ABAP Select data from SAP table CMPERSIDXF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CMPERSIDXF
*  INTO TABLE @DATA(IT_CMPERSIDXF2).
*--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_CMPERSIDXF INDEX 1 INTO DATA(WA_CMPERSIDXF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CMPERSIDXF>-SCRNID = 1.
<CMPERSIDXF>-FIELDNAME = 1.
<CMPERSIDXF>-APPLID = 1.
<CMPERSIDXF>-FIELDTYPE = 1.
<CMPERSIDXF>-LISTFLAG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CMPERSIDXF-TECHFLAG, sy-vline,
  WA_CMPERSIDXF-DISPFLAG, sy-vline,
  WA_CMPERSIDXF-SCRFLD, sy-vline,
  WA_CMPERSIDXF-SCRFLDTO, sy-vline,
  WA_CMPERSIDXF-SCRFLDID, sy-vline,
  WA_CMPERSIDXF-TABSID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CMPERSIDXF 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_CMPERSIDXF 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_CMPERSIDXF INTO WA_CMPERSIDXF.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_CMPERSIDXF-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CMPERSIDXF-DATATYPE.
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_CMPERSIDXF_STR, 
SCRNID TYPE STRING,
FIELDNAME TYPE STRING,
APPLID TYPE STRING,
FIELDTYPE TYPE STRING,
LISTFLAG TYPE STRING,
TECHFLAG TYPE STRING,
DISPFLAG TYPE STRING,
SCRFLD TYPE STRING,
SCRFLDTO TYPE STRING,
SCRFLDID TYPE STRING,
TABSID TYPE STRING,
ZEROFLAG TYPE STRING,
REFTAB TYPE STRING,
REFFLD TYPE STRING,
MEMID TYPE STRING,
MEMID_TO TYPE STRING,
NAVIGFLG TYPE STRING,
NAVI_EXIT TYPE STRING,
FIELD_TEXT TYPE STRING,
DATATYPE TYPE STRING,
INTTYPE TYPE STRING,
DDLEN TYPE STRING,
INTLEN TYPE STRING,
CONV_EXIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CMPERSIDXF_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_CMPERSIDXF_STR-SCRNID sy-vline 
WA_CMPERSIDXF_STR-FIELDNAME sy-vline 
WA_CMPERSIDXF_STR-APPLID sy-vline 
WA_CMPERSIDXF_STR-FIELDTYPE sy-vline 
WA_CMPERSIDXF_STR-LISTFLAG sy-vline 
WA_CMPERSIDXF_STR-TECHFLAG sy-vline 
WA_CMPERSIDXF_STR-DISPFLAG sy-vline 
WA_CMPERSIDXF_STR-SCRFLD sy-vline 
WA_CMPERSIDXF_STR-SCRFLDTO sy-vline 
WA_CMPERSIDXF_STR-SCRFLDID sy-vline 
WA_CMPERSIDXF_STR-TABSID sy-vline 
WA_CMPERSIDXF_STR-ZEROFLAG sy-vline 
WA_CMPERSIDXF_STR-REFTAB sy-vline 
WA_CMPERSIDXF_STR-REFFLD sy-vline 
WA_CMPERSIDXF_STR-MEMID sy-vline 
WA_CMPERSIDXF_STR-MEMID_TO sy-vline 
WA_CMPERSIDXF_STR-NAVIGFLG sy-vline 
WA_CMPERSIDXF_STR-NAVI_EXIT sy-vline 
WA_CMPERSIDXF_STR-FIELD_TEXT sy-vline 
WA_CMPERSIDXF_STR-DATATYPE sy-vline 
WA_CMPERSIDXF_STR-INTTYPE sy-vline 
WA_CMPERSIDXF_STR-DDLEN sy-vline 
WA_CMPERSIDXF_STR-INTLEN sy-vline 
WA_CMPERSIDXF_STR-CONV_EXIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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