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| <div class="subTitle"><span class="packageLabelInType">Package</span> <a href="package-summary.html">org.apache.calcite.sql.validate.implicit</a></div> |
| <h1 title="Class AbstractTypeCoercion" class="title">Class AbstractTypeCoercion</h1> |
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| <div class="inheritance" title="Inheritance Tree"><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">java.lang.Object</a> |
| <div class="inheritance">org.apache.calcite.sql.validate.implicit.AbstractTypeCoercion</div> |
| </div> |
| <section class="description"> |
| <dl> |
| <dt>All Implemented Interfaces:</dt> |
| <dd><code><a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></code></dd> |
| </dl> |
| <dl> |
| <dt>Direct Known Subclasses:</dt> |
| <dd><code><a href="TypeCoercionImpl.html" title="class in org.apache.calcite.sql.validate.implicit">TypeCoercionImpl</a></code></dd> |
| </dl> |
| <hr> |
| <pre>public abstract class <span class="typeNameLabel">AbstractTypeCoercion</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="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></pre> |
| <div class="block">Base class for all the type coercion rules. If you want to have a custom type coercion rules, |
| inheriting this class is not necessary, but would have some convenient tool methods. |
| |
| <p>We make tool methods: <a href="#coerceOperandType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,int,org.apache.calcite.rel.type.RelDataType)"><code>coerceOperandType(org.apache.calcite.sql.validate.SqlValidatorScope, org.apache.calcite.sql.SqlCall, int, org.apache.calcite.rel.type.RelDataType)</code></a>, <a href="#coerceColumnType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNodeList,int,org.apache.calcite.rel.type.RelDataType)"><code>coerceColumnType(org.apache.calcite.sql.validate.SqlValidatorScope, org.apache.calcite.sql.SqlNodeList, int, org.apache.calcite.rel.type.RelDataType)</code></a>, |
| <a href="#needToCast(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,org.apache.calcite.rel.type.RelDataType)"><code>needToCast(org.apache.calcite.sql.validate.SqlValidatorScope, org.apache.calcite.sql.SqlNode, org.apache.calcite.rel.type.RelDataType)</code></a>, <a href="#updateInferredType(org.apache.calcite.sql.SqlNode,org.apache.calcite.rel.type.RelDataType)"><code>updateInferredType(org.apache.calcite.sql.SqlNode, org.apache.calcite.rel.type.RelDataType)</code></a>, <a href="#updateInferredColumnType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,int,org.apache.calcite.rel.type.RelDataType)"><code>updateInferredColumnType(org.apache.calcite.sql.validate.SqlValidatorScope, org.apache.calcite.sql.SqlNode, int, org.apache.calcite.rel.type.RelDataType)</code></a> |
| all overridable by derived classes, you can define system specific type coercion logic. |
| |
| <p>Caution that these methods may modify the <a href="../../SqlNode.html" title="class in org.apache.calcite.sql"><code>SqlNode</code></a> tree, you should know what the |
| effect is when using these methods to customize your type coercion rules. |
| |
| <p>This class also defines the default implementation of the type widening strategies, see |
| <a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit"><code>TypeCoercion</code></a> doc and methods: <a href="#getTightestCommonType(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)"><code>getTightestCommonType(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType)</code></a>, <a href="#getWiderTypeFor(java.util.List,boolean)"><code>getWiderTypeFor(java.util.List<org.apache.calcite.rel.type.RelDataType>, boolean)</code></a>, |
| <a href="#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)"><code>getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType, boolean)</code></a>, <a href="#getWiderTypeForDecimal(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)"><code>getWiderTypeForDecimal(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType)</code></a>, |
| <a href="#commonTypeForBinaryComparison(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)"><code>commonTypeForBinaryComparison(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType)</code></a> for the detail strategies.</div> |
| </section> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Field</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#factory">factory</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>protected <a href="../SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#validator">validator</a></span></code></th> |
| <td class="colLast"> </td> |
| </tr> |
| </tbody> |
| </table> |
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| <h2>Method Summary</h2> |
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| <div role="tablist" aria-orientation="horizontal"><button role="tab" aria-selected="true" aria-controls="memberSummary_tabpanel" tabindex="0" onkeydown="switchTab(event)" id="t0" class="activeTableTab">All Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t2" class="tableTab" onclick="show(2);">Instance Methods</button><button role="tab" aria-selected="false" aria-controls="memberSummary_tabpanel" tabindex="-1" onkeydown="switchTab(event)" id="t4" class="tableTab" onclick="show(8);">Concrete Methods</button></div> |
