CreateQuery nested_test (children 3)
 Identifier nested_test
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration s (children 1)
    DataType String
   ColumnDeclaration nest (children 1)
    DataType Nested (children 1)
     ExpressionList (children 2)
      NameTypePair x (children 1)
       DataType UInt64
      NameTypePair y (children 1)
       DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Identifier s
