Method isCountStar

core/src/main/java/org/apache/calcite/sql/SqlCall.java:230–244

Returns whether it is the function COUNT( ). @return true if function call to COUNT( )

()

   * @return true if function call to COUNT(*)
   */
  public boolean isCountStar() {
    SqlOperator sqlOperator = getOperator();
    if (sqlOperator.getName().equals("COUNT")
        && operandCount() == 1) {
      final SqlNode parm = operand(0);
      if (parm instanceof SqlIdentifier) {
        SqlIdentifier id = (SqlIdentifier) parm;
        if (id.isStar() && id.names.size() == 1) {
          return true;
        }
      }
    }

    return false;
  }

  @Pure
  public @Nullable SqlLiteral getFunctionQuantifier() {