inherited from class java.lang.<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></h3> |
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| </a><code><a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang" class="externalLink">clone</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang" class="externalLink">equals</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang" class="externalLink">finalize</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang" class="externalLink">getClass</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang" class="externalLink">hashCode</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang" class="externalLink">notify</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang" class="externalLink">notifyAll</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang" class="externalLink">toString</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang" class="externalLink">wait</a>, <a href="https://docs.oracle.com/javase/9/docs/api/java/lang/Object.html?is-external=true#wait(long,int)" title="class or interface in java.lang" class="externalLink">wait</a></code></div> |
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| <div class="memberSignature"><span class="modifiers">public static final</span> <span class="returnType"><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></span> <span class="memberName">INSTANCE</span></div> |
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| <h3><a id="<init>()">NullInitializerExpressionFactory</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="memberName">NullInitializerExpressionFactory</span>()</div> |
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| <h3><a id="isGeneratedAlways(org.apache.calcite.plan.RelOptTable,int)">isGeneratedAlways</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">boolean</span> <span class="memberName">isGeneratedAlways</span>​(<span class="arguments"><a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</span></div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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">Specified by:</span></dt> |
| <dd><code><a href="InitializerExpressionFactory.html#isGeneratedAlways(org.apache.calcite.plan.RelOptTable,int)">isGeneratedAlways</a></code> in interface <code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="InitializerExpressionFactory.html#generationStrategy(org.apache.calcite.plan.RelOptTable,int)"><code>InitializerExpressionFactory.generationStrategy(RelOptTable, int)</code></a></dd> |
| </dl> |
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| <section class="detail"> |
| <h3><a id="generationStrategy(org.apache.calcite.plan.RelOptTable,int)">generationStrategy</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a></span> <span class="memberName">generationStrategy</span>​(<span class="arguments"><a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</span></div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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">Specified by:</span></dt> |
| <dd><code><a href="InitializerExpressionFactory.html#generationStrategy(org.apache.calcite.plan.RelOptTable,int)">generationStrategy</a></code> in interface <code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</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">Returns:</span></dt> |
| <dd>generation strategy, never null</dd> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../plan/RelOptTable.html#getColumnStrategies()"><code>RelOptTable.getColumnStrategies()</code></a></dd> |
| </dl> |
| </section> |
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| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)">newColumnDefaultValue</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">newColumnDefaultValue</span>​(<span class="arguments"><a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn, |
| <a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a> context)</span></div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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="../sql/SqlNode.html" title="class in org.apache.calcite.sql"><code>SqlNode</code></a>, |
| make sure to invoke <a href="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="InitializerContext.html#convertExpression(org.apache.calcite.sql.SqlNode)"><code>InitializerContext.convertExpression(org.apache.calcite.sql.SqlNode)</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="InitializerExpressionFactory.html#newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)">newColumnDefaultValue</a></code> in interface <code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</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">Returns:</span></dt> |
| <dd>default value expression</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="postExpressionConversionHook()">postExpressionConversionHook</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="https://docs.oracle.com/javase/9/docs/api/java/util/function/BiFunction.html?is-external=true" title="class or interface in java.util.function" class="externalLink">BiFunction</a><<a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a>,​<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>,​<a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>></span> <span class="memberName">postExpressionConversionHook</span>()</div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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">Specified by:</span></dt> |
| <dd><code><a href="InitializerExpressionFactory.html#postExpressionConversionHook()">postExpressionConversionHook</a></code> in interface <code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="returnLabel">Returns:</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">See Also:</span></dt> |
| <dd><a href="InitializerExpressionFactory.html#newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)"><code>InitializerExpressionFactory.newColumnDefaultValue(RelOptTable, int, InitializerContext)</code></a></dd> |
| </dl> |
| </section> |
| </li> |
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| <h3><a id="newAttributeInitializer(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.SqlFunction,int,java.util.List,org.apache.calcite.sql2rel.InitializerContext)">newAttributeInitializer</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="memberName">newAttributeInitializer</span>​(<span class="arguments"><a href="../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type, |
| <a href="../sql/SqlFunction.html" title="class in org.apache.calcite.sql">SqlFunction</a> constructor, |
| int iAttribute, |
| <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>> constructorArgs, |
| <a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a> context)</span></div> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="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">Specified by:</span></dt> |
| <dd><code><a href="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> in interface <code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| <dt><span class="paramLabel">Parameters:</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">Returns:</span></dt> |
| <dd>default value expression</dd> |
| </dl> |
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