ABAP Select data from SAP table J_3RT1_LINE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RT1_LINE 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 J_3RT1_LINE. 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 J_3RT1_LINE 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_J_3RT1_LINE TYPE STANDARD TABLE OF J_3RT1_LINE,
      WA_J_3RT1_LINE TYPE J_3RT1_LINE,
      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: <J_3RT1_LINE> TYPE J_3RT1_LINE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RT1_LINE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RT1_LINE
  INTO TABLE IT_J_3RT1_LINE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RT1_LINE
*  INTO TABLE @DATA(IT_J_3RT1_LINE2).
*--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_J_3RT1_LINE INDEX 1 INTO DATA(WA_J_3RT1_LINE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RT1_LINE ASSIGNING <J_3RT1_LINE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RT1_LINE>-NUMLEV = 1.
<J_3RT1_LINE>-VBELN = 1.
<J_3RT1_LINE>-POSNR = 1.
<J_3RT1_LINE>-MATNR = 1.
<J_3RT1_LINE>-PREJSK_NUM = 1.

ENDLOOP.

LOOP AT IT_J_3RT1_LINE INTO WA_J_3RT1_LINE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RT1_LINE-ARTIKUL, sy-vline,
  WA_J_3RT1_LINE-ARKTX, sy-vline,
  WA_J_3RT1_LINE-BRGEW, sy-vline,
  WA_J_3RT1_LINE-NTGEW, sy-vline,
  WA_J_3RT1_LINE-GEWEI, sy-vline,
  WA_J_3RT1_LINE-LFIMG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RT1_LINE 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_J_3RT1_LINE 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_J_3RT1_LINE INTO WA_J_3RT1_LINE.


*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 VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RT1_LINE-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RT1_LINE-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RT1_LINE-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RT1_LINE-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3RT1_LINE-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RT1_LINE-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3RT1_LINE-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RT1_LINE-VRKME.
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_J_3RT1_LINE_STR, 
NUMLEV TYPE STRING,
VBELN TYPE STRING,
POSNR TYPE STRING,
MATNR TYPE STRING,
PREJSK_NUM TYPE STRING,
ARTIKUL TYPE STRING,
ARKTX TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
LFIMG TYPE STRING,
VRKME TYPE STRING,
MSEHT TYPE STRING,
PACK_TYPE TYPE STRING,
NETPR TYPE STRING,
NETWR TYPE STRING,
WAERS TYPE STRING,
PLACE TYPE STRING,
SEQ_NUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RT1_LINE_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_J_3RT1_LINE_STR-NUMLEV sy-vline 
WA_J_3RT1_LINE_STR-VBELN sy-vline 
WA_J_3RT1_LINE_STR-POSNR sy-vline 
WA_J_3RT1_LINE_STR-MATNR sy-vline 
WA_J_3RT1_LINE_STR-PREJSK_NUM sy-vline 
WA_J_3RT1_LINE_STR-ARTIKUL sy-vline 
WA_J_3RT1_LINE_STR-ARKTX sy-vline 
WA_J_3RT1_LINE_STR-BRGEW sy-vline 
WA_J_3RT1_LINE_STR-NTGEW sy-vline 
WA_J_3RT1_LINE_STR-GEWEI sy-vline 
WA_J_3RT1_LINE_STR-LFIMG sy-vline 
WA_J_3RT1_LINE_STR-VRKME sy-vline 
WA_J_3RT1_LINE_STR-MSEHT sy-vline 
WA_J_3RT1_LINE_STR-PACK_TYPE sy-vline 
WA_J_3RT1_LINE_STR-NETPR sy-vline 
WA_J_3RT1_LINE_STR-NETWR sy-vline 
WA_J_3RT1_LINE_STR-WAERS sy-vline 
WA_J_3RT1_LINE_STR-PLACE sy-vline 
WA_J_3RT1_LINE_STR-SEQ_NUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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