Questions and Answers
Check all the Snowflake Editions that have Search Optimization Service enabled. (Select all that apply)
Search Optimization Service is a ________ level property.
When a table is registered for search optimization service, it applies to all the columns.
True
Check all those options if they are valid for search optimization service. (Select all that apply)
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The search optimization service speeds only range searches.
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To add or remove search optimization for a table, you must have the necessary privileges. Select all that apply.
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The search optimization service does not support external tables.
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The search optimization service currently supports equality predicate and IN list predicate searches.
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Select applicable data types supported by search optimization service. (Select all that apply)
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The Snowflake optimizer automatically chooses when to use the search optimization service for a particular query. Users cannot control which queries search optimization is used for.
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The search optimization service relies on a maintenance service that runs in the background and is responsible for creating and maintaining the search access path.
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If you clone a table, schema or a database, the search optimization property and search access paths of each table are also cloned.
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The search optimization service creates a search access path data structure that requires space for each table on which search optimization is enabled.
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All tables, be it small or large, benefit from search optimization service.
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Clustering a table benefits BI users who need fast response times for critical dashboards with highly selective filters.
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Point lookup queries that benefit from the search optimization service. Select all that apply.
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The search optimization service does not directly improve the performance of joins.
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The following predicate is not supported because it uses a cast on values in the table column: where to_date(varchar_column) = '2022-12-29';
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Study Notes
Snowflake Query Optimization Service
- Search Optimization Service is available in Enterprise, Business Critical, and Virtual Private Snowflake (VPS) editions; Standard edition does not support it.
- It is a table-level property, meaning it can be applied to one or more complete tables rather than individual columns.
- When registered, search optimization applies to all columns of the table, provided the data types are supported.
- Implementing the search optimization service incurs compute and storage costs; it is not free, even in Business Critical editions.
- The service enhances performance for equality searches and IN predicate searches, not just range searches.
- Privileges required to modify search optimization status for a table include ownership on the table and specific schema privileges.
- External tables are not compatible with the search optimization service.
- Supported data types for search optimization include Integer, Variant, Date/Time/Timestamp, Varchar, Binary, Array, Object, and Geography Data.
- The Snowflake optimizer autonomously decides when to use the search optimization service for queries.
- A maintenance service operates in the background to manage the creation and upkeep of the search access path required for the service.
- Cloning a table, schema, or database also clones the search optimization properties and access paths associated with those tables.
- Enabling search optimization necessitates additional storage space for each table involved.
- Not all tables, regardless of size, benefit equally from the search optimization service.
- Queries with a high distinct value count and not clustered can gain from the search optimization service.
- The service does not enhance performance for join operations.
- Predicates that involve casts on table column values, such as using
to_datefunction, are unsupported.
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Description
This quiz focuses on the Snowflake Query Optimization Service, detailing its availability in different editions and the associated costs. It covers table-level properties, supported data types, performance enhancements, and necessary privileges for implementation. Test your knowledge on optimizing search capabilities in Snowflake.
