mirror of
https://git.postgresql.org/git/postgresql.git
synced 2024-08-22 08:53:23 +02:00
242 lines
6.9 KiB
Plaintext
242 lines
6.9 KiB
Plaintext
--
|
|
-- First, create a slave database and define the functions and test data
|
|
-- therein.
|
|
--
|
|
-- This initial hackery is to allow successive runs without failures.
|
|
--
|
|
CREATE OR REPLACE FUNCTION conditional_drop() RETURNS text AS '
|
|
DECLARE
|
|
dbname text;
|
|
BEGIN
|
|
SELECT INTO dbname datname FROM pg_database WHERE datname = ''regression_slave'';
|
|
IF FOUND THEN
|
|
DROP DATABASE regression_slave;
|
|
END IF;
|
|
RETURN ''OK'';
|
|
END;
|
|
' LANGUAGE 'plpgsql';
|
|
SELECT conditional_drop();
|
|
conditional_drop
|
|
------------------
|
|
OK
|
|
(1 row)
|
|
|
|
CREATE DATABASE regression_slave;
|
|
\connect regression_slave
|
|
-- Turn off echoing so that expected file does not depend on
|
|
-- contents of dblink.sql.
|
|
\set ECHO none
|
|
create table foo(f1 int, f2 text, f3 text[], primary key (f1,f2));
|
|
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index 'foo_pkey' for table 'foo'
|
|
insert into foo values(0,'a','{"a0","b0","c0"}');
|
|
insert into foo values(1,'b','{"a1","b1","c1"}');
|
|
insert into foo values(2,'c','{"a2","b2","c2"}');
|
|
insert into foo values(3,'d','{"a3","b3","c3"}');
|
|
insert into foo values(4,'e','{"a4","b4","c4"}');
|
|
insert into foo values(5,'f','{"a5","b5","c5"}');
|
|
insert into foo values(6,'g','{"a6","b6","c6"}');
|
|
insert into foo values(7,'h','{"a7","b7","c7"}');
|
|
insert into foo values(8,'i','{"a8","b8","c8"}');
|
|
insert into foo values(9,'j','{"a9","b9","c9"}');
|
|
-- misc utilities
|
|
-- show the currently executing query
|
|
select 'hello' as hello, dblink_current_query() as query;
|
|
hello | query
|
|
-------+-----------------------------------------------------------
|
|
hello | select 'hello' as hello, dblink_current_query() as query;
|
|
(1 row)
|
|
|
|
-- list the primary key fields
|
|
select * from dblink_get_pkey('foo');
|
|
position | colname
|
|
----------+---------
|
|
1 | f1
|
|
2 | f2
|
|
(2 rows)
|
|
|
|
-- build an insert statement based on a local tuple,
|
|
-- replacing the primary key values with new ones
|
|
select dblink_build_sql_insert('foo','1 2',2,'{"0", "a"}','{"99", "xyz"}');
|
|
dblink_build_sql_insert
|
|
-----------------------------------------------------------
|
|
INSERT INTO foo(f1,f2,f3) VALUES('99','xyz','{a0,b0,c0}')
|
|
(1 row)
|
|
|
|
-- build an update statement based on a local tuple,
|
|
-- replacing the primary key values with new ones
|
|
select dblink_build_sql_update('foo','1 2',2,'{"0", "a"}','{"99", "xyz"}');
|
|
dblink_build_sql_update
|
|
----------------------------------------------------------------------------------------
|
|
UPDATE foo SET f1 = '99', f2 = 'xyz', f3 = '{a0,b0,c0}' WHERE f1 = '99' AND f2 = 'xyz'
|
|
(1 row)
|
|
|
|
-- build a delete statement based on a local tuple,
|
|
select dblink_build_sql_delete('foo','1 2',2,'{"0", "a"}');
|
|
dblink_build_sql_delete
|
|
---------------------------------------------
|
|
DELETE FROM foo WHERE f1 = '0' AND f2 = 'a'
|
|
(1 row)
|
|
|
|
--
|
|
-- Connect back to the regression database and define the functions.
|
|
-- Turn off echoing so that expected file does not depend on
|
|
-- contents of dblink.sql.
