ABAP Select data from SAP table /SAPAPO/AHT_EVENTPARA_STR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPAPO/AHT_EVENTPARA_STR 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 /SAPAPO/AHT_EVENTPARA_STR. 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 /SAPAPO/AHT_EVENTPARA_STR 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_/SAPAPO/AHT_EVENTPARA_STR TYPE STANDARD TABLE OF /SAPAPO/AHT_EVENTPARA_STR,
      WA_/SAPAPO/AHT_EVENTPARA_STR TYPE /SAPAPO/AHT_EVENTPARA_STR,
      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: </SAPAPO/AHT_EVENTPARA_STR> TYPE /SAPAPO/AHT_EVENTPARA_STR.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPAPO/AHT_EVENTPARA_STR
  INTO TABLE IT_/SAPAPO/AHT_EVENTPARA_STR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPAPO/AHT_EVENTPARA_STR
*  INTO TABLE @DATA(IT_/SAPAPO/AHT_EVENTPARA_STR2).
*--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_/SAPAPO/AHT_EVENTPARA_STR INDEX 1 INTO DATA(WA_/SAPAPO/AHT_EVENTPARA_STR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPAPO/AHT_EVENTPARA_STR ASSIGNING </SAPAPO/AHT_EVENTPARA_STR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPAPO/AHT_EVENTPARA_STR>-EVTID = 1.
</SAPAPO/AHT_EVENTPARA_STR>-SUBCNT = 1.
</SAPAPO/AHT_EVENTPARA_STR>-TPOINT = 1.
</SAPAPO/AHT_EVENTPARA_STR>-ORDNO = 1.
</SAPAPO/AHT_EVENTPARA_STR>-EXTID = 1.

ENDLOOP.

LOOP AT IT_/SAPAPO/AHT_EVENTPARA_STR INTO WA_/SAPAPO/AHT_EVENTPARA_STR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPAPO/AHT_EVENTPARA_STR-ACTION, sy-vline,
  WA_/SAPAPO/AHT_EVENTPARA_STR-REF2NET, sy-vline,
  WA_/SAPAPO/AHT_EVENTPARA_STR-EXTTS, sy-vline,
  WA_/SAPAPO/AHT_EVENTPARA_STR-EXTTZ, sy-vline,
  WA_/SAPAPO/AHT_EVENTPARA_STR-EXTUSER, sy-vline,
  WA_/SAPAPO/AHT_EVENTPARA_STR-QUANT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPAPO/AHT_EVENTPARA_STR 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_/SAPAPO/AHT_EVENTPARA_STR 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_/SAPAPO/AHT_EVENTPARA_STR INTO WA_/SAPAPO/AHT_EVENTPARA_STR.


*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 MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SAPAPO/AHT_EVENTPARA_STR-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SAPAPO/AHT_EVENTPARA_STR-MEINS.
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_/SAPAPO/AHT_EVENTPARA_STR_STR, 
EVTID TYPE STRING,
SUBCNT TYPE STRING,
TPOINT TYPE STRING,
ORDNO TYPE STRING,
EXTID TYPE STRING,
ACTION TYPE STRING,
REF2NET TYPE STRING,
EXTTS TYPE STRING,
EXTTZ TYPE STRING,
EXTUSER TYPE STRING,
QUANT TYPE STRING,
MEINS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPAPO/AHT_EVENTPARA_STR_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_/SAPAPO/AHT_EVENTPARA_STR_STR-EVTID sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-SUBCNT sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-TPOINT sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-ORDNO sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-EXTID sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-ACTION sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-REF2NET sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-EXTTS sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-EXTTZ sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-EXTUSER sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-QUANT sy-vline 
WA_/SAPAPO/AHT_EVENTPARA_STR_STR-MEINS sy-vline      INTO ld_text SEPARATED BY SPACE.

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