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

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

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

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

org.apache.hadoop.hbase.client.coprocessor.AggregationClient.min()
It gives the minimum value of a column for a given column family for the given range. In case qualifier is null, a min of all values for the given family is returned. @param tableName @param ci @param scan @return min val @throws Throwable

    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(HConstants.EMPTY_START_ROW);
    scan.setStopRow(HConstants.EMPTY_END_ROW);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    BigDecimal min = aClient.min(TEST_TABLE, ci, scan);
    assertEquals(new BigDecimal("0.00"), min);
  }


  /**
   * @throws Throwable

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    BigDecimal min = aClient.min(TEST_TABLE, ci, scan);
    assertEquals(new BigDecimal("5.00"), min);
  }


  @Test
  public void testMinWithValidRangeWithNoCQ() throws Throwable {

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    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(HConstants.EMPTY_START_ROW);
    scan.setStopRow(HConstants.EMPTY_END_ROW);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    BigDecimal min = aClient.min(TEST_TABLE, ci, scan);
    assertEquals(new BigDecimal("0.00"), min);
  }


  @Test
  public void testMinWithValidRange2WithNoCQ() throws Throwable {

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    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[7]);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    BigDecimal min = aClient.min(TEST_TABLE, ci, scan);
    assertEquals(new BigDecimal("0.60"), min);
  }


  @Test
  public void testMinWithValidRangeWithNullCF() {

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    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    BigDecimal min = null;
    try {
      min = aClient.min(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
    }
    assertEquals(null, min);// CP will throw an IOException about the
    // null column family, and max will be set to 0
  }

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    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(ROWS[4]);
    scan.setStopRow(ROWS[2]);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    try {
      min = aClient.min(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
    }
    assertEquals(null, min);// control should go to the catch block
  }

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    scan.setStartRow(ROWS[6]);
    scan.setStopRow(ROWS[6]);
    final ColumnInterpreter<BigDecimal, BigDecimal> ci = new BigDecimalColumnInterpreter();
    BigDecimal min = null;
    try {
      min = aClient.min(TEST_TABLE, ci, scan);
    } catch (Throwable e) {
    }
    assertEquals(null, min);// control should go to the catch block
  }

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(HConstants.EMPTY_START_ROW);
    scan.setStopRow(HConstants.EMPTY_END_ROW);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    Long min = aClient.min(TEST_TABLE, ci,
        scan);
    assertEquals(0l, min.longValue());
  }


  /**

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    Scan scan = new Scan();
    scan.addColumn(TEST_FAMILY, TEST_QUALIFIER);
    scan.setStartRow(ROWS[5]);
    scan.setStopRow(ROWS[15]);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long min = aClient.min(TEST_TABLE, ci, scan);
    assertEquals(5, min);
  }


  @Test
  public void testMinWithValidRangeWithNoCQ() throws Throwable {

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    Scan scan = new Scan();
    scan.addFamily(TEST_FAMILY);
    scan.setStartRow(HConstants.EMPTY_START_ROW);
    scan.setStopRow(HConstants.EMPTY_END_ROW);
    final ColumnInterpreter<Long, Long> ci = new LongColumnInterpreter();
    long min = aClient.min(TEST_TABLE, ci,
        scan);
    assertEquals(0, min);
  }


  @Test

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