# Kafka Connect AdjustPrecisionAndScale SMT Usage Reference for Confluent Cloud The `AdjustPrecisionAndScale` Single Message Transformation (SMT) is used to validate and ensure that all decimal fields in a Kafka Connect structure fall within a desired numerical range. For example, it allows you to set a maximum precision and maximum scale, and optionally require a positive scale, ensuring data integrity before it is written to a sink that has strict decimal requirements. ## Limitations - For Sink connectors, the Schema Registry schema is not updated by the `AdjustPrecisionAndScale` SMT. Since transforms run after the converter saves the schema, the Schema Registry retains the original precision and scale values. #### IMPORTANT Confluent only supports this SMT on Confluent Cloud. For complete details, see the official [AdjustPrecisionAndScale SMT](https://jcustenborder.github.io/kafka-connect-documentation/projects/kafka-connect-transform-common/transformations/AdjustPrecisionAndScale.html) documentation.