On Tue, Dec 10, 2019 at 11:43 AM Guillaume Lelarge <guillaume(at)lelarge(dot)info>
wrote:
This query uses the column statistics to estimate bloat. AFAIK, json
> columns don't have statistics, so the estimation can't be relied on (for
> this specific table at least).
>
This was true prior to 9.5 (for xml at least, I don't know about json), but
should not be true from that release onward. But still the difference
between 74440704 and 74506240, this does seem to me to be straining at a
gnat to swallow a camel.
Cheers,
Jeff