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The newly added ON CONFLICT clause allows to specify an alternative to raising a unique or exclusion constraint violation error when inserting. ON CONFLICT refers to constraints that can either be specified using a inference clause (by specifying the columns of a unique constraint) or by naming a unique or exclusion constraint. DO NOTHING avoids the constraint violation, without touching the pre-existing row. DO UPDATE SET ... [WHERE ...] updates the pre-existing tuple, and has access to both the tuple proposed for insertion and the existing tuple; the optional WHERE clause can be used to prevent an update from being executed. The UPDATE SET and WHERE clauses have access to the tuple proposed for insertion using the "magic" EXCLUDED alias, and to the pre-existing tuple using the table name or its alias. This feature is often referred to as upsert. This is implemented using a new infrastructure called "speculative insertion". It is an optimistic variant of regular insertion that first does a pre-check for existing tuples and then attempts an insert. If a violating tuple was inserted concurrently, the speculatively inserted tuple is deleted and a new attempt is made. If the pre-check finds a matching tuple the alternative DO NOTHING or DO UPDATE action is taken. If the insertion succeeds without detecting a conflict, the tuple is deemed inserted. To handle the possible ambiguity between the excluded alias and a table named excluded, and for convenience with long relation names, INSERT INTO now can alias its target table. Bumps catversion as stored rules change. Author: Peter Geoghegan, with significant contributions from Heikki Linnakangas and Andres Freund. Testing infrastructure by Jeff Janes. Reviewed-By: Heikki Linnakangas, Andres Freund, Robert Haas, Simon Riggs, Dean Rasheed, Stephen Frost and many others.
837 lines
29 KiB
PL/PgSQL
837 lines
29 KiB
PL/PgSQL
-- ===================================================================
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-- create FDW objects
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-- ===================================================================
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CREATE EXTENSION postgres_fdw;
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CREATE SERVER testserver1 FOREIGN DATA WRAPPER postgres_fdw;
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DO $d$
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BEGIN
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EXECUTE $$CREATE SERVER loopback FOREIGN DATA WRAPPER postgres_fdw
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OPTIONS (dbname '$$||current_database()||$$',
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port '$$||current_setting('port')||$$'
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)$$;
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END;
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$d$;
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CREATE USER MAPPING FOR public SERVER testserver1
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OPTIONS (user 'value', password 'value');
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CREATE USER MAPPING FOR CURRENT_USER SERVER loopback;
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-- ===================================================================
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-- create objects used through FDW loopback server
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-- ===================================================================
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CREATE TYPE user_enum AS ENUM ('foo', 'bar', 'buz');
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CREATE SCHEMA "S 1";
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CREATE TABLE "S 1"."T 1" (
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"C 1" int NOT NULL,
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c2 int NOT NULL,
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c3 text,
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c4 timestamptz,
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c5 timestamp,
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c6 varchar(10),
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c7 char(10),
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c8 user_enum,
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CONSTRAINT t1_pkey PRIMARY KEY ("C 1")
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);
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CREATE TABLE "S 1"."T 2" (
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c1 int NOT NULL,
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c2 text,
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CONSTRAINT t2_pkey PRIMARY KEY (c1)
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);
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INSERT INTO "S 1"."T 1"
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SELECT id,
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id % 10,
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to_char(id, 'FM00000'),
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'1970-01-01'::timestamptz + ((id % 100) || ' days')::interval,
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'1970-01-01'::timestamp + ((id % 100) || ' days')::interval,
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id % 10,
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id % 10,
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'foo'::user_enum
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FROM generate_series(1, 1000) id;
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INSERT INTO "S 1"."T 2"
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SELECT id,
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'AAA' || to_char(id, 'FM000')
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FROM generate_series(1, 100) id;
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ANALYZE "S 1"."T 1";
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ANALYZE "S 1"."T 2";
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-- ===================================================================
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-- create foreign tables
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-- ===================================================================
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CREATE FOREIGN TABLE ft1 (
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c0 int,
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c1 int NOT NULL,
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c2 int NOT NULL,
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c3 text,
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c4 timestamptz,
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c5 timestamp,
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c6 varchar(10),
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c7 char(10) default 'ft1',
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c8 user_enum
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) SERVER loopback;
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ALTER FOREIGN TABLE ft1 DROP COLUMN c0;
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CREATE FOREIGN TABLE ft2 (
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c1 int NOT NULL,
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c2 int NOT NULL,
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cx int,
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c3 text,
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c4 timestamptz,
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c5 timestamp,
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c6 varchar(10),
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c7 char(10) default 'ft2',
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c8 user_enum
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) SERVER loopback;
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ALTER FOREIGN TABLE ft2 DROP COLUMN cx;
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-- ===================================================================
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-- tests for validator
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-- ===================================================================
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-- requiressl, krbsrvname and gsslib are omitted because they depend on
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-- configure options
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ALTER SERVER testserver1 OPTIONS (
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use_remote_estimate 'false',
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updatable 'true',
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fdw_startup_cost '123.456',
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fdw_tuple_cost '0.123',
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service 'value',
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connect_timeout 'value',
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dbname 'value',
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host 'value',
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hostaddr 'value',
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port 'value',
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--client_encoding 'value',
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application_name 'value',
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--fallback_application_name 'value',
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keepalives 'value',
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keepalives_idle 'value',
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keepalives_interval 'value',
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-- requiressl 'value',
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sslcompression 'value',
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sslmode 'value',
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sslcert 'value',
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sslkey 'value',
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sslrootcert 'value',
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sslcrl 'value'
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--requirepeer 'value',
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-- krbsrvname 'value',
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-- gsslib 'value',
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--replication 'value'
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);
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ALTER USER MAPPING FOR public SERVER testserver1
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OPTIONS (DROP user, DROP password);
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ALTER FOREIGN TABLE ft1 OPTIONS (schema_name 'S 1', table_name 'T 1');
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ALTER FOREIGN TABLE ft2 OPTIONS (schema_name 'S 1', table_name 'T 1');
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ALTER FOREIGN TABLE ft1 ALTER COLUMN c1 OPTIONS (column_name 'C 1');
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ALTER FOREIGN TABLE ft2 ALTER COLUMN c1 OPTIONS (column_name 'C 1');
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\det+
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-- Now we should be able to run ANALYZE.
