postgresql/contrib/file_fdw/output/file_fdw.source
Tom Lane cb1ca4d800 Allow foreign tables to participate in inheritance.
Foreign tables can now be inheritance children, or parents.  Much of the
system was already ready for this, but we had to fix a few things of
course, mostly in the area of planner and executor handling of row locks.

As side effects of this, allow foreign tables to have NOT VALID CHECK
constraints (and hence to accept ALTER ... VALIDATE CONSTRAINT), and to
accept ALTER SET STORAGE and ALTER SET WITH/WITHOUT OIDS.  Continuing to
disallow these things would've required bizarre and inconsistent special
cases in inheritance behavior.  Since foreign tables don't enforce CHECK
constraints anyway, a NOT VALID one is a complete no-op, but that doesn't
mean we shouldn't allow it.  And it's possible that some FDWs might have
use for SET STORAGE or SET WITH OIDS, though doubtless they will be no-ops
for most.

An additional change in support of this is that when a ModifyTable node
has multiple target tables, they will all now be explicitly identified
in EXPLAIN output, for example:

 Update on pt1  (cost=0.00..321.05 rows=3541 width=46)
   Update on pt1
   Foreign Update on ft1
   Foreign Update on ft2
   Update on child3
   ->  Seq Scan on pt1  (cost=0.00..0.00 rows=1 width=46)
   ->  Foreign Scan on ft1  (cost=100.00..148.03 rows=1170 width=46)
   ->  Foreign Scan on ft2  (cost=100.00..148.03 rows=1170 width=46)
   ->  Seq Scan on child3  (cost=0.00..25.00 rows=1200 width=46)

This was done mainly to provide an unambiguous place to attach "Remote SQL"
fields, but it is useful for inherited updates even when no foreign tables
are involved.

Shigeru Hanada and Etsuro Fujita, reviewed by Ashutosh Bapat and Kyotaro
Horiguchi, some additional hacking by me
2015-03-22 13:53:21 -04:00

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--
-- Test foreign-data wrapper file_fdw.
--
-- Clean up in case a prior regression run failed
SET client_min_messages TO 'error';
DROP ROLE IF EXISTS file_fdw_superuser, file_fdw_user, no_priv_user;
RESET client_min_messages;
CREATE ROLE file_fdw_superuser LOGIN SUPERUSER; -- is a superuser
CREATE ROLE file_fdw_user LOGIN; -- has priv and user mapping
CREATE ROLE no_priv_user LOGIN; -- has priv but no user mapping
-- Install file_fdw
CREATE EXTENSION file_fdw;
-- file_fdw_superuser owns fdw-related objects
SET ROLE file_fdw_superuser;
CREATE SERVER file_server FOREIGN DATA WRAPPER file_fdw;
-- privilege tests
SET ROLE file_fdw_user;
CREATE FOREIGN DATA WRAPPER file_fdw2 HANDLER file_fdw_handler VALIDATOR file_fdw_validator; -- ERROR
ERROR: permission denied to create foreign-data wrapper "file_fdw2"
HINT: Must be superuser to create a foreign-data wrapper.
