Upgrade to 2.2 doesn't adjust size of pgis_abs type

[dbaston]

The size of the pgis_abs type was changed from 8 bytes to 16 bytes in 2.2.0. It doesn't appear that the upgrade procedure handles this, so if you upgrade to 2.2.x from a previous version, Postgres would still think the size is 8 bytes.

I haven't been able to show this, because I can't actually perform an upgrade from 2.1.x to more recent versions due to #3429. But this seems like it would explain the following issue reported to postgis-users:

On Wed, Feb 17, 2016 at 01:44:54PM +0100, Ronnie Lassche wrote:

I’m trying to use the new st_clusterwithin function, but it keeps failing.

I’ve tried to cluster 20 points with the following query.

SELECT ST_ClusterWithin(geom, 50) FROM winkels

Most of the times I get the message

“ERROR: Tolerance not defined

A few times it did work and gave me a result, but trying again will lead to the same error.

I’m working with postgis 2.2.2dev (but also tried it with 2.2.0).

(The tolerance value is stored in the second 8 bytes of pgis_abs)