ABAP Select data from SAP table REHOVIAKPARA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REHOVIAKPARA
*  INTO TABLE @DATA(IT_REHOVIAKPARA2).
*--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_REHOVIAKPARA INDEX 1 INTO DATA(WA_REHOVIAKPARA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REHOVIAKPARA>-IDENT = 1.
<REHOVIAKPARA>-DTABR = 1.
<REHOVIAKPARA>-VVABBL = 1.
<REHOVIAKPARA>-BUKRS = 1.
<REHOVIAKPARA>-MANDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REHOVIAKPARA-SWENR, sy-vline,
  WA_REHOVIAKPARA-SNKSL, sy-vline,
  WA_REHOVIAKPARA-SEMPSL, sy-vline,
  WA_REHOVIAKPARA-DVONP, sy-vline,
  WA_REHOVIAKPARA-DBISP, sy-vline,
  WA_REHOVIAKPARA-SKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REHOVIAKPARA 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_REHOVIAKPARA 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_REHOVIAKPARA INTO WA_REHOVIAKPARA.


*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 MANDAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REHOVIAKPARA-MANDAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REHOVIAKPARA-MANDAT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_REHOVIAKPARA-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REHOVIAKPARA-SWENR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SEMPSL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REHOVIAKPARA-SEMPSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REHOVIAKPARA-SEMPSL.
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_REHOVIAKPARA_STR, 
IDENT TYPE STRING,
DTABR TYPE STRING,
VVABBL TYPE STRING,
BUKRS TYPE STRING,
MANDAT TYPE STRING,
SWENR TYPE STRING,
SNKSL TYPE STRING,
SEMPSL TYPE STRING,
DVONP TYPE STRING,
DBISP TYPE STRING,
SKEY TYPE STRING,
VVAE TYPE STRING,
BLDAT TYPE STRING,
BUDAT TYPE STRING,
MONAT TYPE STRING,
ZFBDT TYPE STRING,
SBLART TYPE STRING,
DBLART TYPE STRING,
BKTXT TYPE STRING,
JEXTR1 TYPE STRING,
JEXTR2 TYPE STRING,
JEXTR3 TYPE STRING,
PVWHON TYPE STRING,
PAUSFW TYPE STRING,
JEXTR0 TYPE STRING,
JVZOPN TYPE STRING,
JGUFO TYPE STRING,
RMSNKA TYPE STRING,
JANPVZ TYPE STRING,
VZMON TYPE STRING,
DGAB TYPE STRING,
BVZMIN TYPE STRING,
BVZERM TYPE STRING,
PERHVZ TYPE STRING,
SANPME TYPE STRING,
NOBSS TYPE STRING,
EAPP TYPE STRING,
VERSN TYPE STRING,
BKHKST TYPE STRING,
VVAEABR TYPE STRING,
EIGTABR TYPE STRING,
MIETABR TYPE STRING,
WIPLABR TYPE STRING,
SIMU TYPE STRING,
ABRE TYPE STRING,
BEKO TYPE STRING,
HEKO TYPE STRING,
BKHK TYPE STRING,
ABRSTAT TYPE STRING,
PLDTVON TYPE STRING,
PLDTBIS TYPE STRING,
WPDGAB TYPE STRING,
WPBVZMIN TYPE STRING,
WPBVZERM TYPE STRING,
WPPERHVZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REHOVIAKPARA_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_REHOVIAKPARA_STR-IDENT sy-vline 
WA_REHOVIAKPARA_STR-DTABR sy-vline 
WA_REHOVIAKPARA_STR-VVABBL sy-vline 
WA_REHOVIAKPARA_STR-BUKRS sy-vline 
WA_REHOVIAKPARA_STR-MANDAT sy-vline 
WA_REHOVIAKPARA_STR-SWENR sy-vline 
WA_REHOVIAKPARA_STR-SNKSL sy-vline 
WA_REHOVIAKPARA_STR-SEMPSL sy-vline 
WA_REHOVIAKPARA_STR-DVONP sy-vline 
WA_REHOVIAKPARA_STR-DBISP sy-vline 
WA_REHOVIAKPARA_STR-SKEY sy-vline 
WA_REHOVIAKPARA_STR-VVAE sy-vline 
WA_REHOVIAKPARA_STR-BLDAT sy-vline 
WA_REHOVIAKPARA_STR-BUDAT sy-vline 
WA_REHOVIAKPARA_STR-MONAT sy-vline 
WA_REHOVIAKPARA_STR-ZFBDT sy-vline 
WA_REHOVIAKPARA_STR-SBLART sy-vline 
WA_REHOVIAKPARA_STR-DBLART sy-vline 
WA_REHOVIAKPARA_STR-BKTXT sy-vline 
WA_REHOVIAKPARA_STR-JEXTR1 sy-vline 
WA_REHOVIAKPARA_STR-JEXTR2 sy-vline 
WA_REHOVIAKPARA_STR-JEXTR3 sy-vline 
WA_REHOVIAKPARA_STR-PVWHON sy-vline 
WA_REHOVIAKPARA_STR-PAUSFW sy-vline 
WA_REHOVIAKPARA_STR-JEXTR0 sy-vline 
WA_REHOVIAKPARA_STR-JVZOPN sy-vline 
WA_REHOVIAKPARA_STR-JGUFO sy-vline 
WA_REHOVIAKPARA_STR-RMSNKA sy-vline 
WA_REHOVIAKPARA_STR-JANPVZ sy-vline 
WA_REHOVIAKPARA_STR-VZMON sy-vline 
WA_REHOVIAKPARA_STR-DGAB sy-vline 
WA_REHOVIAKPARA_STR-BVZMIN sy-vline 
WA_REHOVIAKPARA_STR-BVZERM sy-vline 
WA_REHOVIAKPARA_STR-PERHVZ sy-vline 
WA_REHOVIAKPARA_STR-SANPME sy-vline 
WA_REHOVIAKPARA_STR-NOBSS sy-vline 
WA_REHOVIAKPARA_STR-EAPP sy-vline 
WA_REHOVIAKPARA_STR-VERSN sy-vline 
WA_REHOVIAKPARA_STR-BKHKST sy-vline 
WA_REHOVIAKPARA_STR-VVAEABR sy-vline 
WA_REHOVIAKPARA_STR-EIGTABR sy-vline 
WA_REHOVIAKPARA_STR-MIETABR sy-vline 
WA_REHOVIAKPARA_STR-WIPLABR sy-vline 
WA_REHOVIAKPARA_STR-SIMU sy-vline 
WA_REHOVIAKPARA_STR-ABRE sy-vline 
WA_REHOVIAKPARA_STR-BEKO sy-vline 
WA_REHOVIAKPARA_STR-HEKO sy-vline 
WA_REHOVIAKPARA_STR-BKHK sy-vline 
WA_REHOVIAKPARA_STR-ABRSTAT sy-vline 
WA_REHOVIAKPARA_STR-PLDTVON sy-vline 
WA_REHOVIAKPARA_STR-PLDTBIS sy-vline 
WA_REHOVIAKPARA_STR-WPDGAB sy-vline 
WA_REHOVIAKPARA_STR-WPBVZMIN sy-vline 
WA_REHOVIAKPARA_STR-WPBVZERM sy-vline 
WA_REHOVIAKPARA_STR-WPPERHVZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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