Xbasic

EXPRESSION_COMMON_FILTER_ELIMINATE Function

Syntax

New_Filter_String as C = EXPRESSION_COMMON_FILTER_ELIMINATE( C expression)

Arguments

New_Filter_String: A simplified version of Old_Filter_String.
expression: A character filter expression that evaluates to a logical value and filters records in a query.

Description

Simplify the filter expression if possible.

Example

filter = "state = 'ma' .and. state = 'ma'"
expression_common_filter_eliminate(filter) -> "state = 'ma'", because both clauses are the same
filter = "state = 'ma' .and. state = 'cd'"
expression_common_filter_eliminate(filter) -> "state = 'ma' .and. state = 'cd'"