f3df379599
Closes-Bug: 1263081 Closes-Bug: 1262837 Change-Id: I635c0767df792c5980ad345fe2714aae046060f3
59 lines
1.9 KiB
Python
59 lines
1.9 KiB
Python
# Copyright 2012 Hewlett-Packard Development Company, L.P.
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#
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# Author: Kiall Mac Innes <kiall@hp.com>
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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from sqlalchemy.ext.compiler import compiles
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from sqlalchemy.sql.expression import Executable, ClauseElement
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class InsertFromSelect(Executable, ClauseElement):
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execution_options = \
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Executable._execution_options.union({'autocommit': True})
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def __init__(self, table, select, columns=None):
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self.table = table
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self.select = select
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self.columns = columns
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@compiles(InsertFromSelect)
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def visit_insert_from_select(element, compiler, **kw):
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# NOTE(kiall): SQLA 0.8.3+ has an InsertFromSelect built in:
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# sqlalchemy.sql.expression.Insert.from_select
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# This code can be removed once we require 0.8.3+
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table = compiler.process(element.table, asfrom=True)
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select = compiler.process(element.select)
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if element.columns is not None:
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columns = [compiler.preparer.format_column(c) for c in element.columns]
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columns = ", ".join(columns)
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return "INSERT INTO %s (%s) %s" % (
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table,
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columns,
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select
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)
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else:
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return "INSERT INTO %s %s" % (
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table,
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select
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)
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# # Dialect specific compilation example, should it be needed.
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# @compiles(InsertFromSelect, 'postgresql')
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# def visit_insert_from_select(element, compiler, **kw):
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# ...
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