Paste this into a new question or an answer at dba.stackexchange.com:
<!-- --> > select '{"v": 300e715100}'::jsonb > > <pre> > ERROR: value overflows numeric format LINE 1: select '{&quot;v&quot;: 300e715100}'::jsonb ^ > </pre> <!-- --> > select '{"v": 300e715100}'::json > > <pre> > | json | > | :---------------- | > | {&quot;v&quot;: 300e715100} | > </pre> *db<>fiddle [here](https://dbfiddle.uk/?rdbms=postgres_9.6&fiddle=1584330f148ab0e9ed72529dfb466a12)*