ABAP Select data from SAP table E3KNB1M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3KNB1M 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 E3KNB1M. 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 E3KNB1M 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_E3KNB1M TYPE STANDARD TABLE OF E3KNB1M,
      WA_E3KNB1M TYPE E3KNB1M,
      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: <E3KNB1M> TYPE E3KNB1M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3KNB1M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3KNB1M
  INTO TABLE IT_E3KNB1M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3KNB1M
*  INTO TABLE @DATA(IT_E3KNB1M2).
*--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_E3KNB1M INDEX 1 INTO DATA(WA_E3KNB1M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3KNB1M ASSIGNING <E3KNB1M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3KNB1M>-MSGFN = 1.
<E3KNB1M>-BUKRS = 1.
<E3KNB1M>-SPERR = 1.
<E3KNB1M>-LOEVM = 1.
<E3KNB1M>-ZUAWA = 1.

ENDLOOP.

LOOP AT IT_E3KNB1M INTO WA_E3KNB1M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3KNB1M-BUSAB, sy-vline,
  WA_E3KNB1M-AKONT, sy-vline,
  WA_E3KNB1M-BEGRU, sy-vline,
  WA_E3KNB1M-KNRZE, sy-vline,
  WA_E3KNB1M-KNRZB, sy-vline,
  WA_E3KNB1M-ZAMIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3KNB1M 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_E3KNB1M 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_E3KNB1M INTO WA_E3KNB1M.


