SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function replaceRegexpAll (children 1)
     ExpressionList (children 3)
      Identifier explain
      Literal \'__table1\\\\.|_UInt8\'
      Literal \'\'
   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\'
               Literal \'actions = 1\'
               Subquery (children 1)
                SelectWithUnionQuery (children 1)
                 ExpressionList (children 1)
                  SelectQuery (children 3)
                   ExpressionList (children 1)
                    Function count (children 1)
                     ExpressionList
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier t_02848_mt1
                   Function and (children 1)
                    ExpressionList (children 2)
                     Function equals (children 1)
                      ExpressionList (children 2)
                       Identifier k
                       Literal UInt64_3
                     Function notEmpty (children 1)
                      ExpressionList (children 1)
                       Identifier v
   Function or (children 1)
    ExpressionList (children 2)
     Function like (children 1)
      ExpressionList (children 2)
       Identifier explain
       Literal \'%Prewhere filter%\'
     Function like (children 1)
      ExpressionList (children 2)
       Identifier explain
       Literal \'%Filter%\'
