def query(self):
"""The Query that defines the view."""
if not self.exists():
return None
self._table._load_info()
if 'view' in self._table._info and 'query' in self._table._info['view']:
return _query.Query(self._table._info['view']['query'], context=self._context)
return None
def __init__(self, name, context=None):
"""Initializes an instance of a View object.
Args:
name: the name of the view either as a string or a 3-part tuple
(projectid, datasetid, name). If a string, it must have the form
'<project>:<dataset>.<view>' or '<dataset>.<view>'.
context: an optional Context object providing project_id and credentials. If a specific
project id or credentials are unspecified, the default ones configured at the global
level are used.
Raises:
Exception if the name is invalid.
"""
if context is None:
context = gcp.Context.default()
self._context = context
self._table = _table.Table(name, context=context)
self._materialization = _query.Query('SELECT * FROM %s' % self._repr_sql_(), context=context)