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-- Test basic TRUNCATE functionality.
CREATE TABLE truncate_a (col1 integer primary key);
NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "truncate_a_pkey" for table "truncate_a"
INSERT INTO truncate_a VALUES (1);
INSERT INTO truncate_a VALUES (2);
SELECT * FROM truncate_a;
col1
------
1
2
(2 rows)
-- Roll truncate back
BEGIN;
TRUNCATE truncate_a;
ROLLBACK;
SELECT * FROM truncate_a;
col1
------
1
2
(2 rows)
-- Commit the truncate this time
BEGIN;
TRUNCATE truncate_a;
COMMIT;
SELECT * FROM truncate_a;
col1
------
(0 rows)
-- Test foreign constraint check
CREATE TABLE truncate_b(col1 integer references truncate_a);
INSERT INTO truncate_a VALUES (1);
SELECT * FROM truncate_a;
col1
------
1
(1 row)
TRUNCATE truncate_a;
ERROR: cannot truncate a table referenced in a foreign key constraint
DETAIL: Table "truncate_b" references "truncate_a" via foreign key constraint "$1".
SELECT * FROM truncate_a;
col1
------
1
(1 row)
DROP TABLE truncate_b;
DROP TABLE truncate_a;
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