Limited support for stored procedure – PB Docs 2019

PostgreSQL stored procedure is not fully supported, for example,
PostgreSQL stored procedure with parameters cannot be used as the data
source for DataWindow objects. When using PostgreSQL stored procedure as
the data source for DataWindow objects, make sure to set the
StripParmNames connection parameter to Yes (or select the “strip
parameter names” option in the syntax section of the database profile
setup). PostgreSQL stored procedure syntax cannot be previewed in the
Database Painter or the DataWindow data source.