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| <li>Summary: </li> |
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| <div class="sub-title"><span class="package-label-in-type">Package</span> <a href="package-summary.html">org.apache.calcite.sql2rel</a></div> |
| <h1 title="Class NullInitializerExpressionFactory" class="title">Class NullInitializerExpressionFactory</h1> |
| </div> |
| <div class="inheritance" title="Inheritance Tree"><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">java.lang.Object</a> |
| <div class="inheritance">org.apache.calcite.sql2rel.NullInitializerExpressionFactory</div> |
| </div> |
| <section class="class-description" id="class-description"> |
| <dl class="notes"> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></dd> |
| </dl> |
| <dl class="notes"> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="../test/catalog/CountingFactory.html" title="class in org.apache.calcite.test.catalog">CountingFactory</a></code>, <code><a href="../test/catalog/VirtualColumnsExpressionFactory.html" title="class in org.apache.calcite.test.catalog">VirtualColumnsExpressionFactory</a></code></dd> |
| </dl> |
| <hr> |
| <div class="type-signature"><span class="modifiers">public class </span><span class="element-name type-name-label">NullInitializerExpressionFactory</span> |
| <span class="extends-implements">extends <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a> |
| implements <a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></span></div> |
| <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> |
| </section> |
| <section class="summary"> |
| <ul class="summary-list"> |
| <!-- =========== FIELD SUMMARY =========== --> |
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| <section class="field-summary" id="field-summary"> |
| <h2>Field Summary</h2> |
| <div class="caption"><span>Fields</span></div> |
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| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Field</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color"><code>static final <a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></code></div> |
| <div class="col-second even-row-color"><code><a href="#INSTANCE" class="member-name-link">INSTANCE</a></code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <li> |
| <section class="constructor-summary" id="constructor-summary"> |
| <h2>Constructor Summary</h2> |
| <div class="caption"><span>Constructors</span></div> |
| <div class="summary-table two-column-summary"> |
| <div class="table-header col-first">Constructor</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-constructor-name even-row-color"><code><a href="#%3Cinit%3E()" class="member-name-link">NullInitializerExpressionFactory</a>()</code></div> |
| <div class="col-last even-row-color"> </div> |
| </div> |
| </section> |
| </li> |
| <!-- ========== METHOD SUMMARY =========== --> |
| <li> |
| <section class="method-summary" id="method-summary"> |
| <h2>Method Summary</h2> |
| <div id="method-summary-table"> |
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| <div id="method-summary-table.tabpanel" role="tabpanel"> |
| <div class="summary-table three-column-summary" aria-labelledby="method-summary-table-tab0"> |
| <div class="table-header col-first">Modifier and Type</div> |
| <div class="table-header col-second">Method</div> |
| <div class="table-header col-last">Description</div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#generationStrategy(org.apache.calcite.plan.RelOptTable,int)" class="member-name-link">generationStrategy</a><wbr>(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Returns how a column is populated.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>boolean</code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#isGeneratedAlways(org.apache.calcite.plan.RelOptTable,int)" class="member-name-link">isGeneratedAlways</a><wbr>(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</code></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Whether a column is always generated.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#newAttributeInitializer(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.SqlFunction,int,java.util.List,org.apache.calcite.sql2rel.InitializerContext)" class="member-name-link">newAttributeInitializer</a><wbr>(<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/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">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></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Creates an expression which evaluates to the initializer expression for a |
| particular attribute of a structured type.</div> |
| </div> |
| <div class="col-first odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></code></div> |
| <div class="col-second odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)" class="member-name-link">newColumnDefaultValue</a><wbr>(<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></div> |
| <div class="col-last odd-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Creates an expression which evaluates to the default value for a |
| particular column.</div> |
| </div> |
| <div class="col-first even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code>@Nullable <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/function/BiFunction.html" title="class or interface in java.util.function" class="external-link">BiFunction</a><<a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a>,<wbr><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>,<wbr><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>></code></div> |
| <div class="col-second even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"><code><a href="#postExpressionConversionHook()" class="member-name-link">postExpressionConversionHook</a>()</code></div> |
| <div class="col-last even-row-color method-summary-table method-summary-table-tab2 method-summary-table-tab4"> |
| <div class="block">Creates a hook function to customize the relational expression right after the column |
| expressions are converted.</div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="inherited-list"> |
| <h3 id="methods-inherited-from-class-java.lang.Object">Methods inherited from class java.lang.<a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html" title="class or interface in java.lang" class="external-link">Object</a></h3> |
