guc.out

来自「postgresql8.3.4源码,开源数据库」· OUT 代码 · 共 702 行

-- pg_regress should ensure that this default value applies; however
-- we can't rely on any specific default value of vacuum_cost_delay
SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

-- SET to some nondefault value
SET vacuum_cost_delay TO 400;
SET datestyle = 'ISO, YMD';
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- SET LOCAL has no effect outside of a transaction
SET LOCAL vacuum_cost_delay TO 500;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SET LOCAL datestyle = 'SQL';
SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- SET LOCAL within a transaction that commits
BEGIN;
SET LOCAL vacuum_cost_delay TO 500;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 500ms
(1 row)

SET LOCAL datestyle = 'SQL';
SHOW datestyle;
 DateStyle 
-----------
 SQL, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
       timestamptz       
-------------------------
 08/13/2006 12:34:56 PDT
(1 row)

COMMIT;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- SET should be reverted after ROLLBACK
BEGIN;
SET vacuum_cost_delay TO 600;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 600ms
(1 row)

SET datestyle = 'German';
SHOW datestyle;
  DateStyle  
-------------
 German, DMY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
       timestamptz       
-------------------------
 13.08.2006 12:34:56 PDT
(1 row)

ROLLBACK;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- Some tests with subtransactions
BEGIN;
SET vacuum_cost_delay TO 700;
SET datestyle = 'MDY';
SHOW datestyle;
 DateStyle 
-----------
 ISO, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

SAVEPOINT first_sp;
SET vacuum_cost_delay TO 800;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 800ms
(1 row)

SET datestyle = 'German, DMY';
SHOW datestyle;
  DateStyle  
-------------
 German, DMY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
       timestamptz       
-------------------------
 13.08.2006 12:34:56 PDT
(1 row)

ROLLBACK TO first_sp;
SHOW datestyle;
 DateStyle 
-----------
 ISO, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

SAVEPOINT second_sp;
SET vacuum_cost_delay TO 900;
SET datestyle = 'SQL, YMD';
SHOW datestyle;
 DateStyle 
-----------
 SQL, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
       timestamptz       
-------------------------
 08/13/2006 12:34:56 PDT
(1 row)

SAVEPOINT third_sp;
SET vacuum_cost_delay TO 1000;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 1s
(1 row)

SET datestyle = 'Postgres, MDY';
SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
         timestamptz          
------------------------------
 Sun Aug 13 12:34:56 2006 PDT
(1 row)

ROLLBACK TO third_sp;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 900ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 SQL, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
       timestamptz       
-------------------------
 08/13/2006 12:34:56 PDT
(1 row)

ROLLBACK TO second_sp;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 700ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

ROLLBACK;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- SET LOCAL with Savepoints
BEGIN;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

SAVEPOINT sp;
SET LOCAL vacuum_cost_delay TO 300;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 300ms
(1 row)

SET LOCAL datestyle = 'Postgres, MDY';
SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
         timestamptz          
------------------------------
 Sun Aug 13 12:34:56 2006 PDT
(1 row)

ROLLBACK TO sp;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

ROLLBACK;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- SET LOCAL persists through RELEASE (which was not true in 8.0-8.2)
BEGIN;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

SAVEPOINT sp;
SET LOCAL vacuum_cost_delay TO 300;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 300ms
(1 row)

SET LOCAL datestyle = 'Postgres, MDY';
SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
         timestamptz          
------------------------------
 Sun Aug 13 12:34:56 2006 PDT
(1 row)

RELEASE SAVEPOINT sp;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 300ms
(1 row)

SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
         timestamptz          
------------------------------
 Sun Aug 13 12:34:56 2006 PDT
(1 row)

ROLLBACK;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

-- SET followed by SET LOCAL
BEGIN;
SET vacuum_cost_delay TO 400;
SET LOCAL vacuum_cost_delay TO 500;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 500ms
(1 row)

SET datestyle = 'ISO, DMY';
SET LOCAL datestyle = 'Postgres, MDY';
SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
         timestamptz          
------------------------------
 Sun Aug 13 12:34:56 2006 PDT
(1 row)

COMMIT;
SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 400ms
(1 row)

SHOW datestyle;
 DateStyle 
-----------
 ISO, DMY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

--
-- Test RESET.  We use datestyle because the reset value is forced by
-- pg_regress, so it doesn't depend on the installation's configuration.
--
SET datestyle = iso, ymd;
SHOW datestyle;
 DateStyle 
-----------
 ISO, YMD
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
      timestamptz       
------------------------
 2006-08-13 12:34:56-07
(1 row)

RESET datestyle;
SHOW datestyle;
   DateStyle   
---------------
 Postgres, MDY
(1 row)

