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Niels Basjes commented on HBASE-11990: -------------------------------------- I could use some help here. I'm working on a different implementation of Scan to include a method {code}public Scan addRowPrefixFilter(byte [] rowPrefix){code} How do I create a sensible Unit test for this? In hbase-client I cannot use the HBaseTestingUtility because that is part of hbase-server and hbase-server depends on hbase-client. I haven't been able to find anything else yet other than external things like this https://gist.github.com/agaoglu/613217 What is the correct way to do this? > Make setting the start and stop row for a specific prefix easier > ---------------------------------------------------------------- > > Key: HBASE-11990 > URL: https://issues.apache.org/jira/browse/HBASE-11990 > Project: HBase > Issue Type: New Feature > Components: Client > Reporter: Niels Basjes > Attachments: 11990v4.txt, HBASE-11990-20140916-v2.patch, > HBASE-11990-20140916-v3.patch, HBASE-11990-20140916-v5.patch, > HBASE-11990-20140916-v6.patch, HBASE-11990-20140916.patch, > HBASE-11990-20140917-v7.patch > > > If you want to set a scan from your application to scan for a specific row > prefix this is actually quite hard. > As described in several places you can set the startRow to the prefix; yet > the stopRow should be set to the prefix '+1' > If the prefix 'ASCII' put into a byte[] then this is easy because you can > simply increment the last byte of the array. > But if your application uses real binary rowids you may run into the scenario > that your prefix is something like > {code}{ 0x12, 0x23, 0xFF, 0xFF }{code} Then the increment should be {code}{ > 0x12, 0x24 }{code} > I have prepared a proposed patch that makes setting these values correctly a > lot easier. -- This message was sent by Atlassian JIRA (v6.3.4#6332)