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Update dblink extension for parallel query.

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Almost all functions provided by this extension are PARALLEL
RESTRICTED.  Mostly, that's because the leader's TCP connections won't
be shared with the workers, but in some cases like dblink_get_pkey
it's because they obtain locks which might be released early if taken
within a parallel worker.  dblink_fdw_validator probably can't be used
in a query anyway, but there would be no problem from the point of
view of parallel query if it were, so it's PARALLEL SAFE.

Andreas Karlsson
This commit is contained in:
Robert Haas 2016-06-17 15:09:57 -04:00
parent 177c56d608
commit 20eb2731b7
4 changed files with 91 additions and 44 deletions
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3
contrib/dblink/Makefile
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@ -6,7 +6,8 @@ PG_CPPFLAGS = -I$(libpq_srcdir)
SHLIB_LINK = $(libpq)
EXTENSION = dblink
DATA = dblink--1.1.sql dblink--1.0--1.1.sql dblink--unpackaged--1.0.sql
DATA = dblink--1.2.sql dblink--1.1--1.2.sql dblink--1.0--1.1.sql \
dblink--unpackaged--1.0.sql
PGFILEDESC = "dblink - connect to other PostgreSQL databases"
REGRESS = paths dblink

46
contrib/dblink/dblink--1.1--1.2.sql Normal file
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@ -0,0 +1,46 @@
/* contrib/dblink/dblink--1.1--1.2.sql */
-- complain if script is sourced in psql, rather than via ALTER EXTENSION
\echo Use "ALTER EXTENSION dblink UPDATE TO '1.2'" to load this file. \quit
ALTER FUNCTION dblink_connect(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_connect(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_connect_u(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_connect_u(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_disconnect() PARALLEL RESTRICTED;
ALTER FUNCTION dblink_disconnect(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_open(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_open(text, text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_open(text, text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_open(text, text, text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_fetch(text, int) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_fetch(text, int, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_fetch(text, text, int) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_fetch(text, text, int, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_close(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_close(text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_close(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_close(text, text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink(text, text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink(text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_exec(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_exec(text, text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_exec(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_exec(text, boolean) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_get_pkey(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_build_sql_insert(text, int2vector, int, _text, _text) PARALLEL SAFE;
ALTER FUNCTION dblink_build_sql_delete(text, int2vector, int, _text) PARALLEL SAFE;
ALTER FUNCTION dblink_build_sql_update(text, int2vector, int, _text, _text) PARALLEL SAFE;
ALTER FUNCTION dblink_current_query() PARALLEL RESTRICTED;
ALTER FUNCTION dblink_send_query(text, text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_is_busy(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_get_result(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_get_result(text, bool) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_get_connections() PARALLEL RESTRICTED;
ALTER FUNCTION dblink_cancel_query(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_error_message(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_get_notify() PARALLEL RESTRICTED;
ALTER FUNCTION dblink_get_notify(text) PARALLEL RESTRICTED;
ALTER FUNCTION dblink_fdw_validator(text[], oid) PARALLEL SAFE;

