Force.com Streaming API Developer Guide

Getting Started with Force.com Streaming API
Code Examples
Using Streaming API
Working with PushTopics
PushTopic Queries
Event Notification Rules
Events
Notifications
NotifyForFields Set to All
NotifyForFields Set to Referenced
NotifyForFields Set to Select
NotifyForFields Set to Where
Notification Scenarios
Replay PushTopic Streaming Events
Filtered Subscriptions
Bulk Subscriptions
Deactivating a Push Topic
Streaming API Considerations
Generic Streaming
Reference
PDF

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NotifyForFields Set to Where

When you set the value of PushTopic.NotifyForFields to Where, a change to any field value in the record as long as that field is referenced in the query WHERE clause causes the Streaming API matching logic to evaluate the record to determine if a notification should be generated.

If the PushTopic.NotifyForFields value is Where, then the PushTopic query must have a WHERE clause with at least one field other than Id.

Event A notification is generated when
Record is created The record field values match the values specified in the WHERE clause
Record is updated
  • A change occurs in one or more record fields that are specified in the PushTopic query WHERE clause and
  • The record values of the fields specified in the WHERE clause all match the values in the PushTopic query WHERE clause

Examples

PushTopic Query Result
SELECT Id, f1, f2 FROM InvoiceStatement__c WHERE f3 = 'abc' AND f4 LIKE 'xyz' Generates a notification if f3 or f4 have changed and the values match the values in the WHERE clause.
SELECT Id FROM InvoiceStatement__c WHERE f3 = 'abc' AND f4 LIKE 'xyz' Generates a notification if f3 or f4 have changed and the values match the values in the WHERE clause.
SELECT Id, f1, f2 FROM InvoiceStatement__c WHERE f3 = 'abc' AND f4 LIKE 'xyz' AND Id IN ('a07B0000000KWZ7IAO', 'e10R0000000KEU9IAO', 'v32B0000000KWZ7YEP') Generates a notification if f3 or f4 have changed, f3 and f4 match the values in the WHERE clause, and the record ID is contained in the WHERE clause IN list.