512 lines
16 KiB
MySQL
512 lines
16 KiB
MySQL
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--
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-- UPDATABLE VIEWS
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--
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-- check that non-updatable views are rejected with useful error messages
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CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
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INSERT INTO base_tbl SELECT i, 'Row ' || i FROM generate_series(-2, 2) g(i);
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CREATE VIEW ro_view1 AS SELECT DISTINCT a, b FROM base_tbl; -- DISTINCT not supported
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CREATE VIEW ro_view2 AS SELECT a, b FROM base_tbl GROUP BY a, b; -- GROUP BY not supported
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CREATE VIEW ro_view3 AS SELECT 1 FROM base_tbl HAVING max(a) > 0; -- HAVING not supported
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CREATE VIEW ro_view4 AS SELECT count(*) FROM base_tbl; -- Aggregate functions not supported
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CREATE VIEW ro_view5 AS SELECT a, rank() OVER() FROM base_tbl; -- Window functions not supported
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CREATE VIEW ro_view6 AS SELECT a, b FROM base_tbl UNION SELECT -a, b FROM base_tbl; -- Set ops not supported
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CREATE VIEW ro_view7 AS WITH t AS (SELECT a, b FROM base_tbl) SELECT * FROM t; -- WITH not supported
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CREATE VIEW ro_view8 AS SELECT a, b FROM base_tbl ORDER BY a OFFSET 1; -- OFFSET not supported
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CREATE VIEW ro_view9 AS SELECT a, b FROM base_tbl ORDER BY a LIMIT 1; -- LIMIT not supported
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CREATE VIEW ro_view10 AS SELECT 1 AS a; -- No base relations
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CREATE VIEW ro_view11 AS SELECT b1.a, b2.b FROM base_tbl b1, base_tbl b2; -- Multiple base relations
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CREATE VIEW ro_view12 AS SELECT * FROM generate_series(1, 10) AS g(a); -- SRF in rangetable
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CREATE VIEW ro_view13 AS SELECT a, b FROM (SELECT * FROM base_tbl) AS t; -- Subselect in rangetable
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CREATE VIEW ro_view14 AS SELECT ctid FROM base_tbl; -- System columns not supported
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CREATE VIEW ro_view15 AS SELECT a, upper(b) FROM base_tbl; -- Expression/function in targetlist
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CREATE VIEW ro_view16 AS SELECT a, b, a AS aa FROM base_tbl; -- Repeated column
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CREATE VIEW ro_view17 AS SELECT * FROM ro_view1; -- Base relation not updatable
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CREATE VIEW ro_view18 WITH (security_barrier = true)
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AS SELECT * FROM base_tbl; -- Security barrier views not updatable
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CREATE VIEW ro_view19 AS SELECT * FROM (VALUES(1)) AS tmp(a); -- VALUES in rangetable
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CREATE SEQUENCE seq;
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CREATE VIEW ro_view20 AS SELECT * FROM seq; -- View based on a sequence
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'ro_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'ro_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'ro_view%'
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ORDER BY table_name, ordinal_position;
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DELETE FROM ro_view1;
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DELETE FROM ro_view2;
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DELETE FROM ro_view3;
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DELETE FROM ro_view4;
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DELETE FROM ro_view5;
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DELETE FROM ro_view6;
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UPDATE ro_view7 SET a=a+1;
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UPDATE ro_view8 SET a=a+1;
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UPDATE ro_view9 SET a=a+1;
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UPDATE ro_view10 SET a=a+1;
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UPDATE ro_view11 SET a=a+1;
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UPDATE ro_view12 SET a=a+1;
