ABAP Select data from SAP table J_7LM04 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LM04 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_7LM04. 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_7LM04 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_7LM04 TYPE STANDARD TABLE OF J_7LM04,
      WA_J_7LM04 TYPE J_7LM04,
      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_7LM04> TYPE J_7LM04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LM04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LM04
  INTO TABLE IT_J_7LM04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LM04
*  INTO TABLE @DATA(IT_J_7LM042).
*--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_7LM04 INDEX 1 INTO DATA(WA_J_7LM042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LM04 ASSIGNING <J_7LM04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LM04>-MANDT = 1.
<J_7LM04>-MATNR = 1.
<J_7LM04>-BUKRS = 1.
<J_7LM04>-LAND1 = 1.
<J_7LM04>-VRKME = 1.

ENDLOOP.

LOOP AT IT_J_7LM04 INTO WA_J_7LM04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LM04-VARIANTE, sy-vline,
  WA_J_7LM04-VRPNR, sy-vline,
  WA_J_7LM04-DATBI, sy-vline,
  WA_J_7LM04-DATAB, sy-vline,
  WA_J_7LM04-VRSIO, sy-vline,
  WA_J_7LM04-VVARIANTE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LM04 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_7LM04 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_7LM04 INTO WA_J_7LM04.


*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_J_7LM04-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LM04-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VRPNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LM04-VRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-VRPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LM04-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEABMZ
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LM04-MEABMZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-MEABMZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEIZ
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LM04-GEWEIZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-GEWEIZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINSZ
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LM04-MEINSZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LM04-MEINSZ.
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_7LM04_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
VRKME TYPE STRING,
VARIANTE TYPE STRING,
VRPNR TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
VRSIO TYPE STRING,
VVARIANTE TYPE STRING,
VPGRP TYPE STRING,
KPEIN TYPE STRING,
MEINS TYPE STRING,
FMENG TYPE STRING,
VPEBENE TYPE STRING,
VERSCHNITT TYPE STRING,
KZVPMM TYPE STRING,
KZVPSD TYPE STRING,
LAENGZ TYPE STRING,
BREITZ TYPE STRING,
HOEHEZ TYPE STRING,
MEABMZ TYPE STRING,
NTGEWZ TYPE STRING,
GEWEIZ TYPE STRING,
FMENGZ TYPE STRING,
MEINSZ TYPE STRING,
DATABADM TYPE STRING,
DATBIADM TYPE STRING,
ERSDAADM TYPE STRING,
ERZETADM TYPE STRING,
ERNAMADM TYPE STRING,
LAEDAADM TYPE STRING,
AEZETADM TYPE STRING,
AENAMADM TYPE STRING,
LVORMADM TYPE STRING,
ACTIVEPAC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LM04_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_7LM04_STR-MANDT sy-vline 
WA_J_7LM04_STR-MATNR sy-vline 
WA_J_7LM04_STR-BUKRS sy-vline 
WA_J_7LM04_STR-LAND1 sy-vline 
WA_J_7LM04_STR-VRKME sy-vline 
WA_J_7LM04_STR-VARIANTE sy-vline 
WA_J_7LM04_STR-VRPNR sy-vline 
WA_J_7LM04_STR-DATBI sy-vline 
WA_J_7LM04_STR-DATAB sy-vline 
WA_J_7LM04_STR-VRSIO sy-vline 
WA_J_7LM04_STR-VVARIANTE sy-vline 
WA_J_7LM04_STR-VPGRP sy-vline 
WA_J_7LM04_STR-KPEIN sy-vline 
WA_J_7LM04_STR-MEINS sy-vline 
WA_J_7LM04_STR-FMENG sy-vline 
WA_J_7LM04_STR-VPEBENE sy-vline 
WA_J_7LM04_STR-VERSCHNITT sy-vline 
WA_J_7LM04_STR-KZVPMM sy-vline 
WA_J_7LM04_STR-KZVPSD sy-vline 
WA_J_7LM04_STR-LAENGZ sy-vline 
WA_J_7LM04_STR-BREITZ sy-vline 
WA_J_7LM04_STR-HOEHEZ sy-vline 
WA_J_7LM04_STR-MEABMZ sy-vline 
WA_J_7LM04_STR-NTGEWZ sy-vline 
WA_J_7LM04_STR-GEWEIZ sy-vline 
WA_J_7LM04_STR-FMENGZ sy-vline 
WA_J_7LM04_STR-MEINSZ sy-vline 
WA_J_7LM04_STR-DATABADM sy-vline 
WA_J_7LM04_STR-DATBIADM sy-vline 
WA_J_7LM04_STR-ERSDAADM sy-vline 
WA_J_7LM04_STR-ERZETADM sy-vline 
WA_J_7LM04_STR-ERNAMADM sy-vline 
WA_J_7LM04_STR-LAEDAADM sy-vline 
WA_J_7LM04_STR-AEZETADM sy-vline 
WA_J_7LM04_STR-AENAMADM sy-vline 
WA_J_7LM04_STR-LVORMADM sy-vline 
WA_J_7LM04_STR-ACTIVEPAC sy-vline      INTO ld_text SEPARATED BY SPACE.

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