com.blazebit.persistence.impl.function.datediff.microsecond.DB2MicrosecondDiffFunction Maven / Gradle / Ivy
/*
* Copyright 2014 - 2020 Blazebit.
*
* 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 com.blazebit.persistence.impl.function.datediff.microsecond;
/**
* @author Jan-Willem Gmelig Meyling
* @since 1.4.0
*/
public class DB2MicrosecondDiffFunction extends MicrosecondDiffFunction {
public DB2MicrosecondDiffFunction() {
// NOTE: we need lateral, otherwise the alias will be lost in the subquery
super("(select cast((days(t2) - days(t1)) as bigint) * (" + (24L * 60L * 60L * 1000000L) + ") + cast((midnight_seconds(t2) - midnight_seconds(t1)) as bigint) * 1000000 + (microsecond(t2) - microsecond(t1)) from lateral(values (cast(?1 as timestamp), cast(?2 as timestamp))) as temp(t1,t2))");
}
}