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8224de4f42
This patch introduces INCLUDE clause to index definition. This clause specifies a list of columns which will be included as a non-key part in the index. The INCLUDE columns exist solely to allow more queries to benefit from index-only scans. Also, such columns don't need to have appropriate operator classes. Expressions are not supported as INCLUDE columns since they cannot be used in index-only scans. Index access methods supporting INCLUDE are indicated by amcaninclude flag in IndexAmRoutine. For now, only B-tree indexes support INCLUDE clause. In B-tree indexes INCLUDE columns are truncated from pivot index tuples (tuples located in non-leaf pages and high keys). Therefore, B-tree indexes now might have variable number of attributes. This patch also provides generic facility to support that: pivot tuples contain number of their attributes in t_tid.ip_posid. Free 13th bit of t_info is used for indicating that. This facility will simplify further support of index suffix truncation. The changes of above are backward-compatible, pg_upgrade doesn't need special handling of B-tree indexes for that. Bump catalog version Author: Anastasia Lubennikova with contribition by Alexander Korotkov and me Reviewed by: Peter Geoghegan, Tomas Vondra, Antonin Houska, Jeff Janes, David Rowley, Alexander Korotkov Discussion: https://www.postgresql.org/message-id/flat/56168952.4010101@postgrespro.ru
604 lines
20 KiB
PL/PgSQL
604 lines
20 KiB
PL/PgSQL
CREATE EXTENSION dblink;
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-- want context for notices
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\set SHOW_CONTEXT always
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CREATE TABLE foo(f1 int, f2 text, f3 text[], primary key (f1,f2));
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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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-- list the primary key fields
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SELECT *
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FROM dblink_get_pkey('foo');
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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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-- too many pk fields, should fail
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SELECT dblink_build_sql_insert('foo','1 2 3 4',4,'{"0", "a", "{a0,b0,c0}"}','{"99", "xyz", "{za0,zb0,zc0}"}');
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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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-- too many pk fields, should fail
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SELECT dblink_build_sql_update('foo','1 2 3 4',4,'{"0", "a", "{a0,b0,c0}"}','{"99", "xyz", "{za0,zb0,zc0}"}');
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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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-- too many pk fields, should fail
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SELECT dblink_build_sql_delete('foo','1 2 3 4',4,'{"0", "a", "{a0,b0,c0}"}');
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-- repeat the test for table with primary key index with included columns
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CREATE TABLE foo_1(f1 int, f2 text, f3 text[], primary key (f1,f2) include (f3));
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INSERT INTO foo_1 VALUES (0,'a','{"a0","b0","c0"}');
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INSERT INTO foo_1 VALUES (1,'b','{"a1","b1","c1"}');
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INSERT INTO foo_1 VALUES (2,'c','{"a2","b2","c2"}');
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INSERT INTO foo_1 VALUES (3,'d','{"a3","b3","c3"}');
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INSERT INTO foo_1 VALUES (4,'e','{"a4","b4","c4"}');
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INSERT INTO foo_1 VALUES (5,'f','{"a5","b5","c5"}');
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INSERT INTO foo_1 VALUES (6,'g','{"a6","b6","c6"}');
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INSERT INTO foo_1 VALUES (7,'h','{"a7","b7","c7"}');
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INSERT INTO foo_1 VALUES (8,'i','{"a8","b8","c8"}');
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INSERT INTO foo_1 VALUES (9,'j','{"a9","b9","c9"}');
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-- misc utilities
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-- list the primary key fields
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SELECT *
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FROM dblink_get_pkey('foo_1');
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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','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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-- too many pk fields, should fail
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SELECT dblink_build_sql_insert('foo_1','1 2 3 4',4,'{"0", "a", "{a0,b0,c0}"}','{"99", "xyz", "{za0,zb0,zc0}"}');
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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','1 2',2,'{"0", "a"}','{"99", "xyz"}');
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-- too many pk fields, should fail
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SELECT dblink_build_sql_update('foo_1','1 2 3 4',4,'{"0", "a", "{a0,b0,c0}"}','{"99", "xyz", "{za0,zb0,zc0}"}');
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-- build a delete statement based on a local tuple,
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SELECT dblink_build_sql_delete('foo_1','1 2',2,'{"0", "a"}');
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-- too many pk fields, should fail
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SELECT dblink_build_sql_delete('foo_1','1 2 3 4',4,'{"0", "a", "{a0,b0,c0}"}');
