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 30408,CheckConstraint with lookup using LIKE & % crash on Oracle and PostgreSQL.,David Sanders,Simon Charette,"Given the following model: {{{ class Foo(models.Model): bar = models.CharField(max_length=255) class Meta: constraints = ( models.CheckConstraint( check=models.Q(bar__startswith='BAR'), name='check_bar_starts_with_BAR', ), ) }}} Running migrate with PostgreSQL will result in an exception: {{{ davids ~/projects/test_startswith_constraint $ ./manage.py migrate Operations to perform: Apply all migrations: admin, auth, contenttypes, sample, sessions Running migrations: Applying contenttypes.0001_initial... OK Applying auth.0001_initial... OK Applying admin.0001_initial... OK Applying admin.0002_logentry_remove_auto_add... OK Applying admin.0003_logentry_add_action_flag_choices... OK Applying contenttypes.0002_remove_content_type_name... OK Applying auth.0002_alter_permission_name_max_length... OK Applying auth.0003_alter_user_email_max_length... OK Applying auth.0004_alter_user_username_opts... OK Applying auth.0005_alter_user_last_login_null... OK Applying auth.0006_require_contenttypes_0002... OK Applying auth.0007_alter_validators_add_error_messages... OK Applying auth.0008_alter_user_username_max_length... OK Applying auth.0009_alter_user_last_name_max_length... OK Applying auth.0010_alter_group_name_max_length... OK Applying auth.0011_update_proxy_permissions... OK Applying sample.0001_initial...Traceback (most recent call last): File ""./manage.py"", line 21, in main() File ""./manage.py"", line 17, in main execute_from_command_line(sys.argv) File ""/Users/davids/src/django/django/core/management/__init__.py"", line 381, in execute_from_command_line utility.execute() File ""/Users/davids/src/django/django/core/management/__init__.py"", line 375, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File ""/Users/davids/src/django/django/core/management/base.py"", line 323, in run_from_argv self.execute(*args, **cmd_options) File ""/Users/davids/src/django/django/core/management/base.py"", line 364, in execute output = self.handle(*args, **options) File ""/Users/davids/src/django/django/core/management/base.py"", line 83, in wrapped res = handle_func(*args, **kwargs) File ""/Users/davids/src/django/django/core/management/commands/migrate.py"", line 233, in handle fake_initial=fake_initial, File ""/Users/davids/src/django/django/db/migrations/executor.py"", line 117, in migrate state = self._migrate_all_forwards(state, plan, full_plan, fake=fake, fake_initial=fake_initial) File ""/Users/davids/src/django/django/db/migrations/executor.py"", line 147, in _migrate_all_forwards state = self.apply_migration(state, migration, fake=fake, fake_initial=fake_initial) File ""/Users/davids/src/django/django/db/migrations/executor.py"", line 245, in apply_migration state = migration.apply(state, schema_editor) File ""/Users/davids/src/django/django/db/migrations/migration.py"", line 124, in apply operation.database_forwards(self.app_label, schema_editor, old_state, project_state) File ""/Users/davids/src/django/django/db/migrations/operations/models.py"", line 827, in database_forwards schema_editor.add_constraint(model, self.constraint) File ""/Users/davids/src/django/django/db/backends/base/schema.py"", line 346, in add_constraint self.execute(sql) File ""/Users/davids/src/django/django/db/backends/base/schema.py"", line 138, in execute cursor.execute(sql, params) File ""/Users/davids/src/django/django/db/backends/utils.py"", line 99, in execute return super().execute(sql, params) File ""/Users/davids/src/django/django/db/backends/utils.py"", line 67, in execute return self._execute_with_wrappers(sql, params, many=False, executor=self._execute) File ""/Users/davids/src/django/django/db/backends/utils.py"", line 76, in _execute_with_wrappers return executor(sql, params, many, context) File ""/Users/davids/src/django/django/db/backends/utils.py"", line 84, in _execute return self.cursor.execute(sql, params) IndexError: tuple index out of range }}} This is due to the SQL being passed to `execute()` has an unescaped `%`: {{{ > /Users/davids/src/django/django/db/backends/utils.py(85)_execute() 84 import ipdb; ipdb.set_trace() ---> 85 return self.cursor.execute(sql, params) 86 ipdb> sql 'ALTER TABLE ""sample_foo"" ADD CONSTRAINT ""check_bar_starts_with_BAR"" CHECK (""bar""::text LIKE \'BAR%\')' }}} Note that this runs fine with SQLite but is problematic for PostgreSQL.",Bug,closed,"Database layer (models, ORM)",2.2,Release blocker,fixed,,Ian Foote,Ready for checkin,1,0,0,0,0,0