id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
28859	Oracle OCI library hides NO_DATA_FOUND exception from database with Oracle backend.	Jani Tiainen	Mariusz Felisiak	"Attached minimal project to demonstrate the problem.

Traceback from Django:
{{{
Traceback (most recent call last):
  File ""/home/jtiai/projects/django-oracle-bug/django_oracle_bug/django_oracle_bug/tests.py"", line 6, in test_trigger_failure
    obj = MyModel.objects.create()
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/manager.py"", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/query.py"", line 394, in create
    obj.save(force_insert=True, using=self.db)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/base.py"", line 808, in save
    force_update=force_update, update_fields=update_fields)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/base.py"", line 838, in save_base
    updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/base.py"", line 924, in _save_table
    result = self._do_insert(cls._base_manager, using, fields, update_pk, raw)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/base.py"", line 963, in _do_insert
    using=using, raw=raw)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/manager.py"", line 85, in manager_method
    return getattr(self.get_queryset(), name)(*args, **kwargs)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/query.py"", line 1076, in _insert
    return query.get_compiler(using=using).execute_sql(return_id)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/models/sql/compiler.py"", line 1114, in execute_sql
    return self.connection.ops.fetch_returned_insert_id(cursor)
  File ""/home/jtiai/.pyenv/versions/django-oracle-bug/lib/python3.6/site-packages/django/db/backends/oracle/operations.py"", line 245, in fetch_returned_insert_id
    return int(cursor._insert_id_var.getvalue())
TypeError: int() argument must be a string, a bytes-like object or a number, not 'NoneType'
}}}

Real error that happend:
{{{
ORA-01403: no data found
ORA-06512: at ""ORA_TEST.TG_FAILING"", line 4
ORA-04088: error during execution of trigger 'ORA_TEST.TG_FAILING'
}}}"	Bug	closed	Database layer (models, ORM)	dev	Normal	fixed	oracle		Ready for checkin	1	0	0	0	0	0