ABAP Select data from SAP table /CEEIS/RUO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /CEEIS/RUO
*  INTO TABLE @DATA(IT_/CEEIS/RUO2).
*--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_/CEEIS/RUO INDEX 1 INTO DATA(WA_/CEEIS/RUO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</CEEIS/RUO>-MANDT = 1.
</CEEIS/RUO>-OBJNR = 1.
</CEEIS/RUO>-DATIV = 1.
</CEEIS/RUO>-DATIB = 1.
</CEEIS/RUO>-DATPV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/CEEIS/RUO-DATPB, sy-vline,
  WA_/CEEIS/RUO-BUKRS, sy-vline,
  WA_/CEEIS/RUO-ACCT, sy-vline,
  WA_/CEEIS/RUO-BUSA, sy-vline,
  WA_/CEEIS/RUO-CNTR, sy-vline,
  WA_/CEEIS/RUO-FAREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/CEEIS/RUO 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_/CEEIS/RUO 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_/CEEIS/RUO INTO WA_/CEEIS/RUO.


*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 ACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/CEEIS/RUO-ACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CEEIS/RUO-ACCT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field LOB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/CEEIS/RUO-LOB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/CEEIS/RUO-LOB.
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_/CEEIS/RUO_STR, 
MANDT TYPE STRING,
OBJNR TYPE STRING,
DATIV TYPE STRING,
DATIB TYPE STRING,
DATPV TYPE STRING,
DATPB TYPE STRING,
BUKRS TYPE STRING,
ACCT TYPE STRING,
BUSA TYPE STRING,
CNTR TYPE STRING,
FAREA TYPE STRING,
ACGR TYPE STRING,
INSTYPE TYPE STRING,
LOB TYPE STRING,
ACQ TYPE STRING,
UWQ TYPE STRING,
CNTRE TYPE STRING,
TTYPE TYPE STRING,
REGROUP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/CEEIS/RUO_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_/CEEIS/RUO_STR-MANDT sy-vline 
WA_/CEEIS/RUO_STR-OBJNR sy-vline 
WA_/CEEIS/RUO_STR-DATIV sy-vline 
WA_/CEEIS/RUO_STR-DATIB sy-vline 
WA_/CEEIS/RUO_STR-DATPV sy-vline 
WA_/CEEIS/RUO_STR-DATPB sy-vline 
WA_/CEEIS/RUO_STR-BUKRS sy-vline 
WA_/CEEIS/RUO_STR-ACCT sy-vline 
WA_/CEEIS/RUO_STR-BUSA sy-vline 
WA_/CEEIS/RUO_STR-CNTR sy-vline 
WA_/CEEIS/RUO_STR-FAREA sy-vline 
WA_/CEEIS/RUO_STR-ACGR sy-vline 
WA_/CEEIS/RUO_STR-INSTYPE sy-vline 
WA_/CEEIS/RUO_STR-LOB sy-vline 
WA_/CEEIS/RUO_STR-ACQ sy-vline 
WA_/CEEIS/RUO_STR-UWQ sy-vline 
WA_/CEEIS/RUO_STR-CNTRE sy-vline 
WA_/CEEIS/RUO_STR-TTYPE sy-vline 
WA_/CEEIS/RUO_STR-REGROUP sy-vline      INTO ld_text SEPARATED BY SPACE.

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