Examples with AbstractObjectReader org.apache.drill.exec.vector.accessor.reader.AbstractObjectReader used on opensource projects

Example 16 with AbstractObjectReader

use of org.apache.drill.exec.vector.accessor.reader.AbstractObjectReader in project drill by apache.

the class HyperReaderBuilder method buildUnion.

private AbstractObjectReader buildUnion(VectorAccessor unionAccessor, ColumnMetadata metadata) {
    VariantMetadata unionSchema = metadata.variantSchema();
    final AbstractObjectReader[] variants = new AbstractObjectReader[MinorType.values().length];
    for (ColumnMetadata member : unionSchema.members()) {
        // The following builds a synthetic field since we have no good way to
        // access the real field at this point.
        variants[member.type().ordinal()] = buildVectorReader(new VectorAccessors.UnionMemberHyperVectorAccessor(unionAccessor, member.majorType()), member);
    }
    return UnionReaderImpl.build(metadata, unionAccessor, variants);
}