Release 10.1A: OpenEdge Development:
Progress 4GL Reference

WHERE-STRING attribute

Returns the current WHERE clause used to link the child of the relation to its parent, beginning with the keyword WHERE but not including the FOR EACH phrase of a prepare statement.

This attribute evaluates to the query string that Progress generates for you based on the relation between parent and child buffers. You can use this attribute to build an extended query of your own based on the default relationship.

Data type: CHARACTER

Access: Readable

Applies to: Data-relation object handle