CREATE SERVER file_server2 FOREIGN DATA WRAPPER file_fdw; -- ERROR
ERROR: permission denied for foreign-data wrapper file_fdw
CREATE USER MAPPING FOR file_fdw_user SERVER file_server; -- ERROR
ERROR: permission denied for foreign server file_server
SET ROLE file_fdw_superuser;
GRANT USAGE ON FOREIGN SERVER file_server TO file_fdw_user;
SET ROLE file_fdw_user;
CREATE USER MAPPING FOR file_fdw_user SERVER file_server;
-- create user mappings and grant privilege to test users
SET ROLE file_fdw_superuser;
CREATE USER MAPPING FOR file_fdw_superuser SERVER file_server;
CREATE USER MAPPING FOR no_priv_user SERVER file_server;
-- validator tests
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'xml'); -- ERROR
ERROR: COPY format "xml" not recognized
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', header 'true'); -- ERROR
ERROR: COPY HEADER available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', quote ':'); -- ERROR
ERROR: COPY quote available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', escape ':'); -- ERROR
ERROR: COPY escape available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'binary', header 'true'); -- ERROR
ERROR: COPY HEADER available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'binary', quote ':'); -- ERROR
ERROR: COPY quote available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'binary', escape ':'); -- ERROR
ERROR: COPY escape available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', delimiter 'a'); -- ERROR
ERROR: COPY delimiter cannot be "a"
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', escape '-'); -- ERROR
ERROR: COPY escape available only in CSV mode
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', quote '-', null '=-='); -- ERROR
ERROR: CSV quote character must not appear in the NULL specification
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', delimiter '-', null '=-='); -- ERROR
ERROR: COPY delimiter must not appear in the NULL specification
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', delimiter '-', quote '-'); -- ERROR
ERROR: COPY delimiter and quote must be different
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', delimiter '---'); -- ERROR
ERROR: COPY delimiter must be a single one-byte character
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', quote '---'); -- ERROR
ERROR: COPY quote must be a single one-byte character
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', escape '---'); -- ERROR
ERROR: COPY escape must be a single one-byte character
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', delimiter '\'); -- ERROR
ERROR: COPY delimiter cannot be "\"
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', delimiter '.'); -- ERROR
ERROR: COPY delimiter cannot be "."
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', delimiter '1'); -- ERROR
ERROR: COPY delimiter cannot be "1"
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'text', delimiter 'a'); -- ERROR
ERROR: COPY delimiter cannot be "a"
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', delimiter '
'); -- ERROR
ERROR: COPY delimiter cannot be newline or carriage return
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (format 'csv', null '
'); -- ERROR
ERROR: COPY null representation cannot use newline or carriage return
CREATE FOREIGN TABLE tbl () SERVER file_server; -- ERROR
ERROR: filename is required for file_fdw foreign tables
CREATE FOREIGN TABLE agg_text (
a int2 CHECK (a >= 0),
b float4
) SERVER file_server
OPTIONS (format 'text', filename '@abs_srcdir@/data/agg.data', delimiter ' ', null '\N');
GRANT SELECT ON agg_text TO file_fdw_user;
CREATE FOREIGN TABLE agg_csv (
a int2,
b float4
) SERVER file_server
OPTIONS (format 'csv', filename '@abs_srcdir@/data/agg.csv', header 'true', delimiter ';', quote '@', escape '"', null '');
ALTER FOREIGN TABLE agg_csv ADD CHECK (a >= 0);
CREATE FOREIGN TABLE agg_bad (
a int2,
b float4
) SERVER file_server
OPTIONS (format 'csv', filename '@abs_srcdir@/data/agg.bad', header 'true', delimiter ';', quote '@', escape '"', null '');
ALTER FOREIGN TABLE agg_bad ADD CHECK (a >= 0);
-- per-column options tests
CREATE FOREIGN TABLE text_csv (
word1 text OPTIONS (force_not_null 'true'),
word2 text OPTIONS (force_not_null 'off'),
word3 text OPTIONS (force_null 'true'),
word4 text OPTIONS (force_null 'off')
) SERVER file_server
OPTIONS (format 'text', filename '@abs_srcdir@/data/text.csv', null 'NULL');
SELECT * FROM text_csv; -- ERROR
ERROR: COPY force not null available only in CSV mode
ALTER FOREIGN TABLE text_csv OPTIONS (SET format 'csv');
\pset null _null_
SELECT * FROM text_csv;
word1 | word2 | word3 | word4
-------+--------+--------+--------
AAA | aaa | 123 |
XYZ | xyz | | 321
NULL | _null_ | _null_ | _null_
NULL | _null_ | _null_ | _null_
ABC | abc | |
(5 rows)
-- force_not_null and force_null can be used together on the same column
ALTER FOREIGN TABLE text_csv ALTER COLUMN word1 OPTIONS (force_null 'true');
ALTER FOREIGN TABLE text_csv ALTER COLUMN word3 OPTIONS (force_not_null 'true');
-- force_not_null is not allowed to be specified at any foreign object level:
ALTER FOREIGN DATA WRAPPER file_fdw OPTIONS (ADD force_not_null '*'); -- ERROR
ERROR: invalid option "force_not_null"
HINT: There are no valid options in this context.
