\df jsonb_populate_record
List of functions
Schema | Name | Result data type | Argument data
types | Type
------------+-----------------------+------------------+---------------------+------
pg_catalog | jsonb_populate_record | anyelement | anyelement,
jsonb | func
(1 row)
manual:
> anyelement Indicates that a function accepts any data type.
> For the “simple” family of polymorphic types, the matching and deduction
> rules work like this:
> Each position (either argument or return value) declared as anyelement is
> allowed to have any specific actual data type, but in any given call they
> must all be the same actual type.
So jsonb_populate_record signature can handle cases like
jsonb_populate_record(anyarray, jsonb)? obviously this is a cast, it
may fail.
also if input is anyarray, so the output anyarray will have the same
base type as input anyarray.
