Пример #1
0
    @Override
    protected void updateMeta(final byte[] oldRegion1, final byte[] oldRegion2, HRegion newRegion)
        throws IOException {
      byte[][] regionsToDelete = {oldRegion1, oldRegion2};
      for (int r = 0; r < regionsToDelete.length; r++) {
        Delete delete = new Delete(regionsToDelete[r]);
        delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER);
        delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.SERVER_QUALIFIER);
        delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.STARTCODE_QUALIFIER);
        delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.SPLITA_QUALIFIER);
        delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.SPLITB_QUALIFIER);
        root.delete(delete, null, true);

        if (LOG.isDebugEnabled()) {
          LOG.debug("updated columns in row: " + Bytes.toStringBinary(regionsToDelete[r]));
        }
      }
      HRegionInfo newInfo = newRegion.getRegionInfo();
      newInfo.setOffline(true);
      Put put = new Put(newRegion.getRegionName());
      put.add(
          HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER, Writables.getBytes(newInfo));
      root.put(put);
      if (LOG.isDebugEnabled()) {
        LOG.debug("updated columns in row: " + Bytes.toStringBinary(newRegion.getRegionName()));
      }
    }
Пример #2
0
 /*
  * 删除指定的列
  *
  * @tableName 表名
  *
  * @rowKey rowKey
  *
  * @familyName 列族名
  *
  * @columnName 列名
  */
 public static void deleteColumn(
     String tableName, String rowKey, String falilyName, String columnName) throws IOException {
   HTable table = new HTable(conf, Bytes.toBytes(tableName));
   Delete deleteColumn = new Delete(Bytes.toBytes(rowKey));
   deleteColumn.deleteColumns(Bytes.toBytes(falilyName), Bytes.toBytes(columnName));
   table.delete(deleteColumn);
   System.out.println(falilyName + ":" + columnName + "is deleted!");
 }
Пример #3
0
 /**
  * 删除列
  *
  * @param tableName 表名
  * @param rowKey 行键名
  * @param falilyName 列族名
  * @param columnName 列名
  */
 public void deleteColumn(String tableName, String rowKey, String falilyName, String columnName) {
   try {
     HTable table = new HTable(conf, Bytes.toBytes(tableName));
     Delete deleteColumn = new Delete(Bytes.toBytes(rowKey));
     deleteColumn.deleteColumns(Bytes.toBytes(falilyName), Bytes.toBytes(columnName));
     table.delete(deleteColumn);
   } catch (Exception e) {
     logger.error("deleteColumn failed", e);
   }
 }
Пример #4
0
 public void removeSingleElement(Object key, Element value) {
   final Delete delete = new Delete(ByteArraySerializer.fromObject(key));
   delete.deleteColumns(Bytes.toBytes(VALUES), (byte[]) value.getId());
   try {
     backingTable.delete(delete);
   } catch (IOException e) {
     LOG.severe("Cannot delete from backing table");
     e.printStackTrace();
   }
 }
Пример #5
0
 @Override
 protected void undoState(Iterable<byte[]> rows, int size) throws IOException {
   List<Delete> deletes = Lists.newArrayListWithCapacity(size);
   for (byte[] row : rows) {
     Delete delete = new Delete(keyDistributor.getDistributedKey(row));
     delete.deleteColumns(QueueEntryRow.COLUMN_FAMILY, stateColumnName);
     deletes.add(delete);
   }
   hTable.delete(deletes);
   hTable.flushCommits();
 }
Пример #6
0
  public static void main(String[] args) throws IOException {
    Configuration conf = HBaseConfiguration.create();
    HTable hTable = new HTable(conf, "HBaseSamples");

    Delete delete = new Delete(toBytes("rowToDelete"));
    hTable.delete(delete);