| <div id="memberSummary_tabpanel" role="tabpanel"> |
| <table aria-labelledby="t0"> |
| <thead> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colSecond" scope="col">Method</th> |
| <th class="colLast" scope="col">Description</th> |
| </tr> |
| </thead> |
| <tbody> |
| <tr class="altColor" id="i0"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#coerceColumnType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNodeList,int,org.apache.calcite.rel.type.RelDataType)">coerceColumnType</a></span>​(@Nullable <a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlNodeList.html" title="class in org.apache.calcite.sql">SqlNodeList</a> nodeList, |
| int index, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetType)</code></th> |
| <td class="colLast"> |
| <div class="block">Cast column at index <code>index</code> to target type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i1"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#coerceOperandsType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,org.apache.calcite.rel.type.RelDataType)">coerceOperandsType</a></span>​(@Nullable <a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> call, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> commonType)</code></th> |
| <td class="colLast"> |
| <div class="block">Coerce all the operands to <code>commonType</code>.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i2"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#coerceOperandType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,int,org.apache.calcite.rel.type.RelDataType)">coerceOperandType</a></span>​(@Nullable <a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> call, |
| int index, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetType)</code></th> |
| <td class="colLast"> |
| <div class="block">Cast operand at index <code>index</code> to target type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i3"> |
| <td class="colFirst"><code>@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#commonTypeForBinaryComparison(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">commonTypeForBinaryComparison</a></span>​(@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2)</code></th> |
| <td class="colLast"> |
| <div class="block">Determines common type for a comparison operator when one operand is String type and the |
| other is not.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i4"> |
| <td class="colFirst"><code>@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getTightestCommonType(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">getTightestCommonType</a></span>​(@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2)</code></th> |
| <td class="colLast"> |
| <div class="block">Case1: type widening with no precision loss.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i5"> |
| <td class="colFirst"><code>@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getWiderTypeFor(java.util.List,boolean)">getWiderTypeFor</a></span>​(<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="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> typeList, |
| boolean stringPromotion)</code></th> |
| <td class="colLast"> |
| <div class="block">Similar to <a href="#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)"><code>getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType, boolean)</code></a>, but can handle |
| sequence types.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i6"> |
| <td class="colFirst"><code>@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getWiderTypeForDecimal(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">getWiderTypeForDecimal</a></span>​(@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2)</code></th> |
| <td class="colLast"> |
| <div class="block">Finds a wider type when one or both types are decimal type.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i7"> |
| <td class="colFirst"><code>@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)">getWiderTypeForTwo</a></span>​(@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2, |
| boolean stringPromotion)</code></th> |
| <td class="colLast"> |
| <div class="block">Case2: type widening.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i8"> |
| <td class="colFirst"><code>@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#implicitCast(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.type.SqlTypeFamily)">implicitCast</a></span>​(<a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> in, |
| <a href="../../type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type">SqlTypeFamily</a> expected)</code></th> |
| <td class="colLast"> |
| <div class="block">Type coercion based on the inferred type from passed in operand |
| and the <a href="../../type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type"><code>SqlTypeFamily</code></a> defined in the checkers, |
| e.g.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i9"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#needToCast(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,org.apache.calcite.rel.type.RelDataType)">needToCast</a></span>​(<a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> node, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> toType)</code></th> |
