Re: "could not determine data type of parameter" with timestamp

On Tue, Dec 5, 2017 at 8:11 AM, Rémi Aubel <remi.aubel@gmail.com> wrote:

Hello,

I know my problem has already been answered in this list (https://www.postgresql.org/message-id/CA%2BxsaB0EMDaNek0Oky9c17_8UX3-epWVP11%2BvTNgrAPoY2s9FA%40mail.gmail.com), but it was a long time ago and I would like to know if any other solution exists now.

​Not that I am aware.​

 

But this workaround is not really useful for me, because my application uses generated (dynamic) queries and targets multiple database types (not only PosgreSQL). So, when I know the targeted database, I do not know my parameter types anymore.

​I'd probably perform the null test in Java and pass the true/false boolean result along to the query:

SELECT * FROM my_table WHERE ?::bool;

ps.setBoolean(1, tsvar = null); //my Java is rusty but you get the idea.

That should work in any database.

David J.

​