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17.28 Trigger Variable Comparison Types

The following table describes the valid types of comparisons you can use to express the relationship of a trigger variable to its value:

Type	Comparison	Notes
set	is set (exists)	Default
notset	not set (does not exist)	Same as specifying '!' before a variable
eq	equals
ne	not equal
gt	greater than	Integer values only
lt	less than	Integer values only
ge	greater than or equal to	Integer values only
le	less than or equal to	Integer values only