ABAP Select data from SAP table /J7L/LDE_HEADER into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /J7L/LDE_HEADER 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 /J7L/LDE_HEADER. 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 /J7L/LDE_HEADER 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_/J7L/LDE_HEADER TYPE STANDARD TABLE OF /J7L/LDE_HEADER,
      WA_/J7L/LDE_HEADER TYPE /J7L/LDE_HEADER,
      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: </J7L/LDE_HEADER> TYPE /J7L/LDE_HEADER.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/J7L/LDE_HEADER.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /J7L/LDE_HEADER
  INTO TABLE IT_/J7L/LDE_HEADER.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /J7L/LDE_HEADER
*  INTO TABLE @DATA(IT_/J7L/LDE_HEADER2).
*--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_/J7L/LDE_HEADER INDEX 1 INTO DATA(WA_/J7L/LDE_HEADER2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/J7L/LDE_HEADER ASSIGNING </J7L/LDE_HEADER>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</J7L/LDE_HEADER>-MATNR = 1.
</J7L/LDE_HEADER>-BUKRS = 1.
</J7L/LDE_HEADER>-LAND1 = 1.
</J7L/LDE_HEADER>-VRKME = 1.
</J7L/LDE_HEADER>-VARIANTE = 1.

ENDLOOP.

LOOP AT IT_/J7L/LDE_HEADER INTO WA_/J7L/LDE_HEADER.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/J7L/LDE_HEADER-DATAB, sy-vline,
  WA_/J7L/LDE_HEADER-DATBI, sy-vline,
  WA_/J7L/LDE_HEADER-MAKTX, sy-vline,
  WA_/J7L/LDE_HEADER-BASE_UOM, sy-vline,
  WA_/J7L/LDE_HEADER-MATL_TYPE, sy-vline,
  WA_/J7L/LDE_HEADER-MEVWX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/J7L/LDE_HEADER 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_/J7L/LDE_HEADER 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_/J7L/LDE_HEADER INTO WA_/J7L/LDE_HEADER.


*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_/J7L/LDE_HEADER-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASE_UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-BASE_UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-BASE_UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PRIM_VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-PRIM_VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-PRIM_VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-VOLEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MM_GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-MM_GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-MM_GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MM_VOLEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/J7L/LDE_HEADER-MM_VOLEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/J7L/LDE_HEADER-MM_VOLEH.
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_/J7L/LDE_HEADER_STR, 
MATNR TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
VRKME TYPE STRING,
VARIANTE TYPE STRING,
DATAB TYPE STRING,
DATBI TYPE STRING,
MAKTX TYPE STRING,
BASE_UOM TYPE STRING,
MATL_TYPE TYPE STRING,
MEVWX TYPE STRING,
MEREL TYPE STRING,
KPEIN TYPE STRING,
PRIM_VRKME TYPE STRING,
NTGEW TYPE STRING,
BRGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
MARM_TAB TYPE STRING,
MM_NTGEW TYPE STRING,
MM_BRGEW TYPE STRING,
MM_GEWEI TYPE STRING,
MM_VOLUM TYPE STRING,
MM_VOLEH 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,
ACTIVE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/J7L/LDE_HEADER_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_/J7L/LDE_HEADER_STR-MATNR sy-vline 
WA_/J7L/LDE_HEADER_STR-BUKRS sy-vline 
WA_/J7L/LDE_HEADER_STR-LAND1 sy-vline 
WA_/J7L/LDE_HEADER_STR-VRKME sy-vline 
WA_/J7L/LDE_HEADER_STR-VARIANTE sy-vline 
WA_/J7L/LDE_HEADER_STR-DATAB sy-vline 
WA_/J7L/LDE_HEADER_STR-DATBI sy-vline 
WA_/J7L/LDE_HEADER_STR-MAKTX sy-vline 
WA_/J7L/LDE_HEADER_STR-BASE_UOM sy-vline 
WA_/J7L/LDE_HEADER_STR-MATL_TYPE sy-vline 
WA_/J7L/LDE_HEADER_STR-MEVWX sy-vline 
WA_/J7L/LDE_HEADER_STR-MEREL sy-vline 
WA_/J7L/LDE_HEADER_STR-KPEIN sy-vline 
WA_/J7L/LDE_HEADER_STR-PRIM_VRKME sy-vline 
WA_/J7L/LDE_HEADER_STR-NTGEW sy-vline 
WA_/J7L/LDE_HEADER_STR-BRGEW sy-vline 
WA_/J7L/LDE_HEADER_STR-GEWEI sy-vline 
WA_/J7L/LDE_HEADER_STR-VOLUM sy-vline 
WA_/J7L/LDE_HEADER_STR-VOLEH sy-vline 
WA_/J7L/LDE_HEADER_STR-MARM_TAB sy-vline 
WA_/J7L/LDE_HEADER_STR-MM_NTGEW sy-vline 
WA_/J7L/LDE_HEADER_STR-MM_BRGEW sy-vline 
WA_/J7L/LDE_HEADER_STR-MM_GEWEI sy-vline 
WA_/J7L/LDE_HEADER_STR-MM_VOLUM sy-vline 
WA_/J7L/LDE_HEADER_STR-MM_VOLEH sy-vline 
WA_/J7L/LDE_HEADER_STR-DATABADM sy-vline 
WA_/J7L/LDE_HEADER_STR-DATBIADM sy-vline 
WA_/J7L/LDE_HEADER_STR-ERSDAADM sy-vline 
WA_/J7L/LDE_HEADER_STR-ERZETADM sy-vline 
WA_/J7L/LDE_HEADER_STR-ERNAMADM sy-vline 
WA_/J7L/LDE_HEADER_STR-LAEDAADM sy-vline 
WA_/J7L/LDE_HEADER_STR-AEZETADM sy-vline 
WA_/J7L/LDE_HEADER_STR-AENAMADM sy-vline 
WA_/J7L/LDE_HEADER_STR-LVORMADM sy-vline 
WA_/J7L/LDE_HEADER_STR-ACTIVE sy-vline      INTO ld_text SEPARATED BY SPACE.

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