I'm experiencing a similar problem already discussed here () which didn't offer a solution.
I can successfully connect to the PostgreSQL DB but as soon as I try to open schemata / tables / etc. an error window pops up saying "ERROR: syntax error at or near ""CATALOG_NAME"" Position: 31 Vendor code 0".
I tried all kinds of different combinations on Windows and Linux:
SQL Developer version: 4.1.2.20.64
Oracle JDK: 1.8.0_51, 32bit, Windows 7 (also tried 1.8.0_60, 64bit, SLES10)
PostgreSQL JDBC driver: postgresql-9.4-1205.jdbc42.jar (also tried jdbc3, jdbc4, jdbc41)
PostgreSQL Server: 8.1.23-0.11.1, 64bit, SLES10
One person (@"jmarton") seemed to get it working. Otherwise I could only find answers that the listing won't work (i.e. http://stackoverflow.com/a/28671213/3375325). Would be great if someone could help with or fix this issue. I can provide debug logs if I'm told how to produce them!