mirror of
https://git.postgresql.org/git/postgresql.git
synced 2026-02-14 18:37:03 +08:00
42ce74bf17
large objects. Dump all these in pg_dump; also add code to pg_dump user-defined conversions. Make psql's large object code rely on the backend for inserting/deleting LOB comments, instead of trying to hack pg_description directly. Documentation and regression tests added. Christopher Kings-Lynne, code reviewed by Tom
66 lines
1.3 KiB
SQL
66 lines
1.3 KiB
SQL
--
|
|
-- CREATE_VIEW
|
|
-- Virtual class definitions
|
|
-- (this also tests the query rewrite system)
|
|
--
|
|
|
|
CREATE VIEW street AS
|
|
SELECT r.name, r.thepath, c.cname AS cname
|
|
FROM ONLY road r, real_city c
|
|
WHERE c.outline ## r.thepath;
|
|
|
|
CREATE VIEW iexit AS
|
|
SELECT ih.name, ih.thepath,
|
|
interpt_pp(ih.thepath, r.thepath) AS exit
|
|
FROM ihighway ih, ramp r
|
|
WHERE ih.thepath ## r.thepath;
|
|
|
|
CREATE VIEW toyemp AS
|
|
SELECT name, age, location, 12*salary AS annualsal
|
|
FROM emp;
|
|
|
|
-- Test comments
|
|
COMMENT ON VIEW noview IS 'no view';
|
|
COMMENT ON VIEW toyemp IS 'is a view';
|
|
COMMENT ON VIEW toyemp IS NULL;
|
|
|
|
--
|
|
-- CREATE OR REPLACE VIEW
|
|
--
|
|
|
|
CREATE TABLE viewtest_tbl (a int, b int);
|
|
COPY viewtest_tbl FROM stdin;
|
|
5 10
|
|
10 15
|
|
15 20
|
|
20 25
|
|
\.
|
|
|
|
CREATE OR REPLACE VIEW viewtest AS
|
|
SELECT * FROM viewtest_tbl;
|
|
|
|
CREATE OR REPLACE VIEW viewtest AS
|
|
SELECT * FROM viewtest_tbl WHERE a > 10;
|
|
|
|
SELECT * FROM viewtest;
|
|
|
|
CREATE OR REPLACE VIEW viewtest AS
|
|
SELECT a, b FROM viewtest_tbl WHERE a > 5 ORDER BY b DESC;
|
|
|
|
SELECT * FROM viewtest;
|
|
|
|
-- should fail
|
|
CREATE OR REPLACE VIEW viewtest AS
|
|
SELECT a FROM viewtest_tbl WHERE a <> 20;
|
|
|
|
-- should fail
|
|
CREATE OR REPLACE VIEW viewtest AS
|
|
SELECT 1, * FROM viewtest_tbl;
|
|
|
|
-- should fail
|
|
CREATE OR REPLACE VIEW viewtest AS
|
|
SELECT a, b::numeric FROM viewtest_tbl;
|
|
|
|
DROP VIEW viewtest;
|
|
DROP TABLE viewtest_tbl;
|