ABAP Select data from SAP table J_3GBELP_M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3GBELP_M 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_3GBELP_M. 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_3GBELP_M 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_3GBELP_M TYPE STANDARD TABLE OF J_3GBELP_M,
      WA_J_3GBELP_M TYPE J_3GBELP_M,
      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_3GBELP_M> TYPE J_3GBELP_M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3GBELP_M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3GBELP_M
  INTO TABLE IT_J_3GBELP_M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3GBELP_M
*  INTO TABLE @DATA(IT_J_3GBELP_M2).
*--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_3GBELP_M INDEX 1 INTO DATA(WA_J_3GBELP_M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3GBELP_M ASSIGNING <J_3GBELP_M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3GBELP_M>-EQUNR = 1.
<J_3GBELP_M>-MATNR = 1.
<J_3GBELP_M>-PERNR = 1.
<J_3GBELP_M>-J_3GLVART = 1.
<J_3GBELP_M>-J_3GMENGE = 1.

ENDLOOP.

LOOP AT IT_J_3GBELP_M INTO WA_J_3GBELP_M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3GBELP_M-J_3GMEINS, sy-vline,
  WA_J_3GBELP_M-CHARGE, sy-vline,
  WA_J_3GBELP_M-J_3GEMP_CHARGE, sy-vline,
  WA_J_3GBELP_M-COMMENT1, sy-vline,
  WA_J_3GBELP_M-COMMENT2, sy-vline,
  WA_J_3GBELP_M-SLWID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3GBELP_M 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_3GBELP_M 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_3GBELP_M INTO WA_J_3GBELP_M.


*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 EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELP_M-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELP_M-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELP_M-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELP_M-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field J_3GMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELP_M-J_3GMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELP_M-J_3GMEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USE04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELP_M-USE04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELP_M-USE04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field USE05
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELP_M-USE05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELP_M-USE05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field /SAPCEM/BDNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3GBELP_M-/SAPCEM/BDNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3GBELP_M-/SAPCEM/BDNUM.
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_3GBELP_M_STR, 
EQUNR TYPE STRING,
MATNR TYPE STRING,
PERNR TYPE STRING,
J_3GLVART TYPE STRING,
J_3GMENGE TYPE STRING,
J_3GMEINS TYPE STRING,
CHARGE TYPE STRING,
J_3GEMP_CHARGE TYPE STRING,
COMMENT1 TYPE STRING,
COMMENT2 TYPE STRING,
SLWID TYPE STRING,
USR00 TYPE STRING,
USR01 TYPE STRING,
USR02 TYPE STRING,
USR03 TYPE STRING,
USR04 TYPE STRING,
USE04 TYPE STRING,
USR05 TYPE STRING,
USE05 TYPE STRING,
USR06 TYPE STRING,
USE06 TYPE STRING,
USR07 TYPE STRING,
USE07 TYPE STRING,
USR08 TYPE STRING,
USR09 TYPE STRING,
USR10 TYPE STRING,
USR11 TYPE STRING,
/SAPCEM/BDNUM TYPE STRING,
/SAPCEM/BDPOS TYPE STRING,
/SAPCEM/BDEND TYPE STRING,
/SAPCEM/BDENDU TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3GBELP_M_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_3GBELP_M_STR-EQUNR sy-vline 
WA_J_3GBELP_M_STR-MATNR sy-vline 
WA_J_3GBELP_M_STR-PERNR sy-vline 
WA_J_3GBELP_M_STR-J_3GLVART sy-vline 
WA_J_3GBELP_M_STR-J_3GMENGE sy-vline 
WA_J_3GBELP_M_STR-J_3GMEINS sy-vline 
WA_J_3GBELP_M_STR-CHARGE sy-vline 
WA_J_3GBELP_M_STR-J_3GEMP_CHARGE sy-vline 
WA_J_3GBELP_M_STR-COMMENT1 sy-vline 
WA_J_3GBELP_M_STR-COMMENT2 sy-vline 
WA_J_3GBELP_M_STR-SLWID sy-vline 
WA_J_3GBELP_M_STR-USR00 sy-vline 
WA_J_3GBELP_M_STR-USR01 sy-vline 
WA_J_3GBELP_M_STR-USR02 sy-vline 
WA_J_3GBELP_M_STR-USR03 sy-vline 
WA_J_3GBELP_M_STR-USR04 sy-vline 
WA_J_3GBELP_M_STR-USE04 sy-vline 
WA_J_3GBELP_M_STR-USR05 sy-vline 
WA_J_3GBELP_M_STR-USE05 sy-vline 
WA_J_3GBELP_M_STR-USR06 sy-vline 
WA_J_3GBELP_M_STR-USE06 sy-vline 
WA_J_3GBELP_M_STR-USR07 sy-vline 
WA_J_3GBELP_M_STR-USE07 sy-vline 
WA_J_3GBELP_M_STR-USR08 sy-vline 
WA_J_3GBELP_M_STR-USR09 sy-vline 
WA_J_3GBELP_M_STR-USR10 sy-vline 
WA_J_3GBELP_M_STR-USR11 sy-vline 
WA_J_3GBELP_M_STR-/SAPCEM/BDNUM sy-vline 
WA_J_3GBELP_M_STR-/SAPCEM/BDPOS sy-vline 
WA_J_3GBELP_M_STR-/SAPCEM/BDEND sy-vline 
WA_J_3GBELP_M_STR-/SAPCEM/BDENDU sy-vline 
WA_J_3GBELP_M_STR-RSNUM sy-vline 
WA_J_3GBELP_M_STR-RSPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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