2 -- ALTER TABLE ADD COLUMN DEFAULT test
5 SET search_path = fast_default;
6 CREATE SCHEMA fast_default;
7 CREATE TABLE m(id OID);
8 INSERT INTO m VALUES (NULL::OID);
10 CREATE FUNCTION set(tabname name) RETURNS VOID
14 SET id = (SELECT c.relfilenode
15 FROM pg_class AS c, pg_namespace AS s
16 WHERE c.relname = tabname
17 AND c.relnamespace = s.oid
18 AND s.nspname = 'fast_default');
20 $$ LANGUAGE 'plpgsql';
22 CREATE FUNCTION comp() RETURNS TEXT
26 WHEN m.id = c.relfilenode THEN 'Unchanged'
29 FROM m, pg_class AS c, pg_namespace AS s
31 AND c.relnamespace = s.oid
32 AND s.nspname = 'fast_default');
34 $$ LANGUAGE 'plpgsql';
36 CREATE FUNCTION log_rewrite() RETURNS event_trigger
43 select into this_schema relnamespace::regnamespace::text
45 where oid = pg_event_trigger_table_rewrite_oid();
46 if this_schema = 'fast_default'
48 RAISE NOTICE 'rewriting table % for reason %',
49 pg_event_trigger_table_rewrite_oid()::regclass,
50 pg_event_trigger_table_rewrite_reason();
55 CREATE TABLE has_volatile AS
56 SELECT * FROM generate_series(1,10) id;
59 CREATE EVENT TRIGGER has_volatile_rewrite
61 EXECUTE PROCEDURE log_rewrite();
63 -- only the last of these should trigger a rewrite
64 ALTER TABLE has_volatile ADD col1 int;
65 ALTER TABLE has_volatile ADD col2 int DEFAULT 1;
66 ALTER TABLE has_volatile ADD col3 timestamptz DEFAULT current_timestamp;
67 ALTER TABLE has_volatile ADD col4 int DEFAULT (random() * 10000)::int;
71 -- Test a large sample of different datatypes
72 CREATE TABLE T(pk INT NOT NULL PRIMARY KEY, c_int INT DEFAULT 1);
76 INSERT INTO T VALUES (1), (2);
78 ALTER TABLE T ADD COLUMN c_bpchar BPCHAR(5) DEFAULT 'hello',
79 ALTER COLUMN c_int SET DEFAULT 2;
81 INSERT INTO T VALUES (3), (4);
84 ALTER TABLE T ADD COLUMN c_text TEXT DEFAULT 'world',
85 ALTER COLUMN c_bpchar SET DEFAULT 'dog';
87 INSERT INTO T VALUES (5), (6);
89 ALTER TABLE T ADD COLUMN c_date DATE DEFAULT '2016-06-02',
90 ALTER COLUMN c_text SET DEFAULT 'cat';
92 INSERT INTO T VALUES (7), (8);
94 ALTER TABLE T ADD COLUMN c_timestamp TIMESTAMP DEFAULT '2016-09-01 12:00:00',
95 ADD COLUMN c_timestamp_null TIMESTAMP,
96 ALTER COLUMN c_date SET DEFAULT '2010-01-01';
98 INSERT INTO T VALUES (9), (10);
100 ALTER TABLE T ADD COLUMN c_array TEXT[]
101 DEFAULT '{"This", "is", "the", "real", "world"}',
102 ALTER COLUMN c_timestamp SET DEFAULT '1970-12-31 11:12:13',
103 ALTER COLUMN c_timestamp_null SET DEFAULT '2016-09-29 12:00:00';
105 INSERT INTO T VALUES (11), (12);
107 ALTER TABLE T ADD COLUMN c_small SMALLINT DEFAULT -5,
108 ADD COLUMN c_small_null SMALLINT,
110 SET DEFAULT '{"This", "is", "no", "fantasy"}';
112 INSERT INTO T VALUES (13), (14);
114 ALTER TABLE T ADD COLUMN c_big BIGINT DEFAULT 180000000000018,
115 ALTER COLUMN c_small SET DEFAULT 9,
116 ALTER COLUMN c_small_null SET DEFAULT 13;
118 INSERT INTO T VALUES (15), (16);
120 ALTER TABLE T ADD COLUMN c_num NUMERIC DEFAULT 1.00000000001,
121 ALTER COLUMN c_big SET DEFAULT -9999999999999999;
123 INSERT INTO T VALUES (17), (18);
125 ALTER TABLE T ADD COLUMN c_time TIME DEFAULT '12:00:00',
126 ALTER COLUMN c_num SET DEFAULT 2.000000000000002;
128 INSERT INTO T VALUES (19), (20);
130 ALTER TABLE T ADD COLUMN c_interval INTERVAL DEFAULT '1 day',
131 ALTER COLUMN c_time SET DEFAULT '23:59:59';
