I am new with Bash, and I am extending a script made by third parts.
In the following code snippet:
while IFS='|' read my_var
do
(
# commands based on $my_var
) &
done < <(psql my_db "SELECT ...")
I do not undertstand what < < does.
If < < were <, I would say the snippet would do:
run the
SELECT...query onmy_db.take the result of the query ( a string of elements separated by
|) and store time by time each element inmy_var.run in parallel the commands inside every while loop, using each time a different value for
my_var.
Is this correct?
How does having < < instead of < change things ?
