| /* |
| * 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. |
| */ |
| package org.apache.drill.exec.planner.sql; |
| |
| import org.apache.calcite.rel.type.RelDataType; |
| import org.apache.calcite.sql.SqlAggFunction; |
| import org.apache.calcite.sql.SqlCall; |
| import org.apache.calcite.sql.SqlCallBinding; |
| import org.apache.calcite.sql.SqlOperator; |
| import org.apache.calcite.sql.SqlOperatorBinding; |
| import org.apache.calcite.sql.SqlSyntax; |
| import org.apache.calcite.sql.fun.SqlSumEmptyIsZeroAggFunction; |
| import org.apache.calcite.sql.type.SqlReturnTypeInference; |
| import org.apache.calcite.sql.validate.SqlMonotonicity; |
| import org.apache.calcite.sql.validate.SqlValidator; |
| import org.apache.calcite.sql.validate.SqlValidatorScope; |
| import org.apache.calcite.util.Litmus; |
| import org.apache.calcite.util.Util; |
| import org.apache.drill.exec.expr.fn.DrillFuncHolder; |
| |
| import java.util.List; |
| |
| /** |
| * This class serves as a wrapper class for {@link SqlSumEmptyIsZeroAggFunction} |
| * with the same goal as {@link DrillCalciteSqlAggFunctionWrapper} |
| * but extends {@link SqlSumEmptyIsZeroAggFunction} to allow using |
| * additional Calcite functionality designated for {@link SqlSumEmptyIsZeroAggFunction}. |
| */ |
| public class DrillCalciteSqlSumEmptyIsZeroAggFunctionWrapper |
| extends SqlSumEmptyIsZeroAggFunction implements DrillCalciteSqlWrapper { |
| |
| private final SqlAggFunction operator; |
| |
| private final SqlReturnTypeInference sqlReturnTypeInference; |
| |
| private DrillCalciteSqlSumEmptyIsZeroAggFunctionWrapper( |
| SqlSumEmptyIsZeroAggFunction sqlAggFunction, |
| SqlReturnTypeInference sqlReturnTypeInference) { |
| this.sqlReturnTypeInference = sqlReturnTypeInference; |
| this.operator = sqlAggFunction; |
| } |
| |
| public DrillCalciteSqlSumEmptyIsZeroAggFunctionWrapper( |
| SqlSumEmptyIsZeroAggFunction sqlAggFunction, |
| List<DrillFuncHolder> functions) { |
| this(sqlAggFunction, |
| TypeInferenceUtils.getDrillSqlReturnTypeInference( |
| sqlAggFunction.getName(), |
| functions)); |
| } |
| |
| public DrillCalciteSqlSumEmptyIsZeroAggFunctionWrapper( |
| SqlSumEmptyIsZeroAggFunction sqlAggFunction, |
| RelDataType relDataType) { |
| this(sqlAggFunction, opBinding -> relDataType); |
| } |
| |
| @Override |
| public SqlOperator getOperator() { |
| return operator; |
| } |
| |
| @Override |
| public SqlReturnTypeInference getReturnTypeInference() { |
| return this.sqlReturnTypeInference; |
| } |
| |
| @Override |
| public RelDataType inferReturnType(SqlOperatorBinding opBinding) { |
| if (this.sqlReturnTypeInference != null) { |
| RelDataType returnType = this.sqlReturnTypeInference.inferReturnType(opBinding); |
| if (returnType == null) { |
| throw new IllegalArgumentException(String.format( |
| "Cannot infer return type for %s; operand types: %s", |
| opBinding.getOperator(), opBinding.collectOperandTypes())); |
| } else { |
| return returnType; |
| } |
| } else { |
| throw Util.needToImplement(this); |
| } |
| } |
| |
| @Override |
| public boolean validRexOperands(int count, Litmus litmus) { |
| return true; |
| } |
| |
| @Override |
| public String getAllowedSignatures(String opNameToUse) { |
| return operator.getAllowedSignatures(opNameToUse); |
| } |
| |
| @Override |
| public boolean isAggregator() { |
| return operator.isAggregator(); |
| } |
| |
| @Override |
| public boolean allowsFraming() { |
| return operator.allowsFraming(); |
| } |
| |
| @Override |
| public SqlMonotonicity getMonotonicity(SqlOperatorBinding call) { |
| return operator.getMonotonicity(call); |
| } |
| |
| @Override |
| public boolean isDeterministic() { |
| return operator.isDeterministic(); |
| } |
| |
| @Override |
| public boolean isDynamicFunction() { |
| return operator.isDynamicFunction(); |
| } |
| |
| @Override |
| public boolean requiresDecimalExpansion() { |
| return operator.requiresDecimalExpansion(); |
| } |
| |
| @Override |
| public boolean argumentMustBeScalar(int ordinal) { |
| return operator.argumentMustBeScalar(ordinal); |
| } |
| |
| @Override |
| public boolean checkOperandTypes( |
| SqlCallBinding callBinding, |
| boolean throwOnFailure) { |
| return true; |
| } |
| |
| @Override |
| public SqlSyntax getSyntax() { |
| return operator.getSyntax(); |
| } |
| |
| @Override |
| public List<String> getParamNames() { |
| return operator.getParamNames(); |
| } |
| |
| @Override |
| public String getSignatureTemplate(final int operandsCount) { |
| return operator.getSignatureTemplate(operandsCount); |
| } |
| |
| @Override |
| public RelDataType deriveType( |
| SqlValidator validator, |
| SqlValidatorScope scope, |
| SqlCall call) { |
| return operator.deriveType(validator, scope, call); |
| } |
| } |