ABAP Select data from SAP table VIAK13T into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP VIAK13T 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 VIAK13T. 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 VIAK13T 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_VIAK13T TYPE STANDARD TABLE OF VIAK13T,
      WA_VIAK13T TYPE VIAK13T,
      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: <VIAK13T> TYPE VIAK13T.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_VIAK13T.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM VIAK13T
  INTO TABLE IT_VIAK13T.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VIAK13T
*  INTO TABLE @DATA(IT_VIAK13T2).
*--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_VIAK13T INDEX 1 INTO DATA(WA_VIAK13T2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_VIAK13T ASSIGNING <VIAK13T>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VIAK13T>-MANDT = 1.
<VIAK13T>-BUKRS = 1.
<VIAK13T>-AESWENR = 1.
<VIAK13T>-AESNKSL = 1.
<VIAK13T>-AESEMPSL = 1.

ENDLOOP.

LOOP AT IT_VIAK13T INTO WA_VIAK13T.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VIAK13T-DVONPER, sy-vline,
  WA_VIAK13T-DBISPER, sy-vline,
  WA_VIAK13T-NPERSOND, sy-vline,
  WA_VIAK13T-TABIX, sy-vline,
  WA_VIAK13T-SWENR, sy-vline,
  WA_VIAK13T-SMENR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VIAK13T 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_VIAK13T 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_VIAK13T INTO WA_VIAK13T.


*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 SWENR, internal->external for field AESWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-AESWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-AESWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AESNKSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-AESNKSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-AESNKSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AESEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-AESEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-AESEMPSL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SMENR, internal->external for field SMENR
CALL FUNCTION 'CONVERSION_EXIT_SMENR_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-SMENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-SMENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SMIVE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-SMIVE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-SMIVE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SMIVERMS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-SMIVERMS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-SMIVERMS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABWKUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VIAK13T-ABWKUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VIAK13T-ABWKUNNR.
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_VIAK13T_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
AESWENR TYPE STRING,
AESNKSL TYPE STRING,
AESEMPSL TYPE STRING,
DVONPER TYPE STRING,
DBISPER TYPE STRING,
NPERSOND TYPE STRING,
TABIX TYPE STRING,
SWENR TYPE STRING,
SMENR TYPE STRING,
SMIVE TYPE STRING,
SNKS TYPE STRING,
MVSNKS TYPE STRING,
DTDAB TYPE STRING,
DTDBIS TYPE STRING,
ATAGE TYPE STRING,
BUMLGR TYPE STRING,
PMIETER TYPE STRING,
BEZGR TYPE STRING,
SKOART TYPE STRING,
ABREART TYPE STRING,
JVZEIG TYPE STRING,
JMWST TYPE STRING,
MWSKZ TYPE STRING,
BNETTO TYPE STRING,
BSTEUER TYPE STRING,
TWAER TYPE STRING,
DABRECH TYPE STRING,
JVSTOPT TYPE STRING,
SNKSRMS TYPE STRING,
SMIVERMS TYPE STRING,
ABWKUNNR TYPE STRING,
SBEWART TYPE STRING,
SABRG TYPE STRING,
HEIZPROZ TYPE STRING,
SBELEGNG TYPE STRING,
BELEGNGRMS TYPE STRING,
VVABBLN TYPE STRING,
XEINHEIT TYPE STRING,
TXJCD TYPE STRING,
UEBERAE TYPE STRING,
JNOTAXCORR TYPE STRING,
JDIRECT TYPE STRING,
VVANTM TYPE STRING,
VVANTV TYPE STRING,
BBRUTTO TYPE STRING,
BEINHNET TYPE STRING,
BEINHBRT TYPE STRING,
BGESAMT TYPE STRING,
JVERBRNUM TYPE STRING,
SMIVEBERGL TYPE STRING,
DTDAB_TAGE TYPE STRING,
PANTPROZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VIAK13T_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_VIAK13T_STR-MANDT sy-vline 
WA_VIAK13T_STR-BUKRS sy-vline 
WA_VIAK13T_STR-AESWENR sy-vline 
WA_VIAK13T_STR-AESNKSL sy-vline 
WA_VIAK13T_STR-AESEMPSL sy-vline 
WA_VIAK13T_STR-DVONPER sy-vline 
WA_VIAK13T_STR-DBISPER sy-vline 
WA_VIAK13T_STR-NPERSOND sy-vline 
WA_VIAK13T_STR-TABIX sy-vline 
WA_VIAK13T_STR-SWENR sy-vline 
WA_VIAK13T_STR-SMENR sy-vline 
WA_VIAK13T_STR-SMIVE sy-vline 
WA_VIAK13T_STR-SNKS sy-vline 
WA_VIAK13T_STR-MVSNKS sy-vline 
WA_VIAK13T_STR-DTDAB sy-vline 
WA_VIAK13T_STR-DTDBIS sy-vline 
WA_VIAK13T_STR-ATAGE sy-vline 
WA_VIAK13T_STR-BUMLGR sy-vline 
WA_VIAK13T_STR-PMIETER sy-vline 
WA_VIAK13T_STR-BEZGR sy-vline 
WA_VIAK13T_STR-SKOART sy-vline 
WA_VIAK13T_STR-ABREART sy-vline 
WA_VIAK13T_STR-JVZEIG sy-vline 
WA_VIAK13T_STR-JMWST sy-vline 
WA_VIAK13T_STR-MWSKZ sy-vline 
WA_VIAK13T_STR-BNETTO sy-vline 
WA_VIAK13T_STR-BSTEUER sy-vline 
WA_VIAK13T_STR-TWAER sy-vline 
WA_VIAK13T_STR-DABRECH sy-vline 
WA_VIAK13T_STR-JVSTOPT sy-vline 
WA_VIAK13T_STR-SNKSRMS sy-vline 
WA_VIAK13T_STR-SMIVERMS sy-vline 
WA_VIAK13T_STR-ABWKUNNR sy-vline 
WA_VIAK13T_STR-SBEWART sy-vline 
WA_VIAK13T_STR-SABRG sy-vline 
WA_VIAK13T_STR-HEIZPROZ sy-vline 
WA_VIAK13T_STR-SBELEGNG sy-vline 
WA_VIAK13T_STR-BELEGNGRMS sy-vline 
WA_VIAK13T_STR-VVABBLN sy-vline 
WA_VIAK13T_STR-XEINHEIT sy-vline 
WA_VIAK13T_STR-TXJCD sy-vline 
WA_VIAK13T_STR-UEBERAE sy-vline 
WA_VIAK13T_STR-JNOTAXCORR sy-vline 
WA_VIAK13T_STR-JDIRECT sy-vline 
WA_VIAK13T_STR-VVANTM sy-vline 
WA_VIAK13T_STR-VVANTV sy-vline 
WA_VIAK13T_STR-BBRUTTO sy-vline 
WA_VIAK13T_STR-BEINHNET sy-vline 
WA_VIAK13T_STR-BEINHBRT sy-vline 
WA_VIAK13T_STR-BGESAMT sy-vline 
WA_VIAK13T_STR-JVERBRNUM sy-vline 
WA_VIAK13T_STR-SMIVEBERGL sy-vline 
WA_VIAK13T_STR-DTDAB_TAGE sy-vline 
WA_VIAK13T_STR-PANTPROZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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