AlterQuery  alter_test (children 2)
 ExpressionList (children 1)
  AlterCommand ADD_COLUMN (children 2)
   ColumnDeclaration AddedNested1.C (children 1)
    DataType Array (children 1)
     ExpressionList (children 1)
      DataType String
   Identifier AddedNested1.B
 Identifier alter_test