ABAP Select data from SAP table RFC_MAT1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFC_MAT1 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 RFC_MAT1. 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 RFC_MAT1 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_RFC_MAT1 TYPE STANDARD TABLE OF RFC_MAT1,
      WA_RFC_MAT1 TYPE RFC_MAT1,
      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: <RFC_MAT1> TYPE RFC_MAT1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RFC_MAT1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RFC_MAT1
  INTO TABLE IT_RFC_MAT1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFC_MAT1
*  INTO TABLE @DATA(IT_RFC_MAT12).
*--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_RFC_MAT1 INDEX 1 INTO DATA(WA_RFC_MAT12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RFC_MAT1 ASSIGNING <RFC_MAT1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFC_MAT1>-MATNR = 1.
<RFC_MAT1>-VKORG = 1.
<RFC_MAT1>-VTWEG = 1.
<RFC_MAT1>-BWKEY = 1.
<RFC_MAT1>-BWTAR = 1.

ENDLOOP.

LOOP AT IT_RFC_MAT1 INTO WA_RFC_MAT1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFC_MAT1-WERKS, sy-vline,
  WA_RFC_MAT1-LGNUM, sy-vline,
  WA_RFC_MAT1-MAKTX, sy-vline,
  WA_RFC_MAT1-PRODH, sy-vline,
  WA_RFC_MAT1-LVOMA, sy-vline,
  WA_RFC_MAT1-MTART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFC_MAT1 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_RFC_MAT1 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_RFC_MAT1 INTO WA_RFC_MAT1.


*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_RFC_MAT1-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_MAT1-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN3, internal->external for field STOFF
CALL FUNCTION 'CONVERSION_EXIT_MATN3_OUTPUT'
  EXPORTING
    input =                      WA_RFC_MAT1-STOFF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_MAT1-STOFF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PMATN
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_RFC_MAT1-PMATN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFC_MAT1-PMATN.
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_RFC_MAT1_STR, 
MATNR TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
WERKS TYPE STRING,
LGNUM TYPE STRING,
MAKTX TYPE STRING,
PRODH TYPE STRING,
LVOMA TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
BISMT TYPE STRING,
GROES TYPE STRING,
WRKST TYPE STRING,
LABOR TYPE STRING,
STOFF TYPE STRING,
SPART TYPE STRING,
TRAGR TYPE STRING,
LVOVK TYPE STRING,
VERSG TYPE STRING,
BONUS TYPE STRING,
PROVG TYPE STRING,
PMATN TYPE STRING,
KONDM TYPE STRING,
KTGRM TYPE STRING,
LVOBA TYPE STRING,
BKLAS TYPE STRING,
BWTTY TYPE STRING,
MYPOL TYPE STRING,
LVOWK TYPE STRING,
MAABC TYPE STRING,
EKGRP TYPE STRING,
DISMM TYPE STRING,
DISPO TYPE STRING,
FEVOR TYPE STRING,
LADGR TYPE STRING,
LVOLN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFC_MAT1_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_RFC_MAT1_STR-MATNR sy-vline 
WA_RFC_MAT1_STR-VKORG sy-vline 
WA_RFC_MAT1_STR-VTWEG sy-vline 
WA_RFC_MAT1_STR-BWKEY sy-vline 
WA_RFC_MAT1_STR-BWTAR sy-vline 
WA_RFC_MAT1_STR-WERKS sy-vline 
WA_RFC_MAT1_STR-LGNUM sy-vline 
WA_RFC_MAT1_STR-MAKTX sy-vline 
WA_RFC_MAT1_STR-PRODH sy-vline 
WA_RFC_MAT1_STR-LVOMA sy-vline 
WA_RFC_MAT1_STR-MTART sy-vline 
WA_RFC_MAT1_STR-MATKL sy-vline 
WA_RFC_MAT1_STR-BISMT sy-vline 
WA_RFC_MAT1_STR-GROES sy-vline 
WA_RFC_MAT1_STR-WRKST sy-vline 
WA_RFC_MAT1_STR-LABOR sy-vline 
WA_RFC_MAT1_STR-STOFF sy-vline 
WA_RFC_MAT1_STR-SPART sy-vline 
WA_RFC_MAT1_STR-TRAGR sy-vline 
WA_RFC_MAT1_STR-LVOVK sy-vline 
WA_RFC_MAT1_STR-VERSG sy-vline 
WA_RFC_MAT1_STR-BONUS sy-vline 
WA_RFC_MAT1_STR-PROVG sy-vline 
WA_RFC_MAT1_STR-PMATN sy-vline 
WA_RFC_MAT1_STR-KONDM sy-vline 
WA_RFC_MAT1_STR-KTGRM sy-vline 
WA_RFC_MAT1_STR-LVOBA sy-vline 
WA_RFC_MAT1_STR-BKLAS sy-vline 
WA_RFC_MAT1_STR-BWTTY sy-vline 
WA_RFC_MAT1_STR-MYPOL sy-vline 
WA_RFC_MAT1_STR-LVOWK sy-vline 
WA_RFC_MAT1_STR-MAABC sy-vline 
WA_RFC_MAT1_STR-EKGRP sy-vline 
WA_RFC_MAT1_STR-DISMM sy-vline 
WA_RFC_MAT1_STR-DISPO sy-vline 
WA_RFC_MAT1_STR-FEVOR sy-vline 
WA_RFC_MAT1_STR-LADGR sy-vline 
WA_RFC_MAT1_STR-LVOLN sy-vline      INTO ld_text SEPARATED BY SPACE.

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