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- Predefined Operators
  - contains
  - equalsSet
  - has
  - in
  - match
  - notMatch
  - search
  - unique
  - group by
  - distinct
  - unmatched
- Using the distinct, group by, and ummatched Filters
DRQL
Working with Rules
Working with Alerts
Setting Access Controls
Troubleshooting RulePoint Issues
Connecting to an Ultra Messaging Application
Creating an Ultra Messaging JMS Source

User Guide

6.1.2
- 6.2
- 6.1

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unique

The unique operator is a unary operator that verifies that all events have a different value for the specified property.

You cannot reference more than one property for a topic of a rule. The unique operator works with one property for a topic of a rule.

For example, the following rule verifies that three credit card transactions were processed by different merchants:

WHEN 3 transaction t WITH unique(t.Merch_ID) then response

The following rule verifies that three credit card transactions were processed by different merchants and the total transaction value is greater than $500:

WHEN 3 transaction  t WITH unique(t.Merch_ID) AND sum(t.Purchase_Amt) > 500 then response

Consider that two stock topic events have the different symbols, and two bond events have different symbols. The following rule verifies that the stock symbols do not require to be different from the bond symbols:

WHEN 2 stock s, 2 bond b WITH unique(s.symbol) AND unique(b.symbol) then response

The following rule provides the same result using a concatenated syntax:

WHEN 2 stock s, 2 bond b WITH unique(s.symbol, b.symbol)  then response

The unique operator is deprecated. The "distinct" operator replaces the "unique" operator.

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