io.questdb.griffin.engine.functions.date.IntervalFunctionFactory Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of questdb Show documentation
QuestDB is high performance SQL time series database
There is a newer version: 8.2.1
/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2024 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
 *  limitations under the License.
 *
 ******************************************************************************/

package io.questdb.griffin.engine.functions.date;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.CairoException;
import io.questdb.cairo.sql.Function;
import io.questdb.cairo.sql.Record;
import io.questdb.cairo.sql.SymbolTableSource;
import io.questdb.griffin.FunctionFactory;
import io.questdb.griffin.SqlException;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.BinaryFunction;
import io.questdb.griffin.engine.functions.IntervalFunction;
import io.questdb.griffin.engine.functions.constants.IntervalConstant;
import io.questdb.std.IntList;
import io.questdb.std.Interval;
import io.questdb.std.Numbers;
import io.questdb.std.ObjList;
import org.jetbrains.annotations.NotNull;


public class IntervalFunctionFactory implements FunctionFactory {

    @Override
    public String getSignature() {
        return "interval(NN)";
    }

    @Override
    public Function newInstance(
            int position,
            ObjList args,
            IntList argPositions,
            CairoConfiguration configuration,
            SqlExecutionContext sqlExecutionContext
    ) throws SqlException {
        final Function loFunc = args.getQuick(0);
        final Function hiFunc = args.getQuick(1);
        if (loFunc.isConstant() && hiFunc.isConstant()) {
            long lo = loFunc.getTimestamp(null);
            long hi = hiFunc.getTimestamp(null);
            if (lo == Numbers.LONG_NULL || hi == Numbers.LONG_NULL) {
                return IntervalConstant.NULL;
            }
            if (lo > hi) {
                throw SqlException.position(position).put("invalid interval boundaries");
            }
            return IntervalConstant.newInstance(lo, hi);
        }
        if ((loFunc.isConstant() || loFunc.isRuntimeConstant())
                || (hiFunc.isConstant() || hiFunc.isRuntimeConstant())) {
            return new RuntimeConstFunc(position, loFunc, hiFunc);
        }
        return new Func(loFunc, hiFunc);
    }

    private static class Func extends IntervalFunction implements BinaryFunction {
        private final Function hiFunc;
        private final Interval interval = new Interval();
        private final Function loFunc;

        public Func(Function loFunc, Function hiFunc) {
            this.loFunc = loFunc;
            this.hiFunc = hiFunc;
        }

        @Override
        public @NotNull Interval getInterval(Record rec) {
            long l = loFunc.getTimestamp(rec);
            long r = hiFunc.getTimestamp(rec);
            if (l == Numbers.LONG_NULL || r == Numbers.LONG_NULL) {
                return Interval.NULL;
            }
            if (l > r) {
                throw CairoException.nonCritical().put("invalid interval boundaries");
            }
            return interval.of(l, r);
        }

        @Override
        public Function getLeft() {
            return loFunc;
        }

        @Override
        public String getName() {
            return "interval";
        }

        @Override
        public Function getRight() {
            return hiFunc;
        }
    }

    private static class RuntimeConstFunc extends IntervalFunction implements BinaryFunction {
        private final Function hiFunc;
        private final Interval interval = new Interval();
        private final Function loFunc;
        private final int position;

        public RuntimeConstFunc(int position, Function loFunc, Function hiFunc) {
            this.position = position;
            this.loFunc = loFunc;
            this.hiFunc = hiFunc;
        }

        @Override
        public @NotNull Interval getInterval(Record rec) {
            return interval;
        }

        @Override
        public Function getLeft() {
            return loFunc;
        }

        @Override
        public String getName() {
            return "interval";
        }

        @Override
        public Function getRight() {
            return hiFunc;
        }

        @Override
        public void init(SymbolTableSource symbolTableSource, SqlExecutionContext executionContext) throws SqlException {
            BinaryFunction.super.init(symbolTableSource, executionContext);
            long lo = loFunc.getTimestamp(null);
            long hi = hiFunc.getTimestamp(null);
            if (lo == Numbers.LONG_NULL || hi == Numbers.LONG_NULL) {
                interval.of(Interval.NULL.getLo(), Interval.NULL.getHi());
            }
            if (lo > hi) {
                throw SqlException.position(position).put("invalid interval boundaries");
            }
            interval.of(lo, hi);
        }

        @Override
        public boolean isConstant() {
            return false;
        }

        @Override
        public boolean isRuntimeConstant() {
            return true;
        }
    }
}