| /* |
| * 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.calcite.sql.fun; |
| |
| import org.apache.calcite.rel.type.RelDataType; |
| import org.apache.calcite.rel.type.RelDataTypeFactory; |
| import org.apache.calcite.sql.SqlAggFunction; |
| import org.apache.calcite.sql.SqlFunctionCategory; |
| import org.apache.calcite.sql.SqlKind; |
| import org.apache.calcite.sql.SqlSplittableAggFunction; |
| import org.apache.calcite.sql.type.OperandTypes; |
| import org.apache.calcite.sql.type.ReturnTypes; |
| import org.apache.calcite.util.Optionality; |
| |
| import com.google.common.collect.ImmutableList; |
| |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| import java.util.List; |
| |
| /** |
| * <code>Sum</code> is an aggregator which returns the sum of the values which |
| * go into it. It has precisely one argument of numeric type (<code>int</code>, |
| * <code>long</code>, <code>float</code>, <code>double</code>), and the result |
| * is the same type. |
| */ |
| public class SqlSumAggFunction extends SqlAggFunction { |
| |
| //~ Instance fields -------------------------------------------------------- |
| |
| @Deprecated // to be removed before 2.0 |
| private final RelDataType type; |
| |
| //~ Constructors ----------------------------------------------------------- |
| |
| public SqlSumAggFunction(RelDataType type) { |
| super( |
| "SUM", |
| null, |
| SqlKind.SUM, |
| ReturnTypes.AGG_SUM, |
| null, |
| OperandTypes.NUMERIC, |
| SqlFunctionCategory.NUMERIC, |
| false, |
| false, |
| Optionality.FORBIDDEN); |
| this.type = type; |
| } |
| |
| //~ Methods ---------------------------------------------------------------- |
| |
| @SuppressWarnings("deprecation") |
| @Override public List<RelDataType> getParameterTypes(RelDataTypeFactory typeFactory) { |
| return ImmutableList.of(type); |
| } |
| |
| @Deprecated // to be removed before 2.0 |
| public RelDataType getType() { |
| return type; |
| } |
| |
| @SuppressWarnings("deprecation") |
| @Override public RelDataType getReturnType(RelDataTypeFactory typeFactory) { |
| return type; |
| } |
| |
| @Override public <T extends Object> @Nullable T unwrap(Class<T> clazz) { |
| if (clazz.isInstance(SqlSplittableAggFunction.SumSplitter.INSTANCE)) { |
| return clazz.cast(SqlSplittableAggFunction.SumSplitter.INSTANCE); |
| } |
| return super.unwrap(clazz); |
| } |
| |
| @Override public SqlAggFunction getRollup() { |
| return this; |
| } |
| } |