sql-oracle-scan-on

sql-oracle-scan-on is a variable defined in `sql.el'.
Its value is

t

Documentation:
Non-nil if placeholders should be replaced in Oracle SQLi.

When non-nil, Emacs will scan text sent to sqlplus and prompt
for replacement text for & placeholders as sqlplus does. This
is needed on Windows where SQL*Plus output is buffered and the
prompts are not shown until after the text is entered.

You need to issue the following command in SQL*Plus to be safe:

SET DEFINE OFF

In older versions of SQL*Plus, this was the SET SCAN OFF command.

You can customize this variable.

This variable was introduced, or its default value was changed, in version 24.1 of Emacs.