ABAP Select data from SAP table RETHI_DIS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RETHI_DIS
*  INTO TABLE @DATA(IT_RETHI_DIS2).
*--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_RETHI_DIS INDEX 1 INTO DATA(WA_RETHI_DIS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RETHI_DIS>-SERVICEID = 1.
<RETHI_DIS>-INVOICING_PARTY = 1.
<RETHI_DIS>-V_GROUP = 1.
<RETHI_DIS>-BPART = 1.
<RETHI_DIS>-AGGVK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RETHI_DIS-GPART, sy-vline,
  WA_RETHI_DIS-VKONT, sy-vline,
  WA_RETHI_DIS-OPBEL, sy-vline,
  WA_RETHI_DIS-BUKRS, sy-vline,
  WA_RETHI_DIS-THIDT, sy-vline,
  WA_RETHI_DIS-THIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RETHI_DIS 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_RETHI_DIS 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_RETHI_DIS INTO WA_RETHI_DIS.


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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field PRINTDOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RETHI_DIS-PRINTDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RETHI_DIS-PRINTDOC.
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_RETHI_DIS_STR, 
SERVICEID TYPE STRING,
INVOICING_PARTY TYPE STRING,
V_GROUP TYPE STRING,
BPART TYPE STRING,
AGGVK TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
OPBEL TYPE STRING,
BUKRS TYPE STRING,
THIDT TYPE STRING,
THIST TYPE STRING,
BCBLN TYPE STRING,
STORB TYPE STRING,
AGGRF TYPE STRING,
XPRDC TYPE STRING,
PRINTDOC TYPE STRING,
THPRD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RETHI_DIS_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_RETHI_DIS_STR-SERVICEID sy-vline 
WA_RETHI_DIS_STR-INVOICING_PARTY sy-vline 
WA_RETHI_DIS_STR-V_GROUP sy-vline 
WA_RETHI_DIS_STR-BPART sy-vline 
WA_RETHI_DIS_STR-AGGVK sy-vline 
WA_RETHI_DIS_STR-GPART sy-vline 
WA_RETHI_DIS_STR-VKONT sy-vline 
WA_RETHI_DIS_STR-OPBEL sy-vline 
WA_RETHI_DIS_STR-BUKRS sy-vline 
WA_RETHI_DIS_STR-THIDT sy-vline 
WA_RETHI_DIS_STR-THIST sy-vline 
WA_RETHI_DIS_STR-BCBLN sy-vline 
WA_RETHI_DIS_STR-STORB sy-vline 
WA_RETHI_DIS_STR-AGGRF sy-vline 
WA_RETHI_DIS_STR-XPRDC sy-vline 
WA_RETHI_DIS_STR-PRINTDOC sy-vline 
WA_RETHI_DIS_STR-THPRD sy-vline      INTO ld_text SEPARATED BY SPACE.

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