The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/9.6/static/sql-insert.html
Description:
When using the RETURNING extension on the INSERT function when nested, does
not propagate the return value up, and causes a syntax error on the "INTO"
keyword, this is because the RETURNING extension is also expecting in "INTO"
key word, which isn't mentioned anywhere in the documentation?