    Delete delete1 = new Delete(toBytes("anotherRow"));
    delete1.deleteColumns(toBytes("metrics"), toBytes("loan"));
    hTable.delete(delete1);

    hTable.close();
  }
Пример #7
0
 /**
  * Deletes daughters references in offlined split parent.
  *
  * @param catalogTracker
  * @param parent Parent row we're to remove daughter reference from
  * @throws NotAllMetaRegionsOnlineException
  * @throws IOException
  */
 public static void deleteDaughtersReferencesInParent(
     CatalogTracker catalogTracker, final HRegionInfo parent)
     throws NotAllMetaRegionsOnlineException, IOException {
   Delete delete = new Delete(parent.getRegionName());
   delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.SPLITA_QUALIFIER);
   delete.deleteColumns(HConstants.CATALOG_FAMILY, HConstants.SPLITB_QUALIFIER);
   deleteFromMetaTable(catalogTracker, delete);
   LOG.info(
       "Deleted daughters references, qualifier="
           + Bytes.toStringBinary(HConstants.SPLITA_QUALIFIER)
           + " and qualifier="
           + Bytes.toStringBinary(HConstants.SPLITB_QUALIFIER)
           + ", from parent "
           + parent.getRegionNameAsString());
 }
Пример #8
0
 @Override
 public void setValue(PColumn column, byte[] byteValue) {
   deleteRow = null;
   byte[] family = column.getFamilyName().getBytes();
   byte[] qualifier = column.getName().getBytes();
   PDataType type = column.getDataType();
   // Check null, since some types have no byte representation for null
   if (byteValue == null || byteValue.length == 0) {
     if (!column.isNullable()) {
       throw new ConstraintViolationException(
           name.getString() + "." + column.getName().getString() + " may not be null");
     }
     removeIfPresent(setValues, family, qualifier);
     unsetValues.deleteColumns(family, qualifier, ts);
   } else {
     Integer byteSize = column.getByteSize();
     if (type.isFixedWidth()) { // TODO: handle multi-byte characters
       if (byteValue.length != byteSize) {
         throw new ConstraintViolationException(
             name.getString()
                 + "."
                 + column.getName().getString()
                 + " must be "
                 + byteSize
                 + " bytes ("
                 + type.toObject(byteValue)
                 + ")");
       }
     } else if (byteSize != null && byteValue.length > byteSize) {
       throw new ConstraintViolationException(
           name.getString()
               + "."
               + column.getName().getString()
               + " may not exceed "
               + byteSize
               + " bytes ("
               + type.toObject(byteValue)
               + ")");
     }
     removeIfPresent(unsetValues, family, qualifier);
     setValues.add(family, qualifier, ts, byteValue);
   }
 }
  @BeforeClass
  public static void setUpBeforeClass() throws Exception {
    TEST_UTIL.startMiniCluster(3);
    REST_TEST_UTIL.startServletContainer(TEST_UTIL.getConfiguration());
    context =
        JAXBContext.newInstance(
            CellModel.class, CellSetModel.class, RowModel.class, ScannerModel.class);
    marshaller = context.createMarshaller();
    unmarshaller = context.createUnmarshaller();
    client = new Client(new Cluster().add("localhost", REST_TEST_UTIL.getServletPort()));
    HBaseAdmin admin = TEST_UTIL.getHBaseAdmin();
    if (!admin.tableExists(TABLE)) {
      HTableDescriptor htd = new HTableDescriptor(TABLE);
      htd.addFamily(new HColumnDescriptor(FAMILIES[0]));
      htd.addFamily(new HColumnDescriptor(FAMILIES[1]));
      admin.createTable(htd);
      HTable table = new HTable(TEST_UTIL.getConfiguration(), TABLE);
      // Insert first half
      for (byte[] ROW : ROWS_ONE) {
        Put p = new Put(ROW);
        for (byte[] QUALIFIER : QUALIFIERS_ONE) {
          p.add(FAMILIES[0], QUALIFIER, VALUES[0]);
        }
        table.put(p);
      }
      for (byte[] ROW : ROWS_TWO) {
        Put p = new Put(ROW);
        for (byte[] QUALIFIER : QUALIFIERS_TWO) {
          p.add(FAMILIES[1], QUALIFIER, VALUES[1]);
        }
        table.put(p);
      }

