sqlalchemy can't recognize type int64 #808
Description
Affected tables: blobs, files, ref_commits.
Gitbase: v0.20.0-rc1
2019-05-01 17:47:56,146:INFO:root:Database.get_sqla_engine(). Masked URL: mysql://root:XXXXXXXXXX@gitbase:3306/gitbase
/usr/local/lib/python3.6/site-packages/sqlalchemy/dialects/mysql/reflection.py:193: SAWarning: Did not recognize type 'int64' of column 'blob_size'
"Did not recognize type '%s' of column '%s'" % (type_, name)
2019-05-01 17:47:56,339:ERROR:root:Unrecognized data type in blobs.blob_size
2019-05-01 17:47:56,340:ERROR:root:Can't generate DDL for NullType(); did you forget to specify a type on this Column?
Traceback (most recent call last):
File "/home/superset/superset/connectors/sqla/models.py", line 870, in fetch_metadata
datatype = col.type.compile(dialect=db_dialect).upper()
File "/usr/local/lib/python3.6/site-packages/sqlalchemy/sql/type_api.py", line 580, in compile
return dialect.type_compiler.process(self)
File "/usr/local/lib/python3.6/site-packages/sqlalchemy/sql/compiler.py", line 400, in process
return type_._compiler_dispatch(self, **kw)
File "/usr/local/lib/python3.6/site-packages/sqlalchemy/sql/visitors.py", line 91, in _compiler_dispatch
return meth(self, **kw)
File "/usr/local/lib/python3.6/site-packages/sqlalchemy/sql/compiler.py", line 3350, in visit_null
"type on this Column?" % type_
sqlalchemy.exc.CompileError: Can't generate DDL for NullType(); did you forget to specify a type on this Column?