Xbasic

A5_COMBINE_FILTERS Function

Syntax

New_Filter as C = a5_combine_filters(C filter1 ,C filter2 [,L flatten [,L sqlsyntax ]])

Arguments

filter1: A character filter expression that evaluates to a logical value and selects records.
filter2: A character filter expression that evaluates to a logical value and selects records.
flatten: Logical. Optional. Default = .F. .T. = calls the FLATTENQUERY()function after combining filters .F. = just combine the filters
sqlsyntax: Logical

Description

Takes two filters, either of which is sub-selected, and combines into a single filter expression

Discussion

The A5_COMBINE_FILTERS() function combines two filter expressions into a single expression.

This example just combines two filter expressions.

dim fil1 as C
dim fil2 as C
dim fil3 as C
fil1 = "customer->lastname > 'A'"
fil2 = "customer->bill_state_region > 'MA'"
fil3 = a5_combine_filters(fil1, fil2, .f.)
? fil3 -> "(customer->lastname > 'A') .and. (customer->bill_state_region > 'MA')"

This example also calls the FLATTENQUERY() function.

dim fil1 as C
dim fil2 as C
dim fil3 as C
fil1 = "customer->lastname > 'A'"
fil2 = "customer->bill_state_region > 'MA'"
fil3 = a5_combine_filters(fil1, fil2, .t.)
? fil3 -> "flattenquery((customer->lastname > 'A') .and. (customer->bill_state_region > 'MA'))"