      // Insert second half (reverse families)
      for (byte[] ROW : ROWS_ONE) {
        Put p = new Put(ROW);
        for (byte[] QUALIFIER : QUALIFIERS_ONE) {
          p.add(FAMILIES[1], QUALIFIER, VALUES[0]);
        }
        table.put(p);
      }
      for (byte[] ROW : ROWS_TWO) {
        Put p = new Put(ROW);
        for (byte[] QUALIFIER : QUALIFIERS_TWO) {
          p.add(FAMILIES[0], QUALIFIER, VALUES[1]);
        }
        table.put(p);
      }

      // Delete the second qualifier from all rows and families
      for (byte[] ROW : ROWS_ONE) {
        Delete d = new Delete(ROW);
        d.deleteColumns(FAMILIES[0], QUALIFIERS_ONE[1]);
        d.deleteColumns(FAMILIES[1], QUALIFIERS_ONE[1]);
        table.delete(d);
      }
      for (byte[] ROW : ROWS_TWO) {
        Delete d = new Delete(ROW);
        d.deleteColumns(FAMILIES[0], QUALIFIERS_TWO[1]);
        d.deleteColumns(FAMILIES[1], QUALIFIERS_TWO[1]);
        table.delete(d);
      }
      colsPerRow -= 2;

      // Delete the second rows from both groups, one column at a time
      for (byte[] QUALIFIER : QUALIFIERS_ONE) {
        Delete d = new Delete(ROWS_ONE[1]);
        d.deleteColumns(FAMILIES[0], QUALIFIER);
        d.deleteColumns(FAMILIES[1], QUALIFIER);
        table.delete(d);
      }
      for (byte[] QUALIFIER : QUALIFIERS_TWO) {
        Delete d = new Delete(ROWS_TWO[1]);
        d.deleteColumns(FAMILIES[0], QUALIFIER);
        d.deleteColumns(FAMILIES[1], QUALIFIER);
        table.delete(d);
      }
      numRows -= 2;
    }
  }
  /**
   * Test transactional delete operations.
   *
   * @throws Exception
   */
  @Test
  public void testValidTransactionalDelete() throws Exception {
    try (HTable hTable =
        createTable(
            Bytes.toBytes("TestValidTransactionalDelete"),
            new byte[][] {TestBytes.family, TestBytes.family2})) {
      TransactionAwareHTable txTable = new TransactionAwareHTable(hTable);
      TransactionContext txContext =
          new TransactionContext(new InMemoryTxSystemClient(txManager), txTable);

      txContext.start();
      Put put = new Put(TestBytes.row);
      put.add(TestBytes.family, TestBytes.qualifier, TestBytes.value);
      put.add(TestBytes.family2, TestBytes.qualifier, TestBytes.value2);
      txTable.put(put);
      txContext.finish();

      txContext.start();
      Result result = txTable.get(new Get(TestBytes.row));
      txContext.finish();
      byte[] value = result.getValue(TestBytes.family, TestBytes.qualifier);
      assertArrayEquals(TestBytes.value, value);
      value = result.getValue(TestBytes.family2, TestBytes.qualifier);
      assertArrayEquals(TestBytes.value2, value);

      // test full row delete
      txContext.start();
      Delete delete = new Delete(TestBytes.row);
      txTable.delete(delete);
      txContext.finish();

      txContext.start();
      result = txTable.get(new Get(TestBytes.row));
      txContext.finish();
      assertTrue(result.isEmpty());

      // test column delete
      // load 10 rows
      txContext.start();
      int rowCount = 10;
      for (int i = 0; i < rowCount; i++) {
        Put p = new Put(Bytes.toBytes("row" + i));
        for (int j = 0; j < 10; j++) {
          p.add(TestBytes.family, Bytes.toBytes(j), TestBytes.value);
        }
        txTable.put(p);
      }
      txContext.finish();

      // verify loaded rows
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Get g = new Get(Bytes.toBytes("row" + i));
        Result r = txTable.get(g);
        assertFalse(r.isEmpty());
        for (int j = 0; j < 10; j++) {
          assertArrayEquals(TestBytes.value, r.getValue(TestBytes.family, Bytes.toBytes(j)));
        }
      }
      txContext.finish();

      // delete odds columns from odd rows and even columns from even rows
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Delete d = new Delete(Bytes.toBytes("row" + i));
        for (int j = 0; j < 10; j++) {
          if (i % 2 == j % 2) {
            LOG.info("Deleting row={}, column={}", i, j);
            d.deleteColumns(TestBytes.family, Bytes.toBytes(j));
          }
        }
        txTable.delete(d);
      }
      txContext.finish();