*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 AKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-AKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-AKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-KNRZE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-KNRZE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-KNRZB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-KNRZB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-FDGRV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-FDGRV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field VLIBB
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-VLIBB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-VLIBB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field WEBTR
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-WEBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-WEBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REMIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-REMIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-REMIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EKVBD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KNB1M-EKVBD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KNB1M-EKVBD.
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_E3KNB1M_STR, 
MSGFN TYPE STRING,
BUKRS TYPE STRING,
SPERR TYPE STRING,
LOEVM TYPE STRING,
ZUAWA TYPE STRING,
BUSAB TYPE STRING,
AKONT TYPE STRING,
BEGRU TYPE STRING,
KNRZE TYPE STRING,
KNRZB TYPE STRING,
ZAMIM TYPE STRING,
ZAMIV TYPE STRING,
ZAMIR TYPE STRING,
ZAMIB TYPE STRING,
ZAMIO TYPE STRING,
ZWELS TYPE STRING,
XVERR TYPE STRING,
ZAHLS TYPE STRING,
ZTERM TYPE STRING,
WAKON TYPE STRING,
VZSKZ TYPE STRING,
ZINDT TYPE STRING,
ZINRT TYPE STRING,
EIKTO TYPE STRING,
ZSABE TYPE STRING,
KVERM TYPE STRING,
FDGRV TYPE STRING,
VRBKZ TYPE STRING,
VLIBB TYPE STRING,
VRSZL TYPE STRING,
VRSPR TYPE STRING,
VRSNR TYPE STRING,
VERDT TYPE STRING,
PERKZ TYPE STRING,
XDEZV TYPE STRING,
XAUSZ TYPE STRING,
WEBTR TYPE STRING,
REMIT TYPE STRING,
DATLZ TYPE STRING,
XZVER TYPE STRING,
TOGRU TYPE STRING,
KULTG TYPE STRING,
HBKID TYPE STRING,
XPORE TYPE STRING,
BLNKZ TYPE STRING,
ALTKN TYPE STRING,
ZGRUP TYPE STRING,
URLID TYPE STRING,
MGRUP TYPE STRING,
LOCKB TYPE STRING,
UZAWE TYPE STRING,
EKVBD TYPE STRING,
SREGL TYPE STRING,
XEDIP TYPE STRING,
FRGRP TYPE STRING,
VRSDG TYPE STRING,
TLFXS TYPE STRING,
PERNR TYPE STRING,
INTAD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3KNB1M_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_E3KNB1M_STR-MSGFN sy-vline 
WA_E3KNB1M_STR-BUKRS sy-vline 
WA_E3KNB1M_STR-SPERR sy-vline 
WA_E3KNB1M_STR-LOEVM sy-vline 
WA_E3KNB1M_STR-ZUAWA sy-vline 
WA_E3KNB1M_STR-BUSAB sy-vline 
WA_E3KNB1M_STR-AKONT sy-vline 
WA_E3KNB1M_STR-BEGRU sy-vline 
WA_E3KNB1M_STR-KNRZE sy-vline 
WA_E3KNB1M_STR-KNRZB sy-vline 
WA_E3KNB1M_STR-ZAMIM sy-vline 
WA_E3KNB1M_STR-ZAMIV sy-vline 
WA_E3KNB1M_STR-ZAMIR sy-vline 
WA_E3KNB1M_STR-ZAMIB sy-vline 
WA_E3KNB1M_STR-ZAMIO sy-vline 
WA_E3KNB1M_STR-ZWELS sy-vline 
WA_E3KNB1M_STR-XVERR sy-vline 
WA_E3KNB1M_STR-ZAHLS sy-vline 
WA_E3KNB1M_STR-ZTERM sy-vline 
WA_E3KNB1M_STR-WAKON sy-vline 
WA_E3KNB1M_STR-VZSKZ sy-vline 
WA_E3KNB1M_STR-ZINDT sy-vline 
WA_E3KNB1M_STR-ZINRT sy-vline 
WA_E3KNB1M_STR-EIKTO sy-vline 
WA_E3KNB1M_STR-ZSABE sy-vline 
WA_E3KNB1M_STR-KVERM sy-vline 
WA_E3KNB1M_STR-FDGRV sy-vline 
WA_E3KNB1M_STR-VRBKZ sy-vline 
WA_E3KNB1M_STR-VLIBB sy-vline 
WA_E3KNB1M_STR-VRSZL sy-vline 
WA_E3KNB1M_STR-VRSPR sy-vline 
WA_E3KNB1M_STR-VRSNR sy-vline 
WA_E3KNB1M_STR-VERDT sy-vline 
WA_E3KNB1M_STR-PERKZ sy-vline 
WA_E3KNB1M_STR-XDEZV sy-vline 
WA_E3KNB1M_STR-XAUSZ sy-vline 
WA_E3KNB1M_STR-WEBTR sy-vline 
WA_E3KNB1M_STR-REMIT sy-vline 
WA_E3KNB1M_STR-DATLZ sy-vline 
WA_E3KNB1M_STR-XZVER sy-vline 
WA_E3KNB1M_STR-TOGRU sy-vline 
WA_E3KNB1M_STR-KULTG sy-vline 
WA_E3KNB1M_STR-HBKID sy-vline 
WA_E3KNB1M_STR-XPORE sy-vline 
WA_E3KNB1M_STR-BLNKZ sy-vline 
WA_E3KNB1M_STR-ALTKN sy-vline 
WA_E3KNB1M_STR-ZGRUP sy-vline 
WA_E3KNB1M_STR-URLID sy-vline 
WA_E3KNB1M_STR-MGRUP sy-vline 
WA_E3KNB1M_STR-LOCKB sy-vline 
WA_E3KNB1M_STR-UZAWE sy-vline 
WA_E3KNB1M_STR-EKVBD sy-vline 
WA_E3KNB1M_STR-SREGL sy-vline 
WA_E3KNB1M_STR-XEDIP sy-vline 
WA_E3KNB1M_STR-FRGRP sy-vline 
WA_E3KNB1M_STR-VRSDG sy-vline 
WA_E3KNB1M_STR-TLFXS sy-vline 
WA_E3KNB1M_STR-PERNR sy-vline 
WA_E3KNB1M_STR-INTAD sy-vline      INTO ld_text SEPARATED BY SPACE.

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