// see if the table is full of attribute independent expressions
FilterAttributeExtractor extractor = new FilterAttributeExtractor();
for (int i = 1; i < parameters.size(); i++) {
Expression expression = parameters.get(i);
if(expression != null) {
extractor.clear();
expression.accept(extractor, null);
if(!extractor.isConstantExpression()) {
staticTable = false;
break;
}