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https://issues.apache.org/jira/browse/PHOENIX-6343?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17273519#comment-17273519
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ASF GitHub Bot commented on PHOENIX-6343:
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virajjasani commented on pull request #1118:
URL: https://github.com/apache/phoenix/pull/1118#issuecomment-769003852
Nice points.
> Do we store the PK field(s) in actual cell, or are they only present in
the rowkey ?
For user created tables, their pk (and non-pk) columns are actually rowkeys
in SYSTEM.CATALOG. The cells represent specific properties like `DATA_TYPE`,
`NULLABLE` etc.
> What happens when you specify a CF for a PK field ? is it even valid ?
I think we can't specify CF for PK. We have this special Exception for it:
`PRIMARY_KEY_WITH_FAMILY_NAME`
Based on some unit tests written very initially, it seems we do allow
creating same column name (with user defined columnFamily) as Pk column name,
but that is the very reason why the same would apply to default columnFamily
and hence, any user created table can have Pk and non-Pk column names same.
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> Phoenix allows duplicate column names when one of them is a primary key
> -----------------------------------------------------------------------
>
> Key: PHOENIX-6343
> URL: https://issues.apache.org/jira/browse/PHOENIX-6343
> Project: Phoenix
> Issue Type: Bug
> Components: core
> Affects Versions: 5.0.0, 4.15.0
> Reporter: Istvan Toth
> Assignee: Viraj Jasani
> Priority: Major
> Fix For: 5.1.0, 4.16.1, 4.17.0
>
>
> {code:sql}
> CREATE TABLE IF NOT EXISTS test_duplicate_columns (
> name VARCHAR NOT NULL PRIMARY KEY,
> city VARCHAR, name VARCHAR);
> {code}
> {noformat}
> select * from test_duplicate_columns;
> +------+------+------+
> | NAME | CITY | NAME |
> +------+------+------+
> +------+------+------+
> No rows selected (0.015 seconds)
> {noformat}
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