Re: Best practice to move from MySQL to PostgreSQL

Guenther Boelter, 02.12.2010 05:04:
> so a query looks like this
>
> SELECT BelegNummer, BelegDatum FROM rechnungen ORDER BY BelegDatum ASC;
>
> This will not work with PostgreSQL, because PostgreSQL will change all fieldnames to lowercase, right?
> Means, I've to change all fieldnames to lowercase like belegnummer, belegdatum ....

No you don't need to change the statements - at least not if they *don't* use doubles quotes.

As long as you don't use double quotes, the names are not case-sensitive (as required by the standard)
So just make sure you don't quote your table and column names and you should be fine.

The following statements are equivalent:

SELECT BELEGNUMMER FROM RECHNUNGEN
select belegnummer from rechnungen
SELECT belegnummer FROM rechnungen
SELECT BeLeGnUmMer FROM rechnungen
...

> Should I change my queries to something like this:
>
>> SELECT belegnummer, belegdatum FROM rechnungen ORDER BY belegdatum ASC;
No need to do that.

Regards
Thomas