io.questdb.griffin.engine.functions.eq.EqTimestampStrFunctionFactory Maven / Gradle / Ivy

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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
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 *  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
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 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.questdb.griffin.engine.functions.eq;

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.SqlException;
import io.questdb.griffin.SqlExecutionContext;
import io.questdb.griffin.engine.functions.BinaryFunction;
import io.questdb.griffin.engine.functions.NegatableBooleanFunction;
import io.questdb.griffin.engine.functions.UnaryFunction;
import io.questdb.griffin.model.IntervalOperation;
import io.questdb.std.LongList;
import io.questdb.std.ObjList;

import static io.questdb.griffin.model.IntervalUtils.*;

public class EqTimestampStrFunctionFactory implements FunctionFactory {

    @Override
    public String getSignature() {
        return "=(NS)";
    }

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

    @Override
    public Function newInstance(ObjList args, int position, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) throws SqlException {
        Function rightFn = args.getQuick(1);
        if (rightFn.isConstant()) {
            return new EqTimestampStrConstantFunction(position, args.getQuick(0), rightFn.getStr(null), rightFn.getPosition());
        }
        return new EqTimestampStrFunction(position, args.getQuick(0), rightFn);
    }

    private static class EqTimestampStrConstantFunction extends NegatableBooleanFunction implements UnaryFunction {
        private final Function left;
        private final LongList intervals = new LongList();

        public EqTimestampStrConstantFunction(int position, Function left, CharSequence right, int rightPosition) throws SqlException {
            super(position);
            this.left = left;
            parseAndApplyIntervalEx(right, intervals, rightPosition);
        }

        @Override
        public boolean getBool(Record rec) {
            return negated != isInIntervals(intervals, left.getTimestamp(rec));
        }

        @Override
        public Function getArg() {
            return left;
        }
    }

    private static class EqTimestampStrFunction extends NegatableBooleanFunction implements BinaryFunction {
        private final Function left;
        private final Function right;
        private final LongList intervals = new LongList();

        public EqTimestampStrFunction(int position, Function left, Function right) {
            super(position);
            this.left = left;
            this.right = right;
        }

        @Override
        public boolean getBool(Record rec) {
            CharSequence timestampAsString = right.getStr(rec);
            intervals.clear();
            try {
                parseAndApplyIntervalEx(timestampAsString, intervals, right.getPosition());
            } catch (SqlException e) {
                return false;
            }
            return negated != isInIntervals(intervals, left.getTimestamp(rec));
        }

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

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

    private static void parseAndApplyIntervalEx(CharSequence seq, LongList out, int position) throws SqlException {
        parseIntervalEx(seq, 0, seq.length(), position, out, IntervalOperation.INTERSECT);
        applyLastEncodedIntervalEx(out);
    }
}