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INSERT INTO ro_view13 VALUES (3, 'Row 3');
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INSERT INTO ro_view14 VALUES (null);
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INSERT INTO ro_view15 VALUES (3, 'ROW 3');
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INSERT INTO ro_view16 VALUES (3, 'Row 3', 3);
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INSERT INTO ro_view17 VALUES (3, 'ROW 3');
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INSERT INTO ro_view18 VALUES (3, 'ROW 3');
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DELETE FROM ro_view19;
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UPDATE ro_view20 SET max_value=1000;
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DROP TABLE base_tbl CASCADE;
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DROP VIEW ro_view10, ro_view12, ro_view19;
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DROP SEQUENCE seq CASCADE;
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-- simple updatable view
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CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
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INSERT INTO base_tbl SELECT i, 'Row ' || i FROM generate_series(-2, 2) g(i);
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CREATE VIEW rw_view1 AS SELECT * FROM base_tbl WHERE a>0;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name = 'rw_view1';
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name = 'rw_view1';
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name = 'rw_view1'
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ORDER BY ordinal_position;
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INSERT INTO rw_view1 VALUES (3, 'Row 3');
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INSERT INTO rw_view1 (a) VALUES (4);
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UPDATE rw_view1 SET a=5 WHERE a=4;
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DELETE FROM rw_view1 WHERE b='Row 2';
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SELECT * FROM base_tbl;
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EXPLAIN (costs off) UPDATE rw_view1 SET a=6 WHERE a=5;
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EXPLAIN (costs off) DELETE FROM rw_view1 WHERE a=5;
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DROP TABLE base_tbl CASCADE;
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-- view on top of view
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CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
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INSERT INTO base_tbl SELECT i, 'Row ' || i FROM generate_series(-2, 2) g(i);
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CREATE VIEW rw_view1 AS SELECT b AS bb, a AS aa FROM base_tbl WHERE a>0;
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CREATE VIEW rw_view2 AS SELECT aa AS aaa, bb AS bbb FROM rw_view1 WHERE aa<10;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name = 'rw_view2';
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name = 'rw_view2';
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name = 'rw_view2'
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ORDER BY ordinal_position;
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INSERT INTO rw_view2 VALUES (3, 'Row 3');
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INSERT INTO rw_view2 (aaa) VALUES (4);
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SELECT * FROM rw_view2;
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UPDATE rw_view2 SET bbb='Row 4' WHERE aaa=4;
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DELETE FROM rw_view2 WHERE aaa=2;
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SELECT * FROM rw_view2;
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EXPLAIN (costs off) UPDATE rw_view2 SET aaa=5 WHERE aaa=4;
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EXPLAIN (costs off) DELETE FROM rw_view2 WHERE aaa=4;
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DROP TABLE base_tbl CASCADE;
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-- view on top of view with rules
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CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
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INSERT INTO base_tbl SELECT i, 'Row ' || i FROM generate_series(-2, 2) g(i);
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CREATE VIEW rw_view1 AS SELECT * FROM base_tbl WHERE a>0 OFFSET 0; -- not updatable without rules/triggers
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CREATE VIEW rw_view2 AS SELECT * FROM rw_view1 WHERE a<10;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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CREATE RULE rw_view1_ins_rule AS ON INSERT TO rw_view1