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-- To exercise multiple code paths, we use local stats on ft1
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-- and remote-estimate mode on ft2.
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ANALYZE ft1;
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ALTER FOREIGN TABLE ft2 OPTIONS (use_remote_estimate 'true');
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-- ===================================================================
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-- simple queries
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-- ===================================================================
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-- single table, with/without alias
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EXPLAIN (COSTS false) SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
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SELECT * FROM ft1 ORDER BY c3, c1 OFFSET 100 LIMIT 10;
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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SELECT * FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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-- whole-row reference
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EXPLAIN (VERBOSE, COSTS false) SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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SELECT t1 FROM ft1 t1 ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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-- empty result
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SELECT * FROM ft1 WHERE false;
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-- with WHERE clause
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
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SELECT * FROM ft1 t1 WHERE t1.c1 = 101 AND t1.c6 = '1' AND t1.c7 >= '1';
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-- with FOR UPDATE/SHARE
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
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SELECT * FROM ft1 t1 WHERE c1 = 101 FOR UPDATE;
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
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SELECT * FROM ft1 t1 WHERE c1 = 102 FOR SHARE;
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-- aggregate
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SELECT COUNT(*) FROM ft1 t1;
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-- join two tables
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SELECT t1.c1 FROM ft1 t1 JOIN ft2 t2 ON (t1.c1 = t2.c1) ORDER BY t1.c3, t1.c1 OFFSET 100 LIMIT 10;
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-- subquery
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SELECT * FROM ft1 t1 WHERE t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 <= 10) ORDER BY c1;
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-- subquery+MAX
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SELECT * FROM ft1 t1 WHERE t1.c3 = (SELECT MAX(c3) FROM ft2 t2) ORDER BY c1;
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-- used in CTE
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WITH t1 AS (SELECT * FROM ft1 WHERE c1 <= 10) SELECT t2.c1, t2.c2, t2.c3, t2.c4 FROM t1, ft2 t2 WHERE t1.c1 = t2.c1 ORDER BY t1.c1;
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-- fixed values
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SELECT 'fixed', NULL FROM ft1 t1 WHERE c1 = 1;
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-- user-defined operator/function
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CREATE FUNCTION postgres_fdw_abs(int) RETURNS int AS $$
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BEGIN
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RETURN abs($1);
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END
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$$ LANGUAGE plpgsql IMMUTABLE;
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CREATE OPERATOR === (
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LEFTARG = int,
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RIGHTARG = int,
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PROCEDURE = int4eq,
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COMMUTATOR = ===,
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NEGATOR = !==
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);
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = postgres_fdw_abs(t1.c2);
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 === t1.c2;
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = abs(t1.c2);
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = t1.c2;
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-- ===================================================================
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-- WHERE with remotely-executable conditions
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-- ===================================================================
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 1; -- Var, OpExpr(b), Const
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE t1.c1 = 100 AND t1.c2 = 0; -- BoolExpr
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 IS NULL; -- NullTest
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 IS NOT NULL; -- NullTest
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE round(abs(c1), 0) = 1; -- FuncExpr
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = -c1; -- OpExpr(l)
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE 1 = c1!; -- OpExpr(r)
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE (c1 IS NOT NULL) IS DISTINCT FROM (c1 IS NOT NULL); -- DistinctExpr
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = ANY(ARRAY[c2, 1, c1 + 0]); -- ScalarArrayOpExpr
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c1 = (ARRAY[c1,c2,3])[1]; -- ArrayRef
