ABAP Select data from SAP table SLLNACH4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP SLLNACH4 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 SLLNACH4. 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 SLLNACH4 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_SLLNACH4 TYPE STANDARD TABLE OF SLLNACH4,
      WA_SLLNACH4 TYPE SLLNACH4,
      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: <SLLNACH4> TYPE SLLNACH4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_SLLNACH4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM SLLNACH4
  INTO TABLE IT_SLLNACH4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SLLNACH4
*  INTO TABLE @DATA(IT_SLLNACH42).
*--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_SLLNACH4 INDEX 1 INTO DATA(WA_SLLNACH42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_SLLNACH4 ASSIGNING <SLLNACH4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SLLNACH4>-SELKZ = 1.
<SLLNACH4>-LGPLA = 1.
<SLLNACH4>-MATNR = 1.
<SLLNACH4>-LPLTB = 1.
<SLLNACH4>-OFMNG = 1.

ENDLOOP.

LOOP AT IT_SLLNACH4 INTO WA_SLLNACH4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SLLNACH4-NON_ZERO, sy-vline,
  WA_SLLNACH4-MEINS, sy-vline,
  WA_SLLNACH4-ECODE, sy-vline,
  WA_SLLNACH4-VERME, sy-vline,
  WA_SLLNACH4-EINME, sy-vline,
  WA_SLLNACH4-TBOFF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SLLNACH4 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_SLLNACH4 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_SLLNACH4 INTO WA_SLLNACH4.


*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_SLLNACH4-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS2
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS3
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS4
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS4
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS4.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS5
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS5
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS5.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS6
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_SLLNACH4-MEINS6
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_SLLNACH4-MEINS6.
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_SLLNACH4_STR, 
SELKZ TYPE STRING,
LGPLA TYPE STRING,
MATNR TYPE STRING,
LPLTB TYPE STRING,
OFMNG TYPE STRING,
NON_ZERO TYPE STRING,
MEINS TYPE STRING,
ECODE TYPE STRING,
VERME TYPE STRING,
EINME TYPE STRING,
TBOFF TYPE STRING,
LPMAX TYPE STRING,
LPMIN TYPE STRING,
NSMNG TYPE STRING,
MEINS1 TYPE STRING,
MEINS2 TYPE STRING,
MEINS3 TYPE STRING,
MEINS4 TYPE STRING,
MEINS5 TYPE STRING,
MEINS6 TYPE STRING,
SGT_SCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SLLNACH4_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_SLLNACH4_STR-SELKZ sy-vline 
WA_SLLNACH4_STR-LGPLA sy-vline 
WA_SLLNACH4_STR-MATNR sy-vline 
WA_SLLNACH4_STR-LPLTB sy-vline 
WA_SLLNACH4_STR-OFMNG sy-vline 
WA_SLLNACH4_STR-NON_ZERO sy-vline 
WA_SLLNACH4_STR-MEINS sy-vline 
WA_SLLNACH4_STR-ECODE sy-vline 
WA_SLLNACH4_STR-VERME sy-vline 
WA_SLLNACH4_STR-EINME sy-vline 
WA_SLLNACH4_STR-TBOFF sy-vline 
WA_SLLNACH4_STR-LPMAX sy-vline 
WA_SLLNACH4_STR-LPMIN sy-vline 
WA_SLLNACH4_STR-NSMNG sy-vline 
WA_SLLNACH4_STR-MEINS1 sy-vline 
WA_SLLNACH4_STR-MEINS2 sy-vline 
WA_SLLNACH4_STR-MEINS3 sy-vline 
WA_SLLNACH4_STR-MEINS4 sy-vline 
WA_SLLNACH4_STR-MEINS5 sy-vline 
WA_SLLNACH4_STR-MEINS6 sy-vline 
WA_SLLNACH4_STR-SGT_SCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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