import net.sf.jsqlparser.expression.BinaryExpression;
import net.sf.jsqlparser.expression.Expression;
import net.sf.jsqlparser.parser.AbstractJSqlParser.Dialect;
import net.sf.jsqlparser.parser.CCJSqlParserUtil;
import net.sf.jsqlparser.statement.select.Select;
public class Repro {
  static String shape(Expression e) {
    if (e instanceof BinaryExpression b)
      return "(" + shape(b.getLeftExpression()) + " " + e.getClass().getSimpleName()
          + " " + shape(b.getRightExpression()) + ")";
    return e.toString();
  }
  public static void main(String[] args) throws Exception {
    for (String x : new String[]{"1 | 2 & 4", "3 & 1 << 2"}) {
      Select s = (Select) CCJSqlParserUtil.parse("SELECT " + x + " AS x",
          p -> p.withDialect(Dialect.MYSQL));
      System.out.println(x + " => " + shape(s.getPlainSelect().getSelectItem(0).getExpression()));
    }
  }
}