tab completion for "alter extension foobar update" yields a list of
tables. That is actively misleading. (This is not new in 9.6.)
It should complete to nothing, or "TO" followed by a list of available versions.
The attached patch takes approach 2. I thought of adding a ";" to the
list completions to signify you can optionally end the command
immediately after UPDATE and have it be a complete command. But I
thought perhaps that was too clever, and unprecedented.
Will add to commitfest-next
Cheers,
Jeff
