ABAP Select data from SAP table MMBSI_EKAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MMBSI_EKAB
*  INTO TABLE @DATA(IT_MMBSI_EKAB2).
*--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_MMBSI_EKAB INDEX 1 INTO DATA(WA_MMBSI_EKAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MMBSI_EKAB>-SRM_CONTRACT_ID = 1.
<MMBSI_EKAB>-SRM_CONTRACT_ITM = 1.
<MMBSI_EKAB>-MANDT = 1.
<MMBSI_EKAB>-KONNR = 1.
<MMBSI_EKAB>-KTPNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MMBSI_EKAB-EBELN, sy-vline,
  WA_MMBSI_EKAB-EBELP, sy-vline,
  WA_MMBSI_EKAB-BEDAT, sy-vline,
  WA_MMBSI_EKAB-MENGE, sy-vline,
  WA_MMBSI_EKAB-MEINS, sy-vline,
  WA_MMBSI_EKAB-NETWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MMBSI_EKAB 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_MMBSI_EKAB 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_MMBSI_EKAB INTO WA_MMBSI_EKAB.


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

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

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MMBSI_EKAB-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMBSI_EKAB-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MMBSI_EKAB-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMBSI_EKAB-WKURS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MMBSI_EKAB-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MMBSI_EKAB-LOGSY.
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_MMBSI_EKAB_STR, 
SRM_CONTRACT_ID TYPE STRING,
SRM_CONTRACT_ITM TYPE STRING,
MANDT TYPE STRING,
KONNR TYPE STRING,
KTPNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
BEDAT TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
NETWR TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,
LOEKZ TYPE STRING,
EBELD TYPE STRING,
LOGSY TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
EKORG TYPE STRING,
AEDAT TYPE STRING,
BSTYP TYPE STRING,
MEMORYTYPE TYPE STRING,
_DATAAGING TYPE STRING,
PSTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MMBSI_EKAB_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_MMBSI_EKAB_STR-SRM_CONTRACT_ID sy-vline 
WA_MMBSI_EKAB_STR-SRM_CONTRACT_ITM sy-vline 
WA_MMBSI_EKAB_STR-MANDT sy-vline 
WA_MMBSI_EKAB_STR-KONNR sy-vline 
WA_MMBSI_EKAB_STR-KTPNR sy-vline 
WA_MMBSI_EKAB_STR-EBELN sy-vline 
WA_MMBSI_EKAB_STR-EBELP sy-vline 
WA_MMBSI_EKAB_STR-BEDAT sy-vline 
WA_MMBSI_EKAB_STR-MENGE sy-vline 
WA_MMBSI_EKAB_STR-MEINS sy-vline 
WA_MMBSI_EKAB_STR-NETWR sy-vline 
WA_MMBSI_EKAB_STR-WAERS sy-vline 
WA_MMBSI_EKAB_STR-WKURS sy-vline 
WA_MMBSI_EKAB_STR-LOEKZ sy-vline 
WA_MMBSI_EKAB_STR-EBELD sy-vline 
WA_MMBSI_EKAB_STR-LOGSY sy-vline 
WA_MMBSI_EKAB_STR-BUKRS sy-vline 
WA_MMBSI_EKAB_STR-WERKS sy-vline 
WA_MMBSI_EKAB_STR-EKORG sy-vline 
WA_MMBSI_EKAB_STR-AEDAT sy-vline 
WA_MMBSI_EKAB_STR-BSTYP sy-vline 
WA_MMBSI_EKAB_STR-MEMORYTYPE sy-vline 
WA_MMBSI_EKAB_STR-_DATAAGING sy-vline 
WA_MMBSI_EKAB_STR-PSTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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