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DROP TABLE foo_1;
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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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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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-- 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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-- 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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-- 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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CREATE FUNCTION connection_parameters() RETURNS text LANGUAGE SQL AS $f$
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SELECT $$dbname='$$||current_database()||$$' port=$$||current_setting('port');
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$f$;
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-- regular old dblink
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SELECT *
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FROM dblink(connection_parameters(),'SELECT * FROM foo') AS t(a int, b text, c text[])
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WHERE t.a > 7;
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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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-- The first-level connection's backend will crash on exit given OpenLDAP
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-- [2.4.24, 2.4.31]. We won't see evidence of any crash until the victim
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-- process terminates and the postmaster responds. If process termination
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-- entails writing a core dump, that can take awhile. Wait for the process to
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-- vanish. At that point, the postmaster has called waitpid() on the crashed
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-- process, and it will accept no new connections until it has reinitialized
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-- the cluster. (We can't exploit pg_stat_activity, because the crash happens
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-- after the backend updates shared memory to reflect its impending exit.)
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DO $pl$
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DECLARE
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detail text;
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BEGIN
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PERFORM wait_pid(crash_pid)
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FROM dblink(connection_parameters(), $$
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SELECT pg_backend_pid() FROM dblink(
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'service=test_ldap '||connection_parameters(),
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-- This string concatenation is a hack to shoehorn a
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-- set_pgservicefile call into the SQL statement.
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'SELECT 1' || set_pgservicefile('pg_service.conf')
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) t(c int)
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$$) AS t(crash_pid int);
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EXCEPTION WHEN OTHERS THEN
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GET STACKED DIAGNOSTICS detail = PG_EXCEPTION_DETAIL;
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-- Expected error in a non-LDAP build.
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IF NOT detail LIKE 'syntax error in service file%' THEN RAISE; END IF;
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END
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$pl$;
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-- create a persistent connection
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SELECT dblink_connect(connection_parameters());
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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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-- 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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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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-- open a cursor
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SELECT dblink_open('rmt_foo_cursor','SELECT * FROM foo');
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-- close the cursor
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SELECT dblink_close('rmt_foo_cursor',false);
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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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-- 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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SELECT *
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FROM dblink_fetch('rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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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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-- 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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-- reset remote transaction state
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SELECT dblink_exec('ABORT');
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-- close the wrong cursor
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SELECT dblink_close('rmt_foobar_cursor',false);
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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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-- 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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-- close the persistent connection
