Within Oracle SQL Developer (3.2.10.09), Oracle SQL Developer used to auto-complete column names when I was composing my SQL Script. This function doesn't seem to work any more. Did a setting somewhere in Preferences get messed up??? Any help would be greatly appreciated and Thanks in advance for your review and am hopeful for a reply.
There is no preference affecting your experience. Autocompletion is tightly coupled with parsing. I suspect your script confuses parser, which can be confirmed if column completion of individual statement is OK. If this is the case, then it's a bug.
There is an 'autocomplete' preference you can disable. Check Preferences > Code Editor > Completion Insight. Are the first 2 checkboxes enabled?
If disabled you can invoke the code completion feature with ctrl+spacebar