#!/usr/bin/env tclsh
set testdir [file dirname $argv0]
source $testdir/tester.tcl


do_execsql_test_on_specific_db {:memory:} simple-rollback {
    create table t (x);
    insert into t values (1);
    begin;
    insert into t values (2);
    rollback;
    select * from t;
} {1}

do_execsql_test_on_specific_db {:memory:} simple-rollback-2 {
    create table t (x);
    begin;
    insert into t values (1);
    insert into t values (2);
    rollback;
    select * from t;
} {}


do_execsql_test_on_specific_db {:memory:} rollback-after-update {
    create table t (x);
    insert into t values (1);
    insert into t values (2);
    begin;
    update t set x = x + 10;
    rollback;
    select * from t;
} {1 2}

do_execsql_test_on_specific_db {:memory:} rollback-after-delete {
    create table t (x);
    insert into t values (1);
    insert into t values (2);
    insert into t values (3);
    begin;
    delete from t where x = 2;
    rollback;
    select * from t order by x;
} {1 2 3}

do_execsql_test_on_specific_db {:memory:} rollback-mixed-operations {
    create table t (x);
    insert into t values (1);
    insert into t values (2);
    begin;
    insert into t values (3);
    update t set x = x + 10 where x = 1;
    delete from t where x = 2;
    rollback;
    select * from t order by x;
} {1 2}

# The point of this test was to test we drop dirty pages after rollback by inserting into another table so that 
# pages used are different.
do_execsql_test_on_specific_db {:memory:} insert-after-rollback {
    create table t (x);
    create table t2 (x);
    insert into t values (1);
    insert into t values (2);
    begin;
    insert into t values (3);
    update t set x = x + 10 where x = 1;
    delete from t where x = 2;
    rollback;
    insert into t2 values (1);
    select * from t2 order by x;
} {1}