temp.out

来自「postgresql8.3.4源码,开源数据库」· OUT 代码 · 共 198 行

--
-- TEMP
-- Test temp relations and indexes
--
-- test temp table/index masking
CREATE TABLE temptest(col int);
CREATE INDEX i_temptest ON temptest(col);
CREATE TEMP TABLE temptest(tcol int);
CREATE INDEX i_temptest ON temptest(tcol);
SELECT * FROM temptest;
 tcol 
------
(0 rows)

DROP INDEX i_temptest;
DROP TABLE temptest;
SELECT * FROM temptest;
 col 
-----
(0 rows)

DROP INDEX i_temptest;
DROP TABLE temptest;
-- test temp table selects
CREATE TABLE temptest(col int);
INSERT INTO temptest VALUES (1);
CREATE TEMP TABLE temptest(tcol float);
INSERT INTO temptest VALUES (2.1);
SELECT * FROM temptest;
 tcol 
------
  2.1
(1 row)

DROP TABLE temptest;
SELECT * FROM temptest;
 col 
-----
   1
(1 row)

DROP TABLE temptest;
-- test temp table deletion
CREATE TEMP TABLE temptest(col int);
\c regression
SELECT * FROM temptest;
ERROR:  relation "temptest" does not exist
-- Test ON COMMIT DELETE ROWS
CREATE TEMP TABLE temptest(col int) ON COMMIT DELETE ROWS;
BEGIN;
INSERT INTO temptest VALUES (1);
INSERT INTO temptest VALUES (2);
SELECT * FROM temptest;
 col 
-----
   1
   2
(2 rows)

COMMIT;
SELECT * FROM temptest;
 col 
-----
(0 rows)

DROP TABLE temptest;
BEGIN;
CREATE TEMP TABLE temptest(col) ON COMMIT DELETE ROWS AS SELECT 1;
SELECT * FROM temptest;
 col 
-----
   1
(1 row)

COMMIT;
SELECT * FROM temptest;
 col 
-----
(0 rows)

DROP TABLE temptest;
-- Test ON COMMIT DROP
BEGIN;
CREATE TEMP TABLE temptest(col int) ON COMMIT DROP;
INSERT INTO temptest VALUES (1);
INSERT INTO temptest VALUES (2);
SELECT * FROM temptest;
 col 
-----
   1
   2
(2 rows)

COMMIT;
SELECT * FROM temptest;
ERROR:  relation "temptest" does not exist
BEGIN;
CREATE TEMP TABLE temptest(col) ON COMMIT DROP AS SELECT 1;
SELECT * FROM temptest;
 col 
-----
   1
(1 row)

COMMIT;
SELECT * FROM temptest;
ERROR:  relation "temptest" does not exist
-- ON COMMIT is only allowed for TEMP
CREATE TABLE temptest(col int) ON COMMIT DELETE ROWS;
ERROR:  ON COMMIT can only be used on temporary tables
CREATE TABLE temptest(col) ON COMMIT DELETE ROWS AS SELECT 1;
ERROR:  ON COMMIT can only be used on temporary tables
-- Test foreign keys
BEGIN;
CREATE TEMP TABLE temptest1(col int PRIMARY KEY);
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "temptest1_pkey" for table "temptest1"
CREATE TEMP TABLE temptest2(col int REFERENCES temptest1)
  ON COMMIT DELETE ROWS;
INSERT INTO temptest1 VALUES (1);
INSERT INTO temptest2 VALUES (1);
COMMIT;
SELECT * FROM temptest1;
 col 
-----
   1
(1 row)

SELECT * FROM temptest2;
 col 
-----
(0 rows)

BEGIN;
CREATE TEMP TABLE temptest3(col int PRIMARY KEY) ON COMMIT DELETE ROWS;
NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "temptest3_pkey" for table "temptest3"
CREATE TEMP TABLE temptest4(col int REFERENCES temptest3);
COMMIT;
ERROR:  unsupported ON COMMIT and foreign key combination
DETAIL:  Table "temptest4" references "temptest3", but they do not have the same ON COMMIT setting.
-- Test manipulation of temp schema's placement in search path
create table public.whereami (f1 text);
insert into public.whereami values ('public');
create temp table whereami (f1 text);
insert into whereami values ('temp');
create function public.whoami() returns text
  as $$select 'public'::text$$ language sql;
create function pg_temp.whoami() returns text
  as $$select 'temp'::text$$ language sql;
-- default should have pg_temp implicitly first, but only for tables
select * from whereami;
  f1  
------
 temp
(1 row)

select whoami();
 whoami 
--------
 public
(1 row)

-- can list temp first explicitly, but it still doesn't affect functions
set search_path = pg_temp, public;
select * from whereami;
  f1  
------
 temp
(1 row)

select whoami();
 whoami 
--------
 public
(1 row)

-- or put it last for security
set search_path = public, pg_temp;
select * from whereami;
   f1   
--------
 public
(1 row)

select whoami();
 whoami 
--------
 public
(1 row)

-- you can invoke a temp function explicitly, though
select pg_temp.whoami();
 whoami 
--------
 temp
(1 row)

drop table public.whereami;