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Fixed #7628 -- Oracle backend won't try to recreate existing sequence…

…s during syncdb. Thanks, cmarshal.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@8522 bcc190cf-cafb-0310-a4f2-bffc1f526a37
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commit 6b5a607606a0589b9571634f82e8d5bbba0e1dfc 1 parent fbf09ee
@mboersma mboersma authored
Showing with 17 additions and 3 deletions.
  1. +17 −3 django/db/backends/oracle/base.py
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20 django/db/backends/oracle/base.py
@@ -26,12 +26,14 @@
DatabaseError = Database.Error
IntegrityError = Database.IntegrityError
+
class DatabaseFeatures(BaseDatabaseFeatures):
empty_fetchmany_value = ()
needs_datetime_string_cast = False
uses_custom_query_class = True
interprets_empty_strings_as_nulls = True
+
class DatabaseOperations(BaseDatabaseOperations):
def autoinc_sql(self, table, column):
# To simulate auto-incrementing primary keys in Oracle, we have to
@@ -40,7 +42,17 @@ def autoinc_sql(self, table, column):
tr_name = get_trigger_name(table)
tbl_name = self.quote_name(table)
col_name = self.quote_name(column)
- sequence_sql = 'CREATE SEQUENCE %s;' % sq_name
+ sequence_sql = """
+ DECLARE
+ i INTEGER;
+ BEGIN
+ SELECT COUNT(*) INTO i FROM USER_CATALOG
+ WHERE TABLE_NAME = '%(sq_name)s' AND TABLE_TYPE = 'SEQUENCE';
+ IF i = 0 THEN
+ EXECUTE IMMEDIATE 'CREATE SEQUENCE %(sq_name)s';
+ END IF;
+ END;
+ /""" % locals()
trigger_sql = """
CREATE OR REPLACE TRIGGER %(tr_name)s
BEFORE INSERT ON %(tbl_name)s
@@ -195,7 +207,7 @@ def year_lookup_bounds_for_date_field(self, value):
class DatabaseWrapper(BaseDatabaseWrapper):
-
+
operators = {
'exact': '= %s',
'iexact': '= UPPER(%s)',
@@ -212,7 +224,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
}
oracle_version = None
- def __init__(self, *args, **kwargs):
+ def __init__(self, *args, **kwargs):
super(DatabaseWrapper, self).__init__(*args, **kwargs)
self.features = DatabaseFeatures()
@@ -265,6 +277,7 @@ def _cursor(self, settings):
cursor.arraysize = 100
return cursor
+
class OracleParam(object):
"""
Wrapper object for formatting parameters for Oracle. If the string
@@ -285,6 +298,7 @@ def __init__(self, param, charset, strings_only=False):
else:
self.input_size = None
+
class FormatStylePlaceholderCursor(Database.Cursor):
"""
Django uses "format" (e.g. '%s') style placeholders, but Oracle uses ":var"
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