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