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From "Xuesen Liang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-15432) TableInputFormat - support multiple column families scan
Date Sat, 17 Dec 2016 01:13:58 GMT

    [ https://issues.apache.org/jira/browse/HBASE-15432?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15755980#comment-15755980
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Xuesen Liang commented on HBASE-15432:
--------------------------------------

Yes, the space is intentional. It's for testing that if user write whitespace, it still work
fine.

Both "=a,   b" and "=a,b" are fine.


> 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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