hbase-ruby.shell.commands.delete.rb Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of hbase-sdk-shell_1.2 Show documentation
The newest version!
#
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#

module Shell
  module Commands
    class Delete < Command
      def help
        return <<-EOF
Put a delete cell value at specified table/row/column and optionally
timestamp coordinates.  Deletes must match the deleted cell's
coordinates exactly.  When scanning, a delete cell suppresses older
versions. To delete a cell from  't1' at row 'r1' under column 'c1'
marked with the time 'ts1', do:

  hbase> delete 'ns1:t1', 'r1', 'c1', ts1
  hbase> delete 't1', 'r1', 'c1', ts1
  hbase> delete 't1', 'r1', 'c1', ts1, {VISIBILITY=>'PRIVATE|SECRET'}

The same command can also be run on a table reference. Suppose you had a reference
t to table 't1', the corresponding command would be:

  hbase> t.delete 'r1', 'c1',  ts1
  hbase> t.delete 'r1', 'c1',  ts1, {VISIBILITY=>'PRIVATE|SECRET'}
EOF
      end

      def command(table, row, column,
      				timestamp = org.apache.hadoop.hbase.HConstants::LATEST_TIMESTAMP, args = {})
        delete(table(table), row, column, timestamp, args)
      end

      def delete(table, row, column,
      				timestamp = org.apache.hadoop.hbase.HConstants::LATEST_TIMESTAMP, args = {})
        format_simple_command do
          table._delete_internal(row, column, timestamp, args, false)
        end
      end
    end
  end
end

#Add the method table.delete that calls delete.delete
::Hbase::Table.add_shell_command("delete")