Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 4)
     Identifier co
     Identifier co2
     Identifier co3
     Identifier num
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       Subquery (children 1)
        SelectWithUnionQuery (children 1)
         ExpressionList (children 1)
          SelectQuery (children 3)
           ExpressionList (children 4)
            Identifier co
            Identifier co2
            Identifier co3
            Function count (alias num) (children 1)
             ExpressionList
           TablesInSelectQuery (children 1)
            TablesInSelectQueryElement (children 1)
             TableExpression (children 1)
              Subquery (children 1)
               SelectWithUnionQuery (children 1)
                ExpressionList (children 1)
                 SelectQuery (children 1)
                  ExpressionList (children 3)
                   Function plus (alias co) (children 1)
                    ExpressionList (children 2)
                     Identifier dummy
                     Literal UInt64_1
                   Function plus (alias co2) (children 1)
                    ExpressionList (children 2)
                     Identifier dummy
                     Literal UInt64_2
                   Function plus (alias co3) (children 1)
                    ExpressionList (children 2)
                     Identifier dummy
                     Literal UInt64_3
           ExpressionList (children 3)
            Identifier co
            Identifier co2
            Identifier co3
    Function and (children 1)
     ExpressionList (children 2)
      Function notEquals (children 1)
       ExpressionList (children 2)
        Identifier co
        Literal UInt64_0
      Function notEquals (children 1)
       ExpressionList (children 2)
        Identifier co2
        Literal UInt64_2