Unit 1 Data Types



11.  


Advantage of User defined types: 

  • Maintain definition centrally
  • Local types available within the program
  • Global types available within the system

12. Data Objects


  • Text symbol is used to show messages.
  • Adv of Text Symbol, translation can be maintained.

 
13. Data Formats
  • Internal and External Format of Data
  • Output Length of Data Types
15 Structure
  • To define a type we can refer to a data object/data type or a database table definition in se11 .
  • TYPES: BEGIN OF ty_makt, ...., END OF ty_makt.
There are three types of ABAP structures:
  •  Flat structures: Components are made of individual fields that refer to elementary types.
  •  Nested structures :If at least one component of a structure refers to another structure, it’s a nested structure.
  •  Deep structures:  References at least one table type (a type that defines an internal table).
16 Internal Table: Can store 2 GB of data, Basis would generally restrict it to 500 MB. 
  • Standard Table
  • Sorted Table
  • Hashed Table

17    

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