Examples with SingleMapState org.apache.drill.exec.physical.resultSet.impl.TupleState.SingleMapState used on opensource projects

Example 1 with SingleMapState

use of org.apache.drill.exec.physical.resultSet.impl.TupleState.SingleMapState in project drill by apache.

the class ColumnBuilder method buildSingleMap.

private ColumnState buildSingleMap(ContainerState parent, ColumnMetadata columnSchema) {
    final ProjectionFilter projFilter = parent.projection();
    final ProjResult projResult = projFilter.projection(columnSchema);
    final MapVector vector;
    final VectorState vectorState;
    if (projResult.isProjected) {
        // vectors can be cached.
        assert columnSchema.tupleSchema().isEmpty();
        vector = new MapVector(columnSchema.schema(), parent.loader().allocator(), null);
        vectorState = new MapVectorState(vector, new NullVectorState());
    } else {
        vector = null;
        vectorState = new NullVectorState();
    }
    final TupleObjectWriter mapWriter = MapWriter.buildMap(columnSchema, vector, new ArrayList<>());
    final SingleMapState mapState = new SingleMapState(parent.loader(), parent.vectorCache().childCache(columnSchema.name()), projResult.mapFilter);
    return new MapColumnState(mapState, mapWriter, vectorState, parent.isVersioned());
}