ABAP Select data from SAP table /ISDFPS/ST_REL_LFB_MAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /ISDFPS/ST_REL_LFB_MAT
*  INTO TABLE @DATA(IT_/ISDFPS/ST_REL_LFB_MAT2).
*--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_/ISDFPS/ST_REL_LFB_MAT INDEX 1 INTO DATA(WA_/ISDFPS/ST_REL_LFB_MAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</ISDFPS/ST_REL_LFB_MAT>-PNGUID = 1.
</ISDFPS/ST_REL_LFB_MAT>-FORCEM_CNT = 1.
</ISDFPS/ST_REL_LFB_MAT>-PNAME = 1.
</ISDFPS/ST_REL_LFB_MAT>-PNTEXT = 1.
</ISDFPS/ST_REL_LFB_MAT>-PNTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/ISDFPS/ST_REL_LFB_MAT-PNTYPE_AS_ICON, sy-vline,
  WA_/ISDFPS/ST_REL_LFB_MAT-MATNR, sy-vline,
  WA_/ISDFPS/ST_REL_LFB_MAT-MAKTX, sy-vline,
  WA_/ISDFPS/ST_REL_LFB_MAT-EQUNR, sy-vline,
  WA_/ISDFPS/ST_REL_LFB_MAT-SERNR, sy-vline,
  WA_/ISDFPS/ST_REL_LFB_MAT-BATCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/ISDFPS/ST_REL_LFB_MAT 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_/ISDFPS/ST_REL_LFB_MAT 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_/ISDFPS/ST_REL_LFB_MAT INTO WA_/ISDFPS/ST_REL_LFB_MAT.


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

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/ST_REL_LFB_MAT-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/ST_REL_LFB_MAT-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field SERNR
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/ST_REL_LFB_MAT-SERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/ST_REL_LFB_MAT-SERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HU_EXID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/ISDFPS/ST_REL_LFB_MAT-HU_EXID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/ISDFPS/ST_REL_LFB_MAT-HU_EXID.
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_/ISDFPS/ST_REL_LFB_MAT_STR, 
PNGUID TYPE STRING,
FORCEM_CNT TYPE STRING,
PNAME TYPE STRING,
PNTEXT TYPE STRING,
PNTYPE TYPE STRING,
PNTYPE_AS_ICON TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
EQUNR TYPE STRING,
SERNR TYPE STRING,
BATCH TYPE STRING,
TRAGR TYPE STRING,
EXTWG TYPE STRING,
MATKL TYPE STRING,
PROFL TYPE STRING,
MAGRV TYPE STRING,
LADGR TYPE STRING,
ITARK TYPE STRING,
HU_EXID TYPE STRING,
VEPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/ISDFPS/ST_REL_LFB_MAT_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_/ISDFPS/ST_REL_LFB_MAT_STR-PNGUID sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-FORCEM_CNT sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-PNAME sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-PNTEXT sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-PNTYPE sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-PNTYPE_AS_ICON sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-MATNR sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-MAKTX sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-EQUNR sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-SERNR sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-BATCH sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-TRAGR sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-EXTWG sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-MATKL sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-PROFL sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-MAGRV sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-LADGR sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-ITARK sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-HU_EXID sy-vline 
WA_/ISDFPS/ST_REL_LFB_MAT_STR-VEPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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