Release 10.1A: OpenEdge Development:
ADM Reference

assignQuerySelection

Selection criteria for a query. This is used by the column/value pairs of the corresponding buffer’s where-clause.

Location: query.p

Parameters:

INPUT pcColumns AS CHARACTER

A comma-separated list of column names.

INPUT pcValues AS CHARACTER

A CHR(1)-separated list of the corresponding values.

INPUT pcOperators AS CHARACTER

The operator (one for all columns):

A blank defaults to (EQ).
A slash defines alternative string operator (EQ/BEGINS, and so forth).
A comma-separated list for each column/value.
Returns: LOGICAL
Notes:

Each buffer’s expression is always enclosed in parentheses.
This procedure is designed to run on the client so that it can be called multiple times. This design lets you build up the query’s WHERE clause by storing intermediate results in the QueryString property before it is finally used in a Query–Prepare method.
openQuery helps prepare the QueryString property.
The QueryColumns property ensures that each column and operator is added only once to the QueryString. The property also stores the offset and length of the corresponding values.