mirror of
https://github.com/postgres/postgres.git
synced 2025-05-21 15:54:08 +03:00
dede143997
Casting a value that's already of a type with a specific typmod to an unspecified typmod doesn't do anything so far as run-time behavior is concerned. However, it really ought to change the exposed type of the expression to match. Up to now, coerce_type_typmod hasn't bothered with that, which creates gotchas in contexts such as recursive unions. If for example one side of the union is numeric(18,3), but it needs to be plain numeric to match the other side, there's no direct way to express that. This is easy enough to fix, by inserting a RelabelType to update the exposed type of the expression. However, it's a bit nervous-making to change this behavior, because it's stood for a really long time. But no complaints have emerged about 14beta3, so go ahead and back-patch. Back-patch of 5c056b0c2 into previous supported branches. Discussion: https://postgr.es/m/CABNQVagu3bZGqiTjb31a8D5Od3fUMs7Oh3gmZMQZVHZ=uWWWfQ@mail.gmail.com Discussion: https://postgr.es/m/1488389.1631984807@sss.pgh.pa.us
88 lines
2.2 KiB
PL/PgSQL
88 lines
2.2 KiB
PL/PgSQL
--
|
|
-- expression evaluation tests that don't fit into a more specific file
|
|
--
|
|
|
|
--
|
|
-- Tests for SQLVAlueFunction
|
|
--
|
|
|
|
|
|
-- current_date (always matches because of transactional behaviour)
|
|
SELECT date(now())::text = current_date::text;
|
|
|
|
|
|
-- current_time / localtime
|
|
SELECT now()::timetz::text = current_time::text;
|
|
SELECT now()::timetz(4)::text = current_time(4)::text;
|
|
SELECT now()::time::text = localtime::text;
|
|
SELECT now()::time(3)::text = localtime(3)::text;
|
|
|
|
-- current_timestamp / localtimestamp (always matches because of transactional behaviour)
|
|
SELECT current_timestamp = NOW();
|
|
-- precision
|
|
SELECT length(current_timestamp::text) >= length(current_timestamp(0)::text);
|
|
-- localtimestamp
|
|
SELECT now()::timestamp::text = localtimestamp::text;
|
|
|
|
-- current_role/user/user is tested in rolnames.sql
|
|
|
|
-- current database / catalog
|
|
SELECT current_catalog = current_database();
|
|
|
|
-- current_schema
|
|
SELECT current_schema;
|
|
SET search_path = 'notme';
|
|
SELECT current_schema;
|
|
SET search_path = 'pg_catalog';
|
|
SELECT current_schema;
|
|
RESET search_path;
|
|
|
|
|
|
--
|
|
-- Tests for BETWEEN
|
|
--
|
|
|
|
explain (costs off)
|
|
select count(*) from date_tbl
|
|
where f1 between '1997-01-01' and '1998-01-01';
|
|
select count(*) from date_tbl
|
|
where f1 between '1997-01-01' and '1998-01-01';
|
|
|
|
explain (costs off)
|
|
select count(*) from date_tbl
|
|
where f1 not between '1997-01-01' and '1998-01-01';
|
|
select count(*) from date_tbl
|
|
where f1 not between '1997-01-01' and '1998-01-01';
|
|
|
|
explain (costs off)
|
|
select count(*) from date_tbl
|
|
where f1 between symmetric '1997-01-01' and '1998-01-01';
|
|
select count(*) from date_tbl
|
|
where f1 between symmetric '1997-01-01' and '1998-01-01';
|
|
|
|
explain (costs off)
|
|
select count(*) from date_tbl
|
|
where f1 not between symmetric '1997-01-01' and '1998-01-01';
|
|
select count(*) from date_tbl
|
|
where f1 not between symmetric '1997-01-01' and '1998-01-01';
|
|
|
|
|
|
--
|
|
-- Test parsing of a no-op cast to a type with unspecified typmod
|
|
--
|
|
begin;
|
|
|
|
create table numeric_tbl (f1 numeric(18,3), f2 numeric);
|
|
|
|
create view numeric_view as
|
|
select
|
|
f1, f1::numeric(16,4) as f1164, f1::numeric as f1n,
|
|
f2, f2::numeric(16,4) as f2164, f2::numeric as f2n
|
|
from numeric_tbl;
|
|
|
|
\d+ numeric_view
|
|
|
|
explain (verbose, costs off) select * from numeric_view;
|
|
|
|
rollback;
|