Examples of org.apache.hadoop.hbase.client.Delete

org.apache.hadoop.hbase.client.Delete
Used to perform Delete operations on a single row.
To delete an entire row, instantiate a Delete object with the row to delete. To further define the scope of what to delete, perform additional methods as outlined below.
To delete specific families, execute {@link #deleteFamily(byte[]) deleteFamily}for each family to delete.
To delete multiple versions of specific columns, execute {@link #deleteColumns(byte[],byte[]) deleteColumns}for each column to delete.
To delete specific versions of specific columns, execute {@link #deleteColumn(byte[],byte[],long) deleteColumn}for each column version to delete.
Specifying timestamps, deleteFamily and deleteColumns will delete all versions with a timestamp less than or equal to that passed. If no timestamp is specified, an entry is added with a timestamp of 'now' where 'now' is the servers's System.currentTimeMillis(). Specifying a timestamp to the deleteColumn method will delete versions only with a timestamp equal to that specified. If no timestamp is passed to deleteColumn, internally, it figures the most recent cell's timestamp and adds a delete at that timestamp; i.e. it deletes the most recently added cell.
The timestamp passed to the constructor is used ONLY for delete of rows. For anything less -- a deleteColumn, deleteColumns or deleteFamily -- then you need to use the method overrides that take a timestamp. The constructor timestamp is not referenced.

    byte [] rowA = Bytes.toBytes("rowA");
    byte [] rowB = Bytes.toBytes("rowB");


    byte [] value = Bytes.toBytes("value");


    Delete delete = new Delete(rowA);
    delete.deleteFamily(fam1);


    region.delete(delete, null, true);


    // now create data.
    Put put = new Put(rowA);

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  }


  public void testDeleteColumns_PostInsert() throws IOException,
      InterruptedException {
    Delete delete = new Delete(row);
    delete.deleteColumns(fam1, qual1);
    doTestDelete_AndPostInsert(delete);
  }

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    delete.deleteColumns(fam1, qual1);
    doTestDelete_AndPostInsert(delete);
  }


  public void testDeleteFamily_PostInsert() throws IOException, InterruptedException {
    Delete delete = new Delete(row);
    delete.deleteFamily(fam1);
    doTestDelete_AndPostInsert(delete);
  }

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    put.add(family, qual1, 1L, Bytes.toBytes(1L));
    region.put(put);


    region.flushcache();


    Delete delete = new Delete(Bytes.toBytes(1L), 1L, null);
    //delete.deleteColumn(family, qual1);
    region.delete(delete, null, true);


    put = new Put(Bytes.toBytes(2L));
    put.add(family, qual1, 2L, Bytes.toBytes(2L));

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    if (LOG.isDebugEnabled()) {
      LOG.debug(split.getRegionNameAsString() + "/" + split.getEncodedName()
          + " no longer has references to " + Bytes.toStringBinary(parent));
    }
    
    Delete delete = new Delete(parent);
    delete.deleteColumns(splitFamily, splitQualifier);
    srvr.delete(metaRegionName, delete);
    
    return result;
  }

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   * @throws IOException
   */
  public static void removeRegionFromMETA(final HRegionInterface srvr,
    final byte [] metaRegionName, final byte [] regionName)
  throws IOException {
    Delete delete = new Delete(regionName);
    delete.deleteFamily(HConstants.CATALOG_FAMILY);
    srvr.delete(metaRegionName, delete);
  }

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   * @throws IOException
   */
  public static void cleanRegionInMETA(final HRegionInterface srvr,
    final byte [] metaRegionName, final HRegionInfo info)
  throws IOException {
    Delete del = new Delete(info.getRegionName());
    del.deleteColumns(CATALOG_FAMILY, SERVER_QUALIFIER);
    del.deleteColumns(CATALOG_FAMILY, STARTCODE_QUALIFIER);
    srvr.delete(metaRegionName, del);
  }

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      // Update meta table
      Put put = updateRegionInfo(i);
      server.put(m.getRegionName(), put);
      Delete delete = new Delete(i.getRegionName());
      delete.deleteColumns(CATALOG_FAMILY, SERVER_QUALIFIER);
      delete.deleteColumns(CATALOG_FAMILY, STARTCODE_QUALIFIER);
      server.delete(m.getRegionName(), delete);
      if (LOG.isDebugEnabled()) {
        LOG.debug("Removed server and startcode from row and set online=" +
          this.online + ": " + i.getRegionNameAsString());
      }

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      this.region.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]);
      this.region.delete(d, null, false);
    }    
    for(byte [] ROW : ROWS_TWO) {
      Delete d = new Delete(ROW);
      d.deleteColumns(FAMILIES[0], QUALIFIERS_TWO[1]);
      d.deleteColumns(FAMILIES[1], QUALIFIERS_TWO[1]);
      this.region.delete(d, null, false);
    }
    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);
      this.region.delete(d, null, false);
    }
    for(byte [] QUALIFIER : QUALIFIERS_TWO) {
      Delete d = new Delete(ROWS_TWO[1]);
      d.deleteColumns(FAMILIES[0], QUALIFIER);
      d.deleteColumns(FAMILIES[1], QUALIFIER);
      this.region.delete(d, null, false);
    }
    numRows -= 2;
  }

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              }
            }
            region.put(put);
            if (val > 0 && val % 47 == 0){
              //System.out.println("put iteration = " + val);
              Delete delete = new Delete(row, (long)val-30, null);
              region.delete(delete, null, true);
            }
            val++;
          }
        } catch (IOException e) {

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