mirror of
https://git.postgresql.org/git/postgresql.git
synced 2025-03-07 19:47:50 +08:00
6a1e2b3c28
and, dblink_fetch -- allows ERROR on remote side of connection to throw NOTICE locally instead of ERROR. Also removed documentation for previously deprecated, now removed, functions.
618 lines
16 KiB
Plaintext
618 lines
16 KiB
Plaintext
-- Adjust this setting to control where the objects get created.
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SET search_path = public;
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--
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-- Define the functions and test data
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-- therein.
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--
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-- Turn off echoing so that expected file does not depend on
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-- contents of dblink.sql.
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\set ECHO none
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CREATE TABLE foo(f1 int, f2 text, f3 text[], primary key (f1,f2));
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "foo_pkey" for table "foo"
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INSERT INTO foo VALUES (0,'a','{"a0","b0","c0"}');
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INSERT INTO foo VALUES (1,'b','{"a1","b1","c1"}');
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INSERT INTO foo VALUES (2,'c','{"a2","b2","c2"}');
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INSERT INTO foo VALUES (3,'d','{"a3","b3","c3"}');
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INSERT INTO foo VALUES (4,'e','{"a4","b4","c4"}');
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INSERT INTO foo VALUES (5,'f','{"a5","b5","c5"}');
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INSERT INTO foo VALUES (6,'g','{"a6","b6","c6"}');
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INSERT INTO foo VALUES (7,'h','{"a7","b7","c7"}');
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INSERT INTO foo VALUES (8,'i','{"a8","b8","c8"}');
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INSERT INTO foo VALUES (9,'j','{"a9","b9","c9"}');
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-- misc utilities
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-- show the currently executing query
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SELECT 'hello' AS hello, dblink_current_query() AS query;
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hello | query
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-------+-----------------------------------------------------------
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hello | SELECT 'hello' AS hello, dblink_current_query() AS query;
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(1 row)
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-- list the primary key fields
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SELECT *
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FROM dblink_get_pkey('foo');
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position | colname
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----------+---------
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1 | f1
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2 | f2
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(2 rows)
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-- build an insert statement based on a local tuple,
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-- replacing the primary key values with new ones
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SELECT dblink_build_sql_insert('foo','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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dblink_build_sql_insert
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-----------------------------------------------------------
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INSERT INTO foo(f1,f2,f3) VALUES('99','xyz','{a0,b0,c0}')
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(1 row)
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-- build an update statement based on a local tuple,
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-- replacing the primary key values with new ones
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SELECT dblink_build_sql_update('foo','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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dblink_build_sql_update
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----------------------------------------------------------------------------------------
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UPDATE foo SET f1 = '99', f2 = 'xyz', f3 = '{a0,b0,c0}' WHERE f1 = '99' AND f2 = 'xyz'
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(1 row)
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-- build a delete statement based on a local tuple,
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SELECT dblink_build_sql_delete('foo','1 2',2,'{"0", "a"}');
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dblink_build_sql_delete
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---------------------------------------------
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DELETE FROM foo WHERE f1 = '0' AND f2 = 'a'
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(1 row)
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-- retest using a quoted and schema qualified table
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CREATE SCHEMA "MySchema";
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CREATE TABLE "MySchema"."Foo"(f1 int, f2 text, f3 text[], primary key (f1,f2));
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "Foo_pkey" for table "Foo"
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INSERT INTO "MySchema"."Foo" VALUES (0,'a','{"a0","b0","c0"}');
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-- list the primary key fields
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SELECT *
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FROM dblink_get_pkey('"MySchema"."Foo"');
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position | colname
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----------+---------
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1 | f1
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2 | f2
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(2 rows)
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-- build an insert statement based on a local tuple,
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-- replacing the primary key values with new ones
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SELECT dblink_build_sql_insert('"MySchema"."Foo"','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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dblink_build_sql_insert
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------------------------------------------------------------------------
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INSERT INTO "MySchema"."Foo"(f1,f2,f3) VALUES('99','xyz','{a0,b0,c0}')
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(1 row)
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-- build an update statement based on a local tuple,
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-- replacing the primary key values with new ones
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SELECT dblink_build_sql_update('"MySchema"."Foo"','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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dblink_build_sql_update
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-----------------------------------------------------------------------------------------------------
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UPDATE "MySchema"."Foo" SET f1 = '99', f2 = 'xyz', f3 = '{a0,b0,c0}' WHERE f1 = '99' AND f2 = 'xyz'
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(1 row)
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-- build a delete statement based on a local tuple,
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SELECT dblink_build_sql_delete('"MySchema"."Foo"','1 2',2,'{"0", "a"}');
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dblink_build_sql_delete
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----------------------------------------------------------
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DELETE FROM "MySchema"."Foo" WHERE f1 = '0' AND f2 = 'a'
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(1 row)
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-- regular old dblink
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SELECT *
