Re: DB migration : Sybase to Postgres

Thanks Ron.

While enabling the constraint (valid constraint) after initial data import,
will it scan all the table data or the validation will happen for new rows
inserted after that point)?

On Thu, May 25, 2023 at 6:40 PM Ron <ronljohnsonjr(at)gmail(dot)com> wrote:

> If I read your email correctly, I see two options
> - Apply FK constraints *after* initial data load.
> - Load parent data before child data
>
> (You can create the FKs ahead of time, but use the NOT VALID clause; then,
> after data is loaded do ALTER TABLE ... VALIDATE CONSTRAINT.)
>
> On 5/25/23 06:30, Sengottaiyan T wrote:
>
> Is there an option to set novalidate constraints in postgres? In my source
> Sybase DB, table structures are not defined properly (only primary keys
> exist and no foreign key) - I'm making necessary changes on target Postgres
> DB (created tables, identifying relationship between table columns with
> respective team). After creating proper structure on target, the next step
> is to load data - I'm sure there will be a lot of errors during initial
> data load (no parent record found). How to handle it?
>
> On Tue, Mar 28, 2023 at 3:22 PM Sengottaiyan T <techsenko(at)gmail(dot)com>
> wrote:
>
>> Team,
>>
>> Need some help regarding Open Source tools for DB migration (from SYBASE
>> to PostgreSQL) with real time CDC. Along with this, is there any
>> possibility to migrate other objects (like Triggers, Stored Procedures and
>> Functions) to PostgreSQL?
>>
>> Thanks,
>> Senko
>>
>
> --
> Born in Arizona, moved to Babylonia.
>