      // verify deleted columns
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Get g = new Get(Bytes.toBytes("row" + i));
        Result r = txTable.get(g);
        assertEquals(5, r.size());
        for (Map.Entry<byte[], byte[]> entry : r.getFamilyMap(TestBytes.family).entrySet()) {
          int col = Bytes.toInt(entry.getKey());
          LOG.info("Got row={}, col={}", i, col);
          // each row should only have the opposite mod (odd=even, even=odd)
          assertNotEquals(i % 2, col % 2);
          assertArrayEquals(TestBytes.value, entry.getValue());
        }
      }
      txContext.finish();

      // test family delete
      // load 10 rows
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Put p = new Put(Bytes.toBytes("famrow" + i));
        p.add(TestBytes.family, TestBytes.qualifier, TestBytes.value);
        p.add(TestBytes.family2, TestBytes.qualifier2, TestBytes.value2);
        txTable.put(p);
      }
      txContext.finish();

      // verify all loaded rows
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Get g = new Get(Bytes.toBytes("famrow" + i));
        Result r = txTable.get(g);
        assertEquals(2, r.size());
        assertArrayEquals(TestBytes.value, r.getValue(TestBytes.family, TestBytes.qualifier));
        assertArrayEquals(TestBytes.value2, r.getValue(TestBytes.family2, TestBytes.qualifier2));
      }
      txContext.finish();

      // delete family1 for even rows, family2 for odd rows
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Delete d = new Delete(Bytes.toBytes("famrow" + i));
        d.deleteFamily((i % 2 == 0) ? TestBytes.family : TestBytes.family2);
        txTable.delete(d);
      }
      txContext.finish();

      // verify deleted families
      txContext.start();
      for (int i = 0; i < rowCount; i++) {
        Get g = new Get(Bytes.toBytes("famrow" + i));
        Result r = txTable.get(g);
        assertEquals(1, r.size());
        if (i % 2 == 0) {
          assertNull(r.getValue(TestBytes.family, TestBytes.qualifier));
          assertArrayEquals(TestBytes.value2, r.getValue(TestBytes.family2, TestBytes.qualifier2));
        } else {
          assertArrayEquals(TestBytes.value, r.getValue(TestBytes.family, TestBytes.qualifier));
          assertNull(r.getValue(TestBytes.family2, TestBytes.qualifier2));
        }
      }
      txContext.finish();
    }
  }
  @Override
  protected RegionScanner doPostScannerOpen(
      final ObserverContext<RegionCoprocessorEnvironment> c, final Scan scan, final RegionScanner s)
      throws IOException {
    byte[] isUngroupedAgg = scan.getAttribute(BaseScannerRegionObserver.UNGROUPED_AGG);
    if (isUngroupedAgg == null) {
      return s;
    }

    final ScanProjector p = ScanProjector.deserializeProjectorFromScan(scan);
    final HashJoinInfo j = HashJoinInfo.deserializeHashJoinFromScan(scan);
    RegionScanner theScanner = s;
    if (p != null || j != null) {
      theScanner =
          new HashJoinRegionScanner(s, p, j, ScanUtil.getTenantId(scan), c.getEnvironment());
    }
    final RegionScanner innerScanner = theScanner;