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SELECT dblink_disconnect();
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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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-- put more data into our 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(connection_parameters(),'INSERT INTO foo VALUES(10,''k'',''{"a10","b10","c10"}'')'),1,6);
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-- create a persistent connection
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SELECT dblink_connect(connection_parameters());
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-- put more data into our 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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-- 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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-- 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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-- change some data
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SELECT dblink_exec('UPDATE foo SET f3[2] = ''b99'' WHERE f1 = 11');
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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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-- 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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-- delete some data
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SELECT dblink_exec('DELETE FROM foo WHERE f1 = 11');
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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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-- close the persistent connection
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SELECT dblink_disconnect();
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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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-- create a named persistent connection
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SELECT dblink_connect('myconn',connection_parameters());
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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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-- 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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-- create a second named persistent connection
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-- should error with "duplicate connection name"
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SELECT dblink_connect('myconn',connection_parameters());
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-- create a second named persistent connection with a new name
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SELECT dblink_connect('myconn2',connection_parameters());
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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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-- close the second named persistent connection
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SELECT dblink_disconnect('myconn2');
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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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-- reset remote transaction state
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SELECT dblink_exec('myconn','ABORT');
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-- test opening cursor in a transaction
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SELECT dblink_exec('myconn','BEGIN');
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-- an open transaction will prevent dblink_open() from opening its own
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SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foo');
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-- this should not commit the transaction because the client opened it
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SELECT dblink_close('myconn','rmt_foo_cursor');
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-- this should succeed because we have an open transaction
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SELECT dblink_exec('myconn','DECLARE xact_test CURSOR FOR SELECT * FROM foo');
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-- commit remote transaction
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SELECT dblink_exec('myconn','COMMIT');
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-- test automatic transactions for multiple cursor opens
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SELECT dblink_open('myconn','rmt_foo_cursor','SELECT * FROM foo');
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-- the second cursor
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SELECT dblink_open('myconn','rmt_foo_cursor2','SELECT * FROM foo');
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-- this should not commit the transaction
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SELECT dblink_close('myconn','rmt_foo_cursor2');
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-- this should succeed because we have an open transaction
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SELECT dblink_exec('myconn','DECLARE xact_test CURSOR FOR SELECT * FROM foo');
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-- this should commit the transaction
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SELECT dblink_close('myconn','rmt_foo_cursor');
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-- this should fail because there is no open transaction
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SELECT dblink_exec('myconn','DECLARE xact_test CURSOR FOR SELECT * FROM foo');
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-- reset remote transaction state
