io.trino.operator.scalar.CombineHashFunction Maven / Gradle / Ivy
/*
* Licensed 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 io.trino.operator.scalar;
import io.trino.spi.function.ScalarFunction;
import io.trino.spi.function.SqlType;
import io.trino.spi.type.StandardTypes;
public final class CombineHashFunction
{
private CombineHashFunction() {}
@ScalarFunction(value = "combine_hash", hidden = true)
@SqlType(StandardTypes.BIGINT)
public static long getHash(@SqlType(StandardTypes.BIGINT) long previousHashValue, @SqlType(StandardTypes.BIGINT) long value)
{
return (31 * previousHashValue + value);
}
}