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Question 588 - SnowPro Core discussion

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What are potential impacts of storing non-native values like dates and timestamps in a variant column in Snowflake?

A.

Faster query performance and increased storage consumption

Answers
A.

Faster query performance and increased storage consumption

B.

Slower query performance and increased storage consumption

Answers
B.

Slower query performance and increased storage consumption

C.

Faster query performance and decreased storage consumption

Answers
C.

Faster query performance and decreased storage consumption

D.

Slower query performance and decreased storage consumption

Answers
D.

Slower query performance and decreased storage consumption

Suggested answer: B

Explanation:

Storing non-native values, such as dates and timestamps, in a VARIANT column in Snowflake can lead to slower query performance and increased storage consumption. VARIANT is a semi-structured data type that allows storing JSON, AVRO, ORC, Parquet, or XML data in a single column. When non-native data types are stored as VARIANT, Snowflake must perform implicit conversion to process these values, which can slow down query execution. Additionally, because the VARIANT data type is designed to accommodate a wide variety of data formats, it often requires more storage space compared to storing data in native, strongly-typed columns that are optimized for specific data types.

The performance impact arises from the need to parse and interpret the semi-structured data on the fly during query execution, as opposed to directly accessing and operating on optimally stored data in its native format. Furthermore, the increased storage consumption is a result of the overhead associated with storing data in a format that is less space-efficient than the native formats optimized for specific types of data.

Snowflake Documentation on Semi-Structured Data: Semi-Structured Data

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asked 29/10/2024
Eric De La Vega
41 questions
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