Examples with KVIndex com.questdb.store.KVIndex used on opensource projects

Example 6 with KVIndex

use of com.questdb.store.KVIndex in project questdb by bluestreak01.

the class KvIndexStrLookupRowSource method prepareCursor.

@Override
public RowCursor prepareCursor(PartitionSlice slice) {
    try {
        this.column = slice.partition.varCol(columnIndex);
        KVIndex index = slice.partition.getIndexForColumn(columnIndex);
        this.indexCursor = newCursor ? index.newFwdCursor(hash) : index.fwdCursor(hash);
        this.lo = slice.lo - 1;
        this.hi = slice.calcHi ? slice.partition.open().size() : slice.hi + 1;
        this.hasNext = false;
    } catch (JournalException e) {
        throw new JournalRuntimeException(e);
    }
    return this;
}

Example 7 with KVIndex

use of com.questdb.store.KVIndex in project questdb by bluestreak01.

the class KvIndexStrLambdaHeadRowSource method prepareCursor.

@Override
public RowCursor prepareCursor(PartitionSlice slice) {
    try {
        Partition partition = rec.partition = slice.partition.open();
        KVIndex index = partition.getIndexForColumn(columnIndex);
        VariableColumn col = partition.varCol(columnIndex);
        long lo = slice.lo - 1;
        long hi = slice.calcHi ? partition.size() : slice.hi + 1;
        rows.clear();
        for (int i = 0, n = hashes.size(); i < n; i++) {
            IndexCursor c = index.cursor(hashes.getQuick(i));
            while (c.hasNext()) {
                long r = rec.rowid = c.next();
                if (r > lo && r < hi && Chars.equals(col.getFlyweightStr(r), keys.get(i)) && (filter == null || filter.getBool(rec))) {
                    rows.add(r);
                    break;
                }
            }
        }
        rows.sort();
        cursor = 0;
        return this;
    } catch (JournalException e) {
        throw new JournalRuntimeException(e);
    }
}

Example 8 with KVIndex

use of com.questdb.store.KVIndex in project questdb by bluestreak01.

the class KvIndexSymLambdaHeadRowSource method prepareCursor.

@Override
public RowCursor prepareCursor(PartitionSlice slice) {
    try {
        Partition partition = rec.partition = slice.partition.open();
        KVIndex index = partition.getIndexForColumn(columnIndex);
        long lo = slice.lo - 1;
        long hi = slice.calcHi ? partition.size() : slice.hi + 1;
        rows.clear();
        for (int i = 0, n = keys.size(); i < n; i++) {
            IndexCursor c = index.cursor(keys.get(i));
            while (c.hasNext()) {
                long r = rec.rowid = c.next();
                if (r > lo && r < hi && (filter == null || filter.getBool(rec))) {
                    rows.add(r);
                    break;
                }
            }
        }
        rows.sort();
        cursor = 0;
        return this;
    } catch (JournalException e) {
        throw new JournalRuntimeException(e);
    }
}

Example 9 with KVIndex

use of com.questdb.store.KVIndex in project questdb by bluestreak01.

the class KvIndexIntLookupRowSource method prepareCursor.

@Override
public RowCursor prepareCursor(PartitionSlice slice) {
    try {
        column = slice.partition.fixCol(columnIndex);
        KVIndex index = slice.partition.getIndexForColumn(columnIndex);
        this.indexCursor = newCursor ? index.newFwdCursor(key) : index.fwdCursor(key);
        this.lo = slice.lo - 1;
        this.hi = slice.calcHi ? slice.partition.open().size() : slice.hi + 1;
    } catch (JournalException e) {
        throw new JournalRuntimeException(e);
    }
    return this;
}

Example 10 with KVIndex

use of com.questdb.store.KVIndex in project questdb by bluestreak01.

the class KvIndexStrListHeadRowSource method prepareCursor.

@Override
public RowCursor prepareCursor(PartitionSlice slice) {
    try {
        Partition partition = rec.partition = slice.partition.open();
        KVIndex index = partition.getIndexForColumn(columnIndex);
        VariableColumn col = partition.varCol(columnIndex);
        long lo = slice.lo - 1;
        long hi = slice.calcHi ? partition.size() : slice.hi + 1;
        rows.clear();
        for (int i = 0, n = values.size(); i < n; i++) {
            IndexCursor c = index.cursor(Hash.boundedHash(values.get(i), buckets));
            while (c.hasNext()) {
                long r = rec.rowid = c.next();
                if (r > lo && r < hi && col.cmpStr(r, values.get(i)) && (filter == null || filter.getBool(rec))) {
                    rows.add(r);
                    break;
                }
            }
        }
        rows.sort();
        keyIndex = 0;
        return this;
    } catch (JournalException e) {
        throw new JournalRuntimeException(e);
    }
}