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Posted to issues@hbase.apache.org by "Elliot Miller (Jira)" <ji...@apache.org> on 2020/08/18 19:14:00 UTC

[jira] [Created] (HBASE-24901) Create versatile hbase-shell table formatter

Elliot Miller created HBASE-24901:
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             Summary: Create versatile hbase-shell table formatter
                 Key: HBASE-24901
                 URL: https://issues.apache.org/jira/browse/HBASE-24901
             Project: HBase
          Issue Type: Improvement
          Components: shell
    Affects Versions: 3.0.0-alpha-1
            Reporter: Elliot Miller
            Assignee: Elliot Miller


As a user, I would like a simple interface for shell output that can be expressed as a table (ie. output with a fixed number of columns and potentially many rows). To be clear, this new formatter is not specifically for HBase "tables." Table is used in the broader sense here.

Goals
- Do not require more than one output cell loaded in memory at a time
- Support many implementations like aligned human-friendly tables, unaligned delimited, and JSON

Non-goals
- Don't load all the headers into memory at once.
  - This may seem like a goal with merit, but we are unlikely to find a use case for this
    formatter with many columns. For example: since HBase tables aren't relational, our scan
    output will not have an output column for every HBase column. Instead, each output row
    will correspond to an HBase cell.



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