| /* |
| * 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.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.base.Preconditions; |
| |
| import org.checkerframework.checker.nullness.qual.Nullable; |
| |
| /** |
| * Definition of the <code>BIT_AND</code> and <code>BIT_OR</code> aggregate functions, |
| * returning the bitwise AND/OR of all non-null input values, or null if none. |
| * |
| * <p>INTEGER and BINARY types are supported: |
| * tinyint, smallint, int, bigint, binary, varbinary |
| */ |
| public class SqlBitOpAggFunction extends SqlAggFunction { |
| |
| //~ Constructors ----------------------------------------------------------- |
| |
| /** Creates a SqlBitOpAggFunction. */ |
| public SqlBitOpAggFunction(SqlKind kind) { |
| super(kind.name(), |
| null, |
| kind, |
| ReturnTypes.ARG0_NULLABLE_IF_EMPTY, |
| null, |
| OperandTypes.INTEGER.or(OperandTypes.BINARY), |
| SqlFunctionCategory.NUMERIC, |
| false, |
| false, |
| Optionality.FORBIDDEN); |
| Preconditions.checkArgument(kind == SqlKind.BIT_AND |
| || kind == SqlKind.BIT_OR |
| || kind == SqlKind.BIT_XOR); |
| } |
| |
| @Override public <T extends Object> @Nullable T unwrap(Class<T> clazz) { |
| if (clazz.isInstance(SqlSplittableAggFunction.SelfSplitter.INSTANCE)) { |
| return clazz.cast(SqlSplittableAggFunction.SelfSplitter.INSTANCE); |
| } |
| return super.unwrap(clazz); |
| } |
| |
| @Override public Optionality getDistinctOptionality() { |
| final Optionality optionality; |
| |
| switch (kind) { |
| case BIT_AND: |
| case BIT_OR: |
| optionality = Optionality.IGNORED; |
| break; |
| default: |
| optionality = Optionality.OPTIONAL; |
| break; |
| } |
| return optionality; |
| } |
| } |