AlterQuery  tbl (children 2)
 ExpressionList (children 5)
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration a (children 1)
    DataType Int64
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration b (children 1)
    DataType String
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration c (children 1)
    DataType UInt8
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration d (children 1)
    DataType Float64
  AlterCommand MODIFY_COLUMN (children 1)
   ColumnDeclaration e (children 1)
    DataType UInt32
 Identifier tbl
