Examples of ColumnPrefixFilter

org.apache.hadoop.hbase.filter.ColumnPrefixFilter
This filter is used for selecting only those keys with columns that matches a particular prefix. For example, if prefix is 'an', it will pass keys with columns like 'and', 'anti' but not keys with columns like 'ball', 'act'.
org.hbase.async.ColumnPrefixFilter
Sets a binary prefix to filter results based on the column qualifier.
Efficiently compares the column qualifier bytes up to the length of the prefix to see if it matches.
Only setting this filter will return all rows that match the criteria but at the same will cost a full table scan. @since 1.5

Examples of org.apache.hadoop.hbase.filter.ColumnPrefixFilter


                // each column family filter consists of a FamilyFilter AND a PrefixFilter
                FilterList thisColumnFilter = new FilterList(FilterList.Operator.MUST_PASS_ALL);
                thisColumnFilter.addFilter(new FamilyFilter(CompareOp.EQUAL,
                        new BinaryComparator(colInfo.getColumnFamily())));
                thisColumnFilter.addFilter(new ColumnPrefixFilter(
                        colInfo.getColumnPrefix()));


                allColumnFilters.addFilter(thisColumnFilter);
            }
        }

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Examples of org.apache.hadoop.hbase.filter.ColumnPrefixFilter


      // Get all latest entry row key of all existing instances
      // Consumer state column is named as "<groupId><instanceId>"
      Get get = new Get(rowKey);
      get.addFamily(QueueEntryRow.COLUMN_FAMILY);
      get.setFilter(new ColumnPrefixFilter(Bytes.toBytes(groupId)));
      List<HBaseConsumerState> consumerStates = HBaseConsumerState.create(hTable.get(get));


      int oldInstances = consumerStates.size();


      // Nothing to do if size doesn't change

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Examples of org.apache.hadoop.hbase.filter.ColumnPrefixFilter


      // Get all latest entry row key of all existing instances
      // Consumer state column is named as "<groupId><instanceId>"
      Get get = new Get(rowKey);
      get.addFamily(QueueEntryRow.COLUMN_FAMILY);
      get.setFilter(new ColumnPrefixFilter(Bytes.toBytes(groupId)));
      List<HBaseConsumerState> consumerStates = HBaseConsumerState.create(hTable.get(get));


      int oldInstances = consumerStates.size();


      // Nothing to do if size doesn't change

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Examples of org.apache.hadoop.hbase.filter.ColumnPrefixFilter

  protected void fetchAll(byte[] row, byte[] columnPrefix, Map<byte[], byte[]> result) throws IOException {
    Get get = new Get(row);
    get.addFamily(QueueEntryRow.COLUMN_FAMILY);
    get.setMaxVersions(1);
    if (columnPrefix != null) {
      get.setFilter(new ColumnPrefixFilter(columnPrefix));
    }
    Result hTableResult = hTable.get(get);


    if (hTableResult.isEmpty()) {
      return;

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Examples of org.apache.hadoop.hbase.filter.ColumnPrefixFilter

                                Bytes.toString(colInfo.getColumnPrefix()));
                    }


                    // add a PrefixFilter to the list of column filters
                    if (colInfo.getColumnPrefix() != null) {
                        columnFilters.addFilter(new ColumnPrefixFilter(
                            colInfo.getColumnPrefix()));
                    }
                }
                else {

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Examples of org.hbase.async.ColumnPrefixFilter

                   Deferred.group(client.put(put3), client.put(put4))).join();
    final Scanner scanner = client.newScanner(table);
    scanner.setFamily(family);
    scanner.setStartKey("cpf1");
    scanner.setStopKey("cpf3");
    scanner.setFilter(new ColumnPrefixFilter("qa"));
    final ArrayList<ArrayList<KeyValue>> rows = scanner.nextRows().join();
    assertSizeIs(2, rows);
    ArrayList<KeyValue> kvs = rows.get(0);
    assertSizeIs(2, kvs);
    assertEq("v1", kvs.get(0).value());

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