Communities
A collaborative platform to connect and grow with like-minded Informaticans across the globe
Product Communities
Connect and collaborate with Informatica experts and champions
Discussions
Have a question? Start a Discussion and get immediate answers you are looking for
User Groups
Customer-organized groups that meet online and in-person. Join today to network, share ideas, and get tips on how to get the most out of Informatica
Get Started
Community Guidelines
Knowledge Center
Troubleshooting documents, product guides, how to videos, best practices, and more
Knowledge Base
One-stop self-service portal for solutions, FAQs, Whitepapers, How Tos, Videos, and more
Support TV
Video channel for step-by-step instructions to use our products, best practices, troubleshooting tips, and much more
Documentation
Information library of the latest product documents
Velocity (Best Practices)
Best practices and use cases from the Implementation team
Learn
Rich resources to help you leverage full capabilities of our products
Trainings
Role-based training programs for the best ROI
Certifications
Get certified on Informatica products. Free, Foundation, or Professional
Product Learning Paths
Free and unlimited modules based on your expertise level and journey
Resources
Library of content to help you leverage the best of Informatica products
Tech Tuesdays Webinars
Most popular webinars on product architecture, best practices, and more
Product Availability Matrix
Product Availability Matrix statements of Informatica products
SupportFlash
Monthly support newsletter
Support Documents
Informatica Support Guide and Statements, Quick Start Guides, and Cloud Product Description Schedule
Product Lifecycle
End of Life statements of Informatica products
Ideas
Events
Change Request Tracking
Marketplace
English
  • Data Integration Connectors
  • All Products

Table of Contents

Search

  1. Preface
  2. Part 1: Getting Started with Snowflake Data Cloud Connector
  3. Part 2: Data Integration with Snowflake Data Cloud Connector
  4. Part 3: SQL ELT with Snowflake Data Cloud Connector
  5. Appendix A: Data type reference
  6. Appendix B: Additional runtime configurations
  7. Appendix C: Upgrading to Snowflake Data Cloud Connector

Snowflake Data Cloud Connector

Snowflake Data Cloud Connector

Back Next

Enable lookup caching

Enable lookup caching

When you configure a Lookup transformation in a mapping, you can cache the lookup data during the runtime session.
When you select
Lookup Caching Enabled
, Data Integration queries the lookup source once and caches the values for use during the session, which can improve performance. You can specify the directory to store the cached lookup. You can configure dynamic and persistent lookup caches.
For information about lookup caching, see the chapter "Lookup transformations" in
Transformations
 in the Data Integration documentation.
Dynamic lookup cache has the following restrictions:
  • When you configure dynamic lookup cache, set the
    On Multiple Matches
     property to
    Report Error
    . To reset the property, change the dynamic lookup to a static lookup, change the property, and then change the static lookup to a dynamic lookup. Ensure that all the lookup fields are mapped.
  • A lookup condition in dynamic lookups can use only an equal operator.
  • SQL ELT optimization is not applicable.
  • You cannot parameterize a Lookup transformation enabled to use dynamic lookup cache.

Using ORDER BY and WHERE clause

You can use the ORDER BY clause in a query in a connected and unconnected cached lookup if you configure the
-DENABLE_SORTED_INPUT_FOR_LKP=true
 property in the JVM options of the Secure Agent and enable the
Sorted Input
 option in the advanced lookup properties.
Consider the following guidelines when you use the ORDER BY clause:
  • When you configure a lookup condition to return all rows or any row, include the lookup fields in the ORDER BY statement.
  • When you configure a lookup condition to return first or last row, additionally include the fields mapped in the target in the ORDER BY statement.
When you use an uncached connected lookup to read from and write to Snowflake and the data has null values, configure the
-DENABLE_NULL_FLAG_FOR_UNCACHED_LOOKUP=true
 property in the JVM options of the Secure Agent to include the WHERE clause in the SQL statement.
0 COMMENTS
We’d like to hear from you!