Hello. I use h2, have varchar column and want update column: concatenate current value and additional value. For example, current value of column ",1,2," and I want add "3," and get finally ",1,2,3,". I try to use code like this from documentation (but in documentation it's integer column).

Lessons.update(where = { Lessons.id eq lessonId }) {
            with(SqlExpressionBuilder) {
                it.update(column, column + "$entityId$ELEM_COLLECTION_SEPARATOR")
            }
        }

But it throws exception

Caused by: org.h2.jdbc.JdbcSQLFeatureNotSupportedException: Feature not supported: "VARCHAR +"; SQL statement:
UPDATE LESSONS SET CAME_STUDENTS=LESSONS.CAME_STUDENTS+? WHERE LESSONS.ID = ?

Exposed version 0.20.3. Oh, sorry to bother, I understood, that I should just use SqlExpressionBuilder.concat(column, stringLiteral("$entityId$ELEM_COLLECTION_SEPARATOR"))

Please use

concat

function like:

it[column] = concat(column, Lessons.id, stringLiteral(ELEM_COLLECTION_SEPARATOR))