ABAP Select data from SAP table CLIST_CUSTOMIZING_IE4N into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CLIST_CUSTOMIZING_IE4N 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 CLIST_CUSTOMIZING_IE4N. 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 CLIST_CUSTOMIZING_IE4N 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_CLIST_CUSTOMIZING_IE4N TYPE STANDARD TABLE OF CLIST_CUSTOMIZING_IE4N,
      WA_CLIST_CUSTOMIZING_IE4N TYPE CLIST_CUSTOMIZING_IE4N,
      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: <CLIST_CUSTOMIZING_IE4N> TYPE CLIST_CUSTOMIZING_IE4N.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CLIST_CUSTOMIZING_IE4N.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CLIST_CUSTOMIZING_IE4N
  INTO TABLE IT_CLIST_CUSTOMIZING_IE4N.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CLIST_CUSTOMIZING_IE4N
*  INTO TABLE @DATA(IT_CLIST_CUSTOMIZING_IE4N2).
*--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_CLIST_CUSTOMIZING_IE4N INDEX 1 INTO DATA(WA_CLIST_CUSTOMIZING_IE4N2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CLIST_CUSTOMIZING_IE4N ASSIGNING <CLIST_CUSTOMIZING_IE4N>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CLIST_CUSTOMIZING_IE4N>-MVMTTYPE_I = 1.
<CLIST_CUSTOMIZING_IE4N>-MVMTTYPE_R = 1.
<CLIST_CUSTOMIZING_IE4N>-SOBKZ_I = 1.
<CLIST_CUSTOMIZING_IE4N>-SOBKZ_R = 1.
<CLIST_CUSTOMIZING_IE4N>-MPN_UPD_ON = 1.

ENDLOOP.

LOOP AT IT_CLIST_CUSTOMIZING_IE4N INTO WA_CLIST_CUSTOMIZING_IE4N.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CLIST_CUSTOMIZING_IE4N-BTC_UPD_ON, sy-vline,
  WA_CLIST_CUSTOMIZING_IE4N-START_MODE, sy-vline,
  WA_CLIST_CUSTOMIZING_IE4N-PLANT_I, sy-vline,
  WA_CLIST_CUSTOMIZING_IE4N-LGORT_I, sy-vline,
  WA_CLIST_CUSTOMIZING_IE4N-FOLLOW_MODE_I, sy-vline,
  WA_CLIST_CUSTOMIZING_IE4N-PLANT_R, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CLIST_CUSTOMIZING_IE4N 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_CLIST_CUSTOMIZING_IE4N 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_CLIST_CUSTOMIZING_IE4N INTO WA_CLIST_CUSTOMIZING_IE4N.


*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_CLIST_CUSTOMIZING_IE4N_STR, 
MVMTTYPE_I TYPE STRING,
MVMTTYPE_R TYPE STRING,
SOBKZ_I TYPE STRING,
SOBKZ_R TYPE STRING,
MPN_UPD_ON TYPE STRING,
BTC_UPD_ON TYPE STRING,
START_MODE TYPE STRING,
PLANT_I TYPE STRING,
LGORT_I TYPE STRING,
FOLLOW_MODE_I TYPE STRING,
PLANT_R TYPE STRING,
LGORT_R TYPE STRING,
FOLLOW_MODE_R TYPE STRING,
NOTIFTYPE_I TYPE STRING,
NOTIFTYPE_R TYPE STRING,
DAMAGE_CATALOGUE TYPE STRING,
DAMAGE_CGROUP TYPE STRING,
DAMAGE_CODE_S TYPE STRING,
DAMAGE_CODE_U TYPE STRING,
CAUSE_CATALOGUE TYPE STRING,
CAUSE_CGROUP TYPE STRING,
CAUSE_CODE_F TYPE STRING,
CAUSE_CODE_N TYPE STRING,
CAUSE_CODE_X TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CLIST_CUSTOMIZING_IE4N_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_CLIST_CUSTOMIZING_IE4N_STR-MVMTTYPE_I sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-MVMTTYPE_R sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-SOBKZ_I sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-SOBKZ_R sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-MPN_UPD_ON sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-BTC_UPD_ON sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-START_MODE sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-PLANT_I sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-LGORT_I sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-FOLLOW_MODE_I sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-PLANT_R sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-LGORT_R sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-FOLLOW_MODE_R sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-NOTIFTYPE_I sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-NOTIFTYPE_R sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-DAMAGE_CATALOGUE sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-DAMAGE_CGROUP sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-DAMAGE_CODE_S sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-DAMAGE_CODE_U sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-CAUSE_CATALOGUE sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-CAUSE_CGROUP sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-CAUSE_CODE_F sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-CAUSE_CODE_N sy-vline 
WA_CLIST_CUSTOMIZING_IE4N_STR-CAUSE_CODE_X sy-vline      INTO ld_text SEPARATED BY SPACE.

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