What does it means if the TNS_Names directory is empty in Preferences GUI of SQL Developer?

CodePudding user response：

It just means that there is no tnsnames.ora file for SQL Developer to use, so you can't use TNS entries when defining connections.

It won't stop you defining other connection types - 'Basic', 'Custom JDBC' etc. - you just won't be able to use 'TNS' as there won't be any options to pick from in the 'Network alias' drop-down; and if you're previously picked one and then removed the tnsnames.ora then it won't be recognised any more.