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SELECT dblink_exec('myconn','ABORT');
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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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-- 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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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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-- 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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-- 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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-- reset remote transaction state
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SELECT dblink_exec('myconn','ABORT');
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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('myconn','rmt_foo_cursor',4) AS t(a int, b text, c text[]);
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-- close the named persistent connection
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SELECT dblink_disconnect('myconn');
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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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-- create a named persistent connection
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SELECT dblink_connect('myconn',connection_parameters());
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-- put more data into our table, using named 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('myconn','INSERT INTO foo VALUES(11,''l'',''{"a11","b11","c11"}'')'),1,6);
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-- let's see it
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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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-- change some data
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SELECT dblink_exec('myconn','UPDATE foo SET f3[2] = ''b99'' WHERE f1 = 11');
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-- let's see it
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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 a = 11;
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-- delete some data
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SELECT dblink_exec('myconn','DELETE FROM foo WHERE f1 = 11');
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-- let's see it
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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 a = 11;
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-- close the named persistent connection
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SELECT dblink_disconnect('myconn');
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-- close the named persistent connection again
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-- should get 'connection "myconn" not available' error
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SELECT dblink_disconnect('myconn');
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-- test asynchronous queries
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SELECT dblink_connect('dtest1', connection_parameters());
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SELECT * from
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dblink_send_query('dtest1', 'select * from foo where f1 < 3') as t1;
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SELECT dblink_connect('dtest2', connection_parameters());
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SELECT * from
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dblink_send_query('dtest2', 'select * from foo where f1 > 2 and f1 < 7') as t1;
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SELECT dblink_connect('dtest3', connection_parameters());
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SELECT * from
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dblink_send_query('dtest3', 'select * from foo where f1 > 6') as t1;
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CREATE TEMPORARY TABLE result AS
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(SELECT * from dblink_get_result('dtest1') as t1(f1 int, f2 text, f3 text[]))
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UNION
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(SELECT * from dblink_get_result('dtest2') as t2(f1 int, f2 text, f3 text[]))
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UNION
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(SELECT * from dblink_get_result('dtest3') as t3(f1 int, f2 text, f3 text[]))
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ORDER by f1;
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-- dblink_get_connections returns an array with elements in a machine-dependent
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-- ordering, so we must resort to unnesting and sorting for a stable result
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create function unnest(anyarray) returns setof anyelement
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language sql strict immutable as $$
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select $1[i] from generate_series(array_lower($1,1), array_upper($1,1)) as i
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$$;
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SELECT * FROM unnest(dblink_get_connections()) ORDER BY 1;
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SELECT dblink_is_busy('dtest1');
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SELECT dblink_disconnect('dtest1');
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SELECT dblink_disconnect('dtest2');
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SELECT dblink_disconnect('dtest3');
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SELECT * from result;
