HBASE-817 Hbase/Shell Truncate

git-svn-id: https://svn.apache.org/repos/asf/hadoop/hbase/trunk@708966 13f79535-47bb-0310-9956-ffa450edef68

CHANGES.txt

@@ -81,6 +81,7 @@ Release 0.19.0 - Unreleased
                (Sishen Freecity via Stack)
    HBASE-960   REST interface: more generic column family configure and also
                get Rows using offset and limit (Sishen Freecity via Stack)
+   HBASE-817   Hbase/Shell Truncate
     
   NEW FEATURES
    HBASE-875   Use MurmurHash instead of JenkinsHash [in bloomfilters]

bin/HBase.rb

@@ -104,6 +104,21 @@ module HBase
       @formatter.footer(now)
     end
 
+    def truncate(tableName)
+      now = Time.now
+      @formatter.header()
+      hTable = HTable.new(tableName)
+      tableDescription = hTable.getTableDescriptor()
+      puts 'Truncating ' + tableName + '; it may take a while'
+      puts 'Disabling table...'
+      disable(tableName)
+      puts 'Dropping table...'
+      drop(tableName)
+      puts 'Creating table...'
+      @admin.createTable(tableDescription)
+      @formatter.footer(now)
+    end
+
     # Pass tablename and an array of Hashes
     def create(tableName, args)
       now = Time.now 

bin/hirb.rb

@@ -191,6 +191,8 @@ HBASE SHELL COMMANDS:
            hbase> scan 't1', {COLUMNS => ['c1', 'c2'], LIMIT => 10, \\
              STARTROW => 'xyz'}
 
+ truncate  Disables, drops and recreates the specified table.
+           
  version   Output this HBase version
 
 GENERAL NOTES:
@@ -265,6 +267,10 @@ def exists(table)
   admin().exists(table)
 end
 
+def truncate(table)
+  admin().truncate(table)
+end
+  
 # CRUD
   
 def get(table, row, args = {})