#
# Check of check constraints

set @save_check_constraint=@@check_constraint_checks;

create table t1 (a int check(a>10), b int check (b > 20), constraint `min` check (a+b > 100), constraint `max` check (a+b <500)) engine=myisam;
show create table t1;
insert into t1 values (100,100);
--error ER_CONSTRAINT_FAILED
insert into t1 values (1,1);
--error ER_CONSTRAINT_FAILED
insert into t1 values (20,1);
--error ER_CONSTRAINT_FAILED
insert into t1 values (20,30);
--error ER_CONSTRAINT_FAILED
insert into t1 values (500,500);

--error ER_CONSTRAINT_FAILED
insert into t1 values (101,101),(102,102),(600,600),(103,103);
select * from t1;
truncate table t1;
insert ignore into t1 values (101,101),(102,102),(600,600),(103,103);
select * from t1;
set check_constraint_checks=0;
truncate table t1;
insert into t1 values (101,101),(102,102),(600,600),(103,103);
select * from t1;
set check_constraint_checks=@save_check_constraint;

--error ER_CONSTRAINT_FAILED
alter table t1 add c int default 0 check (c < 10);

set check_constraint_checks=0;
alter table t1 add c int default 0 check (c < 10);
alter table t1 add check (a+b+c < 500);
set check_constraint_checks=@save_check_constraint;

show create table t1;
--error ER_CONSTRAINT_FAILED
insert into t1 values(105,105,105);
--error ER_CONSTRAINT_FAILED
insert into t1 values(249,249,9);
insert into t1 values(105,105,9);
select * from t1;

create table t2 like t1;
show create table t2;
--error ER_CANT_DROP_FIELD_OR_KEY
alter table t2 drop constraint c;
alter table t2 drop constraint if exists c;
alter table t2 drop constraint min;
show create table t2;

drop table t1,t2;

#
# check constraint name auto-generation:
#
create or replace table t1 (a int, b int, constraint check (a>b));
show create table t1;
create or replace table t1 (a int, b int,
  constraint CONSTRAINT_1 check (a>1),
  constraint check (b>1));
show create table t1;
create or replace table t1 (a int, b int,
  constraint CONSTRAINT_1 check (a>1),
  constraint check (b>1),
  constraint CONSTRAINT_2 check (a>b));
show create table t1;
drop table t1;

#
# MDEV-10370 Check constraints on virtual columns fails on INSERT when column not specified
#
create table t1(c1 int, c2 int as (c1 + 1), check (c2 > 2));
--error ER_CONSTRAINT_FAILED
insert into t1(c1) values(1);
insert into t1(c1) values(2);
drop table t1;

#
# MDEV-11117 CHECK constraint fails on intermediate step of ALTER
#
-- error ER_GENERATED_COLUMN_FUNCTION_IS_NOT_ALLOWED
create or replace table t1( c1 int auto_increment primary key, check( c1 > 0 or c1 is null ) );

#
# MDEV-12421 Check constraint with query crashes server and renders DB unusable
#
--error ER_GENERATED_COLUMN_FUNCTION_IS_NOT_ALLOWED
create table t1 (a int check (@b in (select user from mysql.user)));
--error ER_GENERATED_COLUMN_FUNCTION_IS_NOT_ALLOWED
create table t1 (a int check (a > @b));

#
# MDEV-13596 CHECK constraints disallow NULL to pass through, violating SQL
#
create table t1 (a int check (a = 1));
insert t1 values (1);
--error ER_CONSTRAINT_FAILED
insert t1 values (2);
insert t1 values (NULL);
select * from t1;
drop table t1;

#
# MDEV-15141 Check constraint validation on a datetime field crashes the process
#
create table t1 (id int auto_increment primary key, datecol datetime, check (datecol>'0001-01-01 00:00:00'));
insert into t1 (datecol) values (now());
insert into t1 (datecol) values (now());
drop table t1;

#
# MDEV-15461 Check Constraints with binary logging makes insert inconsistent
#

CREATE TABLE t1 (
  EmployeeID SMALLINT UNSIGNED AUTO_INCREMENT PRIMARY KEY,
  FirstName VARCHAR(30) NOT NULL CHECK (CHAR_LENGTH(FirstName > 2))
);

--error ER_TRUNCATED_WRONG_VALUE
INSERT INTO t1 VALUES (NULL, 'Ken');
SHOW WARNINGS;
--error ER_TRUNCATED_WRONG_VALUE
INSERT INTO t1 VALUES (NULL, 'Ken'),(NULL, 'Brian');
SHOW WARNINGS;
INSERT IGNORE INTO t1 VALUES (NULL, 'Ken');
INSERT IGNORE INTO t1 VALUES (NULL, 'Ken'),(NULL, 'Brian');
set sql_mode="";
INSERT INTO t1 VALUES (NULL, 'Ken');
INSERT INTO t1 VALUES (NULL, 'Ken'),(NULL, 'Brian');
set sql_mode=default;
select * from t1;
drop table t1;

--echo #
--echo # MDEV-16630: Ambiguous error message when check constraint
--echo #             matches table name
--echo #

use test;
--disable_warnings
drop table if exists t;
--enable_warnings

create table t(a int, b int check(b>0),
               constraint b check(a<b), constraint a check(a>0),
               constraint x check (a>10));

show create table t;

# Generate error when field constraint 'b' is violated
--echo # Field constraint 'b' will fail
--error ER_CONSTRAINT_FAILED
insert into t values (-1, 0);

# Generate error when table constraint 'b' is violated.
--echo # Table constraint 'b' will fail
--error ER_CONSTRAINT_FAILED
insert into t values (1,1);

drop table t;

#
# check constraints and auto_is_null typo
#
create table t1 (a int auto_increment primary key, b int, check (b > 5));
--error ER_CONSTRAINT_FAILED
insert t1 (b) values (1);
insert t1 (b) values (10);
select * from t1 where a is null;
set sql_auto_is_null=1;
select * from t1 where a is null;
--error ER_CONSTRAINT_FAILED
insert t1 (b) values (1);
drop table t1;
