ABAP Select data from SAP table U_12550 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_12550 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 U_12550. 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 U_12550 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_U_12550 TYPE STANDARD TABLE OF U_12550,
      WA_U_12550 TYPE U_12550,
      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: <U_12550> TYPE U_12550.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_12550.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_12550
  INTO TABLE IT_U_12550.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_12550
*  INTO TABLE @DATA(IT_U_125502).
*--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_U_12550 INDEX 1 INTO DATA(WA_U_125502).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_12550 ASSIGNING <U_12550>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_12550>-MANDT = 1.
<U_12550>-RLDNR = 1.
<U_12550>-LANGU = 1.
<U_12550>-GCURR = 1.
<U_12550>-CLASS = 1.

ENDLOOP.

LOOP AT IT_U_12550 INTO WA_U_12550.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_12550-TYP, sy-vline,
  WA_U_12550-TRCUR, sy-vline,
  WA_U_12550-LCCUR, sy-vline,
  WA_U_12550-RCCUR, sy-vline,
  WA_U_12550-QUANT, sy-vline,
  WA_U_12550-ATQNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_12550 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_U_12550 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_U_12550 INTO WA_U_12550.


*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 RLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_12550-RLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12550-RLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_U_12550-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12550-LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_12550-DLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12550-DLDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KLDNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_12550-KLDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12550-KLDNR.
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_U_12550_STR, 
MANDT TYPE STRING,
RLDNR TYPE STRING,
LANGU TYPE STRING,
GCURR TYPE STRING,
CLASS TYPE STRING,
TYP TYPE STRING,
TRCUR TYPE STRING,
LCCUR TYPE STRING,
RCCUR TYPE STRING,
QUANT TYPE STRING,
ATQNT TYPE STRING,
TAB TYPE STRING,
RCOPY TYPE STRING,
SHKZ TYPE STRING,
GLSIP TYPE STRING,
VORTRAG TYPE STRING,
DLDNR TYPE STRING,
XDLDNR TYPE STRING,
CURT1 TYPE STRING,
CURT2 TYPE STRING,
V2POST TYPE STRING,
LCTYP TYPE STRING,
FIX TYPE STRING,
POST TYPE STRING,
ROLLUP TYPE STRING,
DEPLD TYPE STRING,
APPL TYPE STRING,
SUBAPPL TYPE STRING,
KOMP TYPE STRING,
GZLEDGER TYPE STRING,
KLDNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_12550_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_U_12550_STR-MANDT sy-vline 
WA_U_12550_STR-RLDNR sy-vline 
WA_U_12550_STR-LANGU sy-vline 
WA_U_12550_STR-GCURR sy-vline 
WA_U_12550_STR-CLASS sy-vline 
WA_U_12550_STR-TYP sy-vline 
WA_U_12550_STR-TRCUR sy-vline 
WA_U_12550_STR-LCCUR sy-vline 
WA_U_12550_STR-RCCUR sy-vline 
WA_U_12550_STR-QUANT sy-vline 
WA_U_12550_STR-ATQNT sy-vline 
WA_U_12550_STR-TAB sy-vline 
WA_U_12550_STR-RCOPY sy-vline 
WA_U_12550_STR-SHKZ sy-vline 
WA_U_12550_STR-GLSIP sy-vline 
WA_U_12550_STR-VORTRAG sy-vline 
WA_U_12550_STR-DLDNR sy-vline 
WA_U_12550_STR-XDLDNR sy-vline 
WA_U_12550_STR-CURT1 sy-vline 
WA_U_12550_STR-CURT2 sy-vline 
WA_U_12550_STR-V2POST sy-vline 
WA_U_12550_STR-LCTYP sy-vline 
WA_U_12550_STR-FIX sy-vline 
WA_U_12550_STR-POST sy-vline 
WA_U_12550_STR-ROLLUP sy-vline 
WA_U_12550_STR-DEPLD sy-vline 
WA_U_12550_STR-APPL sy-vline 
WA_U_12550_STR-SUBAPPL sy-vline 
WA_U_12550_STR-KOMP sy-vline 
WA_U_12550_STR-GZLEDGER sy-vline 
WA_U_12550_STR-KLDNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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