Re: Returning JSON or JSONB

Dane Foster <studdugie(at)gmail(dot)com> wrote:

> Hello,
>
> I was wondering when returning JSON data from a PostgreSQL function for
> consumption by clients (e.g., PHP or Lua) does it make any difference to
> declare the function's return type as JSON or JSONB?

JSONB is only for internal storage, for external representation you need
JSON.

> Now that I've actually written the question down it occurs to me that what I
> really want to know is which data type (JSON or JSONB or maybe TEXT) has the
> lowest overhead in terms of transformation and transmission at the PostgreSQL
> protocol level.

If you are returning JSON, so is JSON the best choice.

Andreas
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