CreateQuery nested (children 3)
 Identifier nested
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt32
   ColumnDeclaration col1 (children 1)
    DataType Nested (children 1)
     ExpressionList (children 2)
      NameTypePair a (children 1)
       DataType UInt32
      NameTypePair n (children 1)
       DataType Nested (children 1)
        ExpressionList (children 2)
         NameTypePair s (children 1)
          DataType String
         NameTypePair b (children 1)
          DataType UInt32
 Storage definition (children 3)
  Function MergeTree
  Identifier id
  Set
