ABAP Select data from SAP table CIF_MDCHGS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CIF_MDCHGS
*  INTO TABLE @DATA(IT_CIF_MDCHGS2).
*--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_CIF_MDCHGS INDEX 1 INTO DATA(WA_CIF_MDCHGS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CIF_MDCHGS>-MDTYPE = 1.
<CIF_MDCHGS>-MATNR = 1.
<CIF_MDCHGS>-WERKS = 1.
<CIF_MDCHGS>-VERID = 1.
<CIF_MDCHGS>-PLNTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CIF_MDCHGS-PLNNR, sy-vline,
  WA_CIF_MDCHGS-ALNAL, sy-vline,
  WA_CIF_MDCHGS-STLAL, sy-vline,
  WA_CIF_MDCHGS-STLAN, sy-vline,
  WA_CIF_MDCHGS-VBELN, sy-vline,
  WA_CIF_MDCHGS-POSNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CIF_MDCHGS 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_CIF_MDCHGS 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_CIF_MDCHGS INTO WA_CIF_MDCHGS.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_CIF_MDCHGS-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CIF_MDCHGS-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CIF_MDCHGS-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CIF_MDCHGS-PLNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ALNAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CIF_MDCHGS-ALNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CIF_MDCHGS-ALNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field STLAL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CIF_MDCHGS-STLAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CIF_MDCHGS-STLAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CIF_MDCHGS-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CIF_MDCHGS-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_CIF_MDCHGS-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CIF_MDCHGS-PSPNR.
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_CIF_MDCHGS_STR, 
MDTYPE TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
VERID TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
ALNAL TYPE STRING,
STLAL TYPE STRING,
STLAN TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
PSPNR TYPE STRING,
AEDAT TYPE STRING,
CHGTIME TYPE STRING,
CHANGE TYPE STRING,
PROCESS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CIF_MDCHGS_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_CIF_MDCHGS_STR-MDTYPE sy-vline 
WA_CIF_MDCHGS_STR-MATNR sy-vline 
WA_CIF_MDCHGS_STR-WERKS sy-vline 
WA_CIF_MDCHGS_STR-VERID sy-vline 
WA_CIF_MDCHGS_STR-PLNTY sy-vline 
WA_CIF_MDCHGS_STR-PLNNR sy-vline 
WA_CIF_MDCHGS_STR-ALNAL sy-vline 
WA_CIF_MDCHGS_STR-STLAL sy-vline 
WA_CIF_MDCHGS_STR-STLAN sy-vline 
WA_CIF_MDCHGS_STR-VBELN sy-vline 
WA_CIF_MDCHGS_STR-POSNR sy-vline 
WA_CIF_MDCHGS_STR-PSPNR sy-vline 
WA_CIF_MDCHGS_STR-AEDAT sy-vline 
WA_CIF_MDCHGS_STR-CHGTIME sy-vline 
WA_CIF_MDCHGS_STR-CHANGE sy-vline 
WA_CIF_MDCHGS_STR-PROCESS sy-vline      INTO ld_text SEPARATED BY SPACE.

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