SMC Networks 6.20 manual Filter Formula syntax, Syntax for Simple Expressions

COLLECTING DATA WITH LOG MANAGER

Filter Formula syntax

The filter formula can be a simple or complex expression.

Syntax for Simple Expressions

A simple expression conforms to the following syntax:

Variable Relation Value

Variable - Legal variables include:

VALUE -- Value of the data

DATE --Date the data arrives

TIME --Time the data arrives

Relation - Legal relations include:

>-- Greater than

<-- Less than

>=	-- Greater than or Equal to
<=	-- Less than or Equal to

==-- Equal

!= -- Unequal

Value - Legal values include:

<INTEGER VALUE>	-- An unsigned integer, 0 ~ 4 bytes long.
<yyyymmdd>	-- Eight digits representing a date, where yyyy stands for the year, mm the month
	and dd the day
<hhmmss>	-- Six digits representing time in 24-hour format, where hh stands for hour, mm
	minutes and ss seconds

Syntax for Complex Expressions

A complex expression combines several simple expressions using logical operators. Each expression must be enclosed in parentheses. The syntax for a complex expression follows:

(Simple Expression) Logical_Operator (Simple Expression)

As described in the previous section a simple expressions should have three basic elements, namely, a Variable, Relation, and Value. Legal values for each element are described under the syntax for simple expressions.

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