ALTER SERVER file_server OPTIONS (ADD force_not_null '*'); -- ERROR
ERROR: invalid option "force_not_null"
HINT: There are no valid options in this context.
CREATE USER MAPPING FOR public SERVER file_server OPTIONS (force_not_null '*'); -- ERROR
ERROR: invalid option "force_not_null"
HINT: There are no valid options in this context.
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (force_not_null '*'); -- ERROR
ERROR: invalid option "force_not_null"
HINT: Valid options in this context are: filename, format, header, delimiter, quote, escape, null, encoding
-- force_null is not allowed to be specified at any foreign object level:
ALTER FOREIGN DATA WRAPPER file_fdw OPTIONS (ADD force_null '*'); -- ERROR
ERROR: invalid option "force_null"
HINT: There are no valid options in this context.
ALTER SERVER file_server OPTIONS (ADD force_null '*'); -- ERROR
ERROR: invalid option "force_null"
HINT: There are no valid options in this context.
CREATE USER MAPPING FOR public SERVER file_server OPTIONS (force_null '*'); -- ERROR
ERROR: invalid option "force_null"
HINT: There are no valid options in this context.
CREATE FOREIGN TABLE tbl () SERVER file_server OPTIONS (force_null '*'); -- ERROR
ERROR: invalid option "force_null"
HINT: Valid options in this context are: filename, format, header, delimiter, quote, escape, null, encoding
-- basic query tests
SELECT * FROM agg_text WHERE b > 10.0 ORDER BY a;
a | b
-----+--------
42 | 324.78
100 | 99.097
(2 rows)
SELECT * FROM agg_csv ORDER BY a;
a | b
-----+---------
0 | 0.09561
42 | 324.78
100 | 99.097
(3 rows)
SELECT * FROM agg_csv c JOIN agg_text t ON (t.a = c.a) ORDER BY c.a;
a | b | a | b
-----+---------+-----+---------
0 | 0.09561 | 0 | 0.09561
42 | 324.78 | 42 | 324.78
100 | 99.097 | 100 | 99.097
(3 rows)
-- error context report tests
SELECT * FROM agg_bad; -- ERROR
ERROR: invalid input syntax for type real: "aaa"
CONTEXT: COPY agg_bad, line 3, column b: "aaa"
-- misc query tests
\t on
EXPLAIN (VERBOSE, COSTS FALSE) SELECT * FROM agg_csv;
Foreign Scan on public.agg_csv
Output: a, b
Foreign File: @abs_srcdir@/data/agg.csv
\t off
PREPARE st(int) AS SELECT * FROM agg_csv WHERE a = $1;
EXECUTE st(100);
a | b
-----+--------
100 | 99.097
(1 row)
EXECUTE st(100);
a | b
-----+--------
100 | 99.097
(1 row)
DEALLOCATE st;
-- tableoid
SELECT tableoid::regclass, b FROM agg_csv;
tableoid | b
----------+---------
agg_csv | 99.097
agg_csv | 0.09561
agg_csv | 324.78
(3 rows)
-- updates aren't supported
INSERT INTO agg_csv VALUES(1,2.0);
ERROR: cannot insert into foreign table "agg_csv"
UPDATE agg_csv SET a = 1;
ERROR: cannot update foreign table "agg_csv"
DELETE FROM agg_csv WHERE a = 100;
ERROR: cannot delete from foreign table "agg_csv"
-- but this should be allowed
SELECT * FROM agg_csv FOR UPDATE;
a | b
-----+---------
100 | 99.097
0 | 0.09561
42 | 324.78
(3 rows)
-- constraint exclusion tests
\t on
EXPLAIN (VERBOSE, COSTS FALSE) SELECT * FROM agg_csv WHERE a < 0;
