ABAP Select data from SAP table FMUDBSEGH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMUDBSEGH
*  INTO TABLE @DATA(IT_FMUDBSEGH2).
*--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_FMUDBSEGH INDEX 1 INTO DATA(WA_FMUDBSEGH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMUDBSEGH>-MANDT = 1.
<FMUDBSEGH>-FIBELNR = 1.
<FMUDBSEGH>-FIBUKRS = 1.
<FMUDBSEGH>-FIGJAHR = 1.
<FMUDBSEGH>-FIBUZEI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMUDBSEGH-RFIPOS, sy-vline,
  WA_FMUDBSEGH-RFICTR, sy-vline,
  WA_FMUDBSEGH-RFONDS, sy-vline,
  WA_FMUDBSEGH-RFAREA, sy-vline,
  WA_FMUDBSEGH-RESTHMK, sy-vline,
  WA_FMUDBSEGH-BUART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMUDBSEGH 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_FMUDBSEGH 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_FMUDBSEGH INTO WA_FMUDBSEGH.


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

*Conversion exit GJAHR, internal->external for field FIGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMUDBSEGH-FIGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMUDBSEGH-FIGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field RFIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_FMUDBSEGH-RFIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMUDBSEGH-RFIPOS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit FMCIS, internal->external for field INCFIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_FMUDBSEGH-INCFIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMUDBSEGH-INCFIPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field BGGJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FMUDBSEGH-BGGJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMUDBSEGH-BGGJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field OLDFIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_FMUDBSEGH-OLDFIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMUDBSEGH-OLDFIPOS.
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_FMUDBSEGH_STR, 
MANDT TYPE STRING,
FIBELNR TYPE STRING,
FIBUKRS TYPE STRING,
FIGJAHR TYPE STRING,
FIBUZEI TYPE STRING,
RFIPOS TYPE STRING,
RFICTR TYPE STRING,
RFONDS TYPE STRING,
RFAREA TYPE STRING,
RESTHMK TYPE STRING,
BUART TYPE STRING,
INCFIPOS TYPE STRING,
INCFICTR TYPE STRING,
INCFONDS TYPE STRING,
INCFAREA TYPE STRING,
FIKRS TYPE STRING,
BGGJAHR TYPE STRING,
BGPERIO TYPE STRING,
WRBTR TYPE STRING,
TWAER TYPE STRING,
ERHPROZ TYPE STRING,
ERHBTR TYPE STRING,
SUMBGBTR TYPE STRING,
OLDFIPOS TYPE STRING,
OLDFICTR TYPE STRING,
OLDFONDS TYPE STRING,
STATUS TYPE STRING,
DATAB TYPE STRING,
OLDFAREA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMUDBSEGH_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_FMUDBSEGH_STR-MANDT sy-vline 
WA_FMUDBSEGH_STR-FIBELNR sy-vline 
WA_FMUDBSEGH_STR-FIBUKRS sy-vline 
WA_FMUDBSEGH_STR-FIGJAHR sy-vline 
WA_FMUDBSEGH_STR-FIBUZEI sy-vline 
WA_FMUDBSEGH_STR-RFIPOS sy-vline 
WA_FMUDBSEGH_STR-RFICTR sy-vline 
WA_FMUDBSEGH_STR-RFONDS sy-vline 
WA_FMUDBSEGH_STR-RFAREA sy-vline 
WA_FMUDBSEGH_STR-RESTHMK sy-vline 
WA_FMUDBSEGH_STR-BUART sy-vline 
WA_FMUDBSEGH_STR-INCFIPOS sy-vline 
WA_FMUDBSEGH_STR-INCFICTR sy-vline 
WA_FMUDBSEGH_STR-INCFONDS sy-vline 
WA_FMUDBSEGH_STR-INCFAREA sy-vline 
WA_FMUDBSEGH_STR-FIKRS sy-vline 
WA_FMUDBSEGH_STR-BGGJAHR sy-vline 
WA_FMUDBSEGH_STR-BGPERIO sy-vline 
WA_FMUDBSEGH_STR-WRBTR sy-vline 
WA_FMUDBSEGH_STR-TWAER sy-vline 
WA_FMUDBSEGH_STR-ERHPROZ sy-vline 
WA_FMUDBSEGH_STR-ERHBTR sy-vline 
WA_FMUDBSEGH_STR-SUMBGBTR sy-vline 
WA_FMUDBSEGH_STR-OLDFIPOS sy-vline 
WA_FMUDBSEGH_STR-OLDFICTR sy-vline 
WA_FMUDBSEGH_STR-OLDFONDS sy-vline 
WA_FMUDBSEGH_STR-STATUS sy-vline 
WA_FMUDBSEGH_STR-DATAB sy-vline 
WA_FMUDBSEGH_STR-OLDFAREA sy-vline      INTO ld_text SEPARATED BY SPACE.

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