How to use 'sum' expression with 'case-when'

I tried to convert below query to Kotlin-jdsl.

SELECT  id,
        SUM( CASE WHEN role IN ('A','B') THEN amount ELSE 0 END ) AS balance
FROM    TEST_TABLE
GROUP BY id

return query.listQuery {
    selectMulti(
        col(TestTable::id),
        sum(case(
          `when`(col(TestTable::role).`in`("A","B")).then(col(TestTable::occurAmount)),
          `else` = literal(0L)
        )),
    )
    from(entity(TestTable::class))
    groupBy(
        col(TestTable::id),
    )
}

But it could not possible because SumSpec might not support below syntax.

  sum(case(
    `when`(col(TestTable::role).`in`("A","B")).then(col(TestTable::occurAmount)),
    `else` = literal(0L)
  )),

Is there way to possible using sum expression with case-when ?

[cj848]

I’m glad you enjoyed using it. How do you feel about using it? I’m curious because we haven’t received feedback from real users yet.

– korean 잘 사용해주셔서 기쁩니다. 써보시니 어떠신가요? 아직 실제 유저의 피드백을 받지 못해 궁금합니다.

[nayasis]

Thank you so much. It works well 😃