presto-main/src/main/java/io/prestosql/sql/relational/SqlToRowExpressionTranslator.java/SqlToRowExpressionTranslator/visitNotExpression
class SqlToRowExpressionTranslator:        @Override
        protected RowExpression visitNotExpression(NotExpression node, Void context)
        {
            return notExpression(process(node.getValue(), context));
        }