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Allow insert and update tuple routing and COPY for foreign tables.

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Also enable this for postgres_fdw.

Etsuro Fujita, based on an earlier patch by Amit Langote. The larger
patch series of which this is a part has been reviewed by Amit
Langote, David Fetter, Maksim Milyutin, Álvaro Herrera, Stephen Frost,
and me.  Minor documentation changes to the final version by me.

Discussion: http://postgr.es/m/29906a26-da12-8c86-4fb9-d8f88442f2b9@lab.ntt.co.jp
This commit is contained in:
Robert Haas
2018-04-06 19:16:11 -04:00
parent cb1ff1e5af
commit 3d956d9562
16 changed files with 924 additions and 91 deletions
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5
contrib/file_fdw/input/file_fdw.source
View File

@ -136,6 +136,11 @@ DELETE FROM agg_csv WHERE a = 100;
-- but this should be allowed
SELECT * FROM agg_csv FOR UPDATE;
-- copy from isn't supported either
COPY agg_csv FROM STDIN;
12 3.4
\.
-- constraint exclusion tests
\t on
EXPLAIN (VERBOSE, COSTS FALSE) SELECT * FROM agg_csv WHERE a < 0;

9
contrib/file_fdw/output/file_fdw.source
View File

@ -221,6 +221,9 @@ SELECT * FROM agg_csv FOR UPDATE;
42 | 324.78
(3 rows)
-- copy from isn't supported either
COPY agg_csv FROM STDIN;
ERROR: cannot insert into foreign table "agg_csv"
-- constraint exclusion tests
\t on
EXPLAIN (VERBOSE, COSTS FALSE) SELECT * FROM agg_csv WHERE a < 0;
@ -315,7 +318,7 @@ SELECT tableoid::regclass, * FROM p2;
(0 rows)
COPY pt FROM '@abs_srcdir@/data/list2.bad' with (format 'csv', delimiter ','); -- ERROR
ERROR: cannot route inserted tuples to a foreign table
ERROR: cannot insert into foreign table "p1"
CONTEXT: COPY pt, line 2: "1,qux"
COPY pt FROM '@abs_srcdir@/data/list2.csv' with (format 'csv', delimiter ',');
SELECT tableoid::regclass, * FROM pt;
@ -342,10 +345,10 @@ SELECT tableoid::regclass, * FROM p2;
(2 rows)
INSERT INTO pt VALUES (1, 'xyzzy'); -- ERROR
ERROR: cannot route inserted tuples to a foreign table
ERROR: cannot insert into foreign table "p1"
INSERT INTO pt VALUES (2, 'xyzzy');
UPDATE pt set a = 1 where a = 2; -- ERROR
ERROR: cannot route inserted tuples to a foreign table
ERROR: cannot insert into foreign table "p1"
SELECT tableoid::regclass, * FROM pt;
tableoid | a | b
----------+---+-------