Re: remaining sql/json patches - Mailing list pgsql-hackers

Op 9/18/23 om 05:15 schreef Amit Langote:
> On Sun, Sep 17, 2023 at 3:34 PM Erik Rijkers <er@xs4all.nl> wrote:
>> Op 9/14/23 om 10:14 schreef Amit Langote:
>>>
>>>
>>
>> Hi Amit,
>>
>> Just now I built a v14-patched server and I found this crash:
>>
>> select json_query(jsonb '
>> {
>>     "arr": [
>>       {"arr": [2,3]}
>>     , {"arr": [4,5]}
>>     ]
>> }'
>>     , '$.arr[*].arr ? (@ <= 3)' returning anyarray  WITH WRAPPER) --crash
>> ;
>> server closed the connection unexpectedly
>>          This probably means the server terminated abnormally
>>          before or while processing the request.
>> connection to server was lost
> 
> Thanks for the report.
> 
> Attached updated version fixes the crash, but you get an error as is
> to be expected:
> 
> select json_query(jsonb '
> {
>     "arr": [
>       {"arr": [2,3]}
>     , {"arr": [4,5]}
>     ]
> }'
>     , '$.arr[*].arr ? (@ <= 3)' returning anyarray  WITH WRAPPER);
> ERROR:  cannot accept a value of type anyarray
> 
> unlike when using int[]:
> 
> select json_query(jsonb '
> {
>     "arr": [
>       {"arr": [2,3]}
>     , {"arr": [4,5]}
>     ]
> }'
>     , '$.arr[*].arr ? (@ <= 3)' returning int[]  WITH WRAPPER);
>   json_query
> ------------
>   {2,3}
> (1 row)
> 

Thanks, Amit. Alas, there are more: for 'anyarray' I thought I'd 
substitute 'interval', 'int4range', 'int8range', and sure enough they 
all give similar crashes. Patched with v15:

psql -qX -e << SQL
select json_query(jsonb'{"a":[{"a":[2,3]},{"a":[4,5]}]}',
   '$.a[*].a?(@<=3)'returning int[] with wrapper --ok
);

select json_query(jsonb'{"a": [{"a": [2,3]}, {"a": [4,5]}]}',
   '$.a[*].a?(@<=3)'returning interval  with wrapper --crash
--'$.a[*].a?(@<=3)'returning int4range with wrapper --crash
--'$.a[*].a?(@<=3)'returning int8range with wrapper --crash
--'$.a[*].a?(@<=3)'returning numeric[] with wrapper --{2,3} =ok
--'$.a[*].a?(@<=3)'returning anyarray  with wrapper --fixed
--'$.a[*].a?(@<=3)'returning anyarray           --null =ok
--'$.a[*].a?(@<=3)'returning int                --null =ok
--'$.a[*].a?(@<=3)'returning int   with wrapper --error =ok
--'$.a[*].a?(@<=3)'returning int[] with wrapper -- {2,3} =ok
);
SQL
=> server closed the connection unexpectedly, etc

Because those first three tries gave a crash (*all three*), I'm a bit 
worried there may be many more.

I am sorry to be bothering you with these somewhat idiotic SQL 
statements but I suppose somehow it needs to be made more solid.

Thanks!

Erik