[postgis-users] linked point and polygon tables

[Sandro Santilli]

On Wed, Apr 11, 2012 at 10:03:43PM +0200, Piotr Pachół wrote:
> Hello,
> Suppose we have in PostGIS  table with point geometry, ID column and
> some other attributes.
> Is it possible to create table with polygon/polyline geometry which
> is linked to table with point geometry ?
> I mean such a link where:
> - geometry of polygon/polyline is not created by set of coordinates
> but is created by (refering to) set of ID's from point table,
> - when some point object (from point geometry table) is removed it
> should automatically influence the shape of polygon/polyline.

You could make your referee a view using ST_MakePolygon/ST_MakeLine

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