Re: Is this a bug? Deleting a column deletes the constraint.

* Tom Lane:

> The CREATE TABLE reference page further amplifies:
>
>   PostgreSQL allows a table of no columns to be created (for example,
>   CREATE TABLE foo();). This is an extension from the SQL standard, which
>   does not allow zero-column tables. Zero-column tables are not in
>   themselves very useful, but disallowing them creates odd special cases
>   for ALTER TABLE DROP COLUMN, so it seems cleaner to ignore this spec
>   restriction.

And you need the syntax for table partitioning.

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