133 INSERT INTO T VALUES (21), (22);
135 ALTER TABLE T ADD COLUMN c_hugetext TEXT DEFAULT repeat('abcdefg',1000),
136 ALTER COLUMN c_interval SET DEFAULT '3 hours';
138 INSERT INTO T VALUES (23), (24);
140 ALTER TABLE T ALTER COLUMN c_interval DROP DEFAULT,
141 ALTER COLUMN c_hugetext SET DEFAULT repeat('poiuyt', 1000);
143 INSERT INTO T VALUES (25), (26);
145 ALTER TABLE T ALTER COLUMN c_bpchar DROP DEFAULT,
146 ALTER COLUMN c_date DROP DEFAULT,
147 ALTER COLUMN c_text DROP DEFAULT,
148 ALTER COLUMN c_timestamp DROP DEFAULT,
149 ALTER COLUMN c_array DROP DEFAULT,
150 ALTER COLUMN c_small DROP DEFAULT,
151 ALTER COLUMN c_big DROP DEFAULT,
152 ALTER COLUMN c_num DROP DEFAULT,
153 ALTER COLUMN c_time DROP DEFAULT,
154 ALTER COLUMN c_hugetext DROP DEFAULT;
156 INSERT INTO T VALUES (27), (28);
158 SELECT pk, c_int, c_bpchar, c_text, c_date, c_timestamp,
159 c_timestamp_null, c_array, c_small, c_small_null,
160 c_big, c_num, c_time, c_interval,
161 c_hugetext = repeat('abcdefg',1000) as c_hugetext_origdef,
162 c_hugetext = repeat('poiuyt', 1000) as c_hugetext_newdef
169 -- Test expressions in the defaults
170 CREATE OR REPLACE FUNCTION foo(a INT) RETURNS TEXT AS $$
171 DECLARE res TEXT := '';
176 res := res || chr(ascii('a') + i);
180 END; $$ LANGUAGE PLPGSQL STABLE;
182 CREATE TABLE T(pk INT NOT NULL PRIMARY KEY, c_int INT DEFAULT LENGTH(foo(6)));
186 INSERT INTO T VALUES (1), (2);
188 ALTER TABLE T ADD COLUMN c_bpchar BPCHAR(5) DEFAULT foo(4),
189 ALTER COLUMN c_int SET DEFAULT LENGTH(foo(8));
191 INSERT INTO T VALUES (3), (4);
193 ALTER TABLE T ADD COLUMN c_text TEXT DEFAULT foo(6),
194 ALTER COLUMN c_bpchar SET DEFAULT foo(3);
196 INSERT INTO T VALUES (5), (6);
198 ALTER TABLE T ADD COLUMN c_date DATE
199 DEFAULT '2016-06-02'::DATE + LENGTH(foo(10)),
200 ALTER COLUMN c_text SET DEFAULT foo(12);
202 INSERT INTO T VALUES (7), (8);
204 ALTER TABLE T ADD COLUMN c_timestamp TIMESTAMP
205 DEFAULT '2016-09-01'::DATE + LENGTH(foo(10)),
207 SET DEFAULT '2010-01-01'::DATE - LENGTH(foo(4));
209 INSERT INTO T VALUES (9), (10);
211 ALTER TABLE T ADD COLUMN c_array TEXT[]
212 DEFAULT ('{"This", "is", "' || foo(4) ||
213 '","the", "real", "world"}')::TEXT[],
214 ALTER COLUMN c_timestamp
215 SET DEFAULT '1970-12-31'::DATE + LENGTH(foo(30));
217 INSERT INTO T VALUES (11), (12);
219 ALTER TABLE T ALTER COLUMN c_int DROP DEFAULT,
221 SET DEFAULT ('{"This", "is", "' || foo(1) ||
222 '", "fantasy"}')::text[];
224 INSERT INTO T VALUES (13), (14);
226 ALTER TABLE T ALTER COLUMN c_bpchar DROP DEFAULT,
227 ALTER COLUMN c_date DROP DEFAULT,
228 ALTER COLUMN c_text DROP DEFAULT,
229 ALTER COLUMN c_timestamp DROP DEFAULT,
230 ALTER COLUMN c_array DROP DEFAULT;
232 INSERT INTO T VALUES (15), (16);
240 DROP FUNCTION foo(INT);
242 -- Fall back to full rewrite for volatile expressions
243 CREATE TABLE T(pk INT NOT NULL PRIMARY KEY);
245 INSERT INTO T VALUES (1);
249 -- now() is stable, because it returns the transaction timestamp
250 ALTER TABLE T ADD COLUMN c1 TIMESTAMP DEFAULT now();
254 -- clock_timestamp() is volatile
255 ALTER TABLE T ADD COLUMN c2 TIMESTAMP DEFAULT clock_timestamp();
262 CREATE TABLE T (pk INT NOT NULL PRIMARY KEY);
266 INSERT INTO T SELECT * FROM generate_series(1, 10) a;
268 ALTER TABLE T ADD COLUMN c_bigint BIGINT NOT NULL DEFAULT -1;
