Relational Operators

The following Relational Operators are supported in the Recital/4GL:

Operator	Operation
=	Equal To
==	Exactly Equal To / Matches Pattern
<>	Not Equal To
!=	Not Equal To
#	Not Equal To
>	Greater Than
>=	Greater Than or Equal To
<	Less Than
<=	Less Than or Equal To
$	Substring is Contained In
	Contains Substring

The Relational Operators are always evaluated from left to right.

The following ’wildcard’ characters can be used for == pattern matching:

Character	Action
?	Matches any one character
%	Matches any one character
*	Matches zero or more characters

In SQL mode (SET SQL ON or embedded EXEC SQL statements), the following wildcard characters are available:

Characters	Description
_	Matches any one character
%	Matches zero or more characters

Note: For FoxPro compatibility reasons, wildcard pattern matching is not available when SET COMPATIBLE is set to FOXPRO/FOXBASE/FOXPLUS/VFP.

Example

cSTR1 = [Welcome to the Recital/4GL]
? "Recital" $ cSTR1
.T.
 
cSTR2 = [Welcome]
// Compares to the end of cSTR2
? cSTR1 = cSTR2
.T.
 
// Compare contents & size
? cSTR1 == cSTR2
.F.