Re: Jsonb transform for pl/python

On 28.03.2018 15:43, Peter Eisentraut wrote:

> On 3/21/18 18:50, Peter Eisentraut wrote:
>> On 3/12/18 11:26, Nikita Glukhov wrote:
>>> I have reviewed this patch. Attached new 6th version of the patch with
>>> v5-v6 delta-patch.
>> Thanks for the update. I'm working on committing this.
> Committed.
>
> Everything seemed to work well. I just did a bit of cosmetic cleanups.
> I did a fair amount of tweaking on the naming of functions, the
> extensions and library names, etc., to make it look like the existing
> plpython transforms. I also changed it so that the transform would
> support mappings and sequences other than dict and list. I removed the
> non-ASCII test and the test with the huge numbers.

I found a memory leak in PLySequence_ToJsonbValue():
PyObject returned from PySequence_GetItem() is not released.

A bug can be easily reproduced using function roudtrip() from regression test:
SELECT roundtrip('[1,2,3]'::jsonb) FROM generate_series(1, 1000000);

Similar code in PLyMapping_ToJsonbValue() seems to be correct because
PyList_GetItem() and PyTuple_GetItem() return a borrowed reference.

Patch with fix is attached.

--
Nikita Glukhov
Postgres Professional: http://www.postgrespro.com
The Russian Postgres Company