io.questdb.griffin.engine.functions.cast.CastGeoHashToVarcharFunctionFactory 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
The newest version!
/*******************************************************************************
 *     ___                  _   ____  ____
 *    / _ \ _   _  ___  ___| |_|  _ \| __ )
 *   | | | | | | |/ _ \/ __| __| | | |  _ \
 *   | |_| | |_| |  __/\__ \ |_| |_| | |_) |
 *    \__\_\\__,_|\___||___/\__|____/|____/
 *
 *  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.cast;

import io.questdb.cairo.CairoConfiguration;
import io.questdb.cairo.GeoHashes;
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.bool.WithinGeohashFunctionFactory;
import io.questdb.griffin.engine.functions.constants.VarcharConstant;
import io.questdb.std.Chars;
import io.questdb.std.IntList;
import io.questdb.std.Misc;
import io.questdb.std.ObjList;
import io.questdb.std.str.StringSink;
import io.questdb.std.str.Utf8Sequence;
import io.questdb.std.str.Utf8StringSink;

import java.util.Objects;

public class CastGeoHashToVarcharFunctionFactory implements FunctionFactory {
    @Override
    public String getSignature() {
        return "cast(Gø)";
    }

    @Override
    public Function newInstance(int position, ObjList args, IntList argPositions, CairoConfiguration configuration, SqlExecutionContext sqlExecutionContext) {
        Function geoHashFunc = args.getQuick(0);
        if (geoHashFunc.isConstant()) {
            int geoHashFuncType = geoHashFunc.getType();
            final StringSink sink = Misc.getThreadLocalSink();
            long hash = WithinGeohashFunctionFactory.getGeoHashAsLong(null, geoHashFunc, geoHashFuncType);
            GeoHashes.appendNoQuotes(hash, GeoHashes.getBitFlags(geoHashFuncType), sink);
            return new VarcharConstant(Chars.toString(sink));
        }
        return new Func(args.getQuick(0));
    }

    public static class Func extends AbstractCastToVarcharFunction {
        private final int argType;
        private final Utf8StringSink sinkA = new Utf8StringSink();
        private final Utf8StringSink sinkB = new Utf8StringSink();

        public Func(Function arg) {
            super(arg);
            argType = arg.getType();
        }

        public void getVarchar(Record rec, Utf8StringSink sink) {
            long hash = WithinGeohashFunctionFactory.getGeoHashAsLong(rec, arg, argType);
            sink.clear();
            if (hash != GeoHashes.NULL) {
                GeoHashes.appendNoQuotes(hash, GeoHashes.getBitFlags(argType), sink);
            }
        }

        @Override
        public Utf8Sequence getVarcharA(Record rec) {
            getVarchar(rec, sinkA);
            return sinkA;
        }

        @Override
        public Utf8Sequence getVarcharB(Record rec) {
            getVarchar(rec, sinkB);
            return sinkB;
        }

        @Override
        public int getVarcharSize(Record rec) {
            return Objects.requireNonNull(getVarcharA(rec)).size();
        }
    }
}