What data message format does Arcadia support for Confluent/KSQL

Arcadia support is based on KSQL.

Refer to KSQL documentation on supported message formats

VALUE_FORMAT (required) Specifies the serialization format of the message value in the topic. Supported formats: JSON, DELIMITED (comma-separated value), and AVRO.

All those 3 types are fully supported. AVRO is preferred mostly for efficiency.

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