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Code Issues 32 Releases Wiki Activity

boulder-oracle-sprint: Fixed fixtures_regress test case by implementing

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get_sql_sequence_reset() in the Oracle backend.  Thanks, Ian Kelly.


git-svn-id: http://code.djangoproject.com/svn/django/branches/boulder-oracle-sprint@4995 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Boulder Sprinters 2007-04-10 23:41:54 +00:00
parent 0b57189aa2
commit f44429224a
1 changed files with 28 additions and 2 deletions
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30
django/db/backends/oracle/base.py
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@ -225,8 +225,34 @@ def get_sequence_name(table):
def get_sql_sequence_reset(style, model_list):
"Returns a list of the SQL statements to reset sequences for the given models."
# TODO: Run ALTER statements to reset Oracle sequence w/out dropping it.
return []
from django.db import models
output = []
query = """
DECLARE
startvalue integer;
cval integer;
BEGIN
SELECT NVL(MAX(id), 0) INTO startvalue FROM %(table)s;
SELECT %(sequence)s.nextval INTO cval FROM dual;
cval := startvalue - cval;
IF cval != 0 THEN
EXECUTE IMMEDIATE 'ALTER SEQUENCE %(sequence)s MINVALUE 0 INCREMENT BY '||cval;
SELECT %(sequence)s.nextval INTO cval FROM dual;
EXECUTE IMMEDIATE 'ALTER SEQUENCE %(sequence)s INCREMENT BY 1';
END IF;
END; """
for model in model_list:
for f in model._meta.fields:
if isinstance(f, models.AutoField):
sequence_name = get_sequence_name(model._meta.db_table)
query1 = query % {'sequence':sequence_name, 'table':model._meta.db_table}
output.append(query1)
break # Only one AutoField is allowed per model, so don't bother continuing.
for f in model._meta.many_to_many:
sequence_name = get_sequence_name(f.m2m_db_table())
query2 = query % {'sequence':sequence_name, 'table':f.m2m_db_table()}
output.append(query2)
return output
def get_trigger_name(table):
name_length = get_max_name_length() - 3