ABAP Select data from SAP table IOCSEL into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP IOCSEL 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 IOCSEL. 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 IOCSEL 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_IOCSEL TYPE STANDARD TABLE OF IOCSEL,
      WA_IOCSEL TYPE IOCSEL,
      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: <IOCSEL> TYPE IOCSEL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IOCSEL
*  INTO TABLE @DATA(IT_IOCSEL2).
*--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_IOCSEL INDEX 1 INTO DATA(WA_IOCSEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IOCSEL>-ECKST = 1.
<IOCSEL>-ECKEN = 1.
<IOCSEL>-TERST = 1.
<IOCSEL>-TEREN = 1.
<IOCSEL>-TERFR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IOCSEL-ISTST, sy-vline,
  WA_IOCSEL-ISTEN, sy-vline,
  WA_IOCSEL-ISTFR, sy-vline,
  WA_IOCSEL-PERTR, sy-vline,
  WA_IOCSEL-ZEINH, sy-vline,
  WA_IOCSEL-EINHEIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IOCSEL 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_IOCSEL 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_IOCSEL INTO WA_IOCSEL.


*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 ZEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IOCSEL-ZEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IOCSEL-ZEINH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EINHEIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IOCSEL-EINHEIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IOCSEL-EINHEIT.
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_IOCSEL_STR, 
ECKST TYPE STRING,
ECKEN TYPE STRING,
TERST TYPE STRING,
TEREN TYPE STRING,
TERFR TYPE STRING,
ISTST TYPE STRING,
ISTEN TYPE STRING,
ISTFR TYPE STRING,
PERTR TYPE STRING,
ZEINH TYPE STRING,
EINHEIT TYPE STRING,
FLG_REWORK TYPE STRING,
FLG_MSTUF TYPE STRING,
FLG_LOEKZ TYPE STRING,
SEL_TYP TYPE STRING,
AV_CLEAR TYPE STRING,
AV_CHECK TYPE STRING,
AV_CHECK_DEF TYPE STRING,
AV_CHECK_ATP TYPE STRING,
AV_CHECK_VPL TYPE STRING,
AV_FIX_PL TYPE STRING,
AV_NO_MONT TYPE STRING,
AV_KAPFX TYPE STRING,
ORDNUM TYPE STRING,
FLG_NO_ALT_SEQ TYPE STRING,
FLG_NO_REL TYPE STRING,
FLG_COIS_FILTER TYPE STRING,
FLG_COIS_PRESUC TYPE STRING,
FLG_COIS_PRETAB TYPE STRING,
FLG_COIS_AUFFX TYPE STRING,
FLG_COIS_FULLAV TYPE STRING,
FLG_COIS_PARTAV TYPE STRING,
FLG_COIS_NOCONF TYPE STRING,
FLG_COIS_NCHECK TYPE STRING,
FIXOF TYPE STRING,
TIME_FENCE TYPE STRING,
FTS_FLG_FUZZY TYPE STRING,
FTS_KEYWORDS TYPE STRING,
FLG_WIPB_DEVIATION TYPE STRING,
FLG_COIS_OPENGI TYPE STRING,
FLG_PC_DEVIATION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IOCSEL_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_IOCSEL_STR-ECKST sy-vline 
WA_IOCSEL_STR-ECKEN sy-vline 
WA_IOCSEL_STR-TERST sy-vline 
WA_IOCSEL_STR-TEREN sy-vline 
WA_IOCSEL_STR-TERFR sy-vline 
WA_IOCSEL_STR-ISTST sy-vline 
WA_IOCSEL_STR-ISTEN sy-vline 
WA_IOCSEL_STR-ISTFR sy-vline 
WA_IOCSEL_STR-PERTR sy-vline 
WA_IOCSEL_STR-ZEINH sy-vline 
WA_IOCSEL_STR-EINHEIT sy-vline 
WA_IOCSEL_STR-FLG_REWORK sy-vline 
WA_IOCSEL_STR-FLG_MSTUF sy-vline 
WA_IOCSEL_STR-FLG_LOEKZ sy-vline 
WA_IOCSEL_STR-SEL_TYP sy-vline 
WA_IOCSEL_STR-AV_CLEAR sy-vline 
WA_IOCSEL_STR-AV_CHECK sy-vline 
WA_IOCSEL_STR-AV_CHECK_DEF sy-vline 
WA_IOCSEL_STR-AV_CHECK_ATP sy-vline 
WA_IOCSEL_STR-AV_CHECK_VPL sy-vline 
WA_IOCSEL_STR-AV_FIX_PL sy-vline 
WA_IOCSEL_STR-AV_NO_MONT sy-vline 
WA_IOCSEL_STR-AV_KAPFX sy-vline 
WA_IOCSEL_STR-ORDNUM sy-vline 
WA_IOCSEL_STR-FLG_NO_ALT_SEQ sy-vline 
WA_IOCSEL_STR-FLG_NO_REL sy-vline 
WA_IOCSEL_STR-FLG_COIS_FILTER sy-vline 
WA_IOCSEL_STR-FLG_COIS_PRESUC sy-vline 
WA_IOCSEL_STR-FLG_COIS_PRETAB sy-vline 
WA_IOCSEL_STR-FLG_COIS_AUFFX sy-vline 
WA_IOCSEL_STR-FLG_COIS_FULLAV sy-vline 
WA_IOCSEL_STR-FLG_COIS_PARTAV sy-vline 
WA_IOCSEL_STR-FLG_COIS_NOCONF sy-vline 
WA_IOCSEL_STR-FLG_COIS_NCHECK sy-vline 
WA_IOCSEL_STR-FIXOF sy-vline 
WA_IOCSEL_STR-TIME_FENCE sy-vline 
WA_IOCSEL_STR-FTS_FLG_FUZZY sy-vline 
WA_IOCSEL_STR-FTS_KEYWORDS sy-vline 
WA_IOCSEL_STR-FLG_WIPB_DEVIATION sy-vline 
WA_IOCSEL_STR-FLG_COIS_OPENGI sy-vline 
WA_IOCSEL_STR-FLG_PC_DEVIATION sy-vline      INTO ld_text SEPARATED BY SPACE.

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