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| <div class="subTitle">org.apache.calcite.sql.validate.implicit</div> |
| <h2 title="Class TypeCoercionImpl" class="title">Class TypeCoercionImpl</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="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li><a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html" title="class in org.apache.calcite.sql.validate.implicit">org.apache.calcite.sql.validate.implicit.AbstractTypeCoercion</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>org.apache.calcite.sql.validate.implicit.TypeCoercionImpl</li> |
| </ul> |
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| <dt>All Implemented Interfaces:</dt> |
| <dd><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercion.html" title="interface in org.apache.calcite.sql.validate.implicit">TypeCoercion</a></dd> |
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| <pre>public class <span class="typeNameLabel">TypeCoercionImpl</span> |
| extends <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html" title="class in org.apache.calcite.sql.validate.implicit">AbstractTypeCoercion</a></pre> |
| <div class="block">Default implementation of Calcite implicit type cast.</div> |
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| <h3>Field Summary</h3> |
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| <li class="blockList"><a name="fields.inherited.from.class.org.apache.calcite.sql.validate.implicit.AbstractTypeCoercion"> |
| <!-- --> |
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| <h3>Fields inherited from class org.apache.calcite.sql.validate.implicit.<a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html" title="class in org.apache.calcite.sql.validate.implicit">AbstractTypeCoercion</a></h3> |
| <code><a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#factory">factory</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#validator">validator</a></code></li> |
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| <h3>Constructor Summary</h3> |
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| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#TypeCoercionImpl-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.sql.validate.SqlValidator-">TypeCoercionImpl</a></span>(<a href="../../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory, |
| <a href="../../../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a> validator)</code> </td> |
| </tr> |
| </table> |
| </li> |
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| <!-- ========== METHOD SUMMARY =========== --> |
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| <h3>Method Summary</h3> |
| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#binaryArithmeticCoercion-org.apache.calcite.sql.SqlCallBinding-">binaryArithmeticCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding)</code> |
| <div class="block">Coerces operands in binary arithmetic expressions to NUMERIC types.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#binaryArithmeticWithStrings-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">binaryArithmeticWithStrings</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> left, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> right)</code> |
| <div class="block">For NUMERIC and STRING operands, cast STRING to data type of the other operand.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#binaryComparisonCoercion-org.apache.calcite.sql.SqlCallBinding-">binaryComparisonCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding)</code> |
| <div class="block">Coerces operands in binary comparison expressions.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#booleanEquality-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">booleanEquality</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> left, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> right)</code> |
| <div class="block">Casts "BOOLEAN = NUMERIC" to "NUMERIC = NUMERIC".</div> |
| </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#builtinFunctionCoercion-org.apache.calcite.sql.SqlCallBinding-java.util.List-java.util.List-">builtinFunctionCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> operandTypes, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/calcite/sql/type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type">SqlTypeFamily</a>> expectedFamilies)</code> |
| <div class="block">Type coercion with inferred type from passed in arguments and the |
| <a href="../../../../../../org/apache/calcite/sql/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 id="i5" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#caseWhenCoercion-org.apache.calcite.sql.SqlCallBinding-">caseWhenCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> callBinding)</code> |
| <div class="block">CASE and COALESCE type coercion, collect all the branches types including then |
| operands and else operands to find a common type, then cast the operands to the common type |
| when needed.</div> |
| </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>protected <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#commonTypeForComparison-java.util.List-">commonTypeForComparison</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> dataTypes)</code> |
| <div class="block">Finds the common type for binary comparison |
| when the size of operands <code>dataTypes</code> is more than 2.</div> |
