Java Code Examples for org.apache.hive.hcatalog.data.transfer.DataTransferFactory#getHCatReader()

The following examples show how to use org.apache.hive.hcatalog.data.transfer.DataTransferFactory#getHCatReader() . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example 1
Source File: HiveTableReader.java    From kylin-on-parquet-v2 with Apache License 2.0 6 votes vote down vote up 
private static ReaderContext getHiveReaderContext(String database, String table, Map<String, String> partitionKV) throws Exception {
    HiveConf hiveConf = new HiveConf(HiveTableReader.class);
    Iterator<Entry<String, String>> itr = hiveConf.iterator();
    Map<String, String> map = new HashMap<String, String>();
    while (itr.hasNext()) {
        Entry<String, String> kv = itr.next();
        map.put(kv.getKey(), kv.getValue());
    }

    ReadEntity entity;
    if (partitionKV == null || partitionKV.size() == 0) {
        entity = new ReadEntity.Builder().withDatabase(database).withTable(table).build();
    } else {
        entity = new ReadEntity.Builder().withDatabase(database).withTable(table).withPartition(partitionKV).build();
    }

    HCatReader reader = DataTransferFactory.getHCatReader(entity, map);
    ReaderContext cntxt = reader.prepareRead();

    return cntxt;
}
Example 2
Source File: HiveTableReader.java    From kylin with Apache License 2.0 6 votes vote down vote up 
private static ReaderContext getHiveReaderContext(String database, String table, Map<String, String> partitionKV) throws Exception {
    HiveConf hiveConf = new HiveConf(HiveTableReader.class);
    Iterator<Entry<String, String>> itr = hiveConf.iterator();
    Map<String, String> map = new HashMap<String, String>();
    while (itr.hasNext()) {
        Entry<String, String> kv = itr.next();
        map.put(kv.getKey(), kv.getValue());
    }

    ReadEntity entity;
    if (partitionKV == null || partitionKV.size() == 0) {
        entity = new ReadEntity.Builder().withDatabase(database).withTable(table).build();
    } else {
        entity = new ReadEntity.Builder().withDatabase(database).withTable(table).withPartition(partitionKV).build();
    }

    HCatReader reader = DataTransferFactory.getHCatReader(entity, map);
    ReaderContext cntxt = reader.prepareRead();

    return cntxt;
}
Example 3
Source File: HiveTableReader.java    From Kylin with Apache License 2.0 6 votes vote down vote up 
private static ReaderContext getHiveReaderContext(String database, String table, Map<String, String> partitionKV) throws Exception {
    HiveConf hiveConf = new HiveConf(HiveTableReader.class);
    Iterator<Entry<String, String>> itr = hiveConf.iterator();
    Map<String, String> map = new HashMap<String, String>();
    while (itr.hasNext()) {
        Entry<String, String> kv = itr.next();
        map.put(kv.getKey(), kv.getValue());
    }

    ReadEntity entity;
    if (partitionKV == null || partitionKV.size() == 0) {
        entity = new ReadEntity.Builder().withDatabase(database).withTable(table).build();
    } else {
        entity = new ReadEntity.Builder().withDatabase(database).withTable(table).withPartition(partitionKV).build();
    }

    HCatReader reader = DataTransferFactory.getHCatReader(entity, map);
    ReaderContext cntxt = reader.prepareRead();

    return cntxt;
}
Example 4
Source File: PartitionReaderFn.java    From beam with Apache License 2.0 5 votes vote down vote up 
@ProcessElement
public void processElement(ProcessContext c) throws Exception {
  final Read readRequest = c.element().getKey();
  final Integer partitionIndexToRead = c.element().getValue();
  ReaderContext readerContext = getReaderContext(readRequest, partitionIndexToRead);
  for (int i = 0; i < readerContext.numSplits(); i++) {
    HCatReader reader = DataTransferFactory.getHCatReader(readerContext, i);
    Iterator<HCatRecord> hcatIterator = reader.read();
    while (hcatIterator.hasNext()) {
      final HCatRecord record = hcatIterator.next();
      c.output(record);
    }
  }
}
Example 5
Source File: HCatalogIO.java    From beam with Apache License 2.0 5 votes vote down vote up 
@Override
public boolean start() throws HCatException {
  HCatReader reader =
      DataTransferFactory.getHCatReader(source.spec.getContext(), source.spec.getSplitId());
  hcatIterator = reader.read();
  return advance();
}
Example 6
Source File: HiveTableReader.java    From kylin-on-parquet-v2 with Apache License 2.0 4 votes vote down vote up 
private static Iterator<HCatRecord> loadHCatRecordItr(ReaderContext readCntxt, int dataSplit) throws HCatException {
    HCatReader currentHCatReader = DataTransferFactory.getHCatReader(readCntxt, dataSplit);

    return currentHCatReader.read();
}
Example 7
Source File: HiveTableReader.java    From kylin with Apache License 2.0 4 votes vote down vote up 
private static Iterator<HCatRecord> loadHCatRecordItr(ReaderContext readCntxt, int dataSplit) throws HCatException {
    HCatReader currentHCatReader = DataTransferFactory.getHCatReader(readCntxt, dataSplit);

    return currentHCatReader.read();
}
Example 8
Source File: HiveTableReader.java    From Kylin with Apache License 2.0 4 votes vote down vote up 
private static Iterator<HCatRecord> loadHCatRecordItr(ReaderContext readCntxt, int dataSplit) throws HCatException {
    HCatReader currentHCatReader = DataTransferFactory.getHCatReader(readCntxt, dataSplit);
    return currentHCatReader.read();
}