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SELECT dblink_connect('dtest1', connection_parameters());
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SELECT * from
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dblink_send_query('dtest1', 'select * from foo where f1 < 3') as t1;
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SELECT dblink_cancel_query('dtest1');
|
|
SELECT dblink_error_message('dtest1');
|
|
SELECT dblink_disconnect('dtest1');
|
|
|
|
-- test foreign data wrapper functionality
|
|
CREATE ROLE regress_dblink_user;
|
|
DO $d$
|
|
BEGIN
|
|
EXECUTE $$CREATE SERVER fdtest FOREIGN DATA WRAPPER dblink_fdw
|
|
OPTIONS (dbname '$$||current_database()||$$',
|
|
port '$$||current_setting('port')||$$'
|
|
)$$;
|
|
END;
|
|
$d$;
|
|
|
|
CREATE USER MAPPING FOR public SERVER fdtest
|
|
OPTIONS (server 'localhost'); -- fail, can't specify server here
|
|
CREATE USER MAPPING FOR public SERVER fdtest OPTIONS (user :'USER');
|
|
|
|
GRANT USAGE ON FOREIGN SERVER fdtest TO regress_dblink_user;
|
|
GRANT EXECUTE ON FUNCTION dblink_connect_u(text, text) TO regress_dblink_user;
|
|
|
|
SET SESSION AUTHORIZATION regress_dblink_user;
|
|
-- should fail
|
|
SELECT dblink_connect('myconn', 'fdtest');
|
|
-- should succeed
|
|
SELECT dblink_connect_u('myconn', 'fdtest');
|
|
SELECT * FROM dblink('myconn','SELECT * FROM foo') AS t(a int, b text, c text[]);
|
|
|
|
\c - -
|
|
REVOKE USAGE ON FOREIGN SERVER fdtest FROM regress_dblink_user;
|
|
REVOKE EXECUTE ON FUNCTION dblink_connect_u(text, text) FROM regress_dblink_user;
|
|
DROP USER regress_dblink_user;
|
|
DROP USER MAPPING FOR public SERVER fdtest;
|
|
DROP SERVER fdtest;
|
|
|
|
-- test asynchronous notifications
|
|
SELECT dblink_connect(connection_parameters());
|
|
|
|
--should return listen
|
|
SELECT dblink_exec('LISTEN regression');
|
|
--should return listen
|
|
SELECT dblink_exec('LISTEN foobar');
|
|
|
|
SELECT dblink_exec('NOTIFY regression');
|
|
SELECT dblink_exec('NOTIFY foobar');
|
|
|
|
SELECT notify_name, be_pid = (select t.be_pid from dblink('select pg_backend_pid()') as t(be_pid int)) AS is_self_notify, extra from dblink_get_notify();
|
|
|
|
SELECT * from dblink_get_notify();
|
|
|
|
SELECT dblink_disconnect();
|
|
|
|
-- test dropped columns in dblink_build_sql_insert, dblink_build_sql_update
|
|
CREATE TEMP TABLE test_dropped
|
|
(
|
|
col1 INT NOT NULL DEFAULT 111,
|
|
id SERIAL PRIMARY KEY,
|
|
col2 INT NOT NULL DEFAULT 112,
|
|
col2b INT NOT NULL DEFAULT 113
|
|
);
|
|
|
|
INSERT INTO test_dropped VALUES(default);
|
|
|
|
ALTER TABLE test_dropped
|
|
DROP COLUMN col1,
|
|
DROP COLUMN col2,
|
|
ADD COLUMN col3 VARCHAR(10) NOT NULL DEFAULT 'foo',
|
|
ADD COLUMN col4 INT NOT NULL DEFAULT 42;
|
|
|
|
SELECT dblink_build_sql_insert('test_dropped', '1', 1,
|
|
ARRAY['1'::TEXT], ARRAY['2'::TEXT]);
|
|
|
|
SELECT dblink_build_sql_update('test_dropped', '1', 1,
|
|
ARRAY['1'::TEXT], ARRAY['2'::TEXT]);
|
|
|
|
SELECT dblink_build_sql_delete('test_dropped', '1', 1,
|
|
ARRAY['2'::TEXT]);
|
|
|
|
-- test local mimicry of remote GUC values that affect datatype I/O
|
|
SET datestyle = ISO, MDY;
|
|
SET intervalstyle = postgres;
|
|
SET timezone = UTC;
|
|
SELECT dblink_connect('myconn',connection_parameters());
|
|
SELECT dblink_exec('myconn', 'SET datestyle = GERMAN, DMY;');
|
|
|
|
-- single row synchronous case
|
|
SELECT *
|
|
FROM dblink('myconn',
|
|
'SELECT * FROM (VALUES (''12.03.2013 00:00:00+00'')) t')
|
|
AS t(a timestamptz);
|
|
|
|
-- multi-row synchronous case
|
|
SELECT *
|
|
FROM dblink('myconn',
|
|
'SELECT * FROM
|
|
(VALUES (''12.03.2013 00:00:00+00''),
|
|
(''12.03.2013 00:00:00+00'')) t')
|
|
AS t(a timestamptz);
|
|
|
|
-- single-row asynchronous case
|
|
SELECT *
|
|
FROM dblink_send_query('myconn',
|
|
'SELECT * FROM
|
|
(VALUES (''12.03.2013 00:00:00+00'')) t');
|
|
CREATE TEMPORARY TABLE result AS
|
|
(SELECT * from dblink_get_result('myconn') as t(t timestamptz))
|
|
UNION ALL
|
|
(SELECT * from dblink_get_result('myconn') as t(t timestamptz));
|
|
SELECT * FROM result;
|
|
DROP TABLE result;
|
|
|
|
-- multi-row asynchronous case
|
|
SELECT *
|
|
FROM dblink_send_query('myconn',
|
|
'SELECT * FROM
|
|
(VALUES (''12.03.2013 00:00:00+00''),
|
|
(''12.03.2013 00:00:00+00'')) t');
|
|
CREATE TEMPORARY TABLE result AS
|
|
(SELECT * from dblink_get_result('myconn') as t(t timestamptz))
|
|
UNION ALL
|
|
(SELECT * from dblink_get_result('myconn') as t(t timestamptz))
|
|
UNION ALL
|
|
(SELECT * from dblink_get_result('myconn') as t(t timestamptz));
|
|
SELECT * FROM result;
|
|
DROP TABLE result;
|
|
|
|
-- Try an ambiguous interval
|
|
SELECT dblink_exec('myconn', 'SET intervalstyle = sql_standard;');
|
|
SELECT *
|
|
FROM dblink('myconn',
|
|
'SELECT * FROM (VALUES (''-1 2:03:04'')) i')
|
|
AS i(i interval);
|
|
|
|
-- Try swapping to another format to ensure the GUCs are tracked
|
|
-- properly through a change.
|
|
CREATE TEMPORARY TABLE result (t timestamptz);
|
|
|
|
SELECT dblink_exec('myconn', 'SET datestyle = ISO, MDY;');
|
|
INSERT INTO result
|
|
SELECT *
|
|
FROM dblink('myconn',
|
|
'SELECT * FROM (VALUES (''03.12.2013 00:00:00+00'')) t')
|
|
AS t(a timestamptz);
|
|
|
|
SELECT dblink_exec('myconn', 'SET datestyle = GERMAN, DMY;');
|
|
INSERT INTO result
|
|
SELECT *
|
|
FROM dblink('myconn',
|
|
'SELECT * FROM (VALUES (''12.03.2013 00:00:00+00'')) t')
|
|
AS t(a timestamptz);
|
|
|
|
SELECT * FROM result;
|
|
|
|
DROP TABLE result;
|
|
|
|
-- Check error throwing in dblink_fetch
|
|
SELECT dblink_open('myconn','error_cursor',
|
|
'SELECT * FROM (VALUES (''1''), (''not an int'')) AS t(text);');
|
|
SELECT *
|
|
FROM dblink_fetch('myconn','error_cursor', 1) AS t(i int);
|
|
SELECT *
|
|
FROM dblink_fetch('myconn','error_cursor', 1) AS t(i int);
|
|
|
|
-- Make sure that the local settings have retained their values in spite
|
|
-- of shenanigans on the connection.
|
|
SHOW datestyle;
|
|
SHOW intervalstyle;
|
|
|
|
-- Clean up GUC-setting tests
|
|
SELECT dblink_disconnect('myconn');
|
|
RESET datestyle;
|
|
RESET intervalstyle;
|
|
RESET timezone;
|