PostgreSQL operator returns query result

[ghost]

closes: #15010

Right now this operator is not able to return any query result.
It should be allowed to do so in order to use them to retrieve useful data and use it in the following nodes

[ashb]

👍🏻

Please add some unit tests too.

[marcosmarxm]

The DBApiHook run doesn't return anything.
Reading the documentation:

Runs a command or a list of commands. Pass a list of sql
       statements to the sql parameter to get them to execute
       sequentially

you can send a list of sql statements to run, how do you proceed with this?
Maybe some logic using the function get_records could be better...

This look a very nice use with the TaskFlow API. Others users must know about this. Please, if possible add example and improve documentation to demonstrate to others.

[ghost]

Hi @marcosmarxm

The DBApiHook run doesn't return anything

Method overriding in Python is perfectly fine with different return types when using inheritance. I guess that the fact that Python does not support overloading helps to prevent these issues.

you can send a list of sql statements to run, how do you proceed with this?

I'll make some tests and I'll get back to you.

Thank you for the feedback

[github-actions]

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