mariadb/storage/duckdb/mysql-test/duckdb/t/dml_delete.test

--echo #
--echo # DuckDB DELETE operations test
--echo #

--disable_query_log
CREATE DATABASE IF NOT EXISTS db_dml_delete CHARACTER SET utf8mb4;
USE db_dml_delete;
SET GLOBAL duckdb_dml_in_batch = OFF;
--enable_query_log

# -----------------------------------------------------------------
# Setup: create and populate test tables
# -----------------------------------------------------------------
--echo # Setup

DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;

CREATE TABLE t1 (
  id INT PRIMARY KEY,
  val VARCHAR(50)
) ENGINE = DuckDB;

CREATE TABLE t2 (
  id INT PRIMARY KEY,
  val VARCHAR(50)
) ENGINE = DuckDB;

INSERT INTO t1 VALUES (1, 'one');
INSERT INTO t1 VALUES (2, 'two');
INSERT INTO t1 VALUES (3, 'three');
INSERT INTO t1 VALUES (4, 'four');
INSERT INTO t1 VALUES (5, 'five');

INSERT INTO t2 VALUES (1, 'alpha');
INSERT INTO t2 VALUES (3, 'beta');
INSERT INTO t2 VALUES (5, 'gamma');

# -----------------------------------------------------------------
# Test 1: DELETE single row by PK
# -----------------------------------------------------------------
--echo # Test 1: DELETE single row by PK

DELETE FROM t1 WHERE id = 1;
SELECT * FROM t1 ORDER BY id;

# -----------------------------------------------------------------
# Test 2: DELETE by non-PK condition
# -----------------------------------------------------------------
--echo # Test 2: DELETE by non-PK condition

DELETE FROM t1 WHERE val = 'three';
SELECT * FROM t1 ORDER BY id;

# -----------------------------------------------------------------
# Test 3: DELETE with range condition
# -----------------------------------------------------------------
--echo # Test 3: DELETE with range condition

DELETE FROM t1 WHERE id >= 4;
SELECT * FROM t1 ORDER BY id;

# -----------------------------------------------------------------
# Test 4: DELETE all rows
# -----------------------------------------------------------------
--echo # Test 4: DELETE all rows

DELETE FROM t1;
SELECT * FROM t1 ORDER BY id;
SELECT COUNT(*) FROM t1;

# -----------------------------------------------------------------
# Test 5: DELETE with subquery
# -----------------------------------------------------------------
--echo # Test 5: DELETE with subquery

INSERT INTO t1 VALUES (1, 'one');
INSERT INTO t1 VALUES (2, 'two');
INSERT INTO t1 VALUES (3, 'three');
INSERT INTO t1 VALUES (4, 'four');
INSERT INTO t1 VALUES (5, 'five');

DELETE FROM t1
  WHERE id IN (SELECT id FROM t2 FORCE INDEX(PRIMARY));
SELECT * FROM t1 ORDER BY id;

# -----------------------------------------------------------------
# Test 6: DELETE in transaction — COMMIT
# -----------------------------------------------------------------
--echo # Test 6: DELETE in transaction — COMMIT

--disable_query_log
DELETE FROM t1;
DELETE FROM t2;
INSERT INTO t1 VALUES (1, 'one');
INSERT INTO t1 VALUES (2, 'two');
INSERT INTO t1 VALUES (3, 'three');
--enable_query_log

BEGIN;
DELETE FROM t1 WHERE id = 2;
SELECT * FROM t1 ORDER BY id;
COMMIT;
SELECT * FROM t1 ORDER BY id;

# -----------------------------------------------------------------
# Test 7: DELETE in transaction — ROLLBACK
# -----------------------------------------------------------------
--echo # Test 7: DELETE in transaction — ROLLBACK

--disable_query_log
DELETE FROM t1;
INSERT INTO t1 VALUES (1, 'one');
INSERT INTO t1 VALUES (2, 'two');
INSERT INTO t1 VALUES (3, 'three');
--enable_query_log

BEGIN;
DELETE FROM t1 WHERE id = 2;
SELECT * FROM t1 ORDER BY id;
ROLLBACK;
SELECT * FROM t1 ORDER BY id;

# -----------------------------------------------------------------
# Cleanup
# -----------------------------------------------------------------
--disable_query_log
DROP TABLE t1;
DROP TABLE t2;
DROP DATABASE db_dml_delete;
USE test;
--enable_query_log