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FROM dblink('dbname=regression','SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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a | b | c
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---+---+------------
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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(2 rows)
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-- should generate "connection not available" error
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SELECT *
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FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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ERROR: connection not available
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-- create a persistent connection
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SELECT dblink_connect('dbname=regression');
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dblink_connect
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----------------
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OK
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(1 row)
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-- use the persistent connection
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SELECT *
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FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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a | b | c
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---+---+------------
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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(2 rows)
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-- open a cursor with bad SQL and fail_on_error set to false
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SELECT dblink_open('rmt_foo_cursor','SELECT * FROM foobar',false);
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NOTICE: sql error
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DETAIL: ERROR: relation "foobar" does not exist
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dblink_open
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-------------
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ERROR
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(1 row)
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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- open a cursor
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SELECT dblink_open('rmt_foo_cursor','SELECT * FROM foo');
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dblink_open
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-------------
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OK
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(1 row)
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-- close the cursor
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SELECT dblink_close('rmt_foo_cursor',false);
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dblink_close
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--------------
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OK
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(1 row)
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-- open the cursor again
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SELECT dblink_open('rmt_foo_cursor','SELECT * FROM foo');
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dblink_open
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-------------
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OK
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(1 row)
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-- fetch some data
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SELECT *
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FROM dblink_fetch('rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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a | b | c
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---+---+------------
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0 | a | {a0,b0,c0}
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1 | b | {a1,b1,c1}
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2 | c | {a2,b2,c2}
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3 | d | {a3,b3,c3}
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(4 rows)
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SELECT *
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FROM dblink_fetch('rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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a | b | c
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---+---+------------
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4 | e | {a4,b4,c4}
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5 | f | {a5,b5,c5}
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6 | g | {a6,b6,c6}
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7 | h | {a7,b7,c7}
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(4 rows)
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-- this one only finds two rows left
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SELECT *
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FROM dblink_fetch('rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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a | b | c
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---+---+------------
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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(2 rows)
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-- intentionally botch a fetch
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SELECT *
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FROM dblink_fetch('rmt_foobar_cursor',4,false) AS t(a int, b text, c text[]);
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NOTICE: sql error
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DETAIL: ERROR: cursor "rmt_foobar_cursor" does not exist
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a | b | c
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---+---+---
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(0 rows)
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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- close the wrong cursor
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SELECT dblink_close('rmt_foobar_cursor',false);
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NOTICE: sql error
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DETAIL: ERROR: cursor "rmt_foobar_cursor" does not exist
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dblink_close
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--------------
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ERROR
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(1 row)
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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- should generate 'cursor "rmt_foo_cursor" not found' error
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SELECT *
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FROM dblink_fetch('rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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ERROR: sql error
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DETAIL: ERROR: cursor "rmt_foo_cursor" does not exist
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-- this time, 'cursor "rmt_foo_cursor" not found' as a notice
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SELECT *
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FROM dblink_fetch('rmt_foo_cursor',4,false) AS t(a int, b text, c text[]);
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NOTICE: sql error
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DETAIL: ERROR: cursor "rmt_foo_cursor" does not exist
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a | b | c
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---+---+---
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(0 rows)
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-- close the persistent connection
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SELECT dblink_disconnect();
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dblink_disconnect
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-------------------
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OK
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(1 row)
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-- should generate "connection not available" error
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SELECT *
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FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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ERROR: connection not available
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-- put more data into our slave table, first using arbitrary connection syntax
