everywhere:
TRSimple: replaces the TRQualified
Iden
App name
AggregateApp name
WindowApp name
operator names (not sure if this is used in ansi sql)
explicit table
function in from clause
support collate postfix operator
support escape and uescape as postfix operators
change the collate support in substring and trim which isn't a special
case in the sql 2003 grammar anymore but just a normal collate postfix
operator, the old code had the collation name as a string, but the
new style is as an identifier
