+ // Represents the boolean operation itself: overridden for CQLProxNode
+ String opXQL(int level) {
+ return(indent(level) + "<boolean>\n" +
+ indent(level+1) + "<value>" + op() + "</value>\n" +
+ indent(level) + "</boolean>\n");
+ }
+
+ public String toCQL() {
+ // ### We don't always need parens around the operands