406 lines
11 KiB
Plaintext
406 lines
11 KiB
Plaintext
-- Test basic TRUNCATE functionality.
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CREATE TABLE truncate_a (col1 integer primary key);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "truncate_a_pkey" for table "truncate_a"
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INSERT INTO truncate_a VALUES (1);
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INSERT INTO truncate_a VALUES (2);
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SELECT * FROM truncate_a;
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col1
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------
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1
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2
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(2 rows)
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-- Roll truncate back
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BEGIN;
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TRUNCATE truncate_a;
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ROLLBACK;
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SELECT * FROM truncate_a;
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col1
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------
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1
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2
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(2 rows)
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-- Commit the truncate this time
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BEGIN;
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TRUNCATE truncate_a;
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COMMIT;
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SELECT * FROM truncate_a;
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col1
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------
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(0 rows)
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-- Test foreign-key checks
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CREATE TABLE trunc_b (a int REFERENCES truncate_a);
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CREATE TABLE trunc_c (a serial PRIMARY KEY);
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NOTICE: CREATE TABLE will create implicit sequence "trunc_c_a_seq" for serial column "trunc_c.a"
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "trunc_c_pkey" for table "trunc_c"
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CREATE TABLE trunc_d (a int REFERENCES trunc_c);
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CREATE TABLE trunc_e (a int REFERENCES truncate_a, b int REFERENCES trunc_c);
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TRUNCATE TABLE truncate_a; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_b" references "truncate_a".
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HINT: Truncate table "trunc_b" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE truncate_a,trunc_b; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_e" references "truncate_a".
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HINT: Truncate table "trunc_e" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE truncate_a,trunc_b,trunc_e; -- ok
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TRUNCATE TABLE truncate_a,trunc_e; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_b" references "truncate_a".
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HINT: Truncate table "trunc_b" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_d" references "trunc_c".
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HINT: Truncate table "trunc_d" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,trunc_d; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_e" references "trunc_c".
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HINT: Truncate table "trunc_e" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,trunc_d,trunc_e; -- ok
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TRUNCATE TABLE trunc_c,trunc_d,trunc_e,truncate_a; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_b" references "truncate_a".
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HINT: Truncate table "trunc_b" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,trunc_d,trunc_e,truncate_a,trunc_b; -- ok
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TRUNCATE TABLE truncate_a RESTRICT; -- fail
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_b" references "truncate_a".
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HINT: Truncate table "trunc_b" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE truncate_a CASCADE; -- ok
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NOTICE: truncate cascades to table "trunc_b"
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NOTICE: truncate cascades to table "trunc_e"
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-- circular references
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ALTER TABLE truncate_a ADD FOREIGN KEY (col1) REFERENCES trunc_c;
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-- Add some data to verify that truncating actually works ...
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INSERT INTO trunc_c VALUES (1);
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INSERT INTO truncate_a VALUES (1);
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INSERT INTO trunc_b VALUES (1);
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INSERT INTO trunc_d VALUES (1);
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INSERT INTO trunc_e VALUES (1,1);
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TRUNCATE TABLE trunc_c;
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "truncate_a" references "trunc_c".
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HINT: Truncate table "truncate_a" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,truncate_a;
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_d" references "trunc_c".
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HINT: Truncate table "trunc_d" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,truncate_a,trunc_d;
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_e" references "trunc_c".
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HINT: Truncate table "trunc_e" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,truncate_a,trunc_d,trunc_e;
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ERROR: cannot truncate a table referenced in a foreign key constraint
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DETAIL: Table "trunc_b" references "truncate_a".
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HINT: Truncate table "trunc_b" at the same time, or use TRUNCATE ... CASCADE.
