For help:

         sqlt-diff -h|--help

       For a list of all valid parsers:

         sqlt -l|--list

       To diff two schemas:

         sqlt-diff [options] file_name1=parser file_name2=parser


         -d|--debug   Show debugging info

       sqlt-diff is a utility for creating a file of SQL commands necessary to
       transform the first schema provided to the second.  While not yet
       exhaustive in its ability to mutate the entire schema, it will report
       the following

       o   New tables

           Using the Producer class of the target (second) schema, any tables
           missing in the first schema will be generated in their entirety
           (fields, constraints, indices).

       o   Missing/altered fields

           Any fields missing or altered between the two schemas will be
           reported as:

             ALTER TABLE <table_name>
               [DROP <field_name>]
               [CHANGE <field_name> <datatype> (<size>)] ;

       o   Missing/altered indices

           Any indices missing or of a different type or on different fields
           will be indicated.  Indices that should be dropped will be reported
           as such:

             DROP INDEX <index_name> ON <table_name> ;

           An index of a different type or on different fields will be
           reported as a new index as such:

             CREATE [<index_type>] INDEX [<index_name>] ON <table_name>
               ( <field_name>[,<field_name>] ) ;

       "ALTER/DROP TABLE" and "CREATE INDEX" statements are not generated by
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