ABAP Select data from SAP table RCO54IF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RCO54IF 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 RCO54IF. 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 RCO54IF 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_RCO54IF TYPE STANDARD TABLE OF RCO54IF,
      WA_RCO54IF TYPE RCO54IF,
      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: <RCO54IF> TYPE RCO54IF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_RCO54IF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM RCO54IF
  INTO TABLE IT_RCO54IF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RCO54IF
*  INTO TABLE @DATA(IT_RCO54IF2).
*--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_RCO54IF INDEX 1 INTO DATA(WA_RCO54IF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_RCO54IF ASSIGNING <RCO54IF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RCO54IF>-WERK = 1.
<RCO54IF>-BID = 1.
<RCO54IF>-SOURCE = 1.
<RCO54IF>-STINIT = 1.
<RCO54IF>-STWTMP = 1.

ENDLOOP.

LOOP AT IT_RCO54IF INTO WA_RCO54IF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RCO54IF-STTEMP, sy-vline,
  WA_RCO54IF-STSEND, sy-vline,
  WA_RCO54IF-STWARN, sy-vline,
  WA_RCO54IF-STERRO, sy-vline,
  WA_RCO54IF-STDEST, sy-vline,
  WA_RCO54IF-STINCL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RCO54IF 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_RCO54IF 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_RCO54IF INTO WA_RCO54IF.


*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 BID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RCO54IF-BID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RCO54IF-BID.
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_RCO54IF_STR, 
WERK TYPE STRING,
BID TYPE STRING,
SOURCE TYPE STRING,
STINIT TYPE STRING,
STWTMP TYPE STRING,
STTEMP TYPE STRING,
STSEND TYPE STRING,
STWARN TYPE STRING,
STERRO TYPE STRING,
STDEST TYPE STRING,
STINCL TYPE STRING,
STALL TYPE STRING,
ABDAT TYPE STRING,
BISDAT TYPE STRING,
ABTME TYPE STRING,
BISTME TYPE STRING,
MSCLA TYPE STRING,
TSTKZ TYPE STRING,
NOTST TYPE STRING,
ALTST TYPE STRING,
MSAGE TYPE STRING,
LOGONLY TYPE STRING,
LOGWRIT TYPE STRING,
MAXSEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RCO54IF_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_RCO54IF_STR-WERK sy-vline 
WA_RCO54IF_STR-BID sy-vline 
WA_RCO54IF_STR-SOURCE sy-vline 
WA_RCO54IF_STR-STINIT sy-vline 
WA_RCO54IF_STR-STWTMP sy-vline 
WA_RCO54IF_STR-STTEMP sy-vline 
WA_RCO54IF_STR-STSEND sy-vline 
WA_RCO54IF_STR-STWARN sy-vline 
WA_RCO54IF_STR-STERRO sy-vline 
WA_RCO54IF_STR-STDEST sy-vline 
WA_RCO54IF_STR-STINCL sy-vline 
WA_RCO54IF_STR-STALL sy-vline 
WA_RCO54IF_STR-ABDAT sy-vline 
WA_RCO54IF_STR-BISDAT sy-vline 
WA_RCO54IF_STR-ABTME sy-vline 
WA_RCO54IF_STR-BISTME sy-vline 
WA_RCO54IF_STR-MSCLA sy-vline 
WA_RCO54IF_STR-TSTKZ sy-vline 
WA_RCO54IF_STR-NOTST sy-vline 
WA_RCO54IF_STR-ALTST sy-vline 
WA_RCO54IF_STR-MSAGE sy-vline 
WA_RCO54IF_STR-LOGONLY sy-vline 
WA_RCO54IF_STR-LOGWRIT sy-vline 
WA_RCO54IF_STR-MAXSEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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