From 3b803714c5a8de41efd5b15571773e4f3027807d Mon Sep 17 00:00:00 2001
From: Michael Stack <stack@apache.org>
Date: Wed, 29 Oct 2008 18:01:35 +0000
Subject: [PATCH] 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  |  1 +
 bin/HBase.rb | 15 +++++++++++++++
 bin/hirb.rb  |  6 ++++++
 3 files changed, 22 insertions(+)

diff --git a/CHANGES.txt b/CHANGES.txt
index 5e0c5beda2c..922e83b14b8 100644
--- a/CHANGES.txt
+++ b/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]
diff --git a/bin/HBase.rb b/bin/HBase.rb
index 6097c352905..f19ff43b731 100644
--- a/bin/HBase.rb
+++ b/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 
diff --git a/bin/hirb.rb b/bin/hirb.rb
index fa0100734f9..2c8a7721adc 100644
--- a/bin/hirb.rb
+++ b/bin/hirb.rb
@@ -190,6 +190,8 @@ HBASE SHELL COMMANDS:
            hbase> scan '.META.', {COLUMNS => 'info:regioninfo'}
            hbase> scan 't1', {COLUMNS => ['c1', 'c2'], LIMIT => 10, \\
              STARTROW => 'xyz'}
+
+ truncate  Disables, drops and recreates the specified table.
            
  version   Output this HBase version
 
@@ -264,6 +266,10 @@ end
 def exists(table)
   admin().exists(table)
 end
+
+def truncate(table)
+  admin().truncate(table)
+end
   
 # CRUD