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DO INSTEAD INSERT INTO base_tbl VALUES (NEW.a, NEW.b) RETURNING *;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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CREATE RULE rw_view1_upd_rule AS ON UPDATE TO rw_view1
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DO INSTEAD UPDATE base_tbl SET b=NEW.b WHERE a=OLD.a RETURNING NEW.*;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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CREATE RULE rw_view1_del_rule AS ON DELETE TO rw_view1
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DO INSTEAD DELETE FROM base_tbl WHERE a=OLD.a RETURNING OLD.*;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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INSERT INTO rw_view2 VALUES (3, 'Row 3') RETURNING *;
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UPDATE rw_view2 SET b='Row three' WHERE a=3 RETURNING *;
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SELECT * FROM rw_view2;
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DELETE FROM rw_view2 WHERE a=3 RETURNING *;
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SELECT * FROM rw_view2;
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EXPLAIN (costs off) UPDATE rw_view2 SET a=3 WHERE a=2;
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EXPLAIN (costs off) DELETE FROM rw_view2 WHERE a=2;
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DROP TABLE base_tbl CASCADE;
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-- view on top of view with triggers
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CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
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INSERT INTO base_tbl SELECT i, 'Row ' || i FROM generate_series(-2, 2) g(i);
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CREATE VIEW rw_view1 AS SELECT * FROM base_tbl WHERE a>0 OFFSET 0; -- not updatable without rules/triggers
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CREATE VIEW rw_view2 AS SELECT * FROM rw_view1 WHERE a<10;
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into,
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is_trigger_updatable, is_trigger_deletable,
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is_trigger_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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CREATE FUNCTION rw_view1_trig_fn()
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RETURNS trigger AS
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$$
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BEGIN
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IF TG_OP = 'INSERT' THEN
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INSERT INTO base_tbl VALUES (NEW.a, NEW.b);
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RETURN NEW;
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ELSIF TG_OP = 'UPDATE' THEN
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UPDATE base_tbl SET b=NEW.b WHERE a=OLD.a;
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RETURN NEW;
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ELSIF TG_OP = 'DELETE' THEN
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DELETE FROM base_tbl WHERE a=OLD.a;
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RETURN OLD;
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END IF;
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END;
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$$
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LANGUAGE plpgsql;
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CREATE TRIGGER rw_view1_ins_trig INSTEAD OF INSERT ON rw_view1
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FOR EACH ROW EXECUTE PROCEDURE rw_view1_trig_fn();
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into,
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is_trigger_updatable, is_trigger_deletable,
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is_trigger_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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CREATE TRIGGER rw_view1_upd_trig INSTEAD OF UPDATE ON rw_view1
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FOR EACH ROW EXECUTE PROCEDURE rw_view1_trig_fn();
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into,
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is_trigger_updatable, is_trigger_deletable,
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is_trigger_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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CREATE TRIGGER rw_view1_del_trig INSTEAD OF DELETE ON rw_view1
