SQLAlchemy mangles identifiers that have dollar signs in them; in
particular, the regular expression in ANSICompiler.after_compile()
that searches a statement for positional parameters will take a
parameter like
:foo$bar
and only snatch the "foo" out of it, instead of "foo$bar". The error
that results is rather obscure, since the fact that the positional
parameters now contain "foo" while the "bind" list contains "foo$bar"
does not cause an error until the session is flushed and it attempts
to run the SQL statements; the error looks something like:
File ".../sqlalchemy/sql.py", line 845, in get_processed
bind = self.binds[key]
KeyError: 'foo'
A patch that corrects the bug is attached.
--
Brandon Craig Rhodes [EMAIL PROTECTED] http://rhodesmill.org/brandon
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--- ./sqlalchemy/ansisql.py.orig 2007-08-09 11:54:06.000000000 -0400
+++ ./sqlalchemy/ansisql.py 2007-08-09 11:53:37.000000000 -0400
@@ -170,7 +170,7 @@
# this re will search for params like :param
# it has a negative lookbehind for an extra ':' so that it doesnt match
# postgres '::text' tokens
- match = re.compile(r'(?<!:):([\w_]+)', re.UNICODE)
+ match = re.compile(r'(?<!:):([\w_$]+)', re.UNICODE)
if self.paramstyle=='pyformat':
self.strings[self.statement] = match.sub(lambda m:'%(' + m.group(1) +')s', self.strings[self.statement])
elif self.positional:
