PostgreSQL 7.3.2
CREATE DOMAIN testdom AS int4;
CREATE TABLE testtab(testcol testdom);
INSERT INTO testtab VALUES (1);
INSERT INTO testtab VALUES (2);
VACUUM ANALYZE testtab;
SELECT * FROM testtab WHERE testcol > 1;
The select will give "ERROR: convert_numeric_to_scalar: unsupported type 3381436"
If no VACUUM ANALYZE is performed (no entry in pg_stats), the select
will work ok.
The select will also succeed, if testcol is compared to something
different from 1.
Defining a cast CREATE CAST(testdom as int4) WITHOUT FUNCTION AS IMPLICIT
doesn't help.
If I change the datatype
UPDATE pg_attribute SET atttypid=(select oid from pg_type where typname = 'int4') WHERE
atttypid=(selectoid from pg_type where typname = 'testdom') AND attname='testcol'
the select will work as expected.