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-- but truncate the actual return value so we can use diff to check for success
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SELECT substr(dblink_exec('dbname=regression','INSERT INTO foo VALUES(10,''k'',''{"a10","b10","c10"}'')'),1,6);
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substr
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--------
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INSERT
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(1 row)
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-- create a persistent connection
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SELECT dblink_connect('dbname=regression');
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dblink_connect
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----------------
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OK
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(1 row)
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-- put more data into our slave table, using persistent connection syntax
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-- but truncate the actual return value so we can use diff to check for success
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SELECT substr(dblink_exec('INSERT INTO foo VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
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substr
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--------
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INSERT
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(1 row)
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-- let's see it
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SELECT *
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FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[]);
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a | b | c
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----+---+---------------
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0 | a | {a0,b0,c0}
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1 | b | {a1,b1,c1}
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2 | c | {a2,b2,c2}
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3 | d | {a3,b3,c3}
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4 | e | {a4,b4,c4}
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5 | f | {a5,b5,c5}
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6 | g | {a6,b6,c6}
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7 | h | {a7,b7,c7}
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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10 | k | {a10,b10,c10}
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11 | l | {a11,b11,c11}
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(12 rows)
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-- bad remote select
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SELECT *
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FROM dblink('SELECT * FROM foobar',false) AS t(a int, b text, c text[]);
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NOTICE: sql error
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DETAIL: ERROR: relation "foobar" does not exist
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a | b | c
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---+---+---
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(0 rows)
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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- change some data
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SELECT dblink_exec('UPDATE foo SET f3[2] = ''b99'' WHERE f1 = 11');
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dblink_exec
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-------------
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UPDATE 1
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(1 row)
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-- let's see it
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SELECT *
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FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE a = 11;
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a | b | c
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----+---+---------------
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11 | l | {a11,b99,c11}
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(1 row)
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-- botch a change to some other data
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SELECT dblink_exec('UPDATE foobar SET f3[2] = ''b99'' WHERE f1 = 11',false);
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NOTICE: sql error
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DETAIL: ERROR: relation "foobar" does not exist
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dblink_exec
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-------------
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ERROR
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(1 row)
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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- delete some data
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SELECT dblink_exec('DELETE FROM foo WHERE f1 = 11');
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dblink_exec
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-------------
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DELETE 1
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(1 row)
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-- let's see it
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SELECT *
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FROM dblink('SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE a = 11;
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a | b | c
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---+---+---
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(0 rows)
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-- close the persistent connection
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SELECT dblink_disconnect();
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dblink_disconnect
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-------------------
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OK
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(1 row)
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--
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-- tests for the new named persistent connection syntax
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--
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-- should generate "missing "=" after "myconn" in connection info string" error
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SELECT *
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FROM dblink('myconn','SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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ERROR: could not establish connection
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DETAIL: missing "=" after "myconn" in connection info string
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-- create a named persistent connection
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SELECT dblink_connect('myconn','dbname=regression');
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dblink_connect
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----------------
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OK
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(1 row)
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-- use the named persistent connection
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SELECT *
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FROM dblink('myconn','SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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a | b | c
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----+---+---------------
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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10 | k | {a10,b10,c10}
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(3 rows)
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-- use the named persistent connection, but get it wrong
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SELECT *
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FROM dblink('myconn','SELECT * FROM foobar',false) AS t(a int, b text, c text[])
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WHERE t.a > 7;
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NOTICE: sql error
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DETAIL: ERROR: relation "foobar" does not exist