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c6 = E'foo''s\\bar'; -- check special chars
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EXPLAIN (VERBOSE, COSTS false) SELECT * FROM ft1 t1 WHERE c8 = 'foo'; -- can't be sent to remote
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-- parameterized remote path
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EXPLAIN (VERBOSE, COSTS false)
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SELECT * FROM ft2 a, ft2 b WHERE a.c1 = 47 AND b.c1 = a.c2;
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SELECT * FROM ft2 a, ft2 b WHERE a.c1 = 47 AND b.c1 = a.c2;
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-- check both safe and unsafe join conditions
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EXPLAIN (VERBOSE, COSTS false)
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SELECT * FROM ft2 a, ft2 b
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WHERE a.c2 = 6 AND b.c1 = a.c1 AND a.c8 = 'foo' AND b.c7 = upper(a.c7);
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SELECT * FROM ft2 a, ft2 b
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WHERE a.c2 = 6 AND b.c1 = a.c1 AND a.c8 = 'foo' AND b.c7 = upper(a.c7);
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-- bug before 9.3.5 due to sloppy handling of remote-estimate parameters
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SELECT * FROM ft1 WHERE c1 = ANY (ARRAY(SELECT c1 FROM ft2 WHERE c1 < 5));
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SELECT * FROM ft2 WHERE c1 = ANY (ARRAY(SELECT c1 FROM ft1 WHERE c1 < 5));
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-- ===================================================================
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-- parameterized queries
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-- ===================================================================
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-- simple join
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PREPARE st1(int, int) AS SELECT t1.c3, t2.c3 FROM ft1 t1, ft2 t2 WHERE t1.c1 = $1 AND t2.c1 = $2;
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st1(1, 2);
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EXECUTE st1(1, 1);
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EXECUTE st1(101, 101);
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-- subquery using stable function (can't be sent to remote)
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PREPARE st2(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 < $2 AND t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 > $1 AND date(c4) = '1970-01-17'::date) ORDER BY c1;
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st2(10, 20);
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EXECUTE st2(10, 20);
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EXECUTE st2(101, 121);
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-- subquery using immutable function (can be sent to remote)
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PREPARE st3(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 < $2 AND t1.c3 IN (SELECT c3 FROM ft2 t2 WHERE c1 > $1 AND date(c5) = '1970-01-17'::date) ORDER BY c1;
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st3(10, 20);
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EXECUTE st3(10, 20);
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EXECUTE st3(20, 30);
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-- custom plan should be chosen initially
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PREPARE st4(int) AS SELECT * FROM ft1 t1 WHERE t1.c1 = $1;
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
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-- once we try it enough times, should switch to generic plan
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st4(1);
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-- value of $1 should not be sent to remote
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PREPARE st5(user_enum,int) AS SELECT * FROM ft1 t1 WHERE c8 = $1 and c1 = $2;
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
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EXPLAIN (VERBOSE, COSTS false) EXECUTE st5('foo', 1);
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EXECUTE st5('foo', 1);
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-- cleanup
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DEALLOCATE st1;
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DEALLOCATE st2;
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DEALLOCATE st3;
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DEALLOCATE st4;
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DEALLOCATE st5;
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-- System columns, except ctid, should not be sent to remote
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EXPLAIN (VERBOSE, COSTS false)
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SELECT * FROM ft1 t1 WHERE t1.tableoid = 'pg_class'::regclass LIMIT 1;
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SELECT * FROM ft1 t1 WHERE t1.tableoid = 'ft1'::regclass LIMIT 1;
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EXPLAIN (VERBOSE, COSTS false)
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SELECT tableoid::regclass, * FROM ft1 t1 LIMIT 1;
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SELECT tableoid::regclass, * FROM ft1 t1 LIMIT 1;
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EXPLAIN (VERBOSE, COSTS false)
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SELECT * FROM ft1 t1 WHERE t1.ctid = '(0,2)';
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SELECT * FROM ft1 t1 WHERE t1.ctid = '(0,2)';
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EXPLAIN (VERBOSE, COSTS false)
