SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function concat (children 1)
     ExpressionList (children 2)
      Literal \'Reading steps: \'
      Function count (children 1)
       ExpressionList
   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 \'\'
               Subquery (children 1)
                SelectWithUnionQuery (children 1)
                 ExpressionList (children 1)
                  SelectQuery (children 5)
                   ExpressionList (children 1)
                    Asterisk
                   TablesInSelectQuery (children 1)
                    TablesInSelectQueryElement (children 1)
                     TableExpression (children 1)
                      TableIdentifier tt1
                   Function equals (children 1)
                    ExpressionList (children 2)
                     Identifier v
                     Literal \'1001\'
                   ExpressionList (children 1)
                    OrderByElement (children 1)
                     Identifier v
                   Literal UInt64_10
   Function ilike (children 1)
    ExpressionList (children 2)
     Function trimLeft (children 1)
      ExpressionList (children 1)
       Identifier explain
     Literal \'ReadFromMergeTree%\'
