Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient.rowCount()

Package org.apache.hadoop.hbase.client.coprocessor

Class org.apache.hadoop.hbase.client.coprocessor.AggregationClient

Examples of org.apache.hadoop.hbase.client.coprocessor.AggregationClient.rowCount()

org.apache.hadoop.hbase.client.coprocessor.AggregationClient.rowCount()
It gives the row count, by summing up the individual results obtained from regions. In case the qualifier is null, FirstKEyValueFilter is used to optimised the operation. In case qualifier is provided, I can't use the filter as it may set the flag to skip to next row, but the value read is not of the given filter: in this case, this particular row will not be counted==> an error. @param tableName @param ci @param scan @return @throws Throwable

    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[2]);
    scan.setStopRow(ROWS[14]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    assertEquals(12, rowCount);
  }


  /**
   * This will test the row count on the entire table. Startrow and endrow will

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  public void testRowCountAllTable() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = aClient.rowCount(TEST_TABLE, ci,
        scan);
    assertEquals(ROWSIZE, rowCount);
  }


  /**

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    scan.setStopRow(ROWS[2]);


    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
      myLog.error("Exception thrown in the invalidRange method"
          + e.getStackTrace());
    }
    assertEquals(-1, rowCount);

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    scan.setStopRow(ROWS[5]);


    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
      rowCount = 0;
    }
    assertEquals(0, rowCount);
  }

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    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
       rowCount = 0;
    }
    assertEquals(0, rowCount);
  }

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  public void testRowCountWithNullCQ() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = aClient.rowCount(TEST_TABLE, ci,
        scan);
    assertEquals(20, rowCount);
  }


  @Test

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Filter f = new PrefixFilter(Bytes.toBytes("foo:bar"));
    scan.setFilter(f);
    long rowCount = aClient.rowCount(TEST_TABLE, ci,
        scan);
    assertEquals(0, rowCount);
  }


  /**

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[2]);
    scan.setStopRow(ROWS[14]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    assertEquals(12, rowCount);
  }


  /**
   * This will test the row count on the entire table. Startrow and endrow will

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  public void testRowCountAllTable() throws Throwable {
    AggregationClient aClient = new AggregationClient(conf);
    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = aClient.rowCount(TEST_TABLE, ci,
        scan);
    assertEquals(ROWSIZE, rowCount);
  }


  /**

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    scan.setStopRow(ROWS[2]);


    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long rowCount = -1;
    try {
      rowCount = aClient.rowCount(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
      myLog.error("Exception thrown in the invalidRange method"
          + e.getStackTrace());
    }
    assertEquals(-1, rowCount);

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