This lecture introduces logical types in Avro, which are used to represent data types like decimals, UUIDs, dates, timestamps, and time. It explains how logical types are defined in Avro schemas with additional attributes and provides examples, particularly focusing on the decimal type. The lecture also covers other logical types such as UUID, date, time, timestamp, and duration, detailing their attributes and usage. The importance of precision and scale in representing decimal values is highlighted, along with the representation of time and timestamp with millisecond and microsecond precision. The lecture concludes by emphasizing the need for practical knowledge in applying these logical types.

What is the primary purpose of logical types in Avro?

• To simplify schema definitions

• To improve data compression

• To represent complex data types with additional attributes

• To enhance data security

Which logical type in Avro is used to represent a universally unique identifier?

• UUID

• Decimal

• Timestamp

• Date

How is a decimal logical type represented in Avro?

• As an integer

• As a fixed or bytes type

• As a float

• As a string

What is the precision of a timestamp logical type in Avro?

• One second

• One nanosecond

• One millisecond

• One microsecond

What does the duration logical type in Avro represent?

• A recurring time interval

• A specific time of day

• An amount of time defined by months, days, and milliseconds

• A fixed point in time