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ESM Listener Operators and Conditionals

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ESM Listener Operators and Conditionals

Defining Operators in Listener Configuration XML

Operator In the Listener XML
Equals =
Greater or equal >=
Greater >
Is null IS NULL
Less or equal <=
Less <
Like LIKE
Not equal

!= 

or

<>
Not like NOT LIKE
Not null IS NOT NULL

Source Condition Operators

  Equals Greater or equal Greater Is null Less or equal Less Like / Not like Not equal Not null
Date With macros With macros With macros Yes With macros With macros No With macros Yes
Date & time With macros With macros With macros Yes With macros With macros No With macros Yes
External ref. No No No Yes No No No No Yes
Decimal Yes Yes Yes Yes Yes Yes No Yes Yes
Number Yes Yes Yes Yes Yes Yes No Yes Yes
Reference / Backreference No No No Yes No No Like / not like name No Yes
Embedded ref. No No No Yes No No No No Yes
String Yes No No Yes No No Yes Yes Yes
Text No No No Yes No No No No Yes

Target Condition Operators

  Equals Greater or equal Greater Is null Less or equal Less Like / Not like Not equal Not null
Date With macros With macros With macros Yes With macros With macros No With macros Yes
Date & time With macros Yes Yes Yes Yes Yes No With macros Yes
External ref. No No No Yes No No No No No
Decimal Yes Yes Yes Yes Yes Yes No Yes Yes
Number Yes Yes Yes Yes Yes Yes No Yes Yes
Reference / Backreference To and from source No No Yes No No Like / not like name No Yes
Embedded ref. No No No Yes No No No No No
String Yes No No Yes No No Yes Yes Yes
Text No No No Yes No No No No Yes

Support for Empty Values in Conditions

  Equals Greater or equal Greater Is null Less or equal Less Like / Not like Not equal Not null
Date Yes Yes Yes Yes Yes Yes No Yes Yes
Date & time Yes Yes Yes Yes Yes Yes No Yes Yes
External ref. No No No Yes No No No No Yes
Decimal Yes Yes Yes Yes Yes Yes No Yes Yes
Number Yes Yes Yes Yes Yes Yes No Yes Yes
Reference / Backreference To and from source No No Yes No No Like / not like name No Yes
Embedded ref. No No No Yes No No No No Yes
String Yes No No Yes No No Yes Yes Yes
Text No No No Yes No No No No Yes

Notes About Empty Values

For operators not supported for datatypes empty values are not considered. Is null and Is not null value conditions are naturally supported for each data type. They cannot be used with property conditions (two attributes' values cannot be compared with Is null or Is not null operator). 

To and From source special conditions do not match if the reference is empty.

Value conditions 

  • Only the attributes value can be empty. The value that is compared to the attribute cannot be empty i.e. null, you can use Is null operator to match with null values.
  • Equals, Like, Greater (or equal) than, Less (or equal) than operators never match with empty values.
  • Not equal and Not Like operators always match with empty values for all the data types they are supported.

Property conditions 

  • Is null and is not null operators are not supported.

Another value is null 

  • The behavior is similar to value conditions:
    • Equals, Like, Greater (or equal) than, Less (or equal) than operators never match with empty values. 
    • Not equal and Not Like operators always match with empty values for all the data types they are supported.

Both properties are null, not comparing same attributes in the same entity 

  • If source property conditions compare two different attributes or the target property condition compares two attributes (can be same attribute) and their values are empty, the condition never matches.

Both properties are null, comparing same attribute (old value to new value) 

  • If the source property condition compares the attribute's old value to new value, and both of the values are null, then the Equals and Like are true and rest of the operators are false.
  • Other operators always fail. 

 

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Related Articles

  • ESM Listener XML Structure
  • ESM Listener Lifecycle
  • ESM Listener Overview

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