ABAP Select data from SAP table JIT_MATNR_PRODN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM JIT_MATNR_PRODN
*  INTO TABLE @DATA(IT_JIT_MATNR_PRODN2).
*--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_JIT_MATNR_PRODN INDEX 1 INTO DATA(WA_JIT_MATNR_PRODN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<JIT_MATNR_PRODN>-MATNR = 1.
<JIT_MATNR_PRODN>-KDMAT = 1.
<JIT_MATNR_PRODN>-QUANT = 1.
<JIT_MATNR_PRODN>-PRODN = 1.
<JIT_MATNR_PRODN>-ABTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_JIT_MATNR_PRODN-JINUM, sy-vline,
  WA_JIT_MATNR_PRODN-POSID, sy-vline,
  WA_JIT_MATNR_PRODN-MATID, sy-vline,
  WA_JIT_MATNR_PRODN-VBELN, sy-vline,
  WA_JIT_MATNR_PRODN-POSNR, sy-vline,
  WA_JIT_MATNR_PRODN-SEQNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_JIT_MATNR_PRODN 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_JIT_MATNR_PRODN 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_JIT_MATNR_PRODN INTO WA_JIT_MATNR_PRODN.


*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 MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_JIT_MATNR_PRODN-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JIT_MATNR_PRODN-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field EXIDV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_JIT_MATNR_PRODN-EXIDV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_JIT_MATNR_PRODN-EXIDV.
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_JIT_MATNR_PRODN_STR, 
MATNR TYPE STRING,
KDMAT TYPE STRING,
QUANT TYPE STRING,
PRODN TYPE STRING,
ABTYP TYPE STRING,
JINUM TYPE STRING,
POSID TYPE STRING,
MATID TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
SEQNR TYPE STRING,
VETYP TYPE STRING,
VEHID TYPE STRING,
SSPEZ TYPE STRING,
GRPIN TYPE STRING,
GRIND TYPE STRING,
EXIDV TYPE STRING,
POSNR_VL TYPE STRING,
GIPOS TYPE STRING,
JCPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_JIT_MATNR_PRODN_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_JIT_MATNR_PRODN_STR-MATNR sy-vline 
WA_JIT_MATNR_PRODN_STR-KDMAT sy-vline 
WA_JIT_MATNR_PRODN_STR-QUANT sy-vline 
WA_JIT_MATNR_PRODN_STR-PRODN sy-vline 
WA_JIT_MATNR_PRODN_STR-ABTYP sy-vline 
WA_JIT_MATNR_PRODN_STR-JINUM sy-vline 
WA_JIT_MATNR_PRODN_STR-POSID sy-vline 
WA_JIT_MATNR_PRODN_STR-MATID sy-vline 
WA_JIT_MATNR_PRODN_STR-VBELN sy-vline 
WA_JIT_MATNR_PRODN_STR-POSNR sy-vline 
WA_JIT_MATNR_PRODN_STR-SEQNR sy-vline 
WA_JIT_MATNR_PRODN_STR-VETYP sy-vline 
WA_JIT_MATNR_PRODN_STR-VEHID sy-vline 
WA_JIT_MATNR_PRODN_STR-SSPEZ sy-vline 
WA_JIT_MATNR_PRODN_STR-GRPIN sy-vline 
WA_JIT_MATNR_PRODN_STR-GRIND sy-vline 
WA_JIT_MATNR_PRODN_STR-EXIDV sy-vline 
WA_JIT_MATNR_PRODN_STR-POSNR_VL sy-vline 
WA_JIT_MATNR_PRODN_STR-GIPOS sy-vline 
WA_JIT_MATNR_PRODN_STR-JCPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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