ABAP Select data from SAP table TJWAK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TJWAK
*  INTO TABLE @DATA(IT_TJWAK2).
*--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_TJWAK INDEX 1 INTO DATA(WA_TJWAK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TJWAK>-MANDT = 1.
<TJWAK>-WERBEAKT = 1.
<TJWAK>-GUELTIGVON = 1.
<TJWAK>-GUELTIGBIS = 1.
<TJWAK>-DRERZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TJWAK-CO_AUFNR, sy-vline,
  WA_TJWAK-GEOEIN, sy-vline,
  WA_TJWAK-ANZWERBPLN, sy-vline,
  WA_TJWAK-ANZPROBPLN, sy-vline,
  WA_TJWAK-ANZABOPLN, sy-vline,
  WA_TJWAK-ANZWERBIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TJWAK 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_TJWAK 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_TJWAK INTO WA_TJWAK.


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

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

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

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

*Conversion exit MCAMP, internal->external for field CAMPAIGN
CALL FUNCTION 'CONVERSION_EXIT_MCAMP_OUTPUT'
  EXPORTING
    input =                      WA_TJWAK-CAMPAIGN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TJWAK-CAMPAIGN.
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_TJWAK_STR, 
MANDT TYPE STRING,
WERBEAKT TYPE STRING,
GUELTIGVON TYPE STRING,
GUELTIGBIS TYPE STRING,
DRERZ TYPE STRING,
CO_AUFNR TYPE STRING,
GEOEIN TYPE STRING,
ANZWERBPLN TYPE STRING,
ANZPROBPLN TYPE STRING,
ANZABOPLN TYPE STRING,
ANZWERBIST TYPE STRING,
ANZPROBIST TYPE STRING,
ANZABOIST TYPE STRING,
ANZETPROBE TYPE STRING,
RQUOTE_PLN TYPE STRING,
RQUOTE_IST TYPE STRING,
EQUOTE_PLN TYPE STRING,
EQUOTE_IST TYPE STRING,
WAERS_PLN TYPE STRING,
WAERS_IST TYPE STRING,
KOSTEN_PLN TYPE STRING,
KOSTEN_IST TYPE STRING,
CPO TYPE STRING,
ANZABOISTS TYPE STRING,
AKTDATUM TYPE STRING,
ERFUSER TYPE STRING,
ERFDATE TYPE STRING,
ERFTIME TYPE STRING,
AENUSER TYPE STRING,
AENDATE TYPE STRING,
AENTIME TYPE STRING,
ANZABOISTX TYPE STRING,
ANZKSTLPLN TYPE STRING,
ANZKSTLIST TYPE STRING,
CAMPAIGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TJWAK_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_TJWAK_STR-MANDT sy-vline 
WA_TJWAK_STR-WERBEAKT sy-vline 
WA_TJWAK_STR-GUELTIGVON sy-vline 
WA_TJWAK_STR-GUELTIGBIS sy-vline 
WA_TJWAK_STR-DRERZ sy-vline 
WA_TJWAK_STR-CO_AUFNR sy-vline 
WA_TJWAK_STR-GEOEIN sy-vline 
WA_TJWAK_STR-ANZWERBPLN sy-vline 
WA_TJWAK_STR-ANZPROBPLN sy-vline 
WA_TJWAK_STR-ANZABOPLN sy-vline 
WA_TJWAK_STR-ANZWERBIST sy-vline 
WA_TJWAK_STR-ANZPROBIST sy-vline 
WA_TJWAK_STR-ANZABOIST sy-vline 
WA_TJWAK_STR-ANZETPROBE sy-vline 
WA_TJWAK_STR-RQUOTE_PLN sy-vline 
WA_TJWAK_STR-RQUOTE_IST sy-vline 
WA_TJWAK_STR-EQUOTE_PLN sy-vline 
WA_TJWAK_STR-EQUOTE_IST sy-vline 
WA_TJWAK_STR-WAERS_PLN sy-vline 
WA_TJWAK_STR-WAERS_IST sy-vline 
WA_TJWAK_STR-KOSTEN_PLN sy-vline 
WA_TJWAK_STR-KOSTEN_IST sy-vline 
WA_TJWAK_STR-CPO sy-vline 
WA_TJWAK_STR-ANZABOISTS sy-vline 
WA_TJWAK_STR-AKTDATUM sy-vline 
WA_TJWAK_STR-ERFUSER sy-vline 
WA_TJWAK_STR-ERFDATE sy-vline 
WA_TJWAK_STR-ERFTIME sy-vline 
WA_TJWAK_STR-AENUSER sy-vline 
WA_TJWAK_STR-AENDATE sy-vline 
WA_TJWAK_STR-AENTIME sy-vline 
WA_TJWAK_STR-ANZABOISTX sy-vline 
WA_TJWAK_STR-ANZKSTLPLN sy-vline 
WA_TJWAK_STR-ANZKSTLIST sy-vline 
WA_TJWAK_STR-CAMPAIGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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