SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function countIf (children 1)
     ExpressionList (children 1)
      Function or (children 1)
       ExpressionList (children 2)
        Function like (children 1)
         ExpressionList (children 2)
          Identifier explain
          Literal \'%COMMA%\'
        Function like (children 1)
         ExpressionList (children 2)
          Identifier explain
          Literal \'%CROSS%\'
    Function countIf (children 1)
     ExpressionList (children 1)
      Function like (children 1)
       ExpressionList (children 2)
        Identifier explain
        Literal \'%INNER%\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       SelectWithUnionQuery (children 1)
        ExpressionList (children 1)
         SelectQuery (children 2)
          ExpressionList (children 1)
           Asterisk
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function viewExplain (children 1)
              ExpressionList (children 3)
               Literal \'EXPLAIN QUERY TREE\'
               Literal \'\'
               Subquery (children 1)
                SelectWithUnionQuery (children 1)
                 ExpressionList (children 1)
                  SelectQuery (children 3)
                   ExpressionList (children 1)
                    Identifier t1.a
                   TablesInSelectQuery (children 4)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier t1
                    TablesInSelectQueryElement (children 2)
                     TableExpression (children 1)
                      TableIdentifier t2
                     TableJoin
                    TablesInSelectQueryElement (children 2)
                     TableExpression (children 1)
                      TableIdentifier t3
                     TableJoin
                    TablesInSelectQueryElement (children 2)
                     TableExpression (children 1)
                      TableIdentifier t4
                     TableJoin
                   Function and (children 1)
                    ExpressionList (children 3)
                     Function equals (children 1)
                      ExpressionList (children 2)
                       Identifier t1.a
                       Identifier t2.a
                     Function equals (children 1)
                      ExpressionList (children 2)
                       Identifier t2.a
                       Identifier t3.a
                     Function equals (children 1)
                      ExpressionList (children 2)
                       Identifier t3.a
                       Identifier t4.a
   Set