SELECT '2006-08-13 12:34:56'::timestamptz;
         timestamptz          
------------------------------
 Sun Aug 13 12:34:56 2006 PDT
(1 row)

--
-- Test DISCARD TEMP
--
CREATE TEMP TABLE reset_test ( data text ) ON COMMIT DELETE ROWS;
SELECT relname FROM pg_class WHERE relname = 'reset_test';
  relname   
------------
 reset_test
(1 row)

DISCARD TEMP;
SELECT relname FROM pg_class WHERE relname = 'reset_test';
 relname 
---------
(0 rows)

--
-- Test DISCARD ALL
--
-- do changes
DECLARE foo CURSOR WITH HOLD FOR SELECT 1;
PREPARE foo AS SELECT 1;
LISTEN foo_event;
SET vacuum_cost_delay = 13;
CREATE TEMP TABLE tmp_foo (data text) ON COMMIT DELETE ROWS;
CREATE ROLE temp_reset_user;
SET SESSION AUTHORIZATION temp_reset_user;
-- look changes
SELECT relname FROM pg_listener;
  relname  
-----------
 foo_event
(1 row)

SELECT name FROM pg_prepared_statements;
 name 
------
 foo
(1 row)

SELECT name FROM pg_cursors;
 name 
------
 foo
(1 row)

SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 13ms
(1 row)

SELECT relname from pg_class where relname = 'tmp_foo';
 relname 
---------
 tmp_foo
(1 row)

SELECT current_user = 'temp_reset_user';
 ?column? 
----------
 t
(1 row)

-- discard everything
DISCARD ALL;
-- look again
SELECT relname FROM pg_listener;
 relname 
---------
(0 rows)

SELECT name FROM pg_prepared_statements;
 name 
------
(0 rows)

SELECT name FROM pg_cursors;
 name 
------
(0 rows)

SHOW vacuum_cost_delay;
 vacuum_cost_delay 
-------------------
 0
(1 row)

SELECT relname from pg_class where relname = 'tmp_foo';
 relname 
---------
(0 rows)

SELECT current_user = 'temp_reset_user';
 ?column? 
----------
 f
(1 row)

DROP ROLE temp_reset_user;
--
-- Tests for function-local GUC settings
--
set regex_flavor = advanced;
create function report_guc(text) returns text as
$$ select current_setting($1) $$ language sql
set regex_flavor = basic;
select report_guc('regex_flavor'), current_setting('regex_flavor');
 report_guc | current_setting 
------------+-----------------
 basic      | advanced
(1 row)

-- this should draw only a warning
alter function report_guc(text) set search_path = no_such_schema;
NOTICE:  schema "no_such_schema" does not exist
-- with error occurring here
select report_guc('regex_flavor'), current_setting('regex_flavor');
ERROR:  schema "no_such_schema" does not exist
alter function report_guc(text) reset search_path set regex_flavor = extended;
select report_guc('regex_flavor'), current_setting('regex_flavor');
 report_guc | current_setting 
------------+-----------------
 extended   | advanced
(1 row)

alter function report_guc(text) reset all;
select report_guc('regex_flavor'), current_setting('regex_flavor');
 report_guc | current_setting 
------------+-----------------
 advanced   | advanced
(1 row)

-- SET LOCAL is restricted by a function SET option
create or replace function myfunc(int) returns text as $$
begin
  set local regex_flavor = extended;
  return current_setting('regex_flavor');
end $$
language plpgsql
set regex_flavor = basic;
select myfunc(0), current_setting('regex_flavor');
  myfunc  | current_setting 
----------+-----------------
 extended | advanced
(1 row)

alter function myfunc(int) reset all;
select myfunc(0), current_setting('regex_flavor');
  myfunc  | current_setting 
----------+-----------------
 extended | extended
(1 row)

set regex_flavor = advanced;
-- but SET isn't
create or replace function myfunc(int) returns text as $$
begin
  set regex_flavor = extended;
  return current_setting('regex_flavor');
end $$
language plpgsql
set regex_flavor = basic;
select myfunc(0), current_setting('regex_flavor');
  myfunc  | current_setting 
----------+-----------------
 extended | extended
(1 row)

set regex_flavor = advanced;
-- it should roll back on error, though
create or replace function myfunc(int) returns text as $$
begin
  set regex_flavor = extended;
  perform 1/$1;
  return current_setting('regex_flavor');
end $$
language plpgsql
set regex_flavor = basic;
select myfunc(0);
ERROR:  division by zero
CONTEXT:  SQL statement "SELECT  1/ $1 "
PL/pgSQL function "myfunc" line 3 at PERFORM
select current_setting('regex_flavor');
 current_setting 
-----------------
 advanced
(1 row)

select myfunc(1), current_setting('regex_flavor');
  myfunc  | current_setting 
----------+-----------------
 extended | extended
(1 row)