Coverage for python/lsst/daf/butler/core/views.py : 41%

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# This file is part of daf_butler. # # Developed for the LSST Data Management System. # This product includes software developed by the LSST Project # (http://www.lsst.org). # See the COPYRIGHT file at the top-level directory of this distribution # for details of code ownership. # # This program is free software: you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation, either version 3 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program. If not, see <http://www.gnu.org/licenses/>.
self.name = name self.selectable = selectable
self.name = name
def compileCreateView(element, compiler, **kw): return "CREATE VIEW IF NOT EXISTS %s AS %s" % (element.name, compiler.sql_compiler.process(element.selectable))
def compileDropView(element, compiler, **kw): return "DROP VIEW %s" % (element.name)
"""Make a SQL view.
Parameters ---------- name : `str` Name of the view table. metadata : `sqlalchemy.Metadata` Metadata to attach the view to. selectable : `sqlalchemy.sql.select` or `str` The SQL ``SELECT`` clause used to generate the view. comment : `str`, optional Text description of the view. Unlike the comment attribute of actual `sqlalchemy.schema.SchemaItem` instances, this comment is not currently used when creating the view, but it may be in the future. info : `dict`, optional Arbitrary extra information describing the view. """
super().__init__(name) self.comment = comment self.info = info
if isinstance(selectable, str): selectable = select([text(selectable.lstrip("SELECT"))])
for c in selectable.c: c._make_proxy(self)
@event.listens_for(MetaData, "after_create") def receive_after_create(target, connection, **kwargs): connection.execute(CreateView(name, selectable))
@event.listens_for(MetaData, "before_drop") def receive_before_drop(target, connection, **kwargs): connection.execute(DropView(name)) |