cannot pass the value of a variable to a request

[igorLayneks]

Hello. I use PostgreSQL and i have a problems.
doesn't see variables @startdate, @enddate (pic1_1)
also, when you click get all columns, an error pops up (pic1_2)

[Lech Kulikowski]

Hello,

Without a sample with test data that reproduces the issue, it is difficult to say something.

Thank you.