ABAP Select data from SAP table REHO_DBAND_KEY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REHO_DBAND_KEY
*  INTO TABLE @DATA(IT_REHO_DBAND_KEY2).
*--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_REHO_DBAND_KEY INDEX 1 INTO DATA(WA_REHO_DBAND_KEY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REHO_DBAND_KEY>-BUKRS = 1.
<REHO_DBAND_KEY>-SWENR = 1.
<REHO_DBAND_KEY>-SMENR = 1.
<REHO_DBAND_KEY>-SMIVE = 1.
<REHO_DBAND_KEY>-RECNNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REHO_DBAND_KEY-SNKS, sy-vline,
  WA_REHO_DBAND_KEY-MVSNKS, sy-vline,
  WA_REHO_DBAND_KEY-DTDAB, sy-vline,
  WA_REHO_DBAND_KEY-DTDBIS, sy-vline,
  WA_REHO_DBAND_KEY-ABREART, sy-vline,
  WA_REHO_DBAND_KEY-SKOART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REHO_DBAND_KEY 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_REHO_DBAND_KEY 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_REHO_DBAND_KEY INTO WA_REHO_DBAND_KEY.


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

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

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

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

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_REHO_DBAND_KEY-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REHO_DBAND_KEY-IMKEY.
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_REHO_DBAND_KEY_STR, 
BUKRS TYPE STRING,
SWENR TYPE STRING,
SMENR TYPE STRING,
SMIVE TYPE STRING,
RECNNR TYPE STRING,
SNKS TYPE STRING,
MVSNKS TYPE STRING,
DTDAB TYPE STRING,
DTDBIS TYPE STRING,
ABREART TYPE STRING,
SKOART TYPE STRING,
MWSKZ TYPE STRING,
SBEWART TYPE STRING,
JVSTOPT TYPE STRING,
IMKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REHO_DBAND_KEY_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_REHO_DBAND_KEY_STR-BUKRS sy-vline 
WA_REHO_DBAND_KEY_STR-SWENR sy-vline 
WA_REHO_DBAND_KEY_STR-SMENR sy-vline 
WA_REHO_DBAND_KEY_STR-SMIVE sy-vline 
WA_REHO_DBAND_KEY_STR-RECNNR sy-vline 
WA_REHO_DBAND_KEY_STR-SNKS sy-vline 
WA_REHO_DBAND_KEY_STR-MVSNKS sy-vline 
WA_REHO_DBAND_KEY_STR-DTDAB sy-vline 
WA_REHO_DBAND_KEY_STR-DTDBIS sy-vline 
WA_REHO_DBAND_KEY_STR-ABREART sy-vline 
WA_REHO_DBAND_KEY_STR-SKOART sy-vline 
WA_REHO_DBAND_KEY_STR-MWSKZ sy-vline 
WA_REHO_DBAND_KEY_STR-SBEWART sy-vline 
WA_REHO_DBAND_KEY_STR-JVSTOPT sy-vline 
WA_REHO_DBAND_KEY_STR-IMKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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