Hi, i tried the constraints option like that : the film_id has no nulls but it didn't abort also the rating data has "PG" in the data and still it run successful --------------------------------------- source: sakila_duck target: sakila_db defaults: object: 'stg.{stream_table}' mode: full-refresh streams: main.film: columns: rating: string | value in ('PG', 'PG-13', 'R', 'NC-17') film_id: int | value is null env: SLING_THREADS: 1 SLING_ON_CONSTRAINT_FAILURE: abort

hey @itamar s found it, a bug. Fixed for next release, thanks for raising.