270 INSERT INTO T SELECT b, b - 10 FROM generate_series(11, 20) a(b);
272 ALTER TABLE T ADD COLUMN c_text TEXT DEFAULT 'hello';
274 INSERT INTO T SELECT b, b - 10, (b + 10)::text FROM generate_series(21, 30) a(b);
277 SELECT c_bigint, c_text FROM T WHERE c_bigint = -1 LIMIT 1;
279 EXPLAIN (VERBOSE TRUE, COSTS FALSE)
280 SELECT c_bigint, c_text FROM T WHERE c_bigint = -1 LIMIT 1;
282 SELECT c_bigint, c_text FROM T WHERE c_text = 'hello' LIMIT 1;
284 EXPLAIN (VERBOSE TRUE, COSTS FALSE) SELECT c_bigint, c_text FROM T WHERE c_text = 'hello' LIMIT 1;
288 SELECT COALESCE(c_bigint, pk), COALESCE(c_text, pk::text)
290 ORDER BY pk LIMIT 10;
292 -- Aggregate function
293 SELECT SUM(c_bigint), MAX(c_text COLLATE "C" ), MIN(c_text COLLATE "C") FROM T;
296 SELECT * FROM T ORDER BY c_bigint, c_text, pk LIMIT 10;
298 EXPLAIN (VERBOSE TRUE, COSTS FALSE)
299 SELECT * FROM T ORDER BY c_bigint, c_text, pk LIMIT 10;
302 SELECT * FROM T WHERE c_bigint > -1 ORDER BY c_bigint, c_text, pk LIMIT 10;
304 EXPLAIN (VERBOSE TRUE, COSTS FALSE)
305 SELECT * FROM T WHERE c_bigint > -1 ORDER BY c_bigint, c_text, pk LIMIT 10;
307 -- DELETE with RETURNING
308 DELETE FROM T WHERE pk BETWEEN 10 AND 20 RETURNING *;
309 EXPLAIN (VERBOSE TRUE, COSTS FALSE)
310 DELETE FROM T WHERE pk BETWEEN 10 AND 20 RETURNING *;
313 UPDATE T SET c_text = '"' || c_text || '"' WHERE pk < 10;
314 SELECT * FROM T WHERE c_text LIKE '"%"' ORDER BY PK;
321 -- Combine with other DDL
322 CREATE TABLE T(pk INT NOT NULL PRIMARY KEY);
326 INSERT INTO T VALUES (1), (2);
328 ALTER TABLE T ADD COLUMN c_int INT NOT NULL DEFAULT -1;
330 INSERT INTO T VALUES (3), (4);
332 ALTER TABLE T ADD COLUMN c_text TEXT DEFAULT 'Hello';
334 INSERT INTO T VALUES (5), (6);
336 ALTER TABLE T ALTER COLUMN c_text SET DEFAULT 'world',
337 ALTER COLUMN c_int SET DEFAULT 1;
339 INSERT INTO T VALUES (7), (8);
341 SELECT * FROM T ORDER BY pk;
344 CREATE INDEX i ON T(c_int, c_text);
346 SELECT c_text FROM T WHERE c_int = -1;
350 -- query to exercise expand_tuple function
352 SELECT 1::int AS a , 2::int AS b
353 FROM generate_series(1,20) q;
355 ALTER TABLE t1 ADD COLUMN c text;
358 stddev(cast((SELECT sum(1) FROM generate_series(1,20) x) AS float4))
359 OVER (PARTITION BY a,b,c ORDER BY b)
365 -- test that we account for missing columns without defaults correctly
366 -- in expand_tuple, and that rows are correctly expanded for triggers
368 CREATE FUNCTION test_trigger()
374 raise notice 'old tuple: %', to_json(OLD)::text;
385 -- 2 new columns, both have defaults
386 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
387 INSERT INTO t (a,b,c) VALUES (1,2,3);
388 ALTER TABLE t ADD COLUMN x int NOT NULL DEFAULT 4;
389 ALTER TABLE t ADD COLUMN y int NOT NULL DEFAULT 5;
390 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
396 -- 2 new columns, first has default
397 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
398 INSERT INTO t (a,b,c) VALUES (1,2,3);
399 ALTER TABLE t ADD COLUMN x int NOT NULL DEFAULT 4;
400 ALTER TABLE t ADD COLUMN y int;
401 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
407 -- 2 new columns, second has default
408 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
409 INSERT INTO t (a,b,c) VALUES (1,2,3);
410 ALTER TABLE t ADD COLUMN x int;