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SELECT ctid, * FROM ft1 t1 LIMIT 1;
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SELECT ctid, * FROM ft1 t1 LIMIT 1;
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-- ===================================================================
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-- used in pl/pgsql function
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-- ===================================================================
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CREATE OR REPLACE FUNCTION f_test(p_c1 int) RETURNS int AS $$
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DECLARE
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v_c1 int;
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BEGIN
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SELECT c1 INTO v_c1 FROM ft1 WHERE c1 = p_c1 LIMIT 1;
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PERFORM c1 FROM ft1 WHERE c1 = p_c1 AND p_c1 = v_c1 LIMIT 1;
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RETURN v_c1;
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END;
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$$ LANGUAGE plpgsql;
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SELECT f_test(100);
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DROP FUNCTION f_test(int);
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-- ===================================================================
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-- conversion error
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-- ===================================================================
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ALTER FOREIGN TABLE ft1 ALTER COLUMN c8 TYPE int;
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SELECT * FROM ft1 WHERE c1 = 1; -- ERROR
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ALTER FOREIGN TABLE ft1 ALTER COLUMN c8 TYPE user_enum;
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-- ===================================================================
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-- subtransaction
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-- + local/remote error doesn't break cursor
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-- ===================================================================
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BEGIN;
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DECLARE c CURSOR FOR SELECT * FROM ft1 ORDER BY c1;
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FETCH c;
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SAVEPOINT s;
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ERROR OUT; -- ERROR
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ROLLBACK TO s;
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FETCH c;
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SAVEPOINT s;
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SELECT * FROM ft1 WHERE 1 / (c1 - 1) > 0; -- ERROR
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ROLLBACK TO s;
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FETCH c;
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SELECT * FROM ft1 ORDER BY c1 LIMIT 1;
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COMMIT;
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-- ===================================================================
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-- test handling of collations
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-- ===================================================================
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create table loct3 (f1 text collate "C", f2 text);
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create foreign table ft3 (f1 text collate "C", f2 text)
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server loopback options (table_name 'loct3');
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-- can be sent to remote
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explain (verbose, costs off) select * from ft3 where f1 = 'foo';
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explain (verbose, costs off) select * from ft3 where f1 COLLATE "C" = 'foo';
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explain (verbose, costs off) select * from ft3 where f2 = 'foo';
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-- can't be sent to remote
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explain (verbose, costs off) select * from ft3 where f1 COLLATE "POSIX" = 'foo';
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explain (verbose, costs off) select * from ft3 where f1 = 'foo' COLLATE "C";
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explain (verbose, costs off) select * from ft3 where f2 COLLATE "C" = 'foo';
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explain (verbose, costs off) select * from ft3 where f2 = 'foo' COLLATE "C";
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-- ===================================================================
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-- test writable foreign table stuff
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-- ===================================================================
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EXPLAIN (verbose, costs off)
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INSERT INTO ft2 (c1,c2,c3) SELECT c1+1000,c2+100, c3 || c3 FROM ft2 LIMIT 20;
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INSERT INTO ft2 (c1,c2,c3) SELECT c1+1000,c2+100, c3 || c3 FROM ft2 LIMIT 20;
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INSERT INTO ft2 (c1,c2,c3)
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VALUES (1101,201,'aaa'), (1102,202,'bbb'), (1103,203,'ccc') RETURNING *;