Foreign Scan on public.agg_csv
Output: a, b
Filter: (agg_csv.a < 0)
Foreign File: @abs_srcdir@/data/agg.csv
\t off
SELECT * FROM agg_csv WHERE a < 0;
a | b
---+---
(0 rows)
SET constraint_exclusion = 'on';
\t on
EXPLAIN (VERBOSE, COSTS FALSE) SELECT * FROM agg_csv WHERE a < 0;
Result
Output: a, b
One-Time Filter: false
\t off
SELECT * FROM agg_csv WHERE a < 0;
a | b
---+---
(0 rows)
RESET constraint_exclusion;
-- table inheritance tests
CREATE TABLE agg (a int2, b float4);
ALTER FOREIGN TABLE agg_csv INHERIT agg;
SELECT tableoid::regclass, * FROM agg;
tableoid | a | b
----------+-----+---------
agg_csv | 100 | 99.097
agg_csv | 0 | 0.09561
agg_csv | 42 | 324.78
(3 rows)
SELECT tableoid::regclass, * FROM agg_csv;
tableoid | a | b
----------+-----+---------
agg_csv | 100 | 99.097
agg_csv | 0 | 0.09561
agg_csv | 42 | 324.78
(3 rows)
SELECT tableoid::regclass, * FROM ONLY agg;
tableoid | a | b
----------+---+---
(0 rows)
-- updates aren't supported
UPDATE agg SET a = 1;
ERROR: cannot update foreign table "agg_csv"
DELETE FROM agg WHERE a = 100;
ERROR: cannot delete from foreign table "agg_csv"
-- but this should be allowed
SELECT tableoid::regclass, * FROM agg FOR UPDATE;
tableoid | a | b
----------+-----+---------
agg_csv | 100 | 99.097
agg_csv | 0 | 0.09561
agg_csv | 42 | 324.78
(3 rows)
ALTER FOREIGN TABLE agg_csv NO INHERIT agg;
DROP TABLE agg;
-- privilege tests
SET ROLE file_fdw_superuser;
SELECT * FROM agg_text ORDER BY a;
a | b
-----+---------
0 | 0.09561
42 | 324.78
56 | 7.8
100 | 99.097
(4 rows)
SET ROLE file_fdw_user;
SELECT * FROM agg_text ORDER BY a;
a | b
-----+---------
0 | 0.09561
42 | 324.78
56 | 7.8
100 | 99.097
(4 rows)
SET ROLE no_priv_user;
SELECT * FROM agg_text ORDER BY a; -- ERROR
ERROR: permission denied for relation agg_text
SET ROLE file_fdw_user;
\t on
EXPLAIN (VERBOSE, COSTS FALSE) SELECT * FROM agg_text WHERE a > 0;
Foreign Scan on public.agg_text
Output: a, b
Filter: (agg_text.a > 0)
Foreign File: @abs_srcdir@/data/agg.data
\t off
-- privilege tests for object
SET ROLE file_fdw_superuser;
ALTER FOREIGN TABLE agg_text OWNER TO file_fdw_user;
ALTER FOREIGN TABLE agg_text OPTIONS (SET format 'text');
SET ROLE file_fdw_user;
ALTER FOREIGN TABLE agg_text OPTIONS (SET format 'text');
ERROR: only superuser can change options of a file_fdw foreign table
SET ROLE file_fdw_superuser;
-- cleanup
RESET ROLE;
DROP EXTENSION file_fdw CASCADE;
NOTICE: drop cascades to 8 other objects
DETAIL: drop cascades to server file_server
drop cascades to user mapping for file_fdw_user on server file_server
drop cascades to user mapping for file_fdw_superuser on server file_server
drop cascades to user mapping for no_priv_user on server file_server
drop cascades to foreign table agg_text
drop cascades to foreign table agg_csv
drop cascades to foreign table agg_bad
drop cascades to foreign table text_csv
DROP ROLE file_fdw_superuser, file_fdw_user, no_priv_user;