ABAP Select data from SAP table DRAW_RFC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DRAW_RFC
*  INTO TABLE @DATA(IT_DRAW_RFC2).
*--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_DRAW_RFC INDEX 1 INTO DATA(WA_DRAW_RFC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DRAW_RFC>-DOKAR = 1.
<DRAW_RFC>-DOKNR = 1.
<DRAW_RFC>-DOKVR = 1.
<DRAW_RFC>-DOKTL = 1.
<DRAW_RFC>-DWNAM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DRAW_RFC-DOKST, sy-vline,
  WA_DRAW_RFC-PROTF, sy-vline,
  WA_DRAW_RFC-LABOR, sy-vline,
  WA_DRAW_RFC-AENNR, sy-vline,
  WA_DRAW_RFC-WERKA, sy-vline,
  WA_DRAW_RFC-LOEDK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DRAW_RFC 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_DRAW_RFC 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_DRAW_RFC INTO WA_DRAW_RFC.


*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 ALPHA, internal->external for field DOKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DRAW_RFC-DOKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DRAW_RFC-DOKNR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field DOKNR_VL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DRAW_RFC-DOKNR_VL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DRAW_RFC-DOKNR_VL.
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_DRAW_RFC_STR, 
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
DWNAM TYPE STRING,
DOKST TYPE STRING,
PROTF TYPE STRING,
LABOR TYPE STRING,
AENNR TYPE STRING,
WERKA TYPE STRING,
LOEDK TYPE STRING,
CADKZ TYPE STRING,
PRENR TYPE STRING,
PREVR TYPE STRING,
PRETL TYPE STRING,
PREAR TYPE STRING,
BEGRU TYPE STRING,
FILEP TYPE STRING,
DTTRG TYPE STRING,
DAPPL TYPE STRING,
FILEP1 TYPE STRING,
DTTRG1 TYPE STRING,
DAPPL1 TYPE STRING,
VRLDAT TYPE STRING,
VPRIOR TYPE STRING,
RES1 TYPE STRING,
RES2 TYPE STRING,
RES3 TYPE STRING,
RES4 TYPE STRING,
ADATUM TYPE STRING,
DOKNR_VL TYPE STRING,
DOKTL_VL TYPE STRING,
DOKVR_VL TYPE STRING,
DKTXT TYPE STRING,
PATHNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DRAW_RFC_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_DRAW_RFC_STR-DOKAR sy-vline 
WA_DRAW_RFC_STR-DOKNR sy-vline 
WA_DRAW_RFC_STR-DOKVR sy-vline 
WA_DRAW_RFC_STR-DOKTL sy-vline 
WA_DRAW_RFC_STR-DWNAM sy-vline 
WA_DRAW_RFC_STR-DOKST sy-vline 
WA_DRAW_RFC_STR-PROTF sy-vline 
WA_DRAW_RFC_STR-LABOR sy-vline 
WA_DRAW_RFC_STR-AENNR sy-vline 
WA_DRAW_RFC_STR-WERKA sy-vline 
WA_DRAW_RFC_STR-LOEDK sy-vline 
WA_DRAW_RFC_STR-CADKZ sy-vline 
WA_DRAW_RFC_STR-PRENR sy-vline 
WA_DRAW_RFC_STR-PREVR sy-vline 
WA_DRAW_RFC_STR-PRETL sy-vline 
WA_DRAW_RFC_STR-PREAR sy-vline 
WA_DRAW_RFC_STR-BEGRU sy-vline 
WA_DRAW_RFC_STR-FILEP sy-vline 
WA_DRAW_RFC_STR-DTTRG sy-vline 
WA_DRAW_RFC_STR-DAPPL sy-vline 
WA_DRAW_RFC_STR-FILEP1 sy-vline 
WA_DRAW_RFC_STR-DTTRG1 sy-vline 
WA_DRAW_RFC_STR-DAPPL1 sy-vline 
WA_DRAW_RFC_STR-VRLDAT sy-vline 
WA_DRAW_RFC_STR-VPRIOR sy-vline 
WA_DRAW_RFC_STR-RES1 sy-vline 
WA_DRAW_RFC_STR-RES2 sy-vline 
WA_DRAW_RFC_STR-RES3 sy-vline 
WA_DRAW_RFC_STR-RES4 sy-vline 
WA_DRAW_RFC_STR-ADATUM sy-vline 
WA_DRAW_RFC_STR-DOKNR_VL sy-vline 
WA_DRAW_RFC_STR-DOKTL_VL sy-vline 
WA_DRAW_RFC_STR-DOKVR_VL sy-vline 
WA_DRAW_RFC_STR-DKTXT sy-vline 
WA_DRAW_RFC_STR-PATHNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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