ABAP Select data from SAP table J_7LAZAF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_7LAZAF 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_7LAZAF. 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_7LAZAF 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_7LAZAF TYPE STANDARD TABLE OF J_7LAZAF,
      WA_J_7LAZAF TYPE J_7LAZAF,
      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_7LAZAF> TYPE J_7LAZAF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_7LAZAF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_7LAZAF
  INTO TABLE IT_J_7LAZAF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_7LAZAF
*  INTO TABLE @DATA(IT_J_7LAZAF2).
*--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_7LAZAF INDEX 1 INTO DATA(WA_J_7LAZAF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_7LAZAF ASSIGNING <J_7LAZAF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_7LAZAF>-MANDT = 1.
<J_7LAZAF>-MATNR = 1.
<J_7LAZAF>-VARIANTE = 1.
<J_7LAZAF>-BUKRS = 1.
<J_7LAZAF>-LAND1 = 1.

ENDLOOP.

LOOP AT IT_J_7LAZAF INTO WA_J_7LAZAF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_7LAZAF-VRKME, sy-vline,
  WA_J_7LAZAF-VRPNR, sy-vline,
  WA_J_7LAZAF-VVARIANTE, sy-vline,
  WA_J_7LAZAF-DATABVRP, sy-vline,
  WA_J_7LAZAF-DATBIVRP, sy-vline,
  WA_J_7LAZAF-STOFF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_7LAZAF 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_7LAZAF 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_7LAZAF INTO WA_J_7LAZAF.


*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_7LAZAF-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field VRPNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-VRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-VRPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field GEWEI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-GEWEI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-GEWEI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN3, internal->external for field GSTFN
CALL FUNCTION 'CONVERSION_EXIT_MATN3_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-GSTFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-GSTFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field RMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-RMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-RMATN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-EAN11.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS_M04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-MEINS_M04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-MEINS_M04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS_VERP
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_7LAZAF-MEINS_VERP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_7LAZAF-MEINS_VERP.
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_7LAZAF_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
VARIANTE TYPE STRING,
BUKRS TYPE STRING,
LAND1 TYPE STRING,
VRKME TYPE STRING,
VRPNR TYPE STRING,
VVARIANTE TYPE STRING,
DATABVRP TYPE STRING,
DATBIVRP TYPE STRING,
STOFF TYPE STRING,
DATBI TYPE STRING,
DATAB TYPE STRING,
KPEIN TYPE STRING,
STGEW TYPE STRING,
GEWEI TYPE STRING,
STOKL TYPE STRING,
GSTFN TYPE STRING,
STOKTX TYPE STRING,
STOKTG TYPE STRING,
MAKTX TYPE STRING,
MAKTG TYPE STRING,
RMATN TYPE STRING,
AVARIANTE TYPE STRING,
EAN11 TYPE STRING,
MEINS_M04 TYPE STRING,
FMENG TYPE STRING,
DATBIVRPGR TYPE STRING,
DATABVRPGR TYPE STRING,
MEINS TYPE STRING,
MEINS_VERP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_7LAZAF_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_7LAZAF_STR-MANDT sy-vline 
WA_J_7LAZAF_STR-MATNR sy-vline 
WA_J_7LAZAF_STR-VARIANTE sy-vline 
WA_J_7LAZAF_STR-BUKRS sy-vline 
WA_J_7LAZAF_STR-LAND1 sy-vline 
WA_J_7LAZAF_STR-VRKME sy-vline 
WA_J_7LAZAF_STR-VRPNR sy-vline 
WA_J_7LAZAF_STR-VVARIANTE sy-vline 
WA_J_7LAZAF_STR-DATABVRP sy-vline 
WA_J_7LAZAF_STR-DATBIVRP sy-vline 
WA_J_7LAZAF_STR-STOFF sy-vline 
WA_J_7LAZAF_STR-DATBI sy-vline 
WA_J_7LAZAF_STR-DATAB sy-vline 
WA_J_7LAZAF_STR-KPEIN sy-vline 
WA_J_7LAZAF_STR-STGEW sy-vline 
WA_J_7LAZAF_STR-GEWEI sy-vline 
WA_J_7LAZAF_STR-STOKL sy-vline 
WA_J_7LAZAF_STR-GSTFN sy-vline 
WA_J_7LAZAF_STR-STOKTX sy-vline 
WA_J_7LAZAF_STR-STOKTG sy-vline 
WA_J_7LAZAF_STR-MAKTX sy-vline 
WA_J_7LAZAF_STR-MAKTG sy-vline 
WA_J_7LAZAF_STR-RMATN sy-vline 
WA_J_7LAZAF_STR-AVARIANTE sy-vline 
WA_J_7LAZAF_STR-EAN11 sy-vline 
WA_J_7LAZAF_STR-MEINS_M04 sy-vline 
WA_J_7LAZAF_STR-FMENG sy-vline 
WA_J_7LAZAF_STR-DATBIVRPGR sy-vline 
WA_J_7LAZAF_STR-DATABVRPGR sy-vline 
WA_J_7LAZAF_STR-MEINS sy-vline 
WA_J_7LAZAF_STR-MEINS_VERP sy-vline      INTO ld_text SEPARATED BY SPACE.

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