Using regexp_substr on table with engine=columnstore results in error:"Function 'regexp_substr' isn't supported."

Using regexp_substr on table with engine=columnstore results in error:

ERROR 1178 (42000): The storage engine for the table doesn't support MCS-1001: Function 'regexp_substr' isn't supported.

To reproduce:
create table t3(a int not null, b varchar(100)) engine=columnstore;
insert into t3 values(1, 'My mouse'),(2,'Breakfast Food');
select a, regexp_substr(b, 'a|e|i|o|u') AS "vowel" from t3;

works with engine=innodb.