ABAP Select data from SAP table JITDIABUFFER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JITDIABUFFER
*  INTO TABLE @DATA(IT_JITDIABUFFER2).
*--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_JITDIABUFFER INDEX 1 INTO DATA(WA_JITDIABUFFER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JITDIABUFFER>-MANDT = 1.
<JITDIABUFFER>-POSID = 1.
<JITDIABUFFER>-JINUM = 1.
<JITDIABUFFER>-ANLIE = 1.
<JITDIABUFFER>-DESTI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JITDIABUFFER-ABLAD, sy-vline,
  WA_JITDIABUFFER-FLDPO, sy-vline,
  WA_JITDIABUFFER-LIUMF, sy-vline,
  WA_JITDIABUFFER-WERKS, sy-vline,
  WA_JITDIABUFFER-VERID, sy-vline,
  WA_JITDIABUFFER-IPROF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JITDIABUFFER 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_JITDIABUFFER 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_JITDIABUFFER INTO WA_JITDIABUFFER.


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

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

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

*Conversion exit ALPHA, internal->external for field VBELN_VL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JITDIABUFFER-VBELN_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JITDIABUFFER-VBELN_VL.
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_JITDIABUFFER_STR, 
MANDT TYPE STRING,
POSID TYPE STRING,
JINUM TYPE STRING,
ANLIE TYPE STRING,
DESTI TYPE STRING,
ABLAD TYPE STRING,
FLDPO TYPE STRING,
LIUMF TYPE STRING,
WERKS TYPE STRING,
VERID TYPE STRING,
IPROF TYPE STRING,
HUPRF TYPE STRING,
CUSTTX TYPE STRING,
POSGT TYPE STRING,
MAKTX TYPE STRING,
CNTRLT TYPE STRING,
DOLOG TYPE STRING,
MDV01 TYPE STRING,
TZONE_PG TYPE STRING,
MEINS_PG TYPE STRING,
VHART_PG TYPE STRING,
MAGRV_PG TYPE STRING,
ALORT_PG TYPE STRING,
ELPRO_PG TYPE STRING,
PRVBE TYPE STRING,
CNTRL TYPE STRING,
PDATE TYPE STRING,
EXTST TYPE STRING,
EXDAT TYPE STRING,
INTST TYPE STRING,
INDAT TYPE STRING,
FERPA TYPE STRING,
RUECK TYPE STRING,
BACKF TYPE STRING,
EXIDV TYPE STRING,
DDATE TYPE STRING,
VBELN_VL TYPE STRING,
DCREA TYPE STRING,
AGTSL TYPE STRING,
GRPIN TYPE STRING,
GRIND TYPE STRING,
BWEXT TYPE STRING,
RDATE TYPE STRING,
POSNR_VL TYPE STRING,
TEXIT TYPE STRING,
CGARC TYPE STRING,
OUTEX TYPE STRING,
GIPOS TYPE STRING,
PDATUM TYPE STRING,
PZEIT TYPE STRING,
EDATUM TYPE STRING,
EZEIT TYPE STRING,
IDATUM TYPE STRING,
IZEIT TYPE STRING,
DDATUM TYPE STRING,
DZEIT TYPE STRING,
RDATUM TYPE STRING,
RZEIT TYPE STRING,
CUSTO TYPE STRING,
ISWRK TYPE STRING,
ISLOC TYPE STRING,
GENHU TYPE STRING,
SWIST TYPE STRING,
PRODN TYPE STRING,
ABTYP TYPE STRING,
SETCN TYPE STRING,
