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# SQLBase7-SA
SQLBase7-SA is a SQLAlchemy driver/dialect for the Centura SQLBase
database, specifically version 7.5.1.
## About the Project
From what I can tell, SQLBase is still an actively-developed database,
but it is no longer owned by Centura (see
[here](http://en.wikipedia.org/wiki/Gupta_Technologies)). Also, the
current version (according to [this
page](http://www.unify.com/Products/Data_Management/SQLBase/), as of
25 Apr 2010) is 11.5, so I have no idea how useful this project will
be for versions of SQLBase more recent than 7.5.1.
This project exists only for the sake of providing read-only access to
legacy data, specifically that used by the
[CAM32](http://www.camcommerce.com/products/CAM32.aspx) Point of Sale
software. It's possible that it could allow writing data, etc., but I
personally won't be adding any such features unless/until the need
arises.
I don't expect there to be much of anyone using SQLBase 7.5.1 at this
point (besides perhaps other CAM32 users), but if you do happen to
need additional functionality from this project or just have questions
or comments, feel free to drop me a line at lance@edbob.org.
## Downloads
The code is released under the [GNU General Public
License](http://www.gnu.org/licenses/gpl.html), version 3.
It is available at [PyPI](http://pypi.python.org/pypi/SQLBase7-SA), so
the easiest way to get the package is with the command:
# pip install SQLBase7-SA
Again, this project is extremely specific to my needs, so I'm only
building eggs for Python 2.5 and 2.6 at this point. If you happen to
need something else then please contact me.
Copyright © 2010 Lance Edgar <lance@edbob.org>

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@ -35,7 +35,7 @@ setup(
version = __version__,
author = 'Lance Edgar',
author_email = 'lance@edbob.org',
url = "https://forgejo.wuttaproject.org/rattail/sqlbase7-sa",
url = "http://sqlbase7-sa.edbob.org/",
license = "GNU GPL v3",
description = 'SQLAlchemy dialect for Centura SQLBase v7',
long_description = """

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@ -23,4 +23,4 @@
################################################################################
__version__ = '0.1b5'
__version__ = '0.1b3'

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from sqlalchemy.engine.default import DefaultDialect
from sqlalchemy import types, and_
from sqlalchemy.sql.expression import Join
from sqlalchemy.sql import visitors, operators, ClauseElement
import sqlalchemy
@ -57,12 +56,7 @@ class SQLBase7Compiler(CompilerBase):
return self.process(join.left, **kwargs) + ", " + self.process(join.right, **kwargs)
def visit_select(self, select, **kwargs):
if self.stack and 'from' in self.stack[-1]:
existingfroms = self.stack[-1]['from']
else:
existingfroms = None
froms = select._get_display_froms(existingfroms)
froms = select._get_display_froms()
whereclause = self._get_join_whereclause(froms)
if whereclause is not None:
select = select.where(whereclause)
@ -77,16 +71,7 @@ class SQLBase7Compiler(CompilerBase):
clauses = []
def visit_join(join):
if join.isouter:
def visit_binary(binary):
if binary.operator == operators.eq:
if binary.left.table is join.right:
binary.left = _OuterJoinColumn(binary.left)
elif binary.right.table is join.right:
binary.right = _OuterJoinColumn(binary.right)
clauses.append(visitors.cloned_traverse(join.onclause, {}, {'binary':visit_binary}))
else:
clauses.append(join.onclause)
clauses.append(join.onclause)
for j in join.left, join.right:
if isinstance(j, Join):
visit_join(j)
@ -99,16 +84,6 @@ class SQLBase7Compiler(CompilerBase):
return and_(*clauses)
return None
def visit_outer_join_column(self, vc):
return self.process(vc.column) + "(+)"
class _OuterJoinColumn(ClauseElement):
__visit_name__ = 'outer_join_column'
def __init__(self, column):
self.column = column
class SQLBase7Dialect(DefaultDialect):