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FOR EACH ROW EXECUTE PROCEDURE rw_view1_trig_fn();
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SELECT table_name, is_insertable_into
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FROM information_schema.tables
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, is_updatable, is_insertable_into,
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is_trigger_updatable, is_trigger_deletable,
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is_trigger_insertable_into
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FROM information_schema.views
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name;
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SELECT table_name, column_name, is_updatable
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FROM information_schema.columns
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WHERE table_name LIKE 'rw_view%'
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ORDER BY table_name, ordinal_position;
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INSERT INTO rw_view2 VALUES (3, 'Row 3') RETURNING *;
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UPDATE rw_view2 SET b='Row three' WHERE a=3 RETURNING *;
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SELECT * FROM rw_view2;
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DELETE FROM rw_view2 WHERE a=3 RETURNING *;
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SELECT * FROM rw_view2;
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EXPLAIN (costs off) UPDATE rw_view2 SET a=3 WHERE a=2;
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EXPLAIN (costs off) DELETE FROM rw_view2 WHERE a=2;
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DROP TABLE base_tbl CASCADE;
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DROP FUNCTION rw_view1_trig_fn();
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-- update using whole row from view
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CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
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INSERT INTO base_tbl SELECT i, 'Row ' || i FROM generate_series(-2, 2) g(i);
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CREATE VIEW rw_view1 AS SELECT b AS bb, a AS aa FROM base_tbl;
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CREATE FUNCTION rw_view1_aa(x rw_view1)
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RETURNS int AS $$ SELECT x.aa $$ LANGUAGE sql;
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UPDATE rw_view1 v SET bb='Updated row 2' WHERE rw_view1_aa(v)=2
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RETURNING rw_view1_aa(v), v.bb;
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SELECT * FROM base_tbl;
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EXPLAIN (costs off)
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UPDATE rw_view1 v SET bb='Updated row 2' WHERE rw_view1_aa(v)=2
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RETURNING rw_view1_aa(v), v.bb;
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DROP TABLE base_tbl CASCADE;
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-- permissions checks
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CREATE USER view_user1;
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CREATE USER view_user2;
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SET SESSION AUTHORIZATION view_user1;
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CREATE TABLE base_tbl(a int, b text, c float);
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INSERT INTO base_tbl VALUES (1, 'Row 1', 1.0);
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CREATE VIEW rw_view1 AS SELECT b AS bb, c AS cc, a AS aa FROM base_tbl;
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INSERT INTO rw_view1 VALUES ('Row 2', 2.0, 2);
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GRANT SELECT ON base_tbl TO view_user2;
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GRANT SELECT ON rw_view1 TO view_user2;
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GRANT UPDATE (a,c) ON base_tbl TO view_user2;
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GRANT UPDATE (bb,cc) ON rw_view1 TO view_user2;
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RESET SESSION AUTHORIZATION;
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SET SESSION AUTHORIZATION view_user2;
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CREATE VIEW rw_view2 AS SELECT b AS bb, c AS cc, a AS aa FROM base_tbl;
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SELECT * FROM base_tbl; -- ok
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SELECT * FROM rw_view1; -- ok