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INSERT INTO ft2 (c1,c2,c3) VALUES (1104,204,'ddd'), (1105,205,'eee');
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UPDATE ft2 SET c2 = c2 + 300, c3 = c3 || '_update3' WHERE c1 % 10 = 3;
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UPDATE ft2 SET c2 = c2 + 400, c3 = c3 || '_update7' WHERE c1 % 10 = 7 RETURNING *;
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EXPLAIN (verbose, costs off)
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UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9', c7 = DEFAULT
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FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9;
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UPDATE ft2 SET c2 = ft2.c2 + 500, c3 = ft2.c3 || '_update9', c7 = DEFAULT
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FROM ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 9;
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EXPLAIN (verbose, costs off)
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DELETE FROM ft2 WHERE c1 % 10 = 5 RETURNING c1, c4;
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DELETE FROM ft2 WHERE c1 % 10 = 5 RETURNING c1, c4;
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EXPLAIN (verbose, costs off)
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DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2;
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DELETE FROM ft2 USING ft1 WHERE ft1.c1 = ft2.c2 AND ft1.c1 % 10 = 2;
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SELECT c1,c2,c3,c4 FROM ft2 ORDER BY c1;
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-- Test that trigger on remote table works as expected
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CREATE OR REPLACE FUNCTION "S 1".F_BRTRIG() RETURNS trigger AS $$
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BEGIN
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NEW.c3 = NEW.c3 || '_trig_update';
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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CREATE TRIGGER t1_br_insert BEFORE INSERT OR UPDATE
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ON "S 1"."T 1" FOR EACH ROW EXECUTE PROCEDURE "S 1".F_BRTRIG();
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INSERT INTO ft2 (c1,c2,c3) VALUES (1208, 818, 'fff') RETURNING *;
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INSERT INTO ft2 (c1,c2,c3,c6) VALUES (1218, 818, 'ggg', '(--;') RETURNING *;
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UPDATE ft2 SET c2 = c2 + 600 WHERE c1 % 10 = 8 AND c1 < 1200 RETURNING *;
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-- Test errors thrown on remote side during update
|
|
ALTER TABLE "S 1"."T 1" ADD CONSTRAINT c2positive CHECK (c2 >= 0);
|
|
|
|
INSERT INTO ft1(c1, c2) VALUES(11, 12); -- duplicate key
|
|
INSERT INTO ft1(c1, c2) VALUES(11, 12) ON CONFLICT DO NOTHING; -- works
|
|
INSERT INTO ft1(c1, c2) VALUES(11, 12) ON CONFLICT (c1, c2) DO NOTHING; -- unsupported
|
|
INSERT INTO ft1(c1, c2) VALUES(11, 12) ON CONFLICT (c1, c2) DO UPDATE SET c3 = 'ffg'; -- unsupported
|
|
INSERT INTO ft1(c1, c2) VALUES(1111, -2); -- c2positive
|
|
UPDATE ft1 SET c2 = -c2 WHERE c1 = 1; -- c2positive
|
|
|
|
-- Test savepoint/rollback behavior
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
|
|
begin;
|
|
update ft2 set c2 = 42 where c2 = 0;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
savepoint s1;
|
|
update ft2 set c2 = 44 where c2 = 4;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
release savepoint s1;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
savepoint s2;
|
|
update ft2 set c2 = 46 where c2 = 6;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
rollback to savepoint s2;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
release savepoint s2;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
savepoint s3;
|
|
update ft2 set c2 = -2 where c2 = 42 and c1 = 10; -- fail on remote side
|
|
rollback to savepoint s3;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
release savepoint s3;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
-- none of the above is committed yet remotely
|
|
select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
|
|
commit;
|
|
select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
|
|
select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
|
|
|
|
-- ===================================================================
|
|
-- test check constraints
|
|
-- ===================================================================
|
|
|
|
-- Consistent check constraints provide consistent results
|
|
ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c2positive CHECK (c2 >= 0);
|
|
EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 < 0;
|
|
SELECT count(*) FROM ft1 WHERE c2 < 0;
|
|
SET constraint_exclusion = 'on';
|
|
EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 < 0;
|
|
SELECT count(*) FROM ft1 WHERE c2 < 0;
|
|
RESET constraint_exclusion;
|
|
-- check constraint is enforced on the remote side, not locally
|
|
INSERT INTO ft1(c1, c2) VALUES(1111, -2); -- c2positive
|
|
UPDATE ft1 SET c2 = -c2 WHERE c1 = 1; -- c2positive
|
|
ALTER FOREIGN TABLE ft1 DROP CONSTRAINT ft1_c2positive;
|
|
|
|
-- But inconsistent check constraints provide inconsistent results
|
|
ALTER FOREIGN TABLE ft1 ADD CONSTRAINT ft1_c2negative CHECK (c2 < 0);
|
|
EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 >= 0;
|
|
SELECT count(*) FROM ft1 WHERE c2 >= 0;
|
|
SET constraint_exclusion = 'on';
|
|
EXPLAIN (VERBOSE, COSTS false) SELECT count(*) FROM ft1 WHERE c2 >= 0;
|
|
SELECT count(*) FROM ft1 WHERE c2 >= 0;
|
|
RESET constraint_exclusion;
|
|
-- local check constraint is not actually enforced
|
|
INSERT INTO ft1(c1, c2) VALUES(1111, 2);
|
|
UPDATE ft1 SET c2 = c2 + 1 WHERE c1 = 1;
|
|
ALTER FOREIGN TABLE ft1 DROP CONSTRAINT ft1_c2negative;
|
|
|
|
-- ===================================================================
