ABAP Select data from SAP table BAPISTUDENT_FEEDATAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPISTUDENT_FEEDATAT table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to BAPISTUDENT_FEEDATAT. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the BAPISTUDENT_FEEDATAT table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_BAPISTUDENT_FEEDATAT TYPE STANDARD TABLE OF BAPISTUDENT_FEEDATAT,
      WA_BAPISTUDENT_FEEDATAT TYPE BAPISTUDENT_FEEDATAT,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <BAPISTUDENT_FEEDATAT> TYPE BAPISTUDENT_FEEDATAT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPISTUDENT_FEEDATAT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPISTUDENT_FEEDATAT
  INTO TABLE IT_BAPISTUDENT_FEEDATAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPISTUDENT_FEEDATAT
*  INTO TABLE @DATA(IT_BAPISTUDENT_FEEDATAT2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_BAPISTUDENT_FEEDATAT INDEX 1 INTO DATA(WA_BAPISTUDENT_FEEDATAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPISTUDENT_FEEDATAT ASSIGNING <BAPISTUDENT_FEEDATAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPISTUDENT_FEEDATAT>-STUDENT_FEE_CATEG = 1.
<BAPISTUDENT_FEEDATAT>-STUDENT_FEE_CATEG_TXT = 1.
<BAPISTUDENT_FEEDATAT>-BENEFIT_CATEG = 1.
<BAPISTUDENT_FEEDATAT>-BENEFIT_CATEG_TXT = 1.
<BAPISTUDENT_FEEDATAT>-PERS_DISCOUNT1 = 1.

ENDLOOP.

LOOP AT IT_BAPISTUDENT_FEEDATAT INTO WA_BAPISTUDENT_FEEDATAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPISTUDENT_FEEDATAT-PERS_DISCOUNT1_TXT, sy-vline,
  WA_BAPISTUDENT_FEEDATAT-PERS_DISCOUNT2, sy-vline,
  WA_BAPISTUDENT_FEEDATAT-PERS_DISCOUNT2_TXT, sy-vline,
  WA_BAPISTUDENT_FEEDATAT-PERS_DISCOUNT3, sy-vline,
  WA_BAPISTUDENT_FEEDATAT-PERS_DISCOUNT3_TXT, sy-vline,
  WA_BAPISTUDENT_FEEDATAT-PERS_DISCOUNT4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPISTUDENT_FEEDATAT you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_BAPISTUDENT_FEEDATAT TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_BAPISTUDENT_FEEDATAT INTO WA_BAPISTUDENT_FEEDATAT.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_BAPISTUDENT_FEEDATAT_STR, 
STUDENT_FEE_CATEG TYPE STRING,
STUDENT_FEE_CATEG_TXT TYPE STRING,
BENEFIT_CATEG TYPE STRING,
BENEFIT_CATEG_TXT TYPE STRING,
PERS_DISCOUNT1 TYPE STRING,
PERS_DISCOUNT1_TXT TYPE STRING,
PERS_DISCOUNT2 TYPE STRING,
PERS_DISCOUNT2_TXT TYPE STRING,
PERS_DISCOUNT3 TYPE STRING,
PERS_DISCOUNT3_TXT TYPE STRING,
PERS_DISCOUNT4 TYPE STRING,
PERS_DISCOUNT4_TXT TYPE STRING,
PERS_DISCOUNT5 TYPE STRING,
PERS_DISCOUNT5_TXT TYPE STRING,
PERS_DISCOUNT6 TYPE STRING,
PERS_DISCOUNT6_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPISTUDENT_FEEDATAT_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_BAPISTUDENT_FEEDATAT_STR-STUDENT_FEE_CATEG sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-STUDENT_FEE_CATEG_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-BENEFIT_CATEG sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-BENEFIT_CATEG_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT1 sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT1_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT2 sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT2_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT3 sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT3_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT4 sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT4_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT5 sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT5_TXT sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT6 sy-vline 
WA_BAPISTUDENT_FEEDATAT_STR-PERS_DISCOUNT6_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.