[jira] Created: (HBASE-1837) Fix results contract (If row has no results, return null, if Result has no results return null or empty Sets and Arrays?)

["stack (JIRA)" <ji...@apache.org>]

Fix results contract (If row has no results, return null, if Result has no results return null or empty Sets and Arrays?)
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                 Key: HBASE-1837
                 URL: https://issues.apache.org/jira/browse/HBASE-1837
             Project: Hadoop HBase
          Issue Type: Task
            Reporter: stack
             Fix For: 0.21.0


Make sure we are consistent regards results contract.  As jgray says:
{code}
17:47 < jgray> decisions are things like, if the result is empty do we return nulls or do we return empty 
               lists/0-length arrays
17:47 < jgray> if result is empty, do we return null for row?
17:47 < jgray> and if row is the null row, we then return zero-length byte[0]
17:48 < St^Ack_> So, if row is empty, we return null (I believe)
17:48 < jgray> yes
17:49 < St^Ack_> If you have a result, up to this, if empty, it would not return null stuff.
17:49 < jgray> no it did return null stuff
17:49 < jgray> at least many of them did
17:49 < St^Ack_> oh.. ok.
17:49 < jgray> but then my result delayed deserialization broke that on one case
17:49 < St^Ack_> I thought I'd added it w/ 1836?
17:49 < jgray> yeah u fixed what i broke, i think
17:50 < jgray> but we should nail down the contract, specify what it is in javadoc, and add unit tests to verify such
...
{code}

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