add tests for rollback of views.

testing/materialized_views.test

@@ -385,3 +385,174 @@ do_execsql_test_on_specific_db {:memory:} matview-projections {
     SELECT * from v;
 } {4|3|7|22|3
 3|4|7|22|3}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-insert {
+    CREATE TABLE t(a INTEGER, b INTEGER);
+    INSERT INTO t VALUES (1, 10), (2, 20), (3, 30);
+   
+    CREATE MATERIALIZED VIEW v AS
+        SELECT * FROM t WHERE b > 15;
+   
+    SELECT * FROM v ORDER BY a;
+   
+    BEGIN;
+    INSERT INTO t VALUES (4, 40), (5, 50);
+    SELECT * FROM v ORDER BY a;
+    ROLLBACK;
+   
+    SELECT * FROM v ORDER BY a;
+} {2|20
+3|30
+2|20
+3|30
+4|40
+5|50
+2|20
+3|30}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-delete {
+    CREATE TABLE t(a INTEGER, b INTEGER);
+    INSERT INTO t VALUES (1, 10), (2, 20), (3, 30), (4, 40);
+   
+    CREATE MATERIALIZED VIEW v AS
+        SELECT * FROM t WHERE b > 15;
+   
+    SELECT * FROM v ORDER BY a;
+   
+    BEGIN;
+    DELETE FROM t WHERE a IN (2, 3);
+    SELECT * FROM v ORDER BY a;
+    ROLLBACK;
+   
+    SELECT * FROM v ORDER BY a;
+} {2|20
+3|30
+4|40
+4|40
+2|20
+3|30
+4|40}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-update {
+    CREATE TABLE t(a INTEGER, b INTEGER);
+    INSERT INTO t VALUES (1, 10), (2, 20), (3, 30);
+   
+    CREATE MATERIALIZED VIEW v AS
+        SELECT * FROM t WHERE b > 15;
+   
+    SELECT * FROM v ORDER BY a;
+   
+    BEGIN;
+    UPDATE t SET b = 5 WHERE a = 2;
+    UPDATE t SET b = 35 WHERE a = 1;
+    SELECT * FROM v ORDER BY a;
+    ROLLBACK;
+   
+    SELECT * FROM v ORDER BY a;
+} {2|20
+3|30
+1|35
+3|30
+2|20
+3|30}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-aggregation {
+    CREATE TABLE sales(product_id INTEGER, amount INTEGER);
+    INSERT INTO sales VALUES (1, 100), (1, 200), (2, 150), (2, 250);
+   
+    CREATE MATERIALIZED VIEW product_totals AS
+        SELECT product_id, SUM(amount) as total, COUNT(*) as cnt
+        FROM sales
+        GROUP BY product_id;
+   
+    SELECT * FROM product_totals ORDER BY product_id;
+   
+    BEGIN;
+    INSERT INTO sales VALUES (1, 50), (3, 300);
+    SELECT * FROM product_totals ORDER BY product_id;
+    ROLLBACK;
+   
+    SELECT * FROM product_totals ORDER BY product_id;
+} {1|300|2
+2|400|2
+1|350|3
+2|400|2
+3|300|1
+1|300|2
+2|400|2}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-mixed-operations {
+    CREATE TABLE orders(id INTEGER PRIMARY KEY, customer INTEGER, amount INTEGER);
+    INSERT INTO orders VALUES (1, 100, 50), (2, 200, 75), (3, 100, 25);
+   
+    CREATE MATERIALIZED VIEW customer_totals AS
+        SELECT customer, SUM(amount) as total, COUNT(*) as cnt
+        FROM orders
+        GROUP BY customer;
+   
+    SELECT * FROM customer_totals ORDER BY customer;
+   
+    BEGIN;
+    INSERT INTO orders VALUES (4, 100, 100);
+    UPDATE orders SET amount = 150 WHERE id = 2;
+    DELETE FROM orders WHERE id = 3;
+    SELECT * FROM customer_totals ORDER BY customer;
+    ROLLBACK;
+   
+    SELECT * FROM customer_totals ORDER BY customer;
+} {100|75|2
+200|75|1
+100|150|2
+200|150|1
+100|75|2
+200|75|1}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-filtered-aggregation {
+    CREATE TABLE transactions(id INTEGER, account INTEGER, amount INTEGER, type TEXT);
+    INSERT INTO transactions VALUES
+        (1, 100, 50, 'deposit'),
+        (2, 100, 30, 'withdraw'),
+        (3, 200, 100, 'deposit'),
+        (4, 200, 40, 'withdraw');
+   
+    CREATE MATERIALIZED VIEW deposits AS
+        SELECT account, SUM(amount) as total_deposits, COUNT(*) as cnt
+        FROM transactions
+        WHERE type = 'deposit'
+        GROUP BY account;
+   
+    SELECT * FROM deposits ORDER BY account;
+   
+    BEGIN;
+    INSERT INTO transactions VALUES (5, 100, 75, 'deposit');
+    UPDATE transactions SET amount = 60 WHERE id = 1;
+    DELETE FROM transactions WHERE id = 3;
+    SELECT * FROM deposits ORDER BY account;
+    ROLLBACK;
+   
+    SELECT * FROM deposits ORDER BY account;
+} {100|50|1
+200|100|1
+100|135|2
+100|50|1
+200|100|1}
+
+do_execsql_test_on_specific_db {:memory:} matview-rollback-empty-view {
+    CREATE TABLE t(a INTEGER, b INTEGER);
+    INSERT INTO t VALUES (1, 5), (2, 8);
+   
+    CREATE MATERIALIZED VIEW v AS
+        SELECT * FROM t WHERE b > 10;
+   
+    SELECT COUNT(*) FROM v;
+   
+    BEGIN;
+    INSERT INTO t VALUES (3, 15), (4, 20);
+    SELECT * FROM v ORDER BY a;
+    ROLLBACK;
+
+    SELECT COUNT(*) FROM v;
+} {0
+3|15
+4|20
+0}