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Fixed #12328 -- Corrected the handling of subqueries with ordering and slicing, especially when used in delete subqueries. Thanks to Walter Doekes for the report.

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This fixes a feature that isn't available under MySQL and Oracle (Refs #10099).

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12912 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Russell Keith-Magee 2010-04-04 17:05:43 +00:00
parent f92d73fbd4
commit 82efb48403
6 changed files with 58 additions and 12 deletions
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8
django/db/models/sql/compiler.py
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@ -120,13 +120,15 @@ class SQLCompiler(object):
"""
Perform the same functionality as the as_sql() method, returning an
SQL string and parameters. However, the alias prefixes are bumped
beforehand (in a copy -- the current query isn't changed) and any
ordering is removed.
beforehand (in a copy -- the current query isn't changed), and any
ordering is removed if the query is unsliced.
Used when nesting this query inside another.
"""
obj = self.query.clone()
obj.clear_ordering(True)
if obj.low_mark == 0 and obj.high_mark is None:
# If there is no slicing in use, then we can safely drop all ordering
obj.clear_ordering(True)
obj.bump_prefix()
return obj.get_compiler(connection=self.connection).as_sql()