|
|
-- test serial columns (ie, sequence-based defaults)
|
|
-- ===================================================================
|
|
create table loc1 (f1 serial, f2 text);
|
|
create foreign table rem1 (f1 serial, f2 text)
|
|
server loopback options(table_name 'loc1');
|
|
select pg_catalog.setval('rem1_f1_seq', 10, false);
|
|
insert into loc1(f2) values('hi');
|
|
insert into rem1(f2) values('hi remote');
|
|
insert into loc1(f2) values('bye');
|
|
insert into rem1(f2) values('bye remote');
|
|
select * from loc1;
|
|
select * from rem1;
|
|
|
|
-- ===================================================================
|
|
-- test local triggers
|
|
-- ===================================================================
|
|
|
|
-- Trigger functions "borrowed" from triggers regress test.
|
|
CREATE FUNCTION trigger_func() RETURNS trigger LANGUAGE plpgsql AS $$
|
|
BEGIN
|
|
RAISE NOTICE 'trigger_func(%) called: action = %, when = %, level = %',
|
|
TG_ARGV[0], TG_OP, TG_WHEN, TG_LEVEL;
|
|
RETURN NULL;
|
|
END;$$;
|
|
|
|
CREATE TRIGGER trig_stmt_before BEFORE DELETE OR INSERT OR UPDATE ON rem1
|
|
FOR EACH STATEMENT EXECUTE PROCEDURE trigger_func();
|
|
CREATE TRIGGER trig_stmt_after AFTER DELETE OR INSERT OR UPDATE ON rem1
|
|
FOR EACH STATEMENT EXECUTE PROCEDURE trigger_func();
|
|
|
|
CREATE OR REPLACE FUNCTION trigger_data() RETURNS trigger
|
|
LANGUAGE plpgsql AS $$
|
|
|
|
declare
|
|
oldnew text[];
|
|
relid text;
|
|
argstr text;
|
|
begin
|
|
|
|
relid := TG_relid::regclass;
|
|
argstr := '';
|
|
for i in 0 .. TG_nargs - 1 loop
|
|
if i > 0 then
|
|
argstr := argstr || ', ';
|
|
end if;
|
|
argstr := argstr || TG_argv[i];
|
|
end loop;
|
|
|
|
RAISE NOTICE '%(%) % % % ON %',
|
|
tg_name, argstr, TG_when, TG_level, TG_OP, relid;
|
|
oldnew := '{}'::text[];
|
|
if TG_OP != 'INSERT' then
|
|
oldnew := array_append(oldnew, format('OLD: %s', OLD));
|
|
end if;
|
|
|
|
if TG_OP != 'DELETE' then
|
|
oldnew := array_append(oldnew, format('NEW: %s', NEW));
|
|
end if;
|
|
|
|
RAISE NOTICE '%', array_to_string(oldnew, ',');
|
|
|
|
if TG_OP = 'DELETE' then
|
|
return OLD;
|
|
else
|
|
return NEW;
|
|
end if;
|
|
end;
|
|
$$;
|
|
|
|
-- Test basic functionality
|
|
CREATE TRIGGER trig_row_before
|
|
BEFORE INSERT OR UPDATE OR DELETE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
CREATE TRIGGER trig_row_after
|
|
AFTER INSERT OR UPDATE OR DELETE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
delete from rem1;
|
|
insert into rem1 values(1,'insert');
|
|
update rem1 set f2 = 'update' where f1 = 1;
|
|
update rem1 set f2 = f2 || f2;
|
|
|
|
|
|
-- cleanup
|
|
DROP TRIGGER trig_row_before ON rem1;
|
|
DROP TRIGGER trig_row_after ON rem1;
|
|
DROP TRIGGER trig_stmt_before ON rem1;
|
|
DROP TRIGGER trig_stmt_after ON rem1;
|
|
|
|
DELETE from rem1;
|
|
|
|
|
|
-- Test WHEN conditions
|
|
|
|
CREATE TRIGGER trig_row_before_insupd
|
|
BEFORE INSERT OR UPDATE ON rem1
|
|
FOR EACH ROW
|
|
WHEN (NEW.f2 like '%update%')
|
|
EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
CREATE TRIGGER trig_row_after_insupd
|
|
AFTER INSERT OR UPDATE ON rem1
|
|
FOR EACH ROW
|
|
WHEN (NEW.f2 like '%update%')
|
|
EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
-- Insert or update not matching: nothing happens
|
|
INSERT INTO rem1 values(1, 'insert');
|
|
UPDATE rem1 set f2 = 'test';
|
|
|
|
-- Insert or update matching: triggers are fired
|
|
INSERT INTO rem1 values(2, 'update');
|
|
UPDATE rem1 set f2 = 'update update' where f1 = '2';
|
|
|
|
CREATE TRIGGER trig_row_before_delete
|
|
BEFORE DELETE ON rem1
|
|
FOR EACH ROW
|
|
WHEN (OLD.f2 like '%update%')
|
|
EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
CREATE TRIGGER trig_row_after_delete
|
|
AFTER DELETE ON rem1
|
|
FOR EACH ROW
|
|
WHEN (OLD.f2 like '%update%')
|
|
EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
-- Trigger is fired for f1=2, not for f1=1
|
|
DELETE FROM rem1;
|
|
|
|
-- cleanup
|
|
DROP TRIGGER trig_row_before_insupd ON rem1;
|
|
DROP TRIGGER trig_row_after_insupd ON rem1;
|
|
DROP TRIGGER trig_row_before_delete ON rem1;
|
|
DROP TRIGGER trig_row_after_delete ON rem1;
|
|
|
|
|
|
-- Test various RETURN statements in BEFORE triggers.
|
|
|
|
CREATE FUNCTION trig_row_before_insupdate() RETURNS TRIGGER AS $$
|
|
BEGIN
|
|
NEW.f2 := NEW.f2 || ' triggered !';
|
|
RETURN NEW;
|
|
END
|
|
$$ language plpgsql;
|
|
|
|
CREATE TRIGGER trig_row_before_insupd
|
|
BEFORE INSERT OR UPDATE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trig_row_before_insupdate();
|
|
|
|
-- The new values should have 'triggered' appended
|
|
INSERT INTO rem1 values(1, 'insert');
|
|
SELECT * from loc1;
|
|
INSERT INTO rem1 values(2, 'insert') RETURNING f2;
|
|
SELECT * from loc1;
|
|
UPDATE rem1 set f2 = '';
|
|
SELECT * from loc1;
|
|
UPDATE rem1 set f2 = 'skidoo' RETURNING f2;
|
|
SELECT * from loc1;
|
|
|
|
DELETE FROM rem1;
|
|
|
|
-- Add a second trigger, to check that the changes are propagated correctly
|
|
-- from trigger to trigger
|
|
CREATE TRIGGER trig_row_before_insupd2
|
|
BEFORE INSERT OR UPDATE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trig_row_before_insupdate();
|
|
|
|
INSERT INTO rem1 values(1, 'insert');
|
|
SELECT * from loc1;
|
|
INSERT INTO rem1 values(2, 'insert') RETURNING f2;
|
|
SELECT * from loc1;
|
|
UPDATE rem1 set f2 = '';
|
|
SELECT * from loc1;
|
|
UPDATE rem1 set f2 = 'skidoo' RETURNING f2;
|
|
SELECT * from loc1;
|
|
|
|
DROP TRIGGER trig_row_before_insupd ON rem1;
|
|
DROP TRIGGER trig_row_before_insupd2 ON rem1;
|
|
|
|
DELETE from rem1;
|
|
|
|
INSERT INTO rem1 VALUES (1, 'test');
|
|
|
|
-- Test with a trigger returning NULL
|
|
CREATE FUNCTION trig_null() RETURNS TRIGGER AS $$
|
|
BEGIN
|
|
RETURN NULL;
|
|
END
|
|
$$ language plpgsql;
|
|
|
|
CREATE TRIGGER trig_null
|
|
BEFORE INSERT OR UPDATE OR DELETE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trig_null();
|
|
|
|
-- Nothing should have changed.