| </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>protected boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#dateTimeStringEquality-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">dateTimeStringEquality</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> left, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> right)</code> |
| <div class="block">Datetime and STRING equality: cast STRING type to datetime type, SqlToRelConverter already |
| makes the conversion but we still keep this interface overridable |
| so user can have their custom implementation.</div> |
| </td> |
| </tr> |
| <tr id="i8" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#inOperationCoercion-org.apache.calcite.sql.SqlCallBinding-">inOperationCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding)</code> |
| <div class="block">STRATEGIES</div> |
| </td> |
| </tr> |
| <tr id="i9" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.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></span>(<a href="../../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> sourceRowType, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetRowType, |
| <a href="../../../../../../org/apache/calcite/sql/SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> query)</code> |
| <div class="block">Coerces the source row expression to target type in an INSERT or UPDATE query.</div> |
| </td> |
| </tr> |
| <tr id="i10" class="altColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#rowTypeCoercion-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlNode-int-org.apache.calcite.rel.type.RelDataType-">rowTypeCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../../../../../org/apache/calcite/sql/SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> query, |
| int columnIndex, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetType)</code> |
| <div class="block">Widen a SqlNode's field type to common type, |
| mainly used for set operations like UNION, INTERSECT and EXCEPT.</div> |
| </td> |
| </tr> |
| <tr id="i11" class="rowColor"> |
| <td class="colFirst"><code>boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.html#userDefinedFunctionCoercion-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlCall-org.apache.calcite.sql.SqlFunction-">userDefinedFunctionCoercion</a></span>(<a href="../../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../../../../../org/apache/calcite/sql/SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> call, |
| <a href="../../../../../../org/apache/calcite/sql/SqlFunction.html" title="class in org.apache.calcite.sql">SqlFunction</a> function)</code> |
| <div class="block">Type coercion for user defined functions(UDFs).</div> |
| </td> |
| </tr> |
| </table> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.org.apache.calcite.sql.validate.implicit.AbstractTypeCoercion"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class org.apache.calcite.sql.validate.implicit.<a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html" title="class in org.apache.calcite.sql.validate.implicit">AbstractTypeCoercion</a></h3> |
| <code><a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#coerceColumnType-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlNodeList-int-org.apache.calcite.rel.type.RelDataType-">coerceColumnType</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#coerceOperandsType-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlCall-org.apache.calcite.rel.type.RelDataType-">coerceOperandsType</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#coerceOperandType-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlCall-int-org.apache.calcite.rel.type.RelDataType-">coerceOperandType</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#commonTypeForBinaryComparison-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">commonTypeForBinaryComparison</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#getTightestCommonType-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">getTightestCommonType</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#getWiderTypeFor-java.util.List-boolean-">getWiderTypeFor</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#getWiderTypeForDecimal-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-">getWiderTypeForDecimal</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#getWiderTypeForTwo-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-boolean-">getWiderTypeForTwo</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#implicitCast-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.type.SqlTypeFamily-">implicitCast</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#needToCast-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlNode-org.apache.calcite.rel.type.RelDataType-">needToCast</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#updateInferredColumnType-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlNode-int-org.apache.calcite.rel.type.RelDataType-">updateInferredColumnType</a>, <a href="../../../../../../org/apache/calcite/sql/validate/implicit/AbstractTypeCoercion.html#updateInferredType-org.apache.calcite.sql.SqlNode-org.apache.calcite.rel.type.RelDataType-">updateInferredType</a></code></li> |
| </ul> |
| <ul class="blockList"> |
| <li class="blockList"><a name="methods.inherited.from.class.java.lang.Object"> |
| <!-- --> |
| </a> |
