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https://issues.apache.org/jira/browse/HBASE-2071?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Kyle Purtell closed HBASE-2071.
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> Order matters when adding columns to a scan, using some of the add column
> methods.
> ----------------------------------------------------------------------------------
>
> Key: HBASE-2071
> URL: https://issues.apache.org/jira/browse/HBASE-2071
> Project: HBase
> Issue Type: Bug
> Components: Client
> Affects Versions: 0.20.2
> Environment: Calling the Java API, using Clojure 1.1 alpha. Client
> machine is a Mac OSX 10.6, using HBase server in non-distributed mode
> (locally).
> Reporter: Kyle Oba
> Priority: Minor
>
> When adding columns to a Scan, using "addColumns" or "addColumn" (with single
> argument) the order in which they are added matters. When adding columns as
> distinct family and qualifier (2 arguments) this is not a problem. It is
> only a problem when adding as a single argument.
> For example:
> user> (scan "t1" {:columns [ "f1:" "f1:hello" ] })
> cols are: [f1: f1:hello]
> col: f1: --
> col: f1:hello -- world
> user> (scan "t1" {:columns [ "f1:hello" "f1:" ] })
> cols are: [f1:hello f1:]
> col: f1:hello -- world
> col: f1: -- v1
> In the first call to "scan," the arguments are in lexicographic order, and
> this results in the value associated with "f1" to be left out. In the second
> call to "scan," the arguments are in reverse order, and the results are valid.
> Sorry the example is in Clojure. In essence, this is what's happending:
> This doesn't work:
> myScan.addColumn("f1:")
> myScan.addColumn("f1:hello")
> This works:
> myScan.addColumn("f1:hello")
> myScan.addColumn("f1:")
> I have omitted the code which creates a scanner with this scan, returns the
> results, and then prints them.
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