This is an extension on top of all existing SQL. The pipe functions more or less as a unix pipe. There is no reordering, but the user selects the order. The core syntax is simply:

  query | operator

Which results in a new query that can be piped again. So e.g. this would be valid too:

  SELECT id,a,b FROM  table WHERE id>1
  |WHERE id < 10

Personally, I can see this fix so much SQL pain.