commit ac4daee248b4bb0cb658c83437e4a9d93c6dce2d
author Hyoseong Kim <muzbit.kim@lge.com> Mon Mar 04 20:02:47 2013 +0900
committer git-lg-database.lge.com <lg-database@lge.com> Mon Apr 01 15:55:55 2013 +0900
tree 05150367de93552334d06c05e313150ebdba6ccc
parent f5276c16ad97d94f8773938012ae54f8c7ba450a

Add additional Method that check whether a table is empty or not

Application Devleopers are using queryNumEntries API
implemented by "COUNT(*)" to check whether a table is empty or not.
COUNT(*)  has to process the entire table to compute the result.
But, "EXISTS" can stop after a single matching row has been found.
So, Using "EXISTS" is more faster than "COUNT(*)"
I added new API using "EXISTS" to check whether a table is empty or not

Change-Id: Idcc2633d0a5349c59f41e125cf34c9dc6622cdbe