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[FLINK-13225][table-planner-blink] Fix type inference for hive udf
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80 changes: 80 additions & 0 deletions
80
...blink/src/main/java/org/apache/flink/table/planner/functions/utils/HiveFunctionUtils.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
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| package org.apache.flink.table.planner.functions.utils; | ||
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| import org.apache.flink.table.planner.calcite.FlinkTypeFactory; | ||
| import org.apache.flink.table.types.DataType; | ||
| import org.apache.flink.table.types.logical.LogicalType; | ||
| import org.apache.flink.table.types.utils.TypeConversions; | ||
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| import org.apache.calcite.rel.type.RelDataType; | ||
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| import java.io.Serializable; | ||
| import java.lang.reflect.InvocationTargetException; | ||
| import java.lang.reflect.Method; | ||
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| import static org.apache.flink.table.runtime.types.LogicalTypeDataTypeConverter.fromDataTypeToLogicalType; | ||
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| /** | ||
| * Hack utils for hive function. | ||
| */ | ||
| public class HiveFunctionUtils { | ||
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| public static boolean isHiveFunc(Object function) { | ||
| try { | ||
| getSetArgsMethod(function); | ||
| return true; | ||
| } catch (NoSuchMethodException e) { | ||
| return false; | ||
| } | ||
| } | ||
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| private static Method getSetArgsMethod(Object function) throws NoSuchMethodException { | ||
| return function.getClass().getMethod( | ||
| "setArgumentTypesAndConstants", Object[].class, DataType[].class); | ||
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| } | ||
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| static Serializable invokeSetArgs( | ||
| Serializable function, Object[] constantArguments, LogicalType[] argTypes) { | ||
| try { | ||
| // See hive HiveFunction | ||
| Method method = getSetArgsMethod(function); | ||
| method.invoke(function, constantArguments, TypeConversions.fromLogicalToDataType(argTypes)); | ||
| return function; | ||
| } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
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| static RelDataType invokeGetResultType( | ||
| Object function, Object[] constantArguments, LogicalType[] argTypes, | ||
| FlinkTypeFactory typeFactory) { | ||
| try { | ||
| // See hive HiveFunction | ||
| Method method = function.getClass() | ||
| .getMethod("getHiveResultType", Object[].class, DataType[].class); | ||
| DataType resultType = (DataType) method.invoke( | ||
| function, constantArguments, TypeConversions.fromLogicalToDataType(argTypes)); | ||
| return typeFactory.createFieldTypeFromLogicalType(fromDataTypeToLogicalType(resultType)); | ||
| } catch (NoSuchMethodException | IllegalAccessException | InvocationTargetException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
| } |
85 changes: 85 additions & 0 deletions
85
...k/src/main/java/org/apache/flink/table/planner/functions/utils/HiveScalarSqlFunction.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,85 @@ | ||
| /* | ||
| * Licensed to the Apache Software Foundation (ASF) under one | ||
| * or more contributor license agreements. See the NOTICE file | ||
| * distributed with this work for additional information | ||
| * regarding copyright ownership. The ASF licenses this file | ||
| * to you under the Apache License, Version 2.0 (the | ||
| * "License"); you may not use this file except in compliance | ||
| * with the License. You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
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| package org.apache.flink.table.planner.functions.utils; | ||
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| import org.apache.flink.table.functions.ScalarFunction; | ||
| import org.apache.flink.table.planner.calcite.FlinkTypeFactory; | ||
| import org.apache.flink.table.types.logical.LogicalType; | ||
| import org.apache.flink.util.InstantiationUtil; | ||
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| import org.apache.calcite.rel.type.RelDataType; | ||
| import org.apache.calcite.sql.type.SqlReturnTypeInference; | ||
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| import java.io.IOException; | ||
| import java.util.List; | ||
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| import scala.Some; | ||
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| import static org.apache.flink.table.planner.functions.utils.HiveFunctionUtils.invokeGetResultType; | ||
| import static org.apache.flink.table.planner.functions.utils.HiveFunctionUtils.invokeSetArgs; | ||
| import static org.apache.flink.table.runtime.types.ClassLogicalTypeConverter.getDefaultExternalClassForType; | ||
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| /** | ||
| * Hive {@link ScalarSqlFunction}. | ||
| * Override getFunction to clone function and invoke {@code HiveScalarFunction#setArgumentTypesAndConstants}. | ||
| * Override SqlReturnTypeInference to invoke {@code HiveScalarFunction#getHiveResultType} instead of | ||
| * {@code HiveScalarFunction#getResultType(Class[])}. | ||
| * | ||
| * @deprecated TODO hack code, its logical should be integrated to ScalarSqlFunction | ||
| */ | ||
| @Deprecated | ||
| public class HiveScalarSqlFunction extends ScalarSqlFunction { | ||
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| private final ScalarFunction function; | ||
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| public HiveScalarSqlFunction( | ||
| String name, String displayName, | ||
| ScalarFunction function, FlinkTypeFactory typeFactory) { | ||
| super(name, displayName, function, typeFactory, new Some<>(createReturnTypeInference(function, typeFactory))); | ||
| this.function = function; | ||
| } | ||
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| @Override | ||
| public ScalarFunction makeFunction(Object[] constantArguments, LogicalType[] argTypes) { | ||
| ScalarFunction clone; | ||
| try { | ||
| clone = InstantiationUtil.clone(function); | ||
| } catch (IOException | ClassNotFoundException e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| return (ScalarFunction) invokeSetArgs(clone, constantArguments, argTypes); | ||
| } | ||
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| private static SqlReturnTypeInference createReturnTypeInference( | ||
| ScalarFunction function, FlinkTypeFactory typeFactory) { | ||
| return opBinding -> { | ||
| List<RelDataType> sqlTypes = opBinding.collectOperandTypes(); | ||
| LogicalType[] parameters = UserDefinedFunctionUtils.getOperandTypeArray(opBinding); | ||
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| Object[] constantArguments = new Object[sqlTypes.size()]; | ||
| for (int i = 0; i < sqlTypes.size(); i++) { | ||
| if (!opBinding.isOperandNull(i, false) && opBinding.isOperandLiteral(i, false)) { | ||
| constantArguments[i] = opBinding.getOperandLiteralValue( | ||
| i, getDefaultExternalClassForType(parameters[i])); | ||
| } | ||
| } | ||
| return invokeGetResultType(function, constantArguments, parameters, typeFactory); | ||
| }; | ||
| } | ||
| } |
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