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TRUNCATE TABLE trunc_c,truncate_a,trunc_d,trunc_e,trunc_b;
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-- Verify that truncating did actually work
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SELECT * FROM truncate_a
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UNION ALL
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SELECT * FROM trunc_c
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UNION ALL
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SELECT * FROM trunc_b
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UNION ALL
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SELECT * FROM trunc_d;
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col1
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------
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(0 rows)
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SELECT * FROM trunc_e;
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a | b
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---+---
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(0 rows)
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-- Add data again to test TRUNCATE ... CASCADE
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INSERT INTO trunc_c VALUES (1);
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INSERT INTO truncate_a VALUES (1);
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INSERT INTO trunc_b VALUES (1);
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INSERT INTO trunc_d VALUES (1);
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INSERT INTO trunc_e VALUES (1,1);
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TRUNCATE TABLE trunc_c CASCADE; -- ok
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NOTICE: truncate cascades to table "truncate_a"
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NOTICE: truncate cascades to table "trunc_d"
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NOTICE: truncate cascades to table "trunc_e"
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NOTICE: truncate cascades to table "trunc_b"
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SELECT * FROM truncate_a
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UNION ALL
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SELECT * FROM trunc_c
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UNION ALL
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SELECT * FROM trunc_b
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UNION ALL
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SELECT * FROM trunc_d;
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col1
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------
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(0 rows)
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SELECT * FROM trunc_e;
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a | b
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---+---
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(0 rows)
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DROP TABLE truncate_a,trunc_c,trunc_b,trunc_d,trunc_e CASCADE;
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-- Test TRUNCATE with inheritance
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CREATE TABLE trunc_f (col1 integer primary key);
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NOTICE: CREATE TABLE / PRIMARY KEY will create implicit index "trunc_f_pkey" for table "trunc_f"
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INSERT INTO trunc_f VALUES (1);
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INSERT INTO trunc_f VALUES (2);
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CREATE TABLE trunc_fa (col2a text) INHERITS (trunc_f);
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INSERT INTO trunc_fa VALUES (3, 'three');
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CREATE TABLE trunc_fb (col2b int) INHERITS (trunc_f);
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INSERT INTO trunc_fb VALUES (4, 444);
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CREATE TABLE trunc_faa (col3 text) INHERITS (trunc_fa);
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INSERT INTO trunc_faa VALUES (5, 'five', 'FIVE');
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BEGIN;
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SELECT * FROM trunc_f;
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col1
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------
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1
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2
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3
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4
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5
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(5 rows)
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TRUNCATE trunc_f;
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SELECT * FROM trunc_f;
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col1
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------
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(0 rows)
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ROLLBACK;
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BEGIN;
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SELECT * FROM trunc_f;
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col1
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------
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1
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2
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3
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4
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5
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(5 rows)
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TRUNCATE ONLY trunc_f;
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SELECT * FROM trunc_f;
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col1
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------
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3
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4
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5
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(3 rows)
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ROLLBACK;
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BEGIN;
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SELECT * FROM trunc_f;
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col1
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------
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1
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2
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3
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4
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5
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(5 rows)
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SELECT * FROM trunc_fa;
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col1 | col2a
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------+-------
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3 | three
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5 | five
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(2 rows)
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SELECT * FROM trunc_faa;
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col1 | col2a | col3
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------+-------+------
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5 | five | FIVE
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(1 row)
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TRUNCATE ONLY trunc_fb, ONLY trunc_fa;
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SELECT * FROM trunc_f;
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col1
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------
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1
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2
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5
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(3 rows)
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SELECT * FROM trunc_fa;
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col1 | col2a
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------+-------
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5 | five
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(1 row)
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SELECT * FROM trunc_faa;
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col1 | col2a | col3
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------+-------+------
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5 | five | FIVE
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(1 row)
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ROLLBACK;
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BEGIN;
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SELECT * FROM trunc_f;
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col1
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------
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1
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2
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3
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4
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5
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(5 rows)
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SELECT * FROM trunc_fa;
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col1 | col2a
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------+-------
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3 | three
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5 | five
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(2 rows)
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SELECT * FROM trunc_faa;
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col1 | col2a | col3
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------+-------+------
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5 | five | FIVE
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(1 row)
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TRUNCATE ONLY trunc_fb, trunc_fa;
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SELECT * FROM trunc_f;