CREHU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JITDIABUFFER_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_JITDIABUFFER_STR-MANDT sy-vline 
WA_JITDIABUFFER_STR-POSID sy-vline 
WA_JITDIABUFFER_STR-JINUM sy-vline 
WA_JITDIABUFFER_STR-ANLIE sy-vline 
WA_JITDIABUFFER_STR-DESTI sy-vline 
WA_JITDIABUFFER_STR-ABLAD sy-vline 
WA_JITDIABUFFER_STR-FLDPO sy-vline 
WA_JITDIABUFFER_STR-LIUMF sy-vline 
WA_JITDIABUFFER_STR-WERKS sy-vline 
WA_JITDIABUFFER_STR-VERID sy-vline 
WA_JITDIABUFFER_STR-IPROF sy-vline 
WA_JITDIABUFFER_STR-HUPRF sy-vline 
WA_JITDIABUFFER_STR-CUSTTX sy-vline 
WA_JITDIABUFFER_STR-POSGT sy-vline 
WA_JITDIABUFFER_STR-MAKTX sy-vline 
WA_JITDIABUFFER_STR-CNTRLT sy-vline 
WA_JITDIABUFFER_STR-DOLOG sy-vline 
WA_JITDIABUFFER_STR-MDV01 sy-vline 
WA_JITDIABUFFER_STR-TZONE_PG sy-vline 
WA_JITDIABUFFER_STR-MEINS_PG sy-vline 
WA_JITDIABUFFER_STR-VHART_PG sy-vline 
WA_JITDIABUFFER_STR-MAGRV_PG sy-vline 
WA_JITDIABUFFER_STR-ALORT_PG sy-vline 
WA_JITDIABUFFER_STR-ELPRO_PG sy-vline 
WA_JITDIABUFFER_STR-PRVBE sy-vline 
WA_JITDIABUFFER_STR-CNTRL sy-vline 
WA_JITDIABUFFER_STR-PDATE sy-vline 
WA_JITDIABUFFER_STR-EXTST sy-vline 
WA_JITDIABUFFER_STR-EXDAT sy-vline 
WA_JITDIABUFFER_STR-INTST sy-vline 
WA_JITDIABUFFER_STR-INDAT sy-vline 
WA_JITDIABUFFER_STR-FERPA sy-vline 
WA_JITDIABUFFER_STR-RUECK sy-vline 
WA_JITDIABUFFER_STR-BACKF sy-vline 
WA_JITDIABUFFER_STR-EXIDV sy-vline 
WA_JITDIABUFFER_STR-DDATE sy-vline 
WA_JITDIABUFFER_STR-VBELN_VL sy-vline 
WA_JITDIABUFFER_STR-DCREA sy-vline 
WA_JITDIABUFFER_STR-AGTSL sy-vline 
WA_JITDIABUFFER_STR-GRPIN sy-vline 
WA_JITDIABUFFER_STR-GRIND sy-vline 
WA_JITDIABUFFER_STR-BWEXT sy-vline 
WA_JITDIABUFFER_STR-RDATE sy-vline 
WA_JITDIABUFFER_STR-POSNR_VL sy-vline 
WA_JITDIABUFFER_STR-TEXIT sy-vline 
WA_JITDIABUFFER_STR-CGARC sy-vline 
WA_JITDIABUFFER_STR-OUTEX sy-vline 
WA_JITDIABUFFER_STR-GIPOS sy-vline 
WA_JITDIABUFFER_STR-PDATUM sy-vline 
WA_JITDIABUFFER_STR-PZEIT sy-vline 
WA_JITDIABUFFER_STR-EDATUM sy-vline 
WA_JITDIABUFFER_STR-EZEIT sy-vline 
WA_JITDIABUFFER_STR-IDATUM sy-vline 
WA_JITDIABUFFER_STR-IZEIT sy-vline 
WA_JITDIABUFFER_STR-DDATUM sy-vline 
WA_JITDIABUFFER_STR-DZEIT sy-vline 
WA_JITDIABUFFER_STR-RDATUM sy-vline 
WA_JITDIABUFFER_STR-RZEIT sy-vline 
WA_JITDIABUFFER_STR-CUSTO sy-vline 
WA_JITDIABUFFER_STR-ISWRK sy-vline 
WA_JITDIABUFFER_STR-ISLOC sy-vline 
WA_JITDIABUFFER_STR-GENHU sy-vline 
WA_JITDIABUFFER_STR-SWIST sy-vline 
WA_JITDIABUFFER_STR-PRODN sy-vline 
WA_JITDIABUFFER_STR-ABTYP sy-vline 
WA_JITDIABUFFER_STR-SETCN sy-vline 
WA_JITDIABUFFER_STR-CREHU sy-vline      INTO ld_text SEPARATED BY SPACE.

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