org.apache.hadoop.hive.ql.io.orc.OrcFileFormatProxy Maven / Gradle / Ivy
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package org.apache.hadoop.hive.ql.io.orc;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hive.metastore.FileFormatProxy;
import org.apache.hadoop.hive.metastore.Metastore.SplitInfo;
import org.apache.hadoop.hive.metastore.Metastore.SplitInfos;
import org.apache.hadoop.hive.ql.io.sarg.SearchArgument;
import org.apache.orc.OrcProto;
import org.apache.orc.StripeInformation;
import org.apache.orc.StripeStatistics;
import org.apache.orc.impl.OrcTail;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/** File format proxy for ORC. */
public class OrcFileFormatProxy implements FileFormatProxy {
private static final Logger LOG = LoggerFactory.getLogger(OrcFileFormatProxy.class);
@Override
public SplitInfos applySargToMetadata(
SearchArgument sarg, ByteBuffer fileMetadata) throws IOException {
// TODO: ideally we should store shortened representation of only the necessary fields
// in HBase; it will probably require custom SARG application code.
OrcTail orcTail = ReaderImpl.extractFileTail(fileMetadata);
OrcProto.Footer footer = orcTail.getFooter();
int stripeCount = footer.getStripesCount();
boolean[] result = OrcInputFormat.pickStripesViaTranslatedSarg(
sarg, orcTail.getWriterVersion(),
footer.getTypesList(), orcTail.getStripeStatistics(), stripeCount);
// For ORC case, send the boundaries of the stripes so we don't have to send the footer.
SplitInfos.Builder sb = SplitInfos.newBuilder();
List stripes = orcTail.getStripes();
boolean isEliminated = true;
for (int i = 0; i < result.length; ++i) {
if (result != null && !result[i]) continue;
isEliminated = false;
StripeInformation si = stripes.get(i);
if (LOG.isDebugEnabled()) {
LOG.debug("PPD is adding a split " + i + ": " + si.getOffset() + ", " + si.getLength());
}
sb.addInfos(SplitInfo.newBuilder().setIndex(i)
.setOffset(si.getOffset()).setLength(si.getLength()));
}
return isEliminated ? null : sb.build();
}
public ByteBuffer[] getAddedColumnsToCache() {
return null; // Nothing so far.
}
public ByteBuffer[][] getAddedValuesToCache(List metadata) {
throw new UnsupportedOperationException(); // Nothing so far (and shouldn't be called).
}
public ByteBuffer getMetadataToCache(
FileSystem fs, Path path, ByteBuffer[] addedVals) throws IOException {
// For now, there's nothing special to return in addedVals. Just return the footer.
return OrcFile.createReader(fs, path).getSerializedFileFooter();
}
}