Parse filename's contents and creates a Batch object which contains all the
Statement objects created while parsing (one object per SQL statement).
filename's contents are parsed and Statement objects are created as long as
no error is found. If an error is found at some point, then the parsing stops, error may be set and null is
returned
if sql is null, then the returned Batch object will contain no
statement.
| this |
a SqlParser object |
| filename |
name of the file to parse |
|
a new Batch object, or |