CreateQuery foo (children 3)
 Identifier foo
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration server_date (children 1)
    DataType Date
   ColumnDeclaration server_time (children 1)
    DataType Datetime (children 1)
     ExpressionList (children 1)
      Literal \'Asia/Istanbul\'
   ColumnDeclaration dimension_1 (children 1)
    DataType String
 Storage definition (children 3)
  Function MergeTree (children 1)
   ExpressionList
  Function toYYYYMM (children 1)
   ExpressionList (children 1)
    Identifier server_date
  Identifier server_date
