ABAP Select data from SAP table RHCD_TAB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RHCD_TAB
*  INTO TABLE @DATA(IT_RHCD_TAB2).
*--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_RHCD_TAB INDEX 1 INTO DATA(WA_RHCD_TAB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RHCD_TAB>-MARK = 1.
<RHCD_TAB>-BUKRS = 1.
<RHCD_TAB>-GSBER = 1.
<RHCD_TAB>-FIKRS = 1.
<RHCD_TAB>-KOKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RHCD_TAB-ROTYPE, sy-vline,
  WA_RHCD_TAB-KOSTL, sy-vline,
  WA_RHCD_TAB-AUFNR, sy-vline,
  WA_RHCD_TAB-POSNR, sy-vline,
  WA_RHCD_TAB-COOBJ_TEXT1, sy-vline,
  WA_RHCD_TAB-COOBJ_TEXT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RHCD_TAB 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_RHCD_TAB 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_RHCD_TAB INTO WA_RHCD_TAB.


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

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

*Conversion exit ABPSP, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_RHCD_TAB-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RHCD_TAB-POSNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SGMNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RHCD_TAB-SGMNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RHCD_TAB-SGMNT.
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_RHCD_TAB_STR, 
MARK TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
FIKRS TYPE STRING,
KOKRS TYPE STRING,
ROTYPE TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
POSNR TYPE STRING,
COOBJ_TEXT1 TYPE STRING,
COOBJ_TEXT2 TYPE STRING,
FINCODE TYPE STRING,
FONDSTEXT TYPE STRING,
FISTL TYPE STRING,
FISTLTEXT TYPE STRING,
FKBER TYPE STRING,
GRANT_NBR TYPE STRING,
DART TYPE STRING,
UDART TYPE STRING,
PROZT TYPE STRING,
ERRFLG TYPE STRING,
SGMNT TYPE STRING,
BUDGET_PD TYPE STRING,
BUDGET_PD_NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RHCD_TAB_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_RHCD_TAB_STR-MARK sy-vline 
WA_RHCD_TAB_STR-BUKRS sy-vline 
WA_RHCD_TAB_STR-GSBER sy-vline 
WA_RHCD_TAB_STR-FIKRS sy-vline 
WA_RHCD_TAB_STR-KOKRS sy-vline 
WA_RHCD_TAB_STR-ROTYPE sy-vline 
WA_RHCD_TAB_STR-KOSTL sy-vline 
WA_RHCD_TAB_STR-AUFNR sy-vline 
WA_RHCD_TAB_STR-POSNR sy-vline 
WA_RHCD_TAB_STR-COOBJ_TEXT1 sy-vline 
WA_RHCD_TAB_STR-COOBJ_TEXT2 sy-vline 
WA_RHCD_TAB_STR-FINCODE sy-vline 
WA_RHCD_TAB_STR-FONDSTEXT sy-vline 
WA_RHCD_TAB_STR-FISTL sy-vline 
WA_RHCD_TAB_STR-FISTLTEXT sy-vline 
WA_RHCD_TAB_STR-FKBER sy-vline 
WA_RHCD_TAB_STR-GRANT_NBR sy-vline 
WA_RHCD_TAB_STR-DART sy-vline 
WA_RHCD_TAB_STR-UDART sy-vline 
WA_RHCD_TAB_STR-PROZT sy-vline 
WA_RHCD_TAB_STR-ERRFLG sy-vline 
WA_RHCD_TAB_STR-SGMNT sy-vline 
WA_RHCD_TAB_STR-BUDGET_PD sy-vline 
WA_RHCD_TAB_STR-BUDGET_PD_NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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