|
|
INSERT INTO rem1 VALUES (2, 'test2');
|
|
|
|
SELECT * from loc1;
|
|
|
|
UPDATE rem1 SET f2 = 'test2';
|
|
|
|
SELECT * from loc1;
|
|
|
|
DELETE from rem1;
|
|
|
|
SELECT * from loc1;
|
|
|
|
DROP TRIGGER trig_null ON rem1;
|
|
DELETE from rem1;
|
|
|
|
-- Test a combination of local and remote triggers
|
|
CREATE TRIGGER trig_row_before
|
|
BEFORE INSERT OR UPDATE OR DELETE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
CREATE TRIGGER trig_row_after
|
|
AFTER INSERT OR UPDATE OR DELETE ON rem1
|
|
FOR EACH ROW EXECUTE PROCEDURE trigger_data(23,'skidoo');
|
|
|
|
CREATE TRIGGER trig_local_before BEFORE INSERT OR UPDATE ON loc1
|
|
FOR EACH ROW EXECUTE PROCEDURE trig_row_before_insupdate();
|
|
|
|
INSERT INTO rem1(f2) VALUES ('test');
|
|
UPDATE rem1 SET f2 = 'testo';
|
|
|
|
-- Test returning a system attribute
|
|
INSERT INTO rem1(f2) VALUES ('test') RETURNING ctid;
|
|
|
|
-- ===================================================================
|
|
-- test inheritance features
|
|
-- ===================================================================
|
|
|
|
CREATE TABLE a (aa TEXT);
|
|
CREATE TABLE loct (aa TEXT, bb TEXT);
|
|
CREATE FOREIGN TABLE b (bb TEXT) INHERITS (a)
|
|
SERVER loopback OPTIONS (table_name 'loct');
|
|
|
|
INSERT INTO a(aa) VALUES('aaa');
|
|
INSERT INTO a(aa) VALUES('aaaa');
|
|
INSERT INTO a(aa) VALUES('aaaaa');
|
|
|
|
INSERT INTO b(aa) VALUES('bbb');
|
|
INSERT INTO b(aa) VALUES('bbbb');
|
|
INSERT INTO b(aa) VALUES('bbbbb');
|
|
|
|
SELECT tableoid::regclass, * FROM a;
|
|
SELECT tableoid::regclass, * FROM b;
|
|
SELECT tableoid::regclass, * FROM ONLY a;
|
|
|
|
UPDATE a SET aa = 'zzzzzz' WHERE aa LIKE 'aaaa%';
|
|
|
|
SELECT tableoid::regclass, * FROM a;
|
|
SELECT tableoid::regclass, * FROM b;
|
|
SELECT tableoid::regclass, * FROM ONLY a;
|
|
|
|
UPDATE b SET aa = 'new';
|
|
|
|
SELECT tableoid::regclass, * FROM a;
|
|
SELECT tableoid::regclass, * FROM b;
|
|
SELECT tableoid::regclass, * FROM ONLY a;
|
|
|
|
UPDATE a SET aa = 'newtoo';
|
|
|
|
SELECT tableoid::regclass, * FROM a;
|
|
SELECT tableoid::regclass, * FROM b;
|
|
SELECT tableoid::regclass, * FROM ONLY a;
|
|
|
|
DELETE FROM a;
|
|
|
|
SELECT tableoid::regclass, * FROM a;
|
|
SELECT tableoid::regclass, * FROM b;
|
|
SELECT tableoid::regclass, * FROM ONLY a;
|
|
|
|
DROP TABLE a CASCADE;
|
|
DROP TABLE loct;
|
|
|
|
-- Check SELECT FOR UPDATE/SHARE with an inherited source table
|
|
create table loct1 (f1 int, f2 int, f3 int);
|
|
create table loct2 (f1 int, f2 int, f3 int);
|
|
|
|
create table foo (f1 int, f2 int);
|
|
create foreign table foo2 (f3 int) inherits (foo)
|
|
server loopback options (table_name 'loct1');
|
|
create table bar (f1 int, f2 int);
|
|
create foreign table bar2 (f3 int) inherits (bar)
|
|
server loopback options (table_name 'loct2');
|
|
|
|
insert into foo values(1,1);
|
|
insert into foo values(3,3);
|
|
insert into foo2 values(2,2,2);
|
|
insert into foo2 values(4,4,4);
|
|
insert into bar values(1,11);
|
|
insert into bar values(2,22);
|
|
insert into bar values(6,66);
|
|
insert into bar2 values(3,33,33);
|
|
insert into bar2 values(4,44,44);
|
|
insert into bar2 values(7,77,77);
|
|
|
|
explain (verbose, costs off)
|
|
select * from bar where f1 in (select f1 from foo) for update;
|
|
select * from bar where f1 in (select f1 from foo) for update;
|
|
|
|
explain (verbose, costs off)
|
|
select * from bar where f1 in (select f1 from foo) for share;
|
|
select * from bar where f1 in (select f1 from foo) for share;
