ABAP Select data from SAP table BAPISTUDENT_SCHOOLRESULTST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPISTUDENT_SCHOOLRESULTST 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_SCHOOLRESULTST. 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_SCHOOLRESULTST 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_SCHOOLRESULTST TYPE STANDARD TABLE OF BAPISTUDENT_SCHOOLRESULTST,
      WA_BAPISTUDENT_SCHOOLRESULTST TYPE BAPISTUDENT_SCHOOLRESULTST,
      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_SCHOOLRESULTST> TYPE BAPISTUDENT_SCHOOLRESULTST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPISTUDENT_SCHOOLRESULTST
*  INTO TABLE @DATA(IT_BAPISTUDENT_SCHOOLRESULTST2).
*--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_SCHOOLRESULTST INDEX 1 INTO DATA(WA_BAPISTUDENT_SCHOOLRESULTST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPISTUDENT_SCHOOLRESULTST>-TRANSTYPE = 1.
<BAPISTUDENT_SCHOOLRESULTST>-TRANSTYPE_TXT = 1.
<BAPISTUDENT_SCHOOLRESULTST>-ISSEO = 1.
<BAPISTUDENT_SCHOOLRESULTST>-ISSEO_TXT = 1.
<BAPISTUDENT_SCHOOLRESULTST>-TRSTATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPISTUDENT_SCHOOLRESULTST-TRSTATUS_TXT, sy-vline,
  WA_BAPISTUDENT_SCHOOLRESULTST-RANKING, sy-vline,
  WA_BAPISTUDENT_SCHOOLRESULTST-SIZEOFCLASS, sy-vline,
  WA_BAPISTUDENT_SCHOOLRESULTST-TOTEXTATMCRED, sy-vline,
  WA_BAPISTUDENT_SCHOOLRESULTST-TOTEXTGRDCRED, sy-vline,
  WA_BAPISTUDENT_SCHOOLRESULTST-TOTEXTERNCRED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPISTUDENT_SCHOOLRESULTST 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_SCHOOLRESULTST 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_SCHOOLRESULTST INTO WA_BAPISTUDENT_SCHOOLRESULTST.


*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.

*Conversion exit CUNIT, internal->external for field TOTEXTCREDTYPE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPISTUDENT_SCHOOLRESULTST-TOTEXTCREDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPISTUDENT_SCHOOLRESULTST-TOTEXTCREDTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field TOTINTCREDTYPE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_BAPISTUDENT_SCHOOLRESULTST-TOTINTCREDTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPISTUDENT_SCHOOLRESULTST-TOTINTCREDTYPE.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_BAPISTUDENT_SCHOOLRESULTST_STR, 
TRANSTYPE TYPE STRING,
TRANSTYPE_TXT TYPE STRING,
ISSEO TYPE STRING,
ISSEO_TXT TYPE STRING,
TRSTATUS TYPE STRING,
TRSTATUS_TXT TYPE STRING,
RANKING TYPE STRING,
SIZEOFCLASS TYPE STRING,
TOTEXTATMCRED TYPE STRING,
TOTEXTGRDCRED TYPE STRING,
TOTEXTERNCRED TYPE STRING,
TOTEXTCREDTYPE TYPE STRING,
TOTINTATMCRED TYPE STRING,
TOTINTGRDCRED TYPE STRING,
TOTINTERNCRED TYPE STRING,
TOTINTCREDTYPE TYPE STRING,
TOTCALCGPA TYPE STRING,
TOTCALCGPANORM TYPE STRING,
TOTCALCGPASCALE TYPE STRING,
TOTEXTGPA1 TYPE STRING,
TOTEXTGPA1NORM TYPE STRING,
TOTEXTGPA1SCALE TYPE STRING,
TOTSELFGPA TYPE STRING,
TOTSELFGPANORM TYPE STRING,
TOTSELFGPASCALE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPISTUDENT_SCHOOLRESULTST_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_SCHOOLRESULTST_STR-TRANSTYPE sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TRANSTYPE_TXT sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-ISSEO sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-ISSEO_TXT sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TRSTATUS sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TRSTATUS_TXT sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-RANKING sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-SIZEOFCLASS sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTATMCRED sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTGRDCRED sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTERNCRED sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTCREDTYPE sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTINTATMCRED sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTINTGRDCRED sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTINTERNCRED sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTINTCREDTYPE sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTCALCGPA sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTCALCGPANORM sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTCALCGPASCALE sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTGPA1 sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTGPA1NORM sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTEXTGPA1SCALE sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTSELFGPA sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTSELFGPANORM sy-vline 
WA_BAPISTUDENT_SCHOOLRESULTST_STR-TOTSELFGPASCALE sy-vline      INTO ld_text SEPARATED BY SPACE.

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