Along the lines of keeping function parameters on a single line, SQL Complete also needs to have some control over the treatment of arithmetic operators. For example:

SELECT
c1 + c2
/ c3 as Calculation
FROM t;

most formatting packages will format by default as:

SELECT
c1 + c2 / c3 as Calculation
FROM t;

Some of the more advanced packages will be able to specify what to do before/after each operator (usually whether to add a newline) but at the very least SQL Complete needs to be able to "gather" a calculation onto a single line.