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col1
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------
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1
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2
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(2 rows)
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SELECT * FROM trunc_fa;
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col1 | col2a
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------+-------
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(0 rows)
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SELECT * FROM trunc_faa;
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col1 | col2a | col3
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------+-------+------
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(0 rows)
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ROLLBACK;
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DROP TABLE trunc_f CASCADE;
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NOTICE: drop cascades to 3 other objects
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DETAIL: drop cascades to table trunc_fa
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drop cascades to table trunc_faa
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drop cascades to table trunc_fb
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-- Test ON TRUNCATE triggers
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CREATE TABLE trunc_trigger_test (f1 int, f2 text, f3 text);
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CREATE TABLE trunc_trigger_log (tgop text, tglevel text, tgwhen text,
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tgargv text, tgtable name, rowcount bigint);
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CREATE FUNCTION trunctrigger() RETURNS trigger as $$
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declare c bigint;
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begin
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execute 'select count(*) from ' || quote_ident(tg_table_name) into c;
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insert into trunc_trigger_log values
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(TG_OP, TG_LEVEL, TG_WHEN, TG_ARGV[0], tg_table_name, c);
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return null;
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end;
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$$ LANGUAGE plpgsql;
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-- basic before trigger
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INSERT INTO trunc_trigger_test VALUES(1, 'foo', 'bar'), (2, 'baz', 'quux');
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CREATE TRIGGER t
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BEFORE TRUNCATE ON trunc_trigger_test
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FOR EACH STATEMENT
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EXECUTE PROCEDURE trunctrigger('before trigger truncate');
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SELECT count(*) as "Row count in test table" FROM trunc_trigger_test;
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Row count in test table
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-------------------------
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2
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(1 row)
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SELECT * FROM trunc_trigger_log;
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tgop | tglevel | tgwhen | tgargv | tgtable | rowcount
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------+---------+--------+--------+---------+----------
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(0 rows)
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TRUNCATE trunc_trigger_test;
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SELECT count(*) as "Row count in test table" FROM trunc_trigger_test;
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Row count in test table
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-------------------------
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0
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(1 row)
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SELECT * FROM trunc_trigger_log;
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tgop | tglevel | tgwhen | tgargv | tgtable | rowcount
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----------+-----------+--------+-------------------------+--------------------+----------
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TRUNCATE | STATEMENT | BEFORE | before trigger truncate | trunc_trigger_test | 2
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(1 row)
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DROP TRIGGER t ON trunc_trigger_test;
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truncate trunc_trigger_log;
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-- same test with an after trigger
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INSERT INTO trunc_trigger_test VALUES(1, 'foo', 'bar'), (2, 'baz', 'quux');
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CREATE TRIGGER tt
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AFTER TRUNCATE ON trunc_trigger_test
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FOR EACH STATEMENT
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EXECUTE PROCEDURE trunctrigger('after trigger truncate');
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SELECT count(*) as "Row count in test table" FROM trunc_trigger_test;
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Row count in test table
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-------------------------
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2
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(1 row)
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SELECT * FROM trunc_trigger_log;
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tgop | tglevel | tgwhen | tgargv | tgtable | rowcount
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------+---------+--------+--------+---------+----------
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(0 rows)
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TRUNCATE trunc_trigger_test;
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SELECT count(*) as "Row count in test table" FROM trunc_trigger_test;
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Row count in test table
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-------------------------
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0
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(1 row)
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SELECT * FROM trunc_trigger_log;
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tgop | tglevel | tgwhen | tgargv | tgtable | rowcount
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----------+-----------+--------+------------------------+--------------------+----------
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TRUNCATE | STATEMENT | AFTER | after trigger truncate | trunc_trigger_test | 0
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(1 row)
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DROP TABLE trunc_trigger_test;
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DROP TABLE trunc_trigger_log;
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DROP FUNCTION trunctrigger();
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-- test TRUNCATE ... RESTART IDENTITY
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CREATE SEQUENCE truncate_a_id1 START WITH 33;
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CREATE TABLE truncate_a (id serial,
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id1 integer default nextval('truncate_a_id1'));
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NOTICE: CREATE TABLE will create implicit sequence "truncate_a_id_seq" for serial column "truncate_a.id"
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ALTER SEQUENCE truncate_a_id1 OWNED BY truncate_a.id1;
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INSERT INTO truncate_a DEFAULT VALUES;
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INSERT INTO truncate_a DEFAULT VALUES;
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SELECT * FROM truncate_a;
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id | id1
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----+-----
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1 | 33
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2 | 34
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(2 rows)
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TRUNCATE truncate_a;
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INSERT INTO truncate_a DEFAULT VALUES;
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INSERT INTO truncate_a DEFAULT VALUES;
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SELECT * FROM truncate_a;
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id | id1
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----+-----
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3 | 35
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4 | 36
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(2 rows)
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TRUNCATE truncate_a RESTART IDENTITY;
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INSERT INTO truncate_a DEFAULT VALUES;
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INSERT INTO truncate_a DEFAULT VALUES;
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SELECT * FROM truncate_a;
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id | id1
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----+-----
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1 | 33
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2 | 34
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(2 rows)
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DROP TABLE truncate_a;
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SELECT nextval('truncate_a_id1'); -- fail, seq should have been dropped
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ERROR: relation "truncate_a_id1" does not exist
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LINE 1: SELECT nextval('truncate_a_id1');
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^
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