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https://issues.apache.org/jira/browse/HBASE-15432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15756021#comment-15756021
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Xuesen Liang commented on HBASE-15432:
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Succeed with command line {code}"-D hbase.mapreduce.scan.column.family=a,\ b
tableA /output_dir ; "{code}
but failed with {code}"-D hbase.mapreduce.scan.column.family=a, b tableA
/output_dir ; "{code}
> TableInputFormat - support multiple column families scan
> --------------------------------------------------------
>
> Key: HBASE-15432
> URL: https://issues.apache.org/jira/browse/HBASE-15432
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 2.0.0, 0.98.16, 0.98.16.1
> Reporter: nirav patel
> Assignee: Xuesen Liang
> Fix For: 2.0.0
>
> Attachments: HBASE-15432.master.002.patch,
> HBASE-15432.master.003.patch, HBASE-15432.master.patch
>
>
> Currently Hbase TableInputFormat class has SCAN_COLUMN_FAMILY and
> SCAN_COLUMNS. SCAN_COLUMN_FAMILY can only scan single column family. If we
> need to scan multiple column families from a table then we must use
> SCAN_COLUMNS where we must provide both columns and column families which is
> not a convenient. Can we have a SCAN_COLUMN_FAMILIES which supports scan of
> multiple column families.
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