| <h3>Methods inherited from class java.lang.<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></h3> |
| <code><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#clone--" title="class or interface in java.lang">clone</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#equals-java.lang.Object-" title="class or interface in java.lang">equals</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#finalize--" title="class or interface in java.lang">finalize</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#getClass--" title="class or interface in java.lang">getClass</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#hashCode--" title="class or interface in java.lang">hashCode</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notify--" title="class or interface in java.lang">notify</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#notifyAll--" title="class or interface in java.lang">notifyAll</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#toString--" title="class or interface in java.lang">toString</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait--" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-" title="class or interface in java.lang">wait</a>, <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true#wait-long-int-" title="class or interface in java.lang">wait</a></code></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </div> |
| <div class="details"> |
| <ul class="blockList"> |
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| <!-- ========= CONSTRUCTOR DETAIL ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.detail"> |
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| </a> |
| <h3>Constructor Detail</h3> |
| <a name="TypeCoercionImpl-org.apache.calcite.rel.type.RelDataTypeFactory-org.apache.calcite.sql.validate.SqlValidator-"> |
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| </a> |
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| <h4>TypeCoercionImpl</h4> |
| <pre>public TypeCoercionImpl(<a href="../../../../../../org/apache/calcite/rel/type/RelDataTypeFactory.html" title="interface in org.apache.calcite.rel.type">RelDataTypeFactory</a> typeFactory, |
| <a href="../../../../../../org/apache/calcite/sql/validate/SqlValidator.html" title="interface in org.apache.calcite.sql.validate">SqlValidator</a> validator)</pre> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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| <li class="blockList"><a name="method.detail"> |
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| </a> |
| <h3>Method Detail</h3> |
| <a name="rowTypeCoercion-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlNode-int-org.apache.calcite.rel.type.RelDataType-"> |
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| <h4>rowTypeCoercion</h4> |
| <pre>public boolean rowTypeCoercion(<a href="../../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../../../../../org/apache/calcite/sql/SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> query, |
| int columnIndex, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetType)</pre> |
| <div class="block">Widen a SqlNode's field type to common type, |
| mainly used for set operations like UNION, INTERSECT and EXCEPT. |
| |
| <p>Rules: |
| <pre> |
| |
| type1, type2 type3 select a, b, c from t1 |
| \ \ \ |
| type4 type5 type6 UNION |
| / / / |
| type7 type8 type9 select d, e, f from t2 |
| </pre> |
| For struct type (type1, type2, type3) union type (type4, type5, type6), |
| infer the first result column type type7 as the wider type of type1 and type4, |
| the second column type as the wider type of type2 and type5 and so on.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>scope</code> - Validator scope</dd> |
| <dd><code>query</code> - Query node to update the field type for</dd> |
| <dd><code>columnIndex</code> - Target column index</dd> |
| <dd><code>targetType</code> - Target type to cast to</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="binaryArithmeticCoercion-org.apache.calcite.sql.SqlCallBinding-"> |
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| </a> |
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| <h4>binaryArithmeticCoercion</h4> |
| <pre>public boolean binaryArithmeticCoercion(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding)</pre> |
| <div class="block">Coerces operands in binary arithmetic expressions to NUMERIC types. |
| |
| <p>For binary arithmetic operators like [+, -, *, /, %]: |
| If the operand is VARCHAR, |
| coerce it to data type of the other operand if its data type is NUMERIC; |
| If the other operand is DECIMAL, |
| coerce the STRING operand to max precision/scale DECIMAL.</div> |
| </li> |
| </ul> |
| <a name="binaryArithmeticWithStrings-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"> |
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| <h4>binaryArithmeticWithStrings</h4> |
| <pre>protected boolean binaryArithmeticWithStrings(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> left, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> right)</pre> |
| <div class="block">For NUMERIC and STRING operands, cast STRING to data type of the other operand.</div> |
| </li> |
| </ul> |
| <a name="binaryComparisonCoercion-org.apache.calcite.sql.SqlCallBinding-"> |
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| <h4>binaryComparisonCoercion</h4> |
| <pre>public boolean binaryComparisonCoercion(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding)</pre> |
