ABAP Select data from SAP table U_12448 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_12448 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_12448. 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_12448 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_12448 TYPE STANDARD TABLE OF U_12448,
      WA_U_12448 TYPE U_12448,
      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_12448> TYPE U_12448.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_12448.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_12448
  INTO TABLE IT_U_12448.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_12448
*  INTO TABLE @DATA(IT_U_124482).
*--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_12448 INDEX 1 INTO DATA(WA_U_124482).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_12448 ASSIGNING <U_12448>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_12448>-MANDT = 1.
<U_12448>-LEDNR = 1.
<U_12448>-OBJNR = 1.
<U_12448>-GJAHR = 1.
<U_12448>-PERBL = 1.

ENDLOOP.

LOOP AT IT_U_12448 INTO WA_U_12448.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_12448-WRTTP, sy-vline,
  WA_U_12448-VORGA, sy-vline,
  WA_U_12448-POSIT, sy-vline,
  WA_U_12448-TWAER, sy-vline,
  WA_U_12448-BUKRS, sy-vline,
  WA_U_12448-GSBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_12448 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_12448 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_12448 INTO WA_U_12448.


*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 NUMCV, internal->external for field LEDNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_U_12448-LEDNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12448-LEDNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_U_12448-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12448-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_12448-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_12448-WRTTP.
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_12448_STR, 
MANDT TYPE STRING,
LEDNR TYPE STRING,
OBJNR TYPE STRING,
GJAHR TYPE STRING,
PERBL TYPE STRING,
WRTTP TYPE STRING,
VORGA TYPE STRING,
POSIT TYPE STRING,
TWAER TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
ABLD01 TYPE STRING,
ABLD02 TYPE STRING,
ABLD03 TYPE STRING,
ABLD04 TYPE STRING,
ABLD05 TYPE STRING,
ABLD06 TYPE STRING,
ABLD07 TYPE STRING,
ABLD08 TYPE STRING,
ABLD09 TYPE STRING,
ABLD10 TYPE STRING,
ABLD11 TYPE STRING,
ABLD12 TYPE STRING,
ABLD13 TYPE STRING,
ABLD14 TYPE STRING,
ABLD15 TYPE STRING,
ABLD16 TYPE STRING,
EBLD01 TYPE STRING,
EBLD02 TYPE STRING,
EBLD03 TYPE STRING,
EBLD04 TYPE STRING,
EBLD05 TYPE STRING,
EBLD06 TYPE STRING,
EBLD07 TYPE STRING,
EBLD08 TYPE STRING,
EBLD09 TYPE STRING,
EBLD10 TYPE STRING,
EBLD11 TYPE STRING,
EBLD12 TYPE STRING,
EBLD13 TYPE STRING,
EBLD14 TYPE STRING,
EBLD15 TYPE STRING,
EBLD16 TYPE STRING,
ABTR01 TYPE STRING,
ABTR02 TYPE STRING,
ABTR03 TYPE STRING,
ABTR