PgFunctionFileParser cannot parse multi-word IN type

[benedeki]

Describe the bug

PgFunctionFileParser cannot parse multi-word IN type

To Reproduce

Steps to reproduce the behavior OR commands run:

1. Create a function source file with IN param_name TIMESTAMP WITH TIME ZONE
2. Try to read the file into the DBAppModel
3. See error

Expected behavior

File is loaded and parameter type recognized.