| /* |
| * 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.SqlKind; |
| import org.apache.calcite.sql.type.OperandTypes; |
| |
| import static com.google.common.base.Preconditions.checkArgument; |
| |
| /** |
| * Definition of the SQL <code>REGR_COUNT</code> aggregation function. |
| * |
| * <p><code>REGR_COUNT</code> is an aggregator which returns the number of rows which |
| * have gone into it and both arguments are not <code>null</code>. |
| */ |
| public class SqlRegrCountAggFunction extends SqlCountAggFunction { |
| public SqlRegrCountAggFunction(SqlKind kind) { |
| super("REGR_COUNT", OperandTypes.NUMERIC_NUMERIC); |
| checkArgument(SqlKind.REGR_COUNT == kind, "unsupported sql kind: " + kind); |
| } |
| } |