ABAP Select data from SAP table KNB1_APP_DI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP KNB1_APP_DI 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 KNB1_APP_DI. 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 KNB1_APP_DI 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_KNB1_APP_DI TYPE STANDARD TABLE OF KNB1_APP_DI,
      WA_KNB1_APP_DI TYPE KNB1_APP_DI,
      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: <KNB1_APP_DI> TYPE KNB1_APP_DI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_KNB1_APP_DI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM KNB1_APP_DI
  INTO TABLE IT_KNB1_APP_DI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KNB1_APP_DI
*  INTO TABLE @DATA(IT_KNB1_APP_DI2).
*--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_KNB1_APP_DI INDEX 1 INTO DATA(WA_KNB1_APP_DI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_KNB1_APP_DI ASSIGNING <KNB1_APP_DI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KNB1_APP_DI>-SPERR_KNB1 = 1.
<KNB1_APP_DI>-LOEVM_KNB1 = 1.
<KNB1_APP_DI>-ZUAWA = 1.
<KNB1_APP_DI>-BUSAB_KNB1 = 1.
<KNB1_APP_DI>-AKONT = 1.

ENDLOOP.

LOOP AT IT_KNB1_APP_DI INTO WA_KNB1_APP_DI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KNB1_APP_DI-BEGRU_KNB1, sy-vline,
  WA_KNB1_APP_DI-KNRZE, sy-vline,
  WA_KNB1_APP_DI-KNRZB, sy-vline,
  WA_KNB1_APP_DI-ZAMIM, sy-vline,
  WA_KNB1_APP_DI-ZAMIV, sy-vline,
  WA_KNB1_APP_DI-ZAMIR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KNB1_APP_DI 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_KNB1_APP_DI 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_KNB1_APP_DI INTO WA_KNB1_APP_DI.


