Scalar query and parallel query

If you have a scalar query in the select list, the whole query will not work in parallel mode even if you give a parallel hint

(Unix/Linux Shell) How many lines in a file?

Linux (FC6)

wc -l tx.txt | cut -f 1 -d " "

Solaris

wc -l tx.txt | sed -e 's/^ *//' | cut -f 1 -d " "
OR
wc -l txt.txt | awk '{print $1}'