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From Pedro Boado <pbo...@apache.org>
Subject Re: column mapping schema decoding
Date Wed, 26 Dec 2018 23:00:20 GMT
Hi,

Column mapping is stored in SYSTEM.CATALOG table . There is only one column
mapping strategy with between 1 to 4 bytes to be used to represent column
number. Regardless of encoded column size, column name lookup strategy
remains the same.

Hope it helps,

Pedro.



On Wed, 26 Dec 2018, 23:00 Shawn Li <shawnlijob@gmail.com wrote:

> Hi,
>
> Phoenix 4.10 introduced column mapping feature. There are four types of
> mapping schema (https://phoenix.apache.org/columnencoding.html). Is there
> any documentation that shows how to encode/map string column name in
> Phoenix to number column qualifier in Hbase?
>
> We are using Lily Hbase indexer to do the batch indexing. So if the column
> qualifier is number. We need find a way to decode it back to the original
> String column name.
>
> Thanks,
> Shawn
>

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