*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_KNB1_APP_DI-AKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNB1_APP_DI-AKONT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KNB1_APP_DI-KNRZE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNB1_APP_DI-KNRZE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KNRZB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KNB1_APP_DI-KNRZB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNB1_APP_DI-KNRZB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KNB1_APP_DI-FDGRV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNB1_APP_DI-FDGRV.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REMIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KNB1_APP_DI-REMIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNB1_APP_DI-REMIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EKVBD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KNB1_APP_DI-EKVBD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KNB1_APP_DI-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_KNB1_APP_DI_STR, 
SPERR_KNB1 TYPE STRING,
LOEVM_KNB1 TYPE STRING,
ZUAWA TYPE STRING,
BUSAB_KNB1 TYPE STRING,
AKONT TYPE STRING,
BEGRU_KNB1 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,
INTAD TYPE STRING,
XKNZB TYPE STRING,
GUZTE TYPE STRING,
GRICD TYPE STRING,
GRIDT TYPE STRING,
WBRSL TYPE STRING,
CONFS TYPE STRING,
UPDAT TYPE STRING,
UPTIM TYPE STRING,
NODEL TYPE STRING,
TLFNS TYPE STRING,
CESSION_KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KNB1_APP_DI_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_KNB1_APP_DI_STR-SPERR_KNB1 sy-vline 
WA_KNB1_APP_DI_STR-LOEVM_KNB1 sy-vline 
WA_KNB1_APP_DI_STR-ZUAWA sy-vline 
WA_KNB1_APP_DI_STR-BUSAB_KNB1 sy-vline 
WA_KNB1_APP_DI_STR-AKONT sy-vline 
WA_KNB1_APP_DI_STR-BEGRU_KNB1 sy-vline 
WA_KNB1_APP_DI_STR-KNRZE sy-vline 
WA_KNB1_APP_DI_STR-KNRZB sy-vline 
WA_KNB1_APP_DI_STR-ZAMIM sy-vline 
WA_KNB1_APP_DI_STR-ZAMIV sy-vline 
WA_KNB1_APP_DI_STR-ZAMIR sy-vline 
WA_KNB1_APP_DI_STR-ZAMIB sy-vline 
WA_KNB1_APP_DI_STR-ZAMIO sy-vline 
WA_KNB1_APP_DI_STR-ZWELS sy-vline 
WA_KNB1_APP_DI_STR-XVERR sy-vline 
WA_KNB1_APP_DI_STR-ZAHLS sy-vline 
WA_KNB1_APP_DI_STR-ZTERM sy-vline 
WA_KNB1_APP_DI_STR-WAKON sy-vline 
WA_KNB1_APP_DI_STR-VZSKZ sy-vline 
WA_KNB1_APP_DI_STR-ZINDT sy-vline 
WA_KNB1_APP_DI_STR-ZINRT sy-vline 
WA_KNB1_APP_DI_STR-EIKTO sy-vline 
WA_KNB1_APP_DI_STR-ZSABE sy-vline 
WA_KNB1_APP_DI_STR-KVERM sy-vline 
WA_KNB1_APP_DI_STR-FDGRV sy-vline 
WA_KNB1_APP_DI_STR-VRBKZ sy-vline 
WA_KNB1_APP_DI_STR-VLIBB sy-vline 
WA_KNB1_APP_DI_STR-VRSZL sy-vline 
WA_KNB1_APP_DI_STR-VRSPR sy-vline 
WA_KNB1_APP_DI_STR-VRSNR sy-vline 
WA_KNB1_APP_DI_STR-VERDT sy-vline 
WA_KNB1_APP_DI_STR-PERKZ sy-vline 
WA_KNB1_APP_DI_STR-XDEZV sy-vline 
WA_KNB1_APP_DI_STR-XAUSZ sy-vline 
WA_KNB1_APP_DI_STR-WEBTR sy-vline 
WA_KNB1_APP_DI_STR-REMIT sy-vline 
WA_KNB1_APP_DI_STR-DATLZ sy-vline 
WA_KNB1_APP_DI_STR-XZVER sy-vline 
WA_KNB1_APP_DI_STR-TOGRU sy-vline 
WA_KNB1_APP_DI_STR-KULTG sy-vline 
WA_KNB1_APP_DI_STR-HBKID sy-vline 
WA_KNB1_APP_DI_STR-XPORE sy-vline 
WA_KNB1_APP_DI_STR-BLNKZ sy-vline 
WA_KNB1_APP_DI_STR-ALTKN sy-vline 
WA_KNB1_APP_DI_STR-ZGRUP sy-vline 
WA_KNB1_APP_DI_STR-URLID sy-vline 
WA_KNB1_APP_DI_STR-MGRUP sy-vline 
WA_KNB1_APP_DI_STR-LOCKB sy-vline 
WA_KNB1_APP_DI_STR-UZAWE sy-vline 
WA_KNB1_APP_DI_STR-EKVBD sy-vline 
WA_KNB1_APP_DI_STR-SREGL sy-vline 
WA_KNB1_APP_DI_STR-XEDIP sy-vline 
WA_KNB1_APP_DI_STR-FRGRP sy-vline 
WA_KNB1_APP_DI_STR-VRSDG sy-vline 
WA_KNB1_APP_DI_STR-TLFXS sy-vline 
WA_KNB1_APP_DI_STR-INTAD sy-vline 
WA_KNB1_APP_DI_STR-XKNZB sy-vline 
WA_KNB1_APP_DI_STR-GUZTE sy-vline 
WA_KNB1_APP_DI_STR-GRICD sy-vline 
WA_KNB1_APP_DI_STR-GRIDT sy-vline 
WA_KNB1_APP_DI_STR-WBRSL sy-vline 
WA_KNB1_APP_DI_STR-CONFS sy-vline 
WA_KNB1_APP_DI_STR-UPDAT sy-vline 
WA_KNB1_APP_DI_STR-UPTIM sy-vline 
WA_KNB1_APP_DI_STR-NODEL sy-vline 
WA_KNB1_APP_DI_STR-TLFNS sy-vline 
WA_KNB1_APP_DI_STR-CESSION_KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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