def __init__(self, sql, all_fields=None):
self.tokens = sql_parser.parseString(sql) if isinstance(sql, basestring) else sql
self.column_classes = None
self._table_subquery = None
self._all_fields = all_fields
self._idx = {}
self._parts = self._generate_parts()
def _query(self, sql):
tokens = sql_parser.parseString(sql)
all_fields = []
if tokens.columns == '*':
usePrefix = len(tokens.tables) > 1
for t in tokens.tables:
columns = sql_columns(self.conns[0], t[0])
if usePrefix:
columns = ["%s.%s"%(t[0],c) for c in columns]
all_fields.extend(columns)
return DbShardsQuery(sql, all_fields), all_fields
