Examples with MapValue io.questdb.cairo.map.MapValue used on opensource projects

Example 16 with MapValue

use of io.questdb.cairo.map.MapValue in project questdb by bluestreak01.

the class HashJoinLightRecordCursorFactory method buildMapOfSlaveRecords.

private void buildMapOfSlaveRecords(RecordCursor slaveCursor, SqlExecutionInterruptor interruptor) {
    slaveChain.clear();
    joinKeyMap.clear();
    final Record record = slaveCursor.getRecord();
    while (slaveCursor.hasNext()) {
        interruptor.checkInterrupted();
        MapKey key = joinKeyMap.withKey();
        key.put(record, slaveKeySink);
        MapValue value = key.createValue();
        if (value.isNew()) {
            final long offset = slaveChain.put(record.getRowId(), -1);
            value.putLong(0, offset);
            value.putLong(1, offset);
        } else {
            value.putLong(1, slaveChain.put(record.getRowId(), value.getLong(1)));
        }
    }
}

Example 17 with MapValue

use of io.questdb.cairo.map.MapValue in project questdb by bluestreak01.

the class HashOuterJoinLightRecordCursorFactory method buildMapOfSlaveRecords.

private void buildMapOfSlaveRecords(RecordCursor slaveCursor, SqlExecutionInterruptor interruptor) {
    slaveChain.clear();
    joinKeyMap.clear();
    final Record record = slaveCursor.getRecord();
    while (slaveCursor.hasNext()) {
        interruptor.checkInterrupted();
        MapKey key = joinKeyMap.withKey();
        key.put(record, slaveKeySink);
        MapValue value = key.createValue();
        if (value.isNew()) {
            final long offset = slaveChain.put(record.getRowId(), -1);
            value.putLong(0, offset);
            value.putLong(1, offset);
        } else {
            value.putLong(1, slaveChain.put(record.getRowId(), value.getLong(1)));
        }
    }
}

Example 18 with MapValue

use of io.questdb.cairo.map.MapValue in project questdb by bluestreak01.

the class HaversineDistDegreeGroupByFunction method interpolateBoundary.

@Override
public void interpolateBoundary(MapValue value1, MapValue value2, long boundaryTimestamp, boolean isEndOfBoundary) {
    double distance = calculateHaversineDistance(value1, value2);
    // interpolate
    long ts1 = getLastTimestamp(value1);
    long ts2 = getFirstTimestamp(value2);
    long boundaryLength = isEndOfBoundary ? boundaryTimestamp - ts1 : ts2 - boundaryTimestamp;
    double interpolatedBoundaryDistance = (boundaryLength * distance) / (ts2 - ts1);
    // save
    MapValue result = isEndOfBoundary ? value1 : value2;
    saveDistance(interpolatedBoundaryDistance, result, getDistance(result));
}

Example 19 with MapValue

use of io.questdb.cairo.map.MapValue in project questdb by bluestreak01.

the class AbstractSampleByFillValueRecordCursor method toTop.

@Override
public void toTop() {
    super.toTop();
    if (base.hasNext()) {
        baseRecord = base.getRecord();
        int n = groupByFunctions.size();
        RecordCursor mapCursor = map.getCursor();
        MapRecord mapRecord = map.getRecord();
        while (mapCursor.hasNext()) {
            MapValue value = mapRecord.getValue();
            // timestamp is always stored in value field 0
            value.putLong(0, Numbers.LONG_NaN);
            // this would set values for when keys are not found right away
            for (int i = 0; i < n; i++) {
                groupByFunctions.getQuick(i).setNull(value);
            }
        }
    }
}

Example 20 with MapValue

use of io.questdb.cairo.map.MapValue in project questdb by bluestreak01.

the class SampleByFillPrevRecordCursor method hasNext.

@Override
public boolean hasNext() {
    // 
    if (mapCursor.hasNext()) {
        // next() will return record that uses current map position
        return true;
    }
    if (baseRecord == null) {
        return false;
    }
    // the next sample epoch could be different from current sample epoch due to DST transition,
    // e.g. clock going backward
    // we need to ensure we do not fill time transition
    final long expectedLocalEpoch = timestampSampler.nextTimestamp(nextSampleLocalEpoch);
    // is data timestamp ahead of next expected timestamp?
    if (expectedLocalEpoch < localEpoch) {
        this.sampleLocalEpoch = expectedLocalEpoch;
        this.nextSampleLocalEpoch = expectedLocalEpoch;
        // reset iterator on map and stream contents
        map.getCursor().hasNext();
        return true;
    }
    long next = timestampSampler.nextTimestamp(localEpoch);
    this.sampleLocalEpoch = localEpoch;
    this.nextSampleLocalEpoch = localEpoch;
    // looks like we need to populate key map
    int n = groupByFunctions.size();
    while (true) {
        long timestamp = getBaseRecordTimestamp();
        if (timestamp < next) {
            adjustDSTInFlight(timestamp - tzOffset);
            final MapKey key = map.withKey();
            keyMapSink.copy(baseRecord, key);
            final MapValue value = key.findValue();
            assert value != null;
            if (value.getLong(0) != localEpoch) {
                value.putLong(0, localEpoch);
                GroupByUtils.updateNew(groupByFunctions, n, value, baseRecord);
            } else {
                GroupByUtils.updateExisting(groupByFunctions, n, value, baseRecord);
            }
            // carry on with the loop if we still have data
            if (base.hasNext()) {
                interruptor.checkInterrupted();
                continue;
            }
            // we ran out of data, make sure hasNext() returns false at the next
            // opportunity, after we stream map that is.
            baseRecord = null;
        } else {
            // timestamp changed, make sure we keep the value of 'lastTimestamp'
            // unchanged. Timestamp columns uses this variable
            // When map is exhausted we would assign 'next' to 'lastTimestamp'
            // and build another map
            timestamp = adjustDST(timestamp, n, null, next);
            if (timestamp != Long.MIN_VALUE) {
                nextSamplePeriod(timestamp);
            }
        }
        return this.map.getCursor().hasNext();
    }
}