http://abloz.com date:2012.7.4

將hbase shell的timestamp轉為可讀。下面的示例將-ROOT-表的列info:serverstartcode的timestamp和value轉成可讀格式。

hbase(main):001:0> scan '-ROOT-'
ROW                        COLUMN+CELL
 .META.,,1                 column=info:regioninfo, timestamp=1340249081981, value={NAME => '.META.,,
                           1', STARTKEY => '', ENDKEY => '', ENCODED => 1028785192,}
 .META.,,1                 column=info:server, timestamp=1341304672637, value=Hadoop46:60020
 .META.,,1                 column=info:serverstartcode, timestamp=1341304672637, value=1341301228326
 .META.,,1                 column=info:v, timestamp=1340249081981, value=x00x00
1 row(s) in 1.3230 seconds

hbase(main):002:0> import java.util.Date
=> Java::JavaUtil::Date
hbase(main):003:0> Date.new(1341304672637).toString()
=> "Tue Jul 03 16:37:52 CST 2012"
hbase(main):004:0> Date.new(1341301228326).toString()
=> "Tue Jul 03 15:40:28 CST 2012"
 

在shell中，如果有可讀日期，能否轉成long型別呢？

hbase(main):005:0> import java.text.SimpleDateFormat
=> Java::JavaText::SimpleDateFormat
hbase(main):006:0> import java.text.ParsePosition
=> Java::JavaText::ParsePosition

hbase(main):015:0> SimpleDateFormat.new("yy/MM/dd").parse("12/07/03",ParsePosition.new(0)).getTime()
=> 1341244800000
 

參考 http://abloz.com/hbase/book.html

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