411 ALTER TABLE t ADD COLUMN y int NOT NULL DEFAULT 5;
412 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
418 -- 2 new columns, neither has default
419 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
420 INSERT INTO t (a,b,c) VALUES (1,2,3);
421 ALTER TABLE t ADD COLUMN x int;
422 ALTER TABLE t ADD COLUMN y int;
423 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
429 -- same as last 4 tests but here the last original column has a NULL value
430 -- 2 new columns, both have defaults
431 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
432 INSERT INTO t (a,b,c) VALUES (1,2,NULL);
433 ALTER TABLE t ADD COLUMN x int NOT NULL DEFAULT 4;
434 ALTER TABLE t ADD COLUMN y int NOT NULL DEFAULT 5;
435 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
441 -- 2 new columns, first has default
442 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
443 INSERT INTO t (a,b,c) VALUES (1,2,NULL);
444 ALTER TABLE t ADD COLUMN x int NOT NULL DEFAULT 4;
445 ALTER TABLE t ADD COLUMN y int;
446 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
452 -- 2 new columns, second has default
453 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
454 INSERT INTO t (a,b,c) VALUES (1,2,NULL);
455 ALTER TABLE t ADD COLUMN x int;
456 ALTER TABLE t ADD COLUMN y int NOT NULL DEFAULT 5;
457 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
463 -- 2 new columns, neither has default
464 CREATE TABLE t (id serial PRIMARY KEY, a int, b int, c int);
465 INSERT INTO t (a,b,c) VALUES (1,2,NULL);
466 ALTER TABLE t ADD COLUMN x int;
467 ALTER TABLE t ADD COLUMN y int;
468 CREATE TRIGGER a BEFORE UPDATE ON t FOR EACH ROW EXECUTE PROCEDURE test_trigger();
474 -- make sure expanded tuple has correct self pointer
475 -- it will be required by the RI trigger doing the cascading delete
477 CREATE TABLE leader (a int PRIMARY KEY, b int);
478 CREATE TABLE follower (a int REFERENCES leader ON DELETE CASCADE, b int);
479 INSERT INTO leader VALUES (1, 1), (2, 2);
480 ALTER TABLE leader ADD c int;
481 ALTER TABLE leader DROP c;
484 -- check that ALTER TABLE ... ALTER TYPE does the right thing
486 CREATE TABLE vtype( a integer);
487 INSERT INTO vtype VALUES (1);
488 ALTER TABLE vtype ADD COLUMN b DOUBLE PRECISION DEFAULT 0.2;
489 ALTER TABLE vtype ADD COLUMN c BOOLEAN DEFAULT true;
492 ALTER b TYPE text USING b::text,
493 ALTER c TYPE text USING c::text;
496 -- also check the case that doesn't rewrite the table
498 CREATE TABLE vtype2 (a int);
499 INSERT INTO vtype2 VALUES (1);
500 ALTER TABLE vtype2 ADD COLUMN b varchar(10) DEFAULT 'xxx';
501 ALTER TABLE vtype2 ALTER COLUMN b SET DEFAULT 'yyy';
502 INSERT INTO vtype2 VALUES (2);
504 ALTER TABLE vtype2 ALTER COLUMN b TYPE varchar(20) USING b::varchar(20);
505 SELECT * FROM vtype2;
513 DROP FUNCTION test_trigger();
515 DROP FUNCTION set(name);
516 DROP FUNCTION comp();
518 DROP TABLE has_volatile;
519 DROP EVENT TRIGGER has_volatile_rewrite;
520 DROP FUNCTION log_rewrite;
521 DROP SCHEMA fast_default;
523 -- Leave a table with an active fast default in place, for pg_upgrade testing
524 set search_path = public;
525 create table has_fast_default(f1 int);
526 insert into has_fast_default values(1);
527 alter table has_fast_default add column f2 int default 42;
528 table has_fast_default;