[COMMITTERS] pgsql: Disallow invalid path elements in jsonb_set

Disallow invalid path elements in jsonb_set Null path elements and, where the object is an array, invalid integer elements now cause an error. Incorrect behaviour noted by Thom Brown, patch from Dmitry Dolgov. Backpatch to 9.5 where jsonb_set was introduced Branch -- REL9_5_STABLE Details

[COMMITTERS] pgsql: Disallow invalid path elements in jsonb_set

Disallow invalid path elements in jsonb_set Null path elements and, where the object is an array, invalid integer elements now cause an error. Incorrect behaviour noted by Thom Brown, patch from Dmitry Dolgov. Backpatch to 9.5 where jsonb_set was introduced Branch -- master Details ---