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a | b | c
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---+---+---
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(0 rows)
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-- reset remote transaction state
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SELECT dblink_exec('myconn','ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- create a second named persistent connection
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-- should error with "duplicate connection name"
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SELECT dblink_connect('myconn','dbname=regression');
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ERROR: duplicate connection name
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-- create a second named persistent connection with a new name
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SELECT dblink_connect('myconn2','dbname=regression');
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dblink_connect
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----------------
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OK
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(1 row)
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-- use the second named persistent connection
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SELECT *
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FROM dblink('myconn2','SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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a | b | c
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----+---+---------------
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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10 | k | {a10,b10,c10}
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(3 rows)
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-- close the second named persistent connection
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SELECT dblink_disconnect('myconn2');
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dblink_disconnect
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-------------------
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OK
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(1 row)
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-- open a cursor incorrectly
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SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foobar',false);
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NOTICE: sql error
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DETAIL: ERROR: relation "foobar" does not exist
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dblink_open
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-------------
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ERROR
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(1 row)
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-- reset remote transaction state
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SELECT dblink_exec('myconn','ABORT');
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dblink_exec
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-------------
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ROLLBACK
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(1 row)
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-- open a cursor
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SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foo');
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dblink_open
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-------------
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OK
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(1 row)
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-- fetch some data
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SELECT *
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FROM dblink_fetch('myconn','rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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a | b | c
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---+---+------------
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0 | a | {a0,b0,c0}
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1 | b | {a1,b1,c1}
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2 | c | {a2,b2,c2}
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3 | d | {a3,b3,c3}
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(4 rows)
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SELECT *
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FROM dblink_fetch('myconn','rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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a | b | c
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---+---+------------
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4 | e | {a4,b4,c4}
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5 | f | {a5,b5,c5}
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6 | g | {a6,b6,c6}
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7 | h | {a7,b7,c7}
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(4 rows)
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-- this one only finds three rows left
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SELECT *
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FROM dblink_fetch('myconn','rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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a | b | c
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----+---+---------------
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8 | i | {a8,b8,c8}
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9 | j | {a9,b9,c9}
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10 | k | {a10,b10,c10}
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(3 rows)
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-- fetch some data incorrectly
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SELECT *
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FROM dblink_fetch('myconn','rmt_foobar_cursor',4,false) AS t(a int, b text, c text[]);
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NOTICE: sql error
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DETAIL: ERROR: cursor "rmt_foobar_cursor" does not exist
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a | b | c
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---+---+---
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(0 rows)
|
|
|
|
-- reset remote transaction state
|
|
SELECT dblink_exec('myconn','ABORT');
|
|
dblink_exec
|
|
-------------
|
|
ROLLBACK
|
|
(1 row)
|
|
|
|
-- should generate 'cursor "rmt_foo_cursor" not found' error
|
|
SELECT *
|
|
FROM dblink_fetch('myconn','rmt_foo_cursor',4) AS t(a int, b text, c text[]);
|
|
ERROR: sql error
|
|
DETAIL: ERROR: cursor "rmt_foo_cursor" does not exist
|
|
|
|
-- close the named persistent connection
|
|
SELECT dblink_disconnect('myconn');
|
|
dblink_disconnect
|
|
-------------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- should generate "missing "=" after "myconn" in connection info string" error
|
|
SELECT *
|
|
FROM dblink('myconn','SELECT * FROM foo') AS t(a int, b text, c text[])
|
|
WHERE t.a > 7;
|
|
ERROR: could not establish connection
|
|
DETAIL: missing "=" after "myconn" in connection info string
|
|
|
|
-- create a named persistent connection
|
|
SELECT dblink_connect('myconn','dbname=regression');
|
|
dblink_connect
|
|
----------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- put more data into our slave table, using named persistent connection syntax
|
|
-- but truncate the actual return value so we can use diff to check for success
|
|
SELECT substr(dblink_exec('myconn','INSERT INTO foo VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
|
|
substr
|
|
--------
|
|
INSERT
|
|
(1 row)
|
|
|
|
-- let's see it
|
|
SELECT *
|
|
FROM dblink('myconn','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('myconn','UPDATE foo SET f3[2] = ''b99'' WHERE f1 = 11');
|
|
dblink_exec
|
|
-------------
|
|
UPDATE 1
|
|
(1 row)
|
|
|
|
-- let's see it
|
|
SELECT *
|
|
FROM dblink('myconn','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('myconn','DELETE FROM foo WHERE f1 = 11');
|
|
dblink_exec
|
|
-------------
|
|
DELETE 1
|
|
(1 row)
|
|
|
|
-- let's see it
|
|
SELECT *
|
|
FROM dblink('myconn','SELECT * FROM foo') AS t(a int, b text, c text[])
|
|
WHERE a = 11;
|
|
a | b | c
|
|
---+---+---
|
|
(0 rows)
|
|
|
|
-- close the named persistent connection
|
|
SELECT dblink_disconnect('myconn');
|
|
dblink_disconnect
|
|
-------------------
|
|
OK
|
|
(1 row)
|
|
|
|
-- close the named persistent connection again
|
|
-- should get 'connection "myconn" not available' error
|
|
SELECT dblink_disconnect('myconn');
|
|
ERROR: connection "myconn" not available
|