| <td class="colLast"> |
| <div class="block">Decide if a SqlNode should be casted to target type, derived class |
| can override this strategy.</div> |
| </td> |
| </tr> |
| <tr class="altColor" id="i10"> |
| <td class="colFirst"><code>protected void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#updateInferredColumnType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,int,org.apache.calcite.rel.type.RelDataType)">updateInferredColumnType</a></span>​(<a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> query, |
| int columnIndex, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> desiredType)</code></th> |
| <td class="colLast"> |
| <div class="block">Update inferred row type for a query, i.e.</div> |
| </td> |
| </tr> |
| <tr class="rowColor" id="i11"> |
| <td class="colFirst"><code>protected void</code></td> |
| <th class="colSecond" scope="row"><code><span class="memberNameLink"><a href="#updateInferredType(org.apache.calcite.sql.SqlNode,org.apache.calcite.rel.type.RelDataType)">updateInferredType</a></span>​(<a href="../../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> node, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type)</code></th> |
| <td class="colLast"> |
| <div class="block">Update inferred type for a SqlNode.</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> |
| <a id="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </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> |
| <div class="inheritedList"> |
| <h3>Methods inherited from interface org.apache.calcite.sql.validate.implicit.<a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></h3> |
| <a id="methods.inherited.from.class.org.apache.calcite.sql.validate.implicit.TypeCoercion"> |
| <!-- --> |
| </a><code><a href="TypeCoercion.html#binaryArithmeticCoercion(org.apache.calcite.sql.SqlCallBinding)">binaryArithmeticCoercion</a>, <a href="TypeCoercion.html#binaryComparisonCoercion(org.apache.calcite.sql.SqlCallBinding)">binaryComparisonCoercion</a>, <a href="TypeCoercion.html#builtinFunctionCoercion(org.apache.calcite.sql.SqlCallBinding,java.util.List,java.util.List)">builtinFunctionCoercion</a>, <a href="TypeCoercion.html#caseWhenCoercion(org.apache.calcite.sql.SqlCallBinding)">caseWhenCoercion</a>, <a href="TypeCoercion.html#inOperationCoercion(org.apache.calcite.sql.SqlCallBinding)">inOperationCoercion</a>, <a href="TypeCoercion.html#querySourceCoercion(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.SqlNode)">querySourceCoercion</a>, <a href="TypeCoercion.html#rowTypeCoercion(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,int,org.apache.calcite.rel.type.RelDataType)">rowTypeCoercion</a>, <a href="TypeCoercion.html#userDefinedFunctionCoercion(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,org.apache.calcite.sql.SqlFunction)">userDefinedFunctionCoercion</a></code></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| <section class="details"> |
| <ul class="blockList"> |
| <!-- ============ FIELD DETAIL =========== --> |
| <li class="blockList"> |
| <section class="fieldDetails"><a id="field.detail"> |
| <!-- --> |
| </a> |
| <h2>Field Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="validator">validator</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="../SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a></span> <span class="memberName">validator</span></div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="factory">factory</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType"><a href="../../../rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a></span> <span class="memberName">factory</span></div> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| <!-- ============ METHOD DETAIL ========== --> |
| <li class="blockList"> |
| <section class="methodDetails"><a id="method.detail"> |
| <!-- --> |
| </a> |
| <h2>Method Details</h2> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="coerceOperandType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,int,org.apache.calcite.rel.type.RelDataType)">coerceOperandType</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType">boolean</span> <span class="memberName">coerceOperandType</span>​(<span class="arguments">@Nullable <a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> call, |
| int index, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetType)</span></div> |
| <div class="block">Cast operand at index <code>index</code> to target type. |
| we do this base on the fact that validate happens before type coercion.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="coerceOperandsType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlCall,org.apache.calcite.rel.type.RelDataType)">coerceOperandsType</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType">boolean</span> <span class="memberName">coerceOperandsType</span>​(<span class="arguments">@Nullable <a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> call, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> commonType)</span></div> |
| <div class="block">Coerce all the operands to <code>commonType</code>.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>scope</code> - Validator scope</dd> |
