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Question 52/84
As part of a new integration, a developer is asked to implement a new custom search functional that is capable of performing unrestricted Queries and can account for all values within a custom picklist field. Type_ c, on the Opportunity object. The search feature must also account for NULL values.
The organization-wide default for the Opportunity object is set to Public Read-Only, and a new custom index has been created for the type_ c, field. There are more than 5 million Opportunity records within the environment, and a considerable amount of the existing records have NULL values for the picklist.
Which technique should the developer implement to maximize performance when querying NULL values?
The organization-wide default for the Opportunity object is set to Public Read-Only, and a new custom index has been created for the type_ c, field. There are more than 5 million Opportunity records within the environment, and a considerable amount of the existing records have NULL values for the picklist.
Which technique should the developer implement to maximize performance when querying NULL values?
Recent Comments (The most recent comments are at the top.)
Yes, I agree with Mauricio.
Correct option is D - Create a formula field that substitutes NULL values for a string of text, create an index for the formula field, then use the formula within the WHERE clause.
As part of a new integration, a developer is asked to implement a custom search functionality that:
Can perform unrestricted queries
Can account for all values including NULL in a custom picklist field Type__c on the Opportunity object
The Opportunity object has OWD = Public Read-Only
Custom index has been created for Type__c
Dataset contains over 5 million records with many NULLs
https://developer.salesforce.com/docs/atlas.en-us.salesforce_large_data_volumes_bp.meta/salesforce_large_data_volumes_bp/ldv_deployments_case_studies_indexing_with_nulls.htm
The best technique for the developer to implement to maximize performance when querying NULL values is:
D. Create a formula field that substitutes Null values for a sting of text, create an index for the formula field, then use the formula within the where cause.
This technique allows the developer to avoid querying NULL values directly, which can be inefficient and slow. By creating a formula field that replaces NULL values with a string of text, such as "None" or "N/A", the developer can create a custom index for the formula field and use it in the WHERE clause of the SOQL query. This will improve the performance and speed of the query, as well as avoid returning unwanted records that have NULL values in other fields.
The other techniques are not optimal for querying NULL values. Performing two SOQL queries and joining the result set using Apex (A) will consume more resources and time than a single query, and may hit governor limits. Using a SOSL query to return ALL opportunities that have a value of NULL in any field (B) will not be accurate, as it will include records that have NULL values in fields other than Type__c. Using the OR operator to combine WHERE clauses to strictly search for each value within the picklist, including Type__c =NULL (C) will not be efficient, as it will require scanning all the records in the table and may not use the custom index.
https://developer.salesforce.com/forums/?id=906F00000008kHsIAI...