presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/UnwrapCastInComparison.java/Visitor/rewriteComparisonExpression
class Visitor:        @Override
        public Expression rewriteComparisonExpression(ComparisonExpression node, Void context, ExpressionTreeRewriter<Void> treeRewriter)
        {
            ComparisonExpression expression = (ComparisonExpression) treeRewriter.defaultRewrite((Expression) node, null);
            return unwrapCast(expression);
        }