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Fixed #9136: Do slicing in Oracle with rownum instead of row_number() for a speed improvement. Thanks, Guillaume Taglang.
git-svn-id: http://code.djangoproject.com/svn/django/trunk@9235 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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@ -111,9 +111,10 @@ def query_class(QueryClass, Database):
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# Wrap the base query in an outer SELECT * with boundaries on
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# the "_RN" column. This is the canonical way to emulate LIMIT
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# and OFFSET on Oracle.
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sql = 'SELECT * FROM (SELECT ROW_NUMBER() OVER (ORDER BY 1) AS "_RN", "_SUB".* FROM (%s) "_SUB") WHERE "_RN" > %d' % (sql, self.low_mark)
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high_where = ''
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if self.high_mark is not None:
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sql = '%s AND "_RN" <= %d' % (sql, self.high_mark)
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high_where = 'WHERE ROWNUM <= %d' % (self.high_mark,)
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sql = 'SELECT * FROM (SELECT ROWNUM AS "_RN", "_SUB".* FROM (%s) "_SUB" %s) WHERE "_RN" > %d' % (sql, high_where, self.low_mark)
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return sql, params
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