column alignment in sqlplus mode--how?

[f geisler]

How can I assure columns align in the *SQL* buffer?

When displaying a table in my *SQL* (sql-oracle) buffer, column
alignment is often a problem. The column format is set, and aligns
correctly in a non-emacs window. I presume the problem is related to
tabulation, although a simple replace with spaces did not help.

Thanks in advance for you help.