| <div class="block">Coerces operands in binary comparison expressions. |
| |
| <p>Rules:</p> |
| <ul> |
| <li>For EQUALS(=) operator: 1. If operands are BOOLEAN and NUMERIC, evaluate |
| `1=true` and `0=false` all to be true; 2. If operands are datetime and string, |
| do nothing because the SqlToRelConverter already makes the type coercion;</li> |
| <li>For binary comparision [=, >, >=, <, <=]: try to find the common type, |
| i.e. "1 > '1'" will be converted to "1 > 1";</li> |
| <li>For BETWEEN operator, find the common comparison data type of all the operands, |
| the common type is deduced from left to right, i.e. for expression "A between B and C", |
| finds common comparison type D between A and B |
| then common comparison type E between D and C as the final common type.</li> |
| </ul></div> |
| </li> |
| </ul> |
| <a name="commonTypeForComparison-java.util.List-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>commonTypeForComparison</h4> |
| <pre>protected <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> commonTypeForComparison(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> dataTypes)</pre> |
| <div class="block">Finds the common type for binary comparison |
| when the size of operands <code>dataTypes</code> is more than 2. |
| If there are N(more than 2) operands, |
| finds the common type between two operands from left to right: |
| |
| <p>Rules:</p> |
| <pre> |
| type1 type2 type3 |
| | | | |
| +- type4 -+ | |
| | | |
| +--- type5 ---+ |
| </pre> |
| For operand data types (type1, type2, type3), deduce the common type type4 |
| from type1 and type2, then common type type5 from type4 and type3.</div> |
| </li> |
| </ul> |
| <a name="dateTimeStringEquality-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>dateTimeStringEquality</h4> |
| <pre>protected boolean dateTimeStringEquality(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> left, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> right)</pre> |
| <div class="block">Datetime and STRING equality: cast STRING type to datetime type, SqlToRelConverter already |
| makes the conversion but we still keep this interface overridable |
| so user can have their custom implementation.</div> |
| </li> |
| </ul> |
| <a name="booleanEquality-org.apache.calcite.sql.SqlCallBinding-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>booleanEquality</h4> |
| <pre>protected boolean booleanEquality(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> left, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> right)</pre> |
| <div class="block">Casts "BOOLEAN = NUMERIC" to "NUMERIC = NUMERIC". Expressions like 1=`expr` and |
| 0=`expr` can be simplified to `expr` and `not expr`, but this better happens |
| in <a href="../../../../../../org/apache/calcite/rex/RexSimplify.html" title="class in org.apache.calcite.rex"><code>RexSimplify</code></a>. |
| |
| <p>There are 2 cases that need type coercion here: |
| <ol> |
| <li>Case1: `boolean expr1` = 1 or `boolean expr1` = 0, replace the numeric literal with |
| `true` or `false` boolean literal.</li> |
| <li>Case2: `boolean expr1` = `numeric expr2`, replace expr1 to `1` or `0` numeric |
| literal.</li> |
| </ol> |
| For case2, wrap the operand in a cast operator, during sql-to-rel conversion |
| we would convert expression `cast(expr1 as right)` to `case when expr1 then 1 else 0.`</div> |
| </li> |
| </ul> |
| <a name="caseWhenCoercion-org.apache.calcite.sql.SqlCallBinding-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>caseWhenCoercion</h4> |
| <pre>public boolean caseWhenCoercion(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> callBinding)</pre> |
| <div class="block">CASE and COALESCE type coercion, collect all the branches types including then |
| operands and else operands to find a common type, then cast the operands to the common type |
| when needed.</div> |
| </li> |
| </ul> |
| <a name="inOperationCoercion-org.apache.calcite.sql.SqlCallBinding-"> |
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| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>inOperationCoercion</h4> |
| <pre>public boolean inOperationCoercion(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding)</pre> |
| <div class="block">STRATEGIES |
| |
| <p>With(Without) sub-query: |
| |
| <ul> |
| |
| <li>With sub-query: find the common type through comparing the left hand |
| side (LHS) expression types with corresponding right hand side (RHS) |
| expression derived from the sub-query expression's row type. Wrap the |
| fields of the LHS and RHS in CAST operators if it is needed. |
| |
| <li>Without sub-query: convert the nodes of the RHS to the common type by |
| checking all the argument types and find out the minimum common type that |
| all the arguments can be cast to. |
| |
| </ul> |
| |
| <p>How to find the common type: |
| |
| <ul> |
| |
| <li>For both struct sql types (LHS and RHS), find the common type of every |
| LHS and RHS fields pair: |
| |
| <pre> |
| (field1, field2, field3) (field4, field5, field6) |
| | | | | | | |
| +--------+---type1----------+ | | |
| | | | | |
| +-------+----type2---------+ | |
| | | |
| +-------------type3--------+ |
| </pre> |
| </li> |
| <li>For both basic sql types(LHS and RHS), |
| find the common type of LHS and RHS nodes.</li> |
| </ul></div> |
| </li> |
| </ul> |
