ABAP Select data from SAP table REVAL_CORP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REVAL_CORP
*  INTO TABLE @DATA(IT_REVAL_CORP2).
*--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_REVAL_CORP INDEX 1 INTO DATA(WA_REVAL_CORP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REVAL_CORP>-BUKRS = 1.
<REVAL_CORP>-RLDEPO = 1.
<REVAL_CORP>-NORDER = 1.
<REVAL_CORP>-RANL = 1.
<REVAL_CORP>-BNOMINAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REVAL_CORP-ASTUECK, sy-vline,
  WA_REVAL_CORP-SBWHR, sy-vline,
  WA_REVAL_CORP-SHWHR, sy-vline,
  WA_REVAL_CORP-BKAUFWR, sy-vline,
  WA_REVAL_CORP-BKAUFHW, sy-vline,
  WA_REVAL_CORP-BBUCHWR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REVAL_CORP 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_REVAL_CORP 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_REVAL_CORP INTO WA_REVAL_CORP.


*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 RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAL_CORP-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAL_CORP-RANL.
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_REVAL_CORP_STR, 
BUKRS TYPE STRING,
RLDEPO TYPE STRING,
NORDER TYPE STRING,
RANL TYPE STRING,
BNOMINAL TYPE STRING,
ASTUECK TYPE STRING,
SBWHR TYPE STRING,
SHWHR TYPE STRING,
BKAUFWR TYPE STRING,
BKAUFHW TYPE STRING,
BBUCHWR TYPE STRING,
BBUCHHW TYPE STRING,
BKOSTWR TYPE STRING,
BKOSTHW TYPE STRING,
BKSTBWR TYPE STRING,
BKSTBHW TYPE STRING,
BWPBWWR TYPE STRING,
BWPBWHW TYPE STRING,
BFWBWHW TYPE STRING,
BKOBWWR TYPE STRING,
BKOBWHW TYPE STRING,
BKOFBHW TYPE STRING,
DBEST6B TYPE STRING,
BAMT1WR TYPE STRING,
BAMT1HW TYPE STRING,
BAMT2WR TYPE STRING,
BAMT2HW TYPE STRING,
BAMT3WR TYPE STRING,
BAMT3HW TYPE STRING,
BAMT4WR TYPE STRING,
BAMT4HW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REVAL_CORP_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_REVAL_CORP_STR-BUKRS sy-vline 
WA_REVAL_CORP_STR-RLDEPO sy-vline 
WA_REVAL_CORP_STR-NORDER sy-vline 
WA_REVAL_CORP_STR-RANL sy-vline 
WA_REVAL_CORP_STR-BNOMINAL sy-vline 
WA_REVAL_CORP_STR-ASTUECK sy-vline 
WA_REVAL_CORP_STR-SBWHR sy-vline 
WA_REVAL_CORP_STR-SHWHR sy-vline 
WA_REVAL_CORP_STR-BKAUFWR sy-vline 
WA_REVAL_CORP_STR-BKAUFHW sy-vline 
WA_REVAL_CORP_STR-BBUCHWR sy-vline 
WA_REVAL_CORP_STR-BBUCHHW sy-vline 
WA_REVAL_CORP_STR-BKOSTWR sy-vline 
WA_REVAL_CORP_STR-BKOSTHW sy-vline 
WA_REVAL_CORP_STR-BKSTBWR sy-vline 
WA_REVAL_CORP_STR-BKSTBHW sy-vline 
WA_REVAL_CORP_STR-BWPBWWR sy-vline 
WA_REVAL_CORP_STR-BWPBWHW sy-vline 
WA_REVAL_CORP_STR-BFWBWHW sy-vline 
WA_REVAL_CORP_STR-BKOBWWR sy-vline 
WA_REVAL_CORP_STR-BKOBWHW sy-vline 
WA_REVAL_CORP_STR-BKOFBHW sy-vline 
WA_REVAL_CORP_STR-DBEST6B sy-vline 
WA_REVAL_CORP_STR-BAMT1WR sy-vline 
WA_REVAL_CORP_STR-BAMT1HW sy-vline 
WA_REVAL_CORP_STR-BAMT2WR sy-vline 
WA_REVAL_CORP_STR-BAMT2HW sy-vline 
WA_REVAL_CORP_STR-BAMT3WR sy-vline 
WA_REVAL_CORP_STR-BAMT3HW sy-vline 
WA_REVAL_CORP_STR-BAMT4WR sy-vline 
WA_REVAL_CORP_STR-BAMT4HW sy-vline      INTO ld_text SEPARATED BY SPACE.

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