io.questdb.griffin.engine.functions.date.MillisOfSecondFunctionFactory Maven / Gradle / Ivy
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* Copyright (c) 2014-2019 Appsicle
* Copyright (c) 2019-2020 QuestDB
*
* 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
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package io.questdb.griffin.engine.functions.date;
import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.IntFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.std.Numbers;
import io.questdb.std.ObjList;
import io.questdb.std.datetime.microtime.Timestamps;
public class MillisOfSecondFunctionFactory implements FunctionFactory {
@Override
public String getSignature() {
return "millis(N)";
}
@Override
public Function newInstance(ObjList args, int position, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) {
final Function arg = args.getQuick(0);
return new Func(position, arg);
}
private static final class Func extends IntFunction implements UnaryFunction {
private final Function arg;
public Func(int position, Function arg) {
super(position);
this.arg = arg;
}
@Override
public Function getArg() {
return arg;
}
@Override
public int getInt(Record rec) {
final long value = arg.getTimestamp(rec);
if (value == Numbers.LONG_NaN) {
return Numbers.INT_NaN;
}
return Timestamps.getMillisOfSecond(value);
}
}
}