| <a name="builtinFunctionCoercion-org.apache.calcite.sql.SqlCallBinding-java.util.List-java.util.List-"> |
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| </a> |
| <ul class="blockList"> |
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| <h4>builtinFunctionCoercion</h4> |
| <pre>public boolean builtinFunctionCoercion(<a href="../../../../../../org/apache/calcite/sql/SqlCallBinding.html" title="class in org.apache.calcite.sql">SqlCallBinding</a> binding, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a>> operandTypes, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/util/List.html?is-external=true" title="class or interface in java.util">List</a><<a href="../../../../../../org/apache/calcite/sql/type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type">SqlTypeFamily</a>> expectedFamilies)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/calcite/sql/validate/implicit/TypeCoercion.html#builtinFunctionCoercion-org.apache.calcite.sql.SqlCallBinding-java.util.List-java.util.List-">TypeCoercion</a></code></span></div> |
| <div class="block">Type coercion with inferred type from passed in arguments and the |
| <a href="../../../../../../org/apache/calcite/sql/type/SqlTypeFamily.html" title="enum in org.apache.calcite.sql.type"><code>SqlTypeFamily</code></a> defined in the checkers, e.g. the |
| <a href="../../../../../../org/apache/calcite/sql/type/FamilyOperandTypeChecker.html" title="class in org.apache.calcite.sql.type"><code>FamilyOperandTypeChecker</code></a>. |
| |
| <p>Caution that we do not cast from NUMERIC if desired type family is also |
| <a href="../../../../../../org/apache/calcite/sql/type/SqlTypeFamily.html#NUMERIC"><code>SqlTypeFamily.NUMERIC</code></a>. |
| |
| <p>If the <a href="../../../../../../org/apache/calcite/sql/type/FamilyOperandTypeChecker.html" title="class in org.apache.calcite.sql.type"><code>FamilyOperandTypeChecker</code></a>s are |
| subsumed in a |
| <a href="../../../../../../org/apache/calcite/sql/type/CompositeOperandTypeChecker.html" title="class in org.apache.calcite.sql.type"><code>CompositeOperandTypeChecker</code></a>, check them |
| based on their combination order. i.e. If we allow a NUMERIC_NUMERIC OR |
| STRING_NUMERIC family combination and are with arguments (op1: VARCHAR(20), op2: BOOLEAN), |
| try to coerce both op1 and op2 to NUMERIC if the type coercion rules allow it, |
| or else try to coerce op2 to NUMERIC and keep op1 the type as it is. |
| |
| <p>This is also very interrelated to the composition predicate for the |
| checkers: if the predicate is AND, we would fail fast if the first family |
| type coercion fails.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>binding</code> - Call binding</dd> |
| <dd><code>operandTypes</code> - Types of the operands passed in</dd> |
| <dd><code>expectedFamilies</code> - Expected SqlTypeFamily list by user specified</dd> |
| </dl> |
| </li> |
| </ul> |
| <a name="userDefinedFunctionCoercion-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.sql.SqlCall-org.apache.calcite.sql.SqlFunction-"> |
| <!-- --> |
| </a> |
| <ul class="blockList"> |
| <li class="blockList"> |
| <h4>userDefinedFunctionCoercion</h4> |
| <pre>public boolean userDefinedFunctionCoercion(<a href="../../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../../../../../org/apache/calcite/sql/SqlCall.html" title="class in org.apache.calcite.sql">SqlCall</a> call, |
| <a href="../../../../../../org/apache/calcite/sql/SqlFunction.html" title="class in org.apache.calcite.sql">SqlFunction</a> function)</pre> |
| <div class="block">Type coercion for user defined functions(UDFs).</div> |
| </li> |
| </ul> |
| <a name="querySourceCoercion-org.apache.calcite.sql.validate.SqlValidatorScope-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.rel.type.RelDataType-org.apache.calcite.sql.SqlNode-"> |
| <!-- --> |
| </a> |
| <ul class="blockListLast"> |
| <li class="blockList"> |
| <h4>querySourceCoercion</h4> |
| <pre>public boolean querySourceCoercion(<a href="../../../../../../org/apache/calcite/sql/validate/SqlValidatorScope.html" title="interface in org.apache.calcite.sql.validate">SqlValidatorScope</a> scope, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> sourceRowType, |
| <a href="../../../../../../org/apache/calcite/rel/type/RelDataType.html" title="interface in org.apache.calcite.rel.type">RelDataType</a> targetRowType, |
| <a href="../../../../../../org/apache/calcite/sql/SqlNode.html" title="class in org.apache.calcite.sql">SqlNode</a> query)</pre> |
| <div class="block"><span class="descfrmTypeLabel">Description copied from interface: <code><a href="../../../../../../org/apache/calcite/sql/validate/implicit/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-">TypeCoercion</a></code></span></div> |
| <div class="block">Coerces the source row expression to target type in an INSERT or UPDATE query. |
| |
| <p>If the source and target fields in the same ordinal do not equal sans nullability, |
| try to coerce the source field to target field type.</div> |
| <dl> |
| <dt><span class="paramLabel">Parameters:</span></dt> |
| <dd><code>scope</code> - Source scope</dd> |
| <dd><code>sourceRowType</code> - Source row type</dd> |
| <dd><code>targetRowType</code> - Target row type</dd> |
| <dd><code>query</code> - The query, either an INSERT or UPDATE</dd> |
| </dl> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
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