ABAP Select data from SAP table MDBA into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MDBA 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 MDBA. 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 MDBA 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_MDBA TYPE STANDARD TABLE OF MDBA,
      WA_MDBA TYPE MDBA,
      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: <MDBA> TYPE MDBA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDBA
*  INTO TABLE @DATA(IT_MDBA2).
*--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_MDBA INDEX 1 INTO DATA(WA_MDBA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDBA>-BANNR = 1.
<MDBA>-BANPS = 1.
<MDBA>-BSART = 1.
<MDBA>-PSTYP = 1.
<MDBA>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDBA-WERKS, sy-vline,
  WA_MDBA-LGORT, sy-vline,
  WA_MDBA-MENGE, sy-vline,
  WA_MDBA-MEINS, sy-vline,
  WA_MDBA-LFDAT, sy-vline,
  WA_MDBA-FRGDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDBA 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_MDBA 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_MDBA INTO WA_MDBA.


*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 BANNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDBA-BANNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDBA-BANNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ABPSP, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_MDBA-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDBA-PSPEL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field REVLV
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_MDBA-REVLV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDBA-REVLV.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field SRM_CONTRACT_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MDBA-SRM_CONTRACT_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDBA-SRM_CONTRACT_ID.
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_MDBA_STR, 
BANNR TYPE STRING,
BANPS TYPE STRING,
BSART TYPE STRING,
PSTYP TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MENGE TYPE STRING,
MEINS TYPE STRING,
LFDAT TYPE STRING,
FRGDT TYPE STRING,
WEBAZ TYPE STRING,
RESWK TYPE STRING,
EKGRP TYPE STRING,
DISPO TYPE STRING,
LIFNR TYPE STRING,
FLIEF TYPE STRING,
INFNR TYPE STRING,
KONNR TYPE STRING,
KONPS TYPE STRING,
WEPOS TYPE STRING,
REPOS TYPE STRING,
WEUNB TYPE STRING,
KNTTP TYPE STRING,
SOBKZ TYPE STRING,
KZVBR TYPE STRING,
KZBWS TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPEL TYPE STRING,
RSNUM TYPE STRING,
EKORG TYPE STRING,
QUNUM TYPE STRING,
QUPOS TYPE STRING,
SERNR TYPE STRING,
FIXKZ TYPE STRING,
BESKZ TYPE STRING,
REVLV TYPE STRING,
VERID TYPE STRING,
VRTYP TYPE STRING,
CUOBJ TYPE STRING,
TECHS TYPE STRING,
LBLKZ TYPE STRING,
EMLIF TYPE STRING,
EMATN TYPE STRING,
ARSNR TYPE STRING,
ARSPS TYPE STRING,
BERID TYPE STRING,
UMSOK TYPE STRING,
PLIFZ TYPE STRING,
RESLO TYPE STRING,
PRIO_URG TYPE STRING,
PRIO_REQ TYPE STRING,
SRM_CONTRACT_ID TYPE STRING,
SRM_CONTRACT_ITM TYPE STRING,
BESWK TYPE STRING,
ANZSN TYPE STRING,
SGT_SCAT TYPE STRING,
WRF_CHARSTC1 TYPE STRING,
WRF_CHARSTC2 TYPE STRING,
WRF_CHARSTC3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDBA_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_MDBA_STR-BANNR sy-vline 
WA_MDBA_STR-BANPS sy-vline 
WA_MDBA_STR-BSART sy-vline 
WA_MDBA_STR-PSTYP sy-vline 
WA_MDBA_STR-MATNR sy-vline 
WA_MDBA_STR-WERKS sy-vline 
WA_MDBA_STR-LGORT sy-vline 
WA_MDBA_STR-MENGE sy-vline 
WA_MDBA_STR-MEINS sy-vline 
WA_MDBA_STR-LFDAT sy-vline 
WA_MDBA_STR-FRGDT sy-vline 
WA_MDBA_STR-WEBAZ sy-vline 
WA_MDBA_STR-RESWK sy-vline 
WA_MDBA_STR-EKGRP sy-vline 
WA_MDBA_STR-DISPO sy-vline 
WA_MDBA_STR-LIFNR sy-vline 
WA_MDBA_STR-FLIEF sy-vline 
WA_MDBA_STR-INFNR sy-vline 
WA_MDBA_STR-KONNR sy-vline 
WA_MDBA_STR-KONPS sy-vline 
WA_MDBA_STR-WEPOS sy-vline 
WA_MDBA_STR-REPOS sy-vline 
WA_MDBA_STR-WEUNB sy-vline 
WA_MDBA_STR-KNTTP sy-vline 
WA_MDBA_STR-SOBKZ sy-vline 
WA_MDBA_STR-KZVBR sy-vline 
WA_MDBA_STR-KZBWS sy-vline 
WA_MDBA_STR-KDAUF sy-vline 
WA_MDBA_STR-KDPOS sy-vline 
WA_MDBA_STR-PSPEL sy-vline 
WA_MDBA_STR-RSNUM sy-vline 
WA_MDBA_STR-EKORG sy-vline 
WA_MDBA_STR-QUNUM sy-vline 
WA_MDBA_STR-QUPOS sy-vline 
WA_MDBA_STR-SERNR sy-vline 
WA_MDBA_STR-FIXKZ sy-vline 
WA_MDBA_STR-BESKZ sy-vline 
WA_MDBA_STR-REVLV sy-vline 
WA_MDBA_STR-VERID sy-vline 
WA_MDBA_STR-VRTYP sy-vline 
WA_MDBA_STR-CUOBJ sy-vline 
WA_MDBA_STR-TECHS sy-vline 
WA_MDBA_STR-LBLKZ sy-vline 
WA_MDBA_STR-EMLIF sy-vline 
WA_MDBA_STR-EMATN sy-vline 
WA_MDBA_STR-ARSNR sy-vline 
WA_MDBA_STR-ARSPS sy-vline 
WA_MDBA_STR-BERID sy-vline 
WA_MDBA_STR-UMSOK sy-vline 
WA_MDBA_STR-PLIFZ sy-vline 
WA_MDBA_STR-RESLO sy-vline 
WA_MDBA_STR-PRIO_URG sy-vline 
WA_MDBA_STR-PRIO_REQ sy-vline 
WA_MDBA_STR-SRM_CONTRACT_ID sy-vline 
WA_MDBA_STR-SRM_CONTRACT_ITM sy-vline 
WA_MDBA_STR-BESWK sy-vline 
WA_MDBA_STR-ANZSN sy-vline 
WA_MDBA_STR-SGT_SCAT sy-vline 
WA_MDBA_STR-WRF_CHARSTC1 sy-vline 
WA_MDBA_STR-WRF_CHARSTC2 sy-vline 
WA_MDBA_STR-WRF_CHARSTC3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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