    byte[] indexUUID = scan.getAttribute(PhoenixIndexCodec.INDEX_UUID);
    PTable projectedTable = null;
    List<Expression> selectExpressions = null;
    byte[] upsertSelectTable = scan.getAttribute(BaseScannerRegionObserver.UPSERT_SELECT_TABLE);
    boolean isUpsert = false;
    boolean isDelete = false;
    byte[] deleteCQ = null;
    byte[] deleteCF = null;
    byte[][] values = null;
    byte[] emptyCF = null;
    ImmutableBytesWritable ptr = null;
    if (upsertSelectTable != null) {
      isUpsert = true;
      projectedTable = deserializeTable(upsertSelectTable);
      selectExpressions =
          deserializeExpressions(scan.getAttribute(BaseScannerRegionObserver.UPSERT_SELECT_EXPRS));
      values = new byte[projectedTable.getPKColumns().size()][];
      ptr = new ImmutableBytesWritable();
    } else {
      byte[] isDeleteAgg = scan.getAttribute(BaseScannerRegionObserver.DELETE_AGG);
      isDelete = isDeleteAgg != null && Bytes.compareTo(PDataType.TRUE_BYTES, isDeleteAgg) == 0;
      if (!isDelete) {
        deleteCF = scan.getAttribute(BaseScannerRegionObserver.DELETE_CF);
        deleteCQ = scan.getAttribute(BaseScannerRegionObserver.DELETE_CQ);
      }
      emptyCF = scan.getAttribute(BaseScannerRegionObserver.EMPTY_CF);
    }

    int batchSize = 0;
    long ts = scan.getTimeRange().getMax();
    HRegion region = c.getEnvironment().getRegion();
    List<Mutation> mutations = Collections.emptyList();
    if (isDelete || isUpsert || (deleteCQ != null && deleteCF != null) || emptyCF != null) {
      // TODO: size better
      mutations = Lists.newArrayListWithExpectedSize(1024);
      batchSize =
          c.getEnvironment()
              .getConfiguration()
              .getInt(MUTATE_BATCH_SIZE_ATTRIB, QueryServicesOptions.DEFAULT_MUTATE_BATCH_SIZE);
    }
    Aggregators aggregators =
        ServerAggregators.deserialize(
            scan.getAttribute(BaseScannerRegionObserver.AGGREGATORS),
            c.getEnvironment().getConfiguration());
    Aggregator[] rowAggregators = aggregators.getAggregators();
    boolean hasMore;
    boolean hasAny = false;
    MultiKeyValueTuple result = new MultiKeyValueTuple();
    if (logger.isInfoEnabled()) {
      logger.info("Starting ungrouped coprocessor scan " + scan);
    }
    long rowCount = 0;
    region.startRegionOperation();
    try {
      do {
        List<Cell> results = new ArrayList<Cell>();
        // Results are potentially returned even when the return value of s.next is false
        // since this is an indication of whether or not there are more values after the
        // ones returned
        hasMore = innerScanner.nextRaw(results);
        if (!results.isEmpty()) {
          rowCount++;
          result.setKeyValues(results);
          try {
            if (isDelete) {
              // FIXME: the version of the Delete constructor without the lock args was introduced
              // in 0.94.4, thus if we try to use it here we can no longer use the 0.94.2 version
              // of the client.
              Cell firstKV = results.get(0);
              Delete delete =
                  new Delete(
                      firstKV.getRowArray(), firstKV.getRowOffset(), firstKV.getRowLength(), ts);
              mutations.add(delete);
            } else if (isUpsert) {
              Arrays.fill(values, null);
              int i = 0;
              List<PColumn> projectedColumns = projectedTable.getColumns();
              for (; i < projectedTable.getPKColumns().size(); i++) {
                Expression expression = selectExpressions.get(i);
                if (expression.evaluate(result, ptr)) {
                  values[i] = ptr.copyBytes();
                  // If SortOrder from expression in SELECT doesn't match the
                  // column being projected into then invert the bits.
                  if (expression.getSortOrder() != projectedColumns.get(i).getSortOrder()) {
                    SortOrder.invert(values[i], 0, values[i], 0, values[i].length);
                  }
                }
              }
              projectedTable.newKey(ptr, values);
              PRow row = projectedTable.newRow(kvBuilder, ts, ptr);
              for (; i < projectedColumns.size(); i++) {
                Expression expression = selectExpressions.get(i);
                if (expression.evaluate(result, ptr)) {
                  PColumn column = projectedColumns.get(i);
                  Object value = expression.getDataType().toObject(ptr, column.getSortOrder());
                  // We are guaranteed that the two column will have the same type.
                  if (!column
                      .getDataType()
                      .isSizeCompatible(
                          ptr,
                          value,
                          column.getDataType(),
                          expression.getMaxLength(),
                          expression.getScale(),
                          column.getMaxLength(),
                          column.getScale())) {
                    throw new ValueTypeIncompatibleException(
                        column.getDataType(), column.getMaxLength(), column.getScale());
                  }
                  column
                      .getDataType()
                      .coerceBytes(
                          ptr,
                          value,
                          expression.getDataType(),
                          expression.getMaxLength(),
                          expression.getScale(),
                          expression.getSortOrder(),
                          column.getMaxLength(),
                          column.getScale(),
                          column.getSortOrder());
                  byte[] bytes = ByteUtil.copyKeyBytesIfNecessary(ptr);
                  row.setValue(column, bytes);
                }
              }
              for (Mutation mutation : row.toRowMutations()) {
                mutations.add(mutation);
              }
            } else if (deleteCF != null && deleteCQ != null) {
              // No need to search for delete column, since we project only it
              // if no empty key value is being set
              if (emptyCF == null || result.getValue(deleteCF, deleteCQ) != null) {
                Delete delete =
                    new Delete(
                        results.get(0).getRowArray(),
                        results.get(0).getRowOffset(),
                        results.get(0).getRowLength());
                delete.deleteColumns(deleteCF, deleteCQ, ts);
                mutations.add(delete);
              }
            }
            if (emptyCF != null) {
              /*
               * If we've specified an emptyCF, then we need to insert an empty
               * key value "retroactively" for any key value that is visible at
               * the timestamp that the DDL was issued. Key values that are not
               * visible at this timestamp will not ever be projected up to
               * scans past this timestamp, so don't need to be considered.
               * We insert one empty key value per row per timestamp.
               */
              Set<Long> timeStamps = Sets.newHashSetWithExpectedSize(results.size());
              for (Cell kv : results) {
                long kvts = kv.getTimestamp();
                if (!timeStamps.contains(kvts)) {
                  Put put = new Put(kv.getRowArray(), kv.getRowOffset(), kv.getRowLength());
                  put.add(
                      emptyCF, QueryConstants.EMPTY_COLUMN_BYTES, kvts, ByteUtil.EMPTY_BYTE_ARRAY);
                  mutations.add(put);
                }
              }
            }
            // Commit in batches based on UPSERT_BATCH_SIZE_ATTRIB in config
            if (!mutations.isEmpty() && batchSize > 0 && mutations.size() % batchSize == 0) {
              commitBatch(region, mutations, indexUUID);
              mutations.clear();
            }
          } catch (ConstraintViolationException e) {
            // Log and ignore in count
            logger.error(
                "Failed to create row in "
                    + region.getRegionNameAsString()
                    + " with values "
                    + SchemaUtil.toString(values),
                e);
            continue;
          }
          aggregators.aggregate(rowAggregators, result);
          hasAny = true;
        }
      } while (hasMore);
    } finally {
      innerScanner.close();
      region.closeRegionOperation();
    }

