do not change type of `json` columns in `INSERT ... SELECT ...`
do not change type of `json` columns in `INSERT ... SELECT ...`

The cast to `jsonb` was benign on pg 9.5 but there doesn't seem to be
an implicit cast back to `json` in older pg 9.4

ini-bdds/ermrest,informatics-isi-edu/ermrest,informatics-isi-edu/ermrest,ini-bdds/ermrest