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SELECT * FROM rw_view2; -- ok
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INSERT INTO base_tbl VALUES (3, 'Row 3', 3.0); -- not allowed
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INSERT INTO rw_view1 VALUES ('Row 3', 3.0, 3); -- not allowed
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INSERT INTO rw_view2 VALUES ('Row 3', 3.0, 3); -- not allowed
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UPDATE base_tbl SET a=a, c=c; -- ok
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UPDATE base_tbl SET b=b; -- not allowed
|
||
|
UPDATE rw_view1 SET bb=bb, cc=cc; -- ok
|
||
|
UPDATE rw_view1 SET aa=aa; -- not allowed
|
||
|
UPDATE rw_view2 SET aa=aa, cc=cc; -- ok
|
||
|
UPDATE rw_view2 SET bb=bb; -- not allowed
|
||
|
|
||
|
DELETE FROM base_tbl; -- not allowed
|
||
|
DELETE FROM rw_view1; -- not allowed
|
||
|
DELETE FROM rw_view2; -- not allowed
|
||
|
RESET SESSION AUTHORIZATION;
|
||
|
|
||
|
SET SESSION AUTHORIZATION view_user1;
|
||
|
GRANT INSERT, DELETE ON base_tbl TO view_user2;
|
||
|
RESET SESSION AUTHORIZATION;
|
||
|
|
||
|
SET SESSION AUTHORIZATION view_user2;
|
||
|
INSERT INTO base_tbl VALUES (3, 'Row 3', 3.0); -- ok
|
||
|
INSERT INTO rw_view1 VALUES ('Row 4', 4.0, 4); -- not allowed
|
||
|
INSERT INTO rw_view2 VALUES ('Row 4', 4.0, 4); -- ok
|
||
|
DELETE FROM base_tbl WHERE a=1; -- ok
|
||
|
DELETE FROM rw_view1 WHERE aa=2; -- not allowed
|
||
|
DELETE FROM rw_view2 WHERE aa=2; -- ok
|
||
|
SELECT * FROM base_tbl;
|
||
|
RESET SESSION AUTHORIZATION;
|
||
|
|
||
|
SET SESSION AUTHORIZATION view_user1;
|
||
|
REVOKE INSERT, DELETE ON base_tbl FROM view_user2;
|
||
|
GRANT INSERT, DELETE ON rw_view1 TO view_user2;
|
||
|
RESET SESSION AUTHORIZATION;
|
||
|
|
||
|
SET SESSION AUTHORIZATION view_user2;
|
||
|
INSERT INTO base_tbl VALUES (5, 'Row 5', 5.0); -- not allowed
|
||
|
INSERT INTO rw_view1 VALUES ('Row 5', 5.0, 5); -- ok
|
||
|
INSERT INTO rw_view2 VALUES ('Row 6', 6.0, 6); -- not allowed
|
||
|
DELETE FROM base_tbl WHERE a=3; -- not allowed
|
||
|
DELETE FROM rw_view1 WHERE aa=3; -- ok
|
||
|
DELETE FROM rw_view2 WHERE aa=4; -- not allowed
|
||
|
SELECT * FROM base_tbl;
|
||
|
RESET SESSION AUTHORIZATION;
|
||
|
|
||
|
DROP TABLE base_tbl CASCADE;
|
||
|
|
||
|
DROP USER view_user1;
|
||
|
DROP USER view_user2;
|
||
|
|
||
|
-- column defaults
|
||
|
|
||
|
CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified', c serial);
|
||
|
INSERT INTO base_tbl VALUES (1, 'Row 1');
|
||
|
INSERT INTO base_tbl VALUES (2, 'Row 2');
|
||
|
INSERT INTO base_tbl VALUES (3);
|
||
|
|
||
|
CREATE VIEW rw_view1 AS SELECT a AS aa, b AS bb FROM base_tbl;
|
||
|
ALTER VIEW rw_view1 ALTER COLUMN bb SET DEFAULT 'View default';
|
||
|
|
||
|
INSERT INTO rw_view1 VALUES (4, 'Row 4');
|
||
|
INSERT INTO rw_view1 (aa) VALUES (5);
|
||
|
|
||
|
SELECT * FROM base_tbl;
|
||
|
|
||
|
DROP TABLE base_tbl CASCADE;
|
||
|
|
||
|
-- Table having triggers
|
||
|
|
||
|
CREATE TABLE base_tbl (a int PRIMARY KEY, b text DEFAULT 'Unspecified');
|
||
|
INSERT INTO base_tbl VALUES (1, 'Row 1');
|
||
|
INSERT INTO base_tbl VALUES (2, 'Row 2');
|
||
|
|
||
|
CREATE FUNCTION rw_view1_trig_fn()
|
||
|
RETURNS trigger AS
|
||
|
$$
|
||
|
BEGIN
|
||
|
IF TG_OP = 'INSERT' THEN
|
||
|
UPDATE base_tbl SET b=NEW.b WHERE a=1;
|
||
|
RETURN NULL;
|
||
|
END IF;
|
||
|
RETURN NULL;
|
||
|
END;
|
||
|
$$
|
||
|
LANGUAGE plpgsql;
|
||
|
|
||
|
CREATE TRIGGER rw_view1_ins_trig AFTER INSERT ON base_tbl
|
||
|
FOR EACH ROW EXECUTE PROCEDURE rw_view1_trig_fn();
|
||
|
|
||
|
CREATE VIEW rw_view1 AS SELECT a AS aa, b AS bb FROM base_tbl;
|
||
|
|
||
|
INSERT INTO rw_view1 VALUES (3, 'Row 3');
|
||
|
select * from base_tbl;
|
||
|
|
||
|
DROP VIEW rw_view1;
|
||
|
DROP TRIGGER rw_view1_ins_trig on base_tbl;
|
||
|
DROP FUNCTION rw_view1_trig_fn();
|
||
|
DROP TABLE base_tbl;
|
||
|
|
||
|
-- view with ORDER BY
|
||
|
|
||
|
CREATE TABLE base_tbl (a int, b int);
|
||
|
INSERT INTO base_tbl VALUES (1,2), (4,5), (3,-3);
|
||
|
|
||
|
CREATE VIEW rw_view1 AS SELECT * FROM base_tbl ORDER BY a+b;
|
||
|
|
||
|
SELECT * FROM rw_view1;
|
||
|
|
||
|
INSERT INTO rw_view1 VALUES (7,-8);
|
||
|
SELECT * FROM rw_view1;
|
||
|
|
||
|
EXPLAIN (verbose, costs off) UPDATE rw_view1 SET b = b + 1 RETURNING *;
|
||
|
UPDATE rw_view1 SET b = b + 1 RETURNING *;
|
||
|
SELECT * FROM rw_view1;
|
||
|
|
||
|
DROP TABLE base_tbl CASCADE;
|
||
|
|
||
|
-- multiple array-column updates
|
||
|
|
||
|
CREATE TABLE base_tbl (a int, arr int[]);
|
||
|
INSERT INTO base_tbl VALUES (1,ARRAY[2]), (3,ARRAY[4]);
|
||
|
|
||
|
CREATE VIEW rw_view1 AS SELECT * FROM base_tbl;
|
||
|
|
||
|
UPDATE rw_view1 SET arr[1] = 42, arr[2] = 77 WHERE a = 3;
|
||
|
|
||
|
SELECT * FROM rw_view1;
|
||
|
|
||
|
DROP TABLE base_tbl CASCADE;
|