| <code><a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#clone()" title="class or interface in java.lang" class="external-link">clone</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#equals(java.lang.Object)" title="class or interface in java.lang" class="external-link">equals</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#finalize()" title="class or interface in java.lang" class="external-link">finalize</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#getClass()" title="class or interface in java.lang" class="external-link">getClass</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#hashCode()" title="class or interface in java.lang" class="external-link">hashCode</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notify()" title="class or interface in java.lang" class="external-link">notify</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#notifyAll()" title="class or interface in java.lang" class="external-link">notifyAll</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#toString()" title="class or interface in java.lang" class="external-link">toString</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait()" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long)" title="class or interface in java.lang" class="external-link">wait</a>, <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/lang/Object.html#wait(long,int)" title="class or interface in java.lang" class="external-link">wait</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="details-list"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li> |
| <section class="field-details" id="field-detail"> |
| <h2>Field Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="INSTANCE"> |
| <h3>INSTANCE</h3> |
| <div class="member-signature"><span class="modifiers">public static final</span> <span class="return-type"><a href="InitializerExpressionFactory.html" title="interface in org.apache.calcite.sql2rel">InitializerExpressionFactory</a></span> <span class="element-name">INSTANCE</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <li> |
| <section class="constructor-details" id="constructor-detail"> |
| <h2>Constructor Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="<init>()"> |
| <h3>NullInitializerExpressionFactory</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="element-name">NullInitializerExpressionFactory</span>()</div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li> |
| <section class="method-details" id="method-detail"> |
| <h2>Method Details</h2> |
| <ul class="member-list"> |
| <li> |
| <section class="detail" id="isGeneratedAlways(org.apache.calcite.plan.RelOptTable,int)"> |
| <h3>isGeneratedAlways</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">boolean</span> <span class="element-name">isGeneratedAlways</span><wbr><span class="parameters">(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</span></div> |
| <div class="block"><span class="descfrm-type-label">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 class="notes"> |
| <dt>Specified by:</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>See Also:</dt> |
| <dd> |
| <ul class="see-list-long"> |
| <li><a href="InitializerExpressionFactory.html#generationStrategy(org.apache.calcite.plan.RelOptTable,int)"><code>InitializerExpressionFactory.generationStrategy(RelOptTable, int)</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="generationStrategy(org.apache.calcite.plan.RelOptTable,int)"> |
| <h3>generationStrategy</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../schema/ColumnStrategy.html" title="enum in org.apache.calcite.schema">ColumnStrategy</a></span> <span class="element-name">generationStrategy</span><wbr><span class="parameters">(<a href="../plan/RelOptTable.html" title="interface in org.apache.calcite.plan">RelOptTable</a> table, |
| int iColumn)</span></div> |
| <div class="block"><span class="descfrm-type-label">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 class="notes"> |
| <dt>Specified by:</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>Parameters:</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>Returns:</dt> |
| <dd>generation strategy, never null</dd> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list-long"> |
| <li><a href="../plan/RelOptTable.html#getColumnStrategies()"><code>RelOptTable.getColumnStrategies()</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)"> |
| <h3>newColumnDefaultValue</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="element-name">newColumnDefaultValue</span><wbr><span class="parameters">(<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="descfrm-type-label">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 class="notes"> |
| <dt>Specified by:</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>Parameters:</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>Returns:</dt> |
| <dd>default value expression</dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="postExpressionConversionHook()"> |
| <h3>postExpressionConversionHook</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type">@Nullable <a href="https://docs.oracle.com/en/java/javase/17/docs/api/java.base/java/util/function/BiFunction.html" title="class or interface in java.util.function" class="external-link">BiFunction</a><<a href="InitializerContext.html" title="interface in org.apache.calcite.sql2rel">InitializerContext</a>,<wbr><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>,<wbr><a href="../rel/RelNode.html" title="interface in org.apache.calcite.rel">RelNode</a>></span> <span class="element-name">postExpressionConversionHook</span>()</div> |
| <div class="block"><span class="descfrm-type-label">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 class="notes"> |
| <dt>Specified by:</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>Returns:</dt> |
| <dd>a hook function to transform the relational expression |
| right after the column expression conversion to a customized one</dd> |
| <dt>See Also:</dt> |
| <dd> |
| <ul class="see-list-long"> |
| <li><a href="InitializerExpressionFactory.html#newColumnDefaultValue(org.apache.calcite.plan.RelOptTable,int,org.apache.calcite.sql2rel.InitializerContext)"><code>InitializerExpressionFactory.newColumnDefaultValue(RelOptTable, int, InitializerContext)</code></a></li> |
| </ul> |
| </dd> |
| </dl> |
| </section> |
| </li> |
| <li> |
| <section class="detail" id="newAttributeInitializer(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.SqlFunction,int,java.util.List,org.apache.calcite.sql2rel.InitializerContext)"> |
| <h3>newAttributeInitializer</h3> |
| <div class="member-signature"><span class="modifiers">public</span> <span class="return-type"><a href="../rex/RexNode.html" title="class in org.apache.calcite.rex">RexNode</a></span> <span class="element-name">newAttributeInitializer</span><wbr><span class="parameters">(<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/en/java/javase/17/docs/api/java.base/java/util/List.html" title="class or interface in java.util" class="external-link">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="descfrm-type-label">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 class="notes"> |
| <dt>Specified by:</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>Parameters:</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>Returns:</dt> |
| <dd>default value expression</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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