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https://issues.apache.org/jira/browse/PHOENIX-2896?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16489134#comment-16489134
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Thomas D'Silva commented on PHOENIX-2896:
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[~samarthjain] from an eariler comment on this Jira you said that we need to
use a single counter so that we can guarantee that column qualifiers are unique
across all the column families for mutable tables (which is required by
EncodedColumnQualifierCellsList where each column qualifier maps to an index in
the array). But looking at the code it looks like we have a counter per column
family. So we could have a two columns from different column families that
have the same column qualifier.
> Support encoded column qualifiers per column family
> ----------------------------------------------------
>
> Key: PHOENIX-2896
> URL: https://issues.apache.org/jira/browse/PHOENIX-2896
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Thomas D'Silva
> Assignee: Samarth Jain
> Priority: Major
> Fix For: 4.10.0
>
>
> This allows us to reduce the number of null values in the stored array that
> contains all columns for a give column family for the
> COLUMNS_STORED_IN_SINGLE_CELL Storage Scheme.
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