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https://github.com/postgres/postgres.git
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5b68d81697
We were emitting "(SELECT null::typename)", which is usually interpreted as a scalar subselect, but not so much in the context "x = ANY(...)". This led to remote-side parsing failures when remote_estimate is enabled. A quick and ugly fix is to stick in an extra cast step, "((SELECT null::typename)::typename)". The cast will be thrown away as redundant by parse analysis, but not before it's done its job of making sure the grammar sees the ANY argument as an a_expr rather than a select_with_parens. Per an example from Hannu Krosing.
612 lines
21 KiB
PL/PgSQL
612 lines
21 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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CREATE SERVER loopback FOREIGN DATA WRAPPER postgres_fdw
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OPTIONS (dbname 'contrib_regression');
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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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-- 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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-- ===================================================================
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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
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ALTER TABLE "S 1"."T 1" ADD CONSTRAINT c2positive CHECK (c2 >= 0);
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INSERT INTO ft1(c1, c2) VALUES(11, 12); -- duplicate key
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INSERT INTO ft1(c1, c2) VALUES(1111, -2); -- c2positive
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UPDATE ft1 SET c2 = -c2 WHERE c1 = 1; -- c2positive
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-- Test savepoint/rollback behavior
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
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begin;
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update ft2 set c2 = 42 where c2 = 0;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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savepoint s1;
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update ft2 set c2 = 44 where c2 = 4;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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release savepoint s1;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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savepoint s2;
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update ft2 set c2 = 46 where c2 = 6;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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rollback to savepoint s2;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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release savepoint s2;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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savepoint s3;
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update ft2 set c2 = -2 where c2 = 42 and c1 = 10; -- fail on remote side
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rollback to savepoint s3;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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release savepoint s3;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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-- none of the above is committed yet remotely
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select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
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commit;
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select c2, count(*) from ft2 where c2 < 500 group by 1 order by 1;
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select c2, count(*) from "S 1"."T 1" where c2 < 500 group by 1 order by 1;
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-- ===================================================================
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-- test serial columns (ie, sequence-based defaults)
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|
-- ===================================================================
|
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create table loc1 (f1 serial, f2 text);
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create foreign table rem1 (f1 serial, f2 text)
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server loopback options(table_name 'loc1');
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select pg_catalog.setval('rem1_f1_seq', 10, false);
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insert into loc1(f2) values('hi');
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insert into rem1(f2) values('hi remote');
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insert into loc1(f2) values('bye');
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insert into rem1(f2) values('bye remote');
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select * from loc1;
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select * from rem1;
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|
|
|
-- ===================================================================
|
|
-- test local triggers
|
|
-- ===================================================================
|
|
|
|
-- Trigger functions "borrowed" from triggers regress test.
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CREATE FUNCTION trigger_func() RETURNS trigger LANGUAGE plpgsql AS $$
|
|
BEGIN
|
|
RAISE NOTICE 'trigger_func(%) called: action = %, when = %, level = %',
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|
TG_ARGV[0], TG_OP, TG_WHEN, TG_LEVEL;
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|
RETURN NULL;
|
|
END;$$;
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|
|
|
CREATE TRIGGER trig_stmt_before BEFORE DELETE OR INSERT OR UPDATE ON rem1
|
|
FOR EACH STATEMENT EXECUTE PROCEDURE trigger_func();
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CREATE TRIGGER trig_stmt_after AFTER DELETE OR INSERT OR UPDATE ON rem1
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FOR EACH STATEMENT EXECUTE PROCEDURE trigger_func();
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|
|
|
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;
|