    if (logger.isInfoEnabled()) {
      logger.info("Finished scanning " + rowCount + " rows for ungrouped coprocessor scan " + scan);
    }

    if (!mutations.isEmpty()) {
      commitBatch(region, mutations, indexUUID);
    }

    final boolean hadAny = hasAny;
    KeyValue keyValue = null;
    if (hadAny) {
      byte[] value = aggregators.toBytes(rowAggregators);
      keyValue =
          KeyValueUtil.newKeyValue(
              UNGROUPED_AGG_ROW_KEY,
              SINGLE_COLUMN_FAMILY,
              SINGLE_COLUMN,
              AGG_TIMESTAMP,
              value,
              0,
              value.length);
    }
    final KeyValue aggKeyValue = keyValue;

    RegionScanner scanner =
        new BaseRegionScanner() {
          private boolean done = !hadAny;

          @Override
          public HRegionInfo getRegionInfo() {
            return innerScanner.getRegionInfo();
          }

          @Override
          public boolean isFilterDone() {
            return done;
          }

          @Override
          public void close() throws IOException {
            innerScanner.close();
          }

          @Override
          public boolean next(List<Cell> results) throws IOException {
            if (done) return false;
            done = true;
            results.add(aggKeyValue);
            return false;
          }

          @Override
          public long getMaxResultSize() {
            return scan.getMaxResultSize();
          }
        };
    return scanner;
  }