For readability. Backpatch to 16.
Author: Erik Wienhold <ewie@ewie.name>
Discussion: https://postgr.es/m/
8ddac732-d650-4958-b9c9-
ea8e6116251e@ewie.name
which specifies the data type returned. It must be one of <type>json</type>,
<type>jsonb</type>, <type>bytea</type>, a character string type (<type>text</type>,
<type>char</type>, or <type>varchar</type>), or a type
- for which there is a cast from <type>json</type> to that type.
+ that can be cast to <type>json</type>.
By default, the <type>json</type> type is returned.
</para>