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, throws 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 null if an error occurred |