|
|
--
|
|
\connect regression
|
|
\set ECHO none
|
|
-- regular old dblink
|
|
select * from dblink('dbname=regression_slave','select * from foo') as t(a int, b text, c text[]) where t.a > 7;
|
|
a | b | c
|
|
---+---+------------
|
|
8 | i | {a8,b8,c8}
|
|
9 | j | {a9,b9,c9}
|
|
(2 rows)
|
|
|
|
-- should generate "no connection available" error
|
|
select * from dblink('select * from foo') as t(a int, b text, c text[]) where t.a > 7;
|
|
ERROR: dblink: no connection available
|
|
-- create a persistent connection
|
|
select dblink_connect('dbname=regression_slave');
|
|
dblink_connect
|
|
----------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- use the persistent connection
|
|
select * from dblink('select * from foo') as t(a int, b text, c text[]) where t.a > 7;
|
|
a | b | c
|
|
---+---+------------
|
|
8 | i | {a8,b8,c8}
|
|
9 | j | {a9,b9,c9}
|
|
(2 rows)
|
|
|
|
-- open a cursor
|
|
select dblink_open('rmt_foo_cursor','select * from foo');
|
|
dblink_open
|
|
-------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- fetch some data
|
|
select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
|
|
a | b | c
|
|
---+---+------------
|
|
0 | a | {a0,b0,c0}
|
|
1 | b | {a1,b1,c1}
|
|
2 | c | {a2,b2,c2}
|
|
3 | d | {a3,b3,c3}
|
|
(4 rows)
|
|
|
|
select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
|
|
a | b | c
|
|
---+---+------------
|
|
4 | e | {a4,b4,c4}
|
|
5 | f | {a5,b5,c5}
|
|
6 | g | {a6,b6,c6}
|
|
7 | h | {a7,b7,c7}
|
|
(4 rows)
|
|
|
|
-- this one only finds two rows left
|
|
select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
|
|
a | b | c
|
|
---+---+------------
|
|
8 | i | {a8,b8,c8}
|
|
9 | j | {a9,b9,c9}
|
|
(2 rows)
|
|
|
|
-- close the cursor
|
|
select dblink_close('rmt_foo_cursor');
|
|
dblink_close
|
|
--------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- should generate "cursor rmt_foo_cursor does not exist" error
|
|
select * from dblink_fetch('rmt_foo_cursor',4) as t(a int, b text, c text[]);
|
|
ERROR: dblink_fetch: cursor rmt_foo_cursor does not exist
|
|
-- close the persistent connection
|
|
select dblink_disconnect();
|
|
dblink_disconnect
|
|
-------------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- should generate "no connection available" error
|
|
select * from dblink('select * from foo') as t(a int, b text, c text[]) where t.a > 7;
|
|
ERROR: dblink: no connection available
|
|
-- put more data into our slave table, first using arbitrary connection syntax
|
|
-- but truncate the actual return value so we can use diff to check for success
|
|
select substr(dblink_exec('dbname=regression_slave','insert into foo values(10,''k'',''{"a10","b10","c10"}'')'),1,6);
|
|
substr
|
|
--------
|
|
INSERT
|
|
(1 row)
|
|
|
|
-- create a persistent connection
|
|
select dblink_connect('dbname=regression_slave');
|
|
dblink_connect
|
|
----------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- put more data into our slave table, using persistent connection syntax
|
|
-- but truncate the actual return value so we can use diff to check for success
|
|
select substr(dblink_exec('insert into foo values(11,''l'',''{"a11","b11","c11"}'')'),1,6);
|
|
substr
|
|
--------
|
|
INSERT
|
|
(1 row)
|
|
|
|
-- let's see it
|
|
select * from dblink('select * from foo') as t(a int, b text, c text[]);
|
|
a | b | c
|
|
----+---+---------------
|
|
0 | a | {a0,b0,c0}
|
|
1 | b | {a1,b1,c1}
|
|
2 | c | {a2,b2,c2}
|
|
3 | d | {a3,b3,c3}
|
|
4 | e | {a4,b4,c4}
|
|
5 | f | {a5,b5,c5}
|
|
6 | g | {a6,b6,c6}
|
|
7 | h | {a7,b7,c7}
|
|
8 | i | {a8,b8,c8}
|
|
9 | j | {a9,b9,c9}
|
|
10 | k | {a10,b10,c10}
|
|
11 | l | {a11,b11,c11}
|
|
(12 rows)
|
|
|
|
-- change some data
|
|
select dblink_exec('update foo set f3[2] = ''b99'' where f1 = 11');
|
|
dblink_exec
|
|
-------------
|
|
UPDATE 1
|
|
(1 row)
|
|
|
|
-- let's see it
|
|
select * from dblink('select * from foo') as t(a int, b text, c text[]) where a = 11;
|
|
a | b | c
|
|
----+---+---------------
|
|
11 | l | {a11,b99,c11}
|
|
(1 row)
|
|
|
|
-- delete some data
|
|
select dblink_exec('delete from foo where f1 = 11');
|
|
dblink_exec
|
|
-------------
|
|
DELETE 1
|
|
(1 row)
|
|
|
|
-- let's see it
|
|
select * from dblink('select * from foo') as t(a int, b text, c text[]) where a = 11;
|
|
a | b | c
|
|
---+---+---
|
|
(0 rows)
|
|
|
|
-- close the persistent connection
|
|
select dblink_disconnect();
|
|
dblink_disconnect
|
|
-------------------
|
|
OK
|
|
(1 row)
|
|
|