public void setSelectedColumns(java.util.Collection<Option> selectedColumns) {
        if (selectedColumns == null) {
            this.selectedColumns = null;
            return;
        }

        this.selectedColumns = new java.util.ArrayList<Option>(selectedColumns);
    }
<p>
The list of column names used to determine a matching record when doing a MERGE or APPEND with upsert.
</p>

@param selectedColumns
       The list of column names used to determine a matching record when doing a MERGE or APPEND with upsert.
aws-java-sdk-glue/src/main/java/com/amazonaws/services/glue/model/AmazonRedshiftNodeData.java