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Breaking change with cx_Oracle 7.0: DML RETURNING statements now return a list #405

BradJensen opened this issue Nov 15, 2018 · 0 comments


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BradJensen commented Nov 15, 2018

With cx_Oracle 7.0, DML RETURNING statements now return a list instead of a scalar. I suspect all statements in Pony using RETURNING INTO are affected, but I specifically encountered entities with an auto generated PK fail in pony.orm.core._save_created_ at line 4943, raising TypeError: unhashable type: 'list'


@sashaaero sashaaero added the bug label Dec 9, 2018
kozlovsky added a commit that referenced this issue Jan 17, 2019
# Major features

* Array type support for PostgreSQL and SQLite
* isinstance() support in queries
* Support of queries based on collections: select(x for x in y.items)

# Other features

* Support of**kwargs)
* Support of SKIP LOCKED option in 'SELECT ... FOR UPDATE'
* New function make_proxy(obj) to make cros-db_session proxy objects
* Specify ON DELETE CASCADE/SET NULL in foreign keys
* Support of LIMIT in `SELECT FROM (SELECT ...)` type of queries
* Support for negative JSON array indexes in SQLite

# Improvements

* Improved query prefetching: use fewer number of SQL queries
* Memory optimization: deduplication of values recieved from the database in the same session
* increase DBAPIProvider.max_params_count value

# Bugfixes

* #405: breaking change with cx_Oracle 7.0: DML RETURNING now returns a list
* #380: db_session should work with async functions
* #385: test fails with python3.6
* #386: release unlocked lock error in SQLite
* #390: TypeError: writable buffers are not hashable
* #398: add auto coversion of numpy numeric types
* #404: GAE local run detection
* Fix Flask compatibility: add support of LocalProxy object
* db_session(sql_debug=True) should log SQL commands also during db_session.__exit__()
* Fix duplicated table join in FROM clause
* Fix accessing global variables from hybrid methods and properties
* Fix m2m collection loading bug
* Fix composite index bug:
* Fix MyEntity[obj.get_pk()] if pk is composite
* MySQL group_concat_max_len option set to max of 32bit platforms to avoid truncation
* Show all attribute options in show(Entity) call
* For nested db_session retry option should be ignored
* Fix py_json_unwrap
* Other minor fixes
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