[HBASE-6244] [REST] Result generators do not need to query table schema

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.92.2, 0.94.1, 0.95.2
• Fix Version/s: 0.94.1, 0.95.0
• Component/s: REST
• Assignee: Andrew Kyle Purtell
• Reporter: ShiXing
• Created: 20/Jun/12 15:16
• Updated: 26/Feb/13 08:15
• Resolved: 20/Jun/12 21:16

Description

Now, the RowResultGenerator and the ScanerResultGenerator will fit the column family if the request doesn't contain any column info.

      if (rowspec.hasColumns()) {
        //addColumn for get or scan
      } else {
        for (HColumnDescriptor family: 
            table.getTableDescriptor().getFamilies()) {
          scan/get.addFamily(family.getName());
        }
      }

The table.getTableDescriptor() will cost 10+ milliseconds in our hbase cluster each request. We can remove these code because the server will auto add the columns.