create table t1(f1 int primary key) engine=innodb;
# Create statement with FK on base column of stored column
create table t2(f1 int not null, f2 int as (f1) stored,
foreign key(f1) references t1(f1) on update cascade)engine=innodb;
ERROR HY000: Function or expression 'f1' cannot be used in the GENERATED ALWAYS AS clause of `f2`
create table t2(f1 int not null, f2 int as (f1) virtual, f3 int as (f2) stored,
foreign key(f1) references t1(f1) on update cascade)engine=innodb;
ERROR HY000: Function or expression 'f2' cannot be used in the GENERATED ALWAYS AS clause of `f3`
# adding new stored column during alter table copy operation.
create table t2(f1 int not null, f2 int as (f1) virtual,
foreign key(f1) references t1(f1) on update cascade)engine=innodb;
alter table t2 add column f3 int as (f1) stored, add column f4 int as (f1) virtual;
ERROR HY000: Function or expression 'f1' cannot be used in the GENERATED ALWAYS AS clause of `f3`
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `f1` int(11) NOT NULL,
  `f2` int(11) GENERATED ALWAYS AS (`f1`) VIRTUAL,
  KEY `f1` (`f1`),
  CONSTRAINT `t2_ibfk_1` FOREIGN KEY (`f1`) REFERENCES `t1` (`f1`) ON UPDATE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t2;
# adding foreign key constraint for base columns during alter copy.
create table t2(f1 int not null, f2 int as (f1) stored) engine=innodb;
alter table t2 add foreign key(f1) references t1(f1) on update cascade, algorithm=copy;
ERROR HY000: Function or expression 'f1' cannot be used in the GENERATED ALWAYS AS clause of `f2`
show create table t2;
Table	Create Table
t2	CREATE TABLE `t2` (
  `f1` int(11) NOT NULL,
  `f2` int(11) GENERATED ALWAYS AS (`f1`) STORED
) ENGINE=InnoDB DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci
drop table t2;
# adding foreign key constraint for base columns during online alter.
create table t2(f1 int not null, f2 int as (f1) stored) engine=innodb;
set foreign_key_checks = 0;
alter table t2 add foreign key(f1) references t1(f1) on update cascade, algorithm=inplace;
ERROR HY000: Function or expression 'f1' cannot be used in the GENERATED ALWAYS AS clause of `f2`
drop table t2;
# adding stored column via online alter.
create table t2(f1 int not null,
foreign key(f1) references t1(f1) on update cascade)engine=innodb;
alter table t2 add column f2 int as (f1) stored, algorithm=inplace;
ERROR HY000: Function or expression 'f1' cannot be used in the GENERATED ALWAYS AS clause of `f2`
drop table t2, t1;
#
# BUG#26731689 FK ON TABLE WITH GENERATED COLS: ASSERTION POS < N_DEF
#
CREATE TABLE s (a INT, b INT GENERATED ALWAYS AS (0) STORED,  c INT,
d INT GENERATED ALWAYS AS (0) VIRTUAL, e INT) ENGINE=innodb;
CREATE TABLE t (a INT) ENGINE=innodb;
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (e) REFERENCES t(a) ON UPDATE SET null;
ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 'c' in the referenced table 't'
ALTER  TABLE t ADD PRIMARY KEY(a);
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (e) REFERENCES t(a) ON UPDATE SET null;
DROP TABLE s,t;
CREATE TABLE s (a INT GENERATED ALWAYS AS (0) VIRTUAL,
b INT GENERATED ALWAYS AS (0) STORED,  c INT) ENGINE=innodb;
CREATE TABLE t (a INT) ENGINE=innodb;
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (c) REFERENCES t(a) ON UPDATE SET null;
ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 'c' in the referenced table 't'
ALTER  TABLE t ADD PRIMARY KEY(a);
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (c) REFERENCES t(a) ON UPDATE SET null;
DROP TABLE s,t;
CREATE TABLE s (a INT,  b INT GENERATED ALWAYS AS (0) STORED) ENGINE=innodb;
CREATE TABLE t (a INT PRIMARY KEY) ENGINE=innodb;
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (a) REFERENCES t(a) ON UPDATE SET null;
DROP TABLE s,t;
CREATE TABLE s (a INT, b INT) ENGINE=innodb;
CREATE TABLE t (a INT) ENGINE=innodb;
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (a) REFERENCES t(a) ON UPDATE SET null;
ERROR HY000: Failed to add the foreign key constraint. Missing index for constraint 'c' in the referenced table 't'
ALTER  TABLE t ADD PRIMARY KEY(a);
ALTER TABLE s ADD CONSTRAINT c FOREIGN KEY (a) REFERENCES t(a) ON UPDATE SET null;
DROP TABLE s,t;