You just created a new function and want to execute it but postgresql delivers an error <function name> does not exist
You probably used the execute command followed by your functionname to execute your function. This does not work. To execute a function you use the select command. e.g.
This will do the job.
About the Author
Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux in different European countries and different European languages. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform where he is one of the most important contributors and the main developer.