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Re: Adding an extra boolean column to "information_schema.columns"or "pg_attribute" - Mailing list pgsql-general

From Karsten Hilbert
Subject Re: Adding an extra boolean column to "information_schema.columns"or "pg_attribute"
Date
Msg-id 20171230192310.GF5732@hermes.hilbert.loc
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In response to Adding an extra boolean column to "information_schema.columns" or "pg_attribute"  (GPT <gptmailinglists@gmail.com>)
Responses Re: Adding an extra boolean column to "information_schema.columns" or "pg_attribute"
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On Sat, Dec 30, 2017 at 08:17:34PM +0100, GPT wrote:

> I would like to add an extra boolean attribute to table columns,
> something like NULL. Unfortunately Pg does not support such a feature:
> 
> ADD ATTRIBUTE <attribute_name> TYPE <type_of_attribute> TO COLUMN
> <schema.table.column_name>;
...
> I have already been suggested to use VIEW or dynamic SQL but I am
> looking something different.

Can you explain why ?

One thing that comes to mind is complex user types.

Or columns of type table.

Karsten
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