|
|
|
|
-- Check UPDATE with inherited target and an inherited source table
|
|
explain (verbose, costs off)
|
|
update bar set f2 = f2 + 100 where f1 in (select f1 from foo);
|
|
update bar set f2 = f2 + 100 where f1 in (select f1 from foo);
|
|
|
|
select tableoid::regclass, * from bar order by 1,2;
|
|
|
|
-- Check UPDATE with inherited target and an appendrel subquery
|
|
explain (verbose, costs off)
|
|
update bar set f2 = f2 + 100
|
|
from
|
|
( select f1 from foo union all select f1+3 from foo ) ss
|
|
where bar.f1 = ss.f1;
|
|
update bar set f2 = f2 + 100
|
|
from
|
|
( select f1 from foo union all select f1+3 from foo ) ss
|
|
where bar.f1 = ss.f1;
|
|
|
|
select tableoid::regclass, * from bar order by 1,2;
|
|
|
|
-- Test that WHERE CURRENT OF is not supported
|
|
begin;
|
|
declare c cursor for select * from bar where f1 = 7;
|
|
fetch from c;
|
|
update bar set f2 = null where current of c;
|
|
rollback;
|
|
|
|
drop table foo cascade;
|
|
drop table bar cascade;
|
|
drop table loct1;
|
|
drop table loct2;
|
|
|
|
-- ===================================================================
|
|
-- test IMPORT FOREIGN SCHEMA
|
|
-- ===================================================================
|
|
|
|
CREATE SCHEMA import_source;
|
|
CREATE TABLE import_source.t1 (c1 int, c2 varchar NOT NULL);
|
|
CREATE TABLE import_source.t2 (c1 int default 42, c2 varchar NULL, c3 text collate "POSIX");
|
|
CREATE TYPE typ1 AS (m1 int, m2 varchar);
|
|
CREATE TABLE import_source.t3 (c1 timestamptz default now(), c2 typ1);
|
|
CREATE TABLE import_source."x 4" (c1 float8, "C 2" text, c3 varchar(42));
|
|
CREATE TABLE import_source."x 5" (c1 float8);
|
|
ALTER TABLE import_source."x 5" DROP COLUMN c1;
|
|
|
|
CREATE SCHEMA import_dest1;
|
|
IMPORT FOREIGN SCHEMA import_source FROM SERVER loopback INTO import_dest1;
|
|
\det+ import_dest1
|
|
\d import_dest1.*
|
|
|
|
-- Options
|
|
CREATE SCHEMA import_dest2;
|
|
IMPORT FOREIGN SCHEMA import_source FROM SERVER loopback INTO import_dest2
|
|
OPTIONS (import_default 'true');
|
|
\det+ import_dest2
|
|
\d import_dest2.*
|
|
CREATE SCHEMA import_dest3;
|
|
IMPORT FOREIGN SCHEMA import_source FROM SERVER loopback INTO import_dest3
|
|
OPTIONS (import_collate 'false', import_not_null 'false');
|
|
\det+ import_dest3
|
|
\d import_dest3.*
|
|
|
|
-- Check LIMIT TO and EXCEPT
|
|
CREATE SCHEMA import_dest4;
|
|
IMPORT FOREIGN SCHEMA import_source LIMIT TO (t1, nonesuch)
|
|
FROM SERVER loopback INTO import_dest4;
|
|
\det+ import_dest4
|
|
IMPORT FOREIGN SCHEMA import_source EXCEPT (t1, "x 4", nonesuch)
|
|
FROM SERVER loopback INTO import_dest4;
|
|
\det+ import_dest4
|
|
|
|
-- Assorted error cases
|
|
IMPORT FOREIGN SCHEMA import_source FROM SERVER loopback INTO import_dest4;
|
|
IMPORT FOREIGN SCHEMA nonesuch FROM SERVER loopback INTO import_dest4;
|
|
IMPORT FOREIGN SCHEMA nonesuch FROM SERVER loopback INTO notthere;
|
|
IMPORT FOREIGN SCHEMA nonesuch FROM SERVER nowhere INTO notthere;
|
|
|
|
-- Check case of a type present only on the remote server.
|
|
-- We can fake this by dropping the type locally in our transaction.
|
|
CREATE TYPE "Colors" AS ENUM ('red', 'green', 'blue');
|
|
CREATE TABLE import_source.t5 (c1 int, c2 text collate "C", "Col" "Colors");
|
|
|
|
CREATE SCHEMA import_dest5;
|
|
BEGIN;
|
|
DROP TYPE "Colors" CASCADE;
|
|
IMPORT FOREIGN SCHEMA import_source LIMIT TO (t5)
|
|
FROM SERVER loopback INTO import_dest5; -- ERROR
|
|
ROLLBACK;
|