84
contrib/dblink/dblink--1.1.sql → contrib/dblink/dblink--1.2.sql
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@ -1,4 +1,4 @@
/* contrib/dblink/dblink--1.1.sql */
/* contrib/dblink/dblink--1.2.sql */
-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION dblink" to load this file. \quit
@ -8,12 +8,12 @@
CREATE FUNCTION dblink_connect (text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_connect'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_connect (text, text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_connect'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
-- dblink_connect_u allows non-superusers to use
-- non-password authenticated connections, but initially
@ -21,12 +21,12 @@ LANGUAGE C STRICT;
CREATE FUNCTION dblink_connect_u (text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_connect'
LANGUAGE C STRICT SECURITY DEFINER;
LANGUAGE C STRICT PARALLEL RESTRICTED SECURITY DEFINER;
CREATE FUNCTION dblink_connect_u (text, text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_connect'
LANGUAGE C STRICT SECURITY DEFINER;
LANGUAGE C STRICT PARALLEL RESTRICTED SECURITY DEFINER;
REVOKE ALL ON FUNCTION dblink_connect_u (text) FROM public;
REVOKE ALL ON FUNCTION dblink_connect_u (text, text) FROM public;
@ -34,174 +34,174 @@ REVOKE ALL ON FUNCTION dblink_connect_u (text, text) FROM public;
CREATE FUNCTION dblink_disconnect ()
RETURNS text
AS 'MODULE_PATHNAME','dblink_disconnect'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_disconnect (text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_disconnect'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_open (text, text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_open'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_open (text, text, boolean)
RETURNS text
AS 'MODULE_PATHNAME','dblink_open'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_open (text, text, text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_open'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_open (text, text, text, boolean)
RETURNS text
AS 'MODULE_PATHNAME','dblink_open'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_fetch (text, int)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_fetch'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_fetch (text, int, boolean)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_fetch'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_fetch (text, text, int)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_fetch'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_fetch (text, text, int, boolean)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_fetch'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_close (text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_close'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_close (text, boolean)
RETURNS text
AS 'MODULE_PATHNAME','dblink_close'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_close (text, text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_close'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_close (text, text, boolean)
RETURNS text
AS 'MODULE_PATHNAME','dblink_close'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink (text, text)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_record'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink (text, text, boolean)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_record'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink (text)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_record'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink (text, boolean)
RETURNS setof record
AS 'MODULE_PATHNAME','dblink_record'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_exec (text, text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_exec'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_exec (text, text, boolean)
RETURNS text
AS 'MODULE_PATHNAME','dblink_exec'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_exec (text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_exec'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_exec (text,boolean)
RETURNS text
AS 'MODULE_PATHNAME','dblink_exec'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE TYPE dblink_pkey_results AS (position int, colname text);
CREATE FUNCTION dblink_get_pkey (text)
RETURNS setof dblink_pkey_results
AS 'MODULE_PATHNAME','dblink_get_pkey'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_build_sql_insert (text, int2vector, int, _text, _text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_build_sql_insert'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL SAFE;
CREATE FUNCTION dblink_build_sql_delete (text, int2vector, int, _text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_build_sql_delete'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL SAFE;
CREATE FUNCTION dblink_build_sql_update (text, int2vector, int, _text, _text)
RETURNS text
AS 'MODULE_PATHNAME','dblink_build_sql_update'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL SAFE;
CREATE FUNCTION dblink_current_query ()
RETURNS text
AS 'MODULE_PATHNAME','dblink_current_query'
LANGUAGE C;
LANGUAGE C PARALLEL RESTRICTED;
CREATE FUNCTION dblink_send_query(text, text)
RETURNS int4
AS 'MODULE_PATHNAME', 'dblink_send_query'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_is_busy(text)
RETURNS int4
AS 'MODULE_PATHNAME', 'dblink_is_busy'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_get_result(text)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'dblink_get_result'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_get_result(text, bool)
RETURNS SETOF record
AS 'MODULE_PATHNAME', 'dblink_get_result'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_get_connections()
RETURNS text[]
AS 'MODULE_PATHNAME', 'dblink_get_connections'
LANGUAGE C;
LANGUAGE C PARALLEL RESTRICTED;
CREATE FUNCTION dblink_cancel_query(text)
RETURNS text
AS 'MODULE_PATHNAME', 'dblink_cancel_query'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_error_message(text)
RETURNS text
AS 'MODULE_PATHNAME', 'dblink_error_message'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_get_notify(
OUT notify_name TEXT,
@ -210,7 +210,7 @@ CREATE FUNCTION dblink_get_notify(
)
RETURNS setof record
AS 'MODULE_PATHNAME', 'dblink_get_notify'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
CREATE FUNCTION dblink_get_notify(
conname TEXT,
@ -220,7 +220,7 @@ CREATE FUNCTION dblink_get_notify(
)
RETURNS setof record
AS 'MODULE_PATHNAME', 'dblink_get_notify'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL RESTRICTED;
/* New stuff in 1.1 begins here */
@ -230,6 +230,6 @@ CREATE FUNCTION dblink_fdw_validator(
)
RETURNS void
AS 'MODULE_PATHNAME', 'dblink_fdw_validator'
LANGUAGE C STRICT;
LANGUAGE C STRICT PARALLEL SAFE;
CREATE FOREIGN DATA WRAPPER dblink_fdw VALIDATOR dblink_fdw_validator;

2
contrib/dblink/dblink.control
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@ -1,5 +1,5 @@
# dblink extension
comment = 'connect to other PostgreSQL databases from within a database'
default_version = '1.1'
default_version = '1.2'
module_pathname = '$libdir/dblink'
relocatable = true