🎄Twelve Days of SMT 🎄 - Day 9: Cast

The Cast Single Message Transform lets you change the data type of fields in a Kafka message, supporting numerics, string, and boolean.

Cast takes one argument listing the field(s) that you would like to transform and the target data type. Multiple fields can be specified by separating each specification with a comma.

"transforms" : "castTypes",
"transforms.castTypes.type" : "org.apache.kafka.connect.transforms.Cast$Value",
"transforms.castTypes.spec" : "cost:float32,units:int16"

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⏱️Time code:

00:00:00 Brief introduction
00:01:26 Inspecting the schema in the Schema Registry
00:02:09 Should you transform in the Source or the Sink?
00:03:18 Cast data types in Kafka Connect source connector
00:04:45 Examining the schema with data types set correctly
00:05:17 Tangent: Kafka Connect connects to lots of different systems :-)
00:06:42 Writing the data with a sink connector
00:07:57 Adding a TimestampConverter transform to the sink connector
00:09:55 Deleting Kafka Connect connectors selectively using peco
00:10:30 Recreating the sink connector with the TimestampConverter transform included
00:12:15 Recap

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