CreateQuery test_alter_mixed (children 3)
 Identifier test_alter_mixed
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration a (children 1)
    DataType Int32
   ColumnDeclaration b (children 1)
    DataType String
   ColumnDeclaration c (children 1)
    DataType Float64
 Storage definition (children 1)
  Function Memory