| <dd><code>call</code> - the call</dd> |
| <dd><code>commonType</code> - common type to coerce to</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="coerceColumnType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNodeList,int,org.apache.calcite.rel.type.RelDataType)">coerceColumnType</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType">boolean</span> <span class="memberName">coerceColumnType</span>​(<span class="arguments">@Nullable <a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlNodeList.html" title="class in org.apache.calcite.sql">SqlNodeList</a> nodeList, |
| int index, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetType)</span></div> |
| <div class="block">Cast column at index <code>index</code> to target type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>scope</code> - Validator scope for the node list</dd> |
| <dd><code>nodeList</code> - Column node list</dd> |
| <dd><code>index</code> - Index of column</dd> |
| <dd><code>targetType</code> - Target type to cast to</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="needToCast(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,org.apache.calcite.rel.type.RelDataType)">needToCast</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType">boolean</span> <span class="memberName">needToCast</span>​(<span class="arguments"><a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> node, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> toType)</span></div> |
| <div class="block">Decide if a SqlNode should be casted to target type, derived class |
| can override this strategy.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="updateInferredType(org.apache.calcite.sql.SqlNode,org.apache.calcite.rel.type.RelDataType)">updateInferredType</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType">void</span> <span class="memberName">updateInferredType</span>​(<span class="arguments"><a href="../../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> node, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type)</span></div> |
| <div class="block">Update inferred type for a SqlNode.</div> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="updateInferredColumnType(org.apache.calcite.sql.validate.SqlValidatorScope,org.apache.calcite.sql.SqlNode,int,org.apache.calcite.rel.type.RelDataType)">updateInferredColumnType</a></h3> |
| <div class="memberSignature"><span class="modifiers">protected</span> <span class="returnType">void</span> <span class="memberName">updateInferredColumnType</span>​(<span class="arguments"><a href="../SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> query, |
| int columnIndex, |
| <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> desiredType)</span></div> |
| <div class="block">Update inferred row type for a query, i.e. SqlCall that returns struct type |
| or SqlSelect.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>scope</code> - Validator scope</dd> |
| <dd><code>query</code> - Node to inferred type</dd> |
| <dd><code>columnIndex</code> - Column index to update</dd> |
| <dd><code>desiredType</code> - Desired column type</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getTightestCommonType(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">getTightestCommonType</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">getTightestCommonType</span>​(<span class="arguments">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2)</span></div> |
| <div class="block">Case1: type widening with no precision loss. |
| Find the tightest common type of two types that might be used in binary expression.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="TypeCoercion.html#getTightestCommonType(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">getTightestCommonType</a></code> in interface <code><a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></code></dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>tightest common type, i.e. INTEGER + DECIMAL(10, 2) returns DECIMAL(10, 2)</dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="commonTypeForBinaryComparison(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">commonTypeForBinaryComparison</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">commonTypeForBinaryComparison</span>​(<span class="arguments">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2)</span></div> |
| <div class="block">Determines common type for a comparison operator when one operand is String type and the |
| other is not. For date + timestamp operands, use timestamp as common type, |
| i.e. Timestamp(2017-01-01 00:00 ...) > Date(2018) evaluates to be false.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="TypeCoercion.html#commonTypeForBinaryComparison(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">commonTypeForBinaryComparison</a></code> in interface <code><a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)">getWiderTypeForTwo</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">getWiderTypeForTwo</span>​(<span class="arguments">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2, |
| boolean stringPromotion)</span></div> |
