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


do_execsql_test_on_specific_db {:memory:} basic-update {
    create table temp (t1 integer);
    insert into temp values (1);
	update temp set t1 = 2;
	select * from temp;
} {2}

do_execsql_test_on_specific_db {:memory:} update-mul {
    create table temp (t1 integer);
    insert into temp values (1),(2.0),('3'),('4.0');
	update temp set t1 = 2;
	select * from temp;
} {2
2
2
2}

do_execsql_test_on_specific_db {:memory:} update-where {
    create table temp (a,b,c);
    insert into temp values (1,2,33);
    insert into temp values (1,22,33);
    insert into temp values (1,22,33);
	update temp set a = 6 where b = 2;
	select * from temp;
} {6|2|33
1|22|33
1|22|33}


do_execsql_test_on_specific_db {:memory:} update-where-2 {
    create table temp (a,b,c);
    insert into temp values (1,22,33);
    insert into temp values (1,22,33);
    insert into temp values (1,22,33);
    insert into temp values (6,22,33);
    insert into temp values (1,22,33);
    insert into temp values (1,22,33);
	update temp set b = 100000 where a = 6;
	select b from temp where a = 6;
} {100000}


do_execsql_test_on_specific_db {:memory:} update-all-many {
    create table temp (a,b,c);
    insert into temp values (1,22,33),(1,22,33),(1,22,33),(1,22,33),(1,22,33),(1,22,33),(1,22,33),(1,22,33);
	update temp set a = 1234234234234234;
	select COUNT(*) from temp where a = 1234234234234234;
} {8}

do_execsql_test_on_specific_db {:memory:} update-large-small {
	create table temp (a,b,c);
	insert into temp values (randomblob(1024), 1, 2);
	update temp set a = 'a';
	select * from temp;
} {a|1|2}


do_execsql_test_on_specific_db {:memory:} update-null {
    create table temp (a,b,c);
    insert into temp values (NULL, 1, 2);
    insert into temp values (3, 4, 5);
    update temp set a = 10 where a IS NULL;
    select * from temp;
} {10|1|2
3|4|5}

do_execsql_test_on_specific_db {:memory:} update-mixed-types {
    create table temp (a);
    insert into temp values (1);
    insert into temp values ('2');
    insert into temp values (3.0);
    insert into temp values (X'01');
    update temp set a = 'updated';
    select * from temp;
} {updated
updated
updated
updated}

do_execsql_test_on_specific_db {:memory:} update-with-expression {
    create table temp (a, b);
    insert into temp values (1, 10);
    insert into temp values (2, 20);
    insert into temp values (3, 30);
    update temp set a = b * 3 / 2;
    select * from temp;
} {15|10
30|20
45|30}

do_execsql_test_on_specific_db {:memory:} update-self-reference {
    create table temp (a, b);
    insert into temp values (1, 10);
    insert into temp values (2, 20);
    update temp set a = b where a = 1;
    select * from temp;
} {10|10
2|20}

do_execsql_test_on_specific_db {:memory:} update-self-ref-all {
    create table temp (a, b, c);
    insert into temp values (1, 2, 3);
    insert into temp values (4, 5, 6);
    update temp set a = b;
    select * from temp;
} {2|2|3
5|5|6}

do_execsql_test_on_specific_db {:memory:} update-large-text {
    create table temp (a);
    insert into temp values ('short');
    update temp set a = 'this is a very large text field that exceeds the default cell size and should trigger overflow handling in the btree implementation';
    select * from temp;
} {{this is a very large text field that exceeds the default cell size and should trigger overflow handling in the btree implementation}}

do_execsql_test_on_specific_db {:memory:} update-with-null-condition {
    create table temp (a, b);
    insert into temp values (NULL, 1);
    insert into temp values (2, NULL);
    insert into temp values (3, 4);
    update temp set a = 99 where b IS NULL;
    select * from temp;
} {|1
99|
3|4}

do_execsql_test_on_specific_db {:memory:} update-to-null {
    create table temp (a, b);
    insert into temp values (1, 10);
    insert into temp values (2, 20);
    update temp set a = NULL where b = 10;
    select * from temp;
} {|10
2|20}

do_execsql_test_on_specific_db {:memory:} update-with-randomblob {
    create table temp (a, b);
    insert into temp values (randomblob(100), 1);
    update temp set a = randomblob(200);
    select length(a) from temp;
} {200}

do_execsql_test_on_specific_db {:memory:} update-multiple-columns {
    create table temp (a, b, c);
    insert into temp values (1, 2, 3);
    insert into temp values (4, 5, 6);
    update temp set a = 10, b = 20, c = 30;
    select * from temp;
} {10|20|30
10|20|30}

do_execsql_test_on_specific_db {:memory:} update-true-expr {
    create table temp (a, b, c);
    insert into temp values (1, 2, 3);
    insert into temp values (4, 5, 6);
    update temp set a = 10, b = 20, c = 30 where 1;
    select * from temp;
} {10|20|30
10|20|30}