[postgis-devel] CASE w/out ELSE hides typmod (was: How define a view that use a case operator for geometry field)

[Sandro Santilli]

On Fri, Oct 28, 2011 at 10:33:45PM +0200, aperi2007 wrote:

> Seem that postgis try to define it an else condition assigning it a
> unknown "geometry" ?

It's PostgreSQL, not PostGIS.

The same happens with any type, can be reproduced with something like this:

=# CREATE VIEW test1 AS SELECT
  CASE WHEN random() < 0.5 THEN 1::numeric(10, 0)
  END;

=# \d test1
       View "test.test1"
 Column |  Type   | Modifiers
--------+---------+-----------
 case   | numeric |

=# CREATE VIEW test2 AS SELECT
  CASE WHEN random() < 0.5 THEN 1::numeric(10, 0)
  ELSE 0::numeric(10, 0)
  END;

=# \d test2
         View "test.test2"
 Column |     Type      | Modifiers
--------+---------------+-----------
 case   | numeric(10,0) |


Maybe someone on pgsql-hackers can tell us more about this.

--strk;

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