| <div class="block">Case2: type widening. The main difference with <a href="#getTightestCommonType(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)"><code>getTightestCommonType(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType)</code></a> |
| is that we allow some precision loss when widening decimal to fractional, |
| or promote fractional to string type.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="TypeCoercion.html#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)">getWiderTypeForTwo</a></code> in interface <code><a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getWiderTypeForDecimal(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">getWiderTypeForDecimal</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">getWiderTypeForDecimal</span>​(<span class="arguments">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type1, |
| @Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> type2)</span></div> |
| <div class="block">Finds a wider type when one or both types are decimal type. |
| If the wider decimal type's precision/scale exceeds system limitation, |
| this rule will truncate the decimal type to the max precision/scale. |
| For decimal and fractional types, returns a decimal type |
| which has the higher precision of the two. |
| |
| <p>The default implementation depends on the max precision/scale of the type system, |
| you can override it based on the specific system requirement in |
| <a href="../../../rel/type/RelDataTypeSystem.html" title="interface in org.apache.calcite.rel.type"><code>RelDataTypeSystem</code></a>.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="TypeCoercion.html#getWiderTypeForDecimal(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType)">getWiderTypeForDecimal</a></code> in interface <code><a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="getWiderTypeFor(java.util.List,boolean)">getWiderTypeFor</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">getWiderTypeFor</span>​(<span class="arguments"><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="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> typeList, |
| boolean stringPromotion)</span></div> |
| <div class="block">Similar to <a href="#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)"><code>getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType, boolean)</code></a>, but can handle |
| sequence types. <a href="#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)"><code>getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType, boolean)</code></a> doesn't satisfy the associative law, |
| i.e. (a op b) op c may not equal to a op (b op c). This is only a problem for STRING type or |
| nested STRING type in collection type like ARRAY. Excluding these types, |
| <a href="#getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.rel.type.RelDataType,boolean)"><code>getWiderTypeForTwo(org.apache.calcite.rel.type.RelDataType, org.apache.calcite.rel.type.RelDataType, boolean)</code></a> satisfies the associative law. For instance, |
| (DATE, INTEGER, VARCHAR) should have VARCHAR as the wider common type.</div> |
| <dl> |
| <dt><span class="overrideSpecifyLabel">Specified by:</span></dt> |
| <dd><code><a href="TypeCoercion.html#getWiderTypeFor(java.util.List,boolean)">getWiderTypeFor</a></code> in interface <code><a href="TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></code></dd> |
| </dl> |
| </section> |
| </li> |
| <li class="blockList"> |
| <section class="detail"> |
| <h3><a id="implicitCast(org.apache.calcite.rel.type.RelDataType,org.apache.calcite.sql.type.SqlTypeFamily)">implicitCast</a></h3> |
| <div class="memberSignature"><span class="modifiers">public</span> <span class="returnType">@Nullable <a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></span> <span class="memberName">implicitCast</span>​(<span class="arguments"><a href="../../../rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> in, |
| <a href="../../type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type">SqlTypeFamily</a> expected)</span></div> |
| <div class="block">Type coercion based on the inferred type from passed in operand |
| and the <a href="../../type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type"><code>SqlTypeFamily</code></a> defined in the checkers, |
| e.g. the <a href="../../type/FamilyOperandTypeChecker.html" title="class in org.apache.calcite.sql.type"><code>FamilyOperandTypeChecker</code></a>. |
| |
| <p>Caution that we do not cast from NUMERIC to NUMERIC. |
| See <a href="https://docs.google.com/spreadsheets/d/1GhleX5h5W8-kJKh7NMJ4vtoE78pwfaZRJl88ULX_MgU/edit?usp=sharing">CalciteImplicitCasts</a> |
| for the details.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>in</code> - Inferred operand type</dd> |
| <dd><code>expected</code> - Expected <a href="../../type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type"><code>SqlTypeFamily</code></a> of registered SqlFunction</dd> |
| <dt><span class="returnLabel">Returns:</span></dt> |
| <dd>common type of implicit cast, null if we do not find any</dd> |
| </dl> |
| </section> |
| </li> |
| </ul> |
| </section> |
| </li> |
| </ul> |
| </section> |
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