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From: Christoph Moench-Tegeder <[email protected]>
To: David Barbour <[email protected]>
Cc: [email protected]
Subject: Re: Oracle to Postgres - Transform Hash Partition
Date: Thu, 6 Jun 2024 20:41:40 +0200
Message-ID: <[email protected]> (raw)
In-Reply-To: <CAEMHB2R1VA09f22WbBOJz5YE6WLC7aK7HYwo7UXSWdyqN5bmpw@mail.gmail.com>
References: <CAEMHB2R1VA09f22WbBOJz5YE6WLC7aK7HYwo7UXSWdyqN5bmpw@mail.gmail.com>

## David Barbour ([email protected]):

> Now I need to 'attach' the original table.  The problem I'm running into is
> there are no good examples of how to define the values.

The syntax is the same as with CREATE TABLE ... PARTITION OF, e.g.
ALTER TABLE parent ATTACH TABLE part FOR VALUES WITH (MODULUS m, REMAINDER r);

> Here's an example:
>  alter table idev.assessment_result_2023_dab_part
> attach partition idev.assessment_result_2023_dab for values with(modulus 8,
> remainder 1) to (modulus 8, remainder 7)

There's only one (modulus, remainder) tuple in the partition bound
definition for hash partitions, and always only one partition bound
specification per partition.
Maybe what you actually want is a DEFAULT partition (specified as
PARTITION OF parent DEFAULT), or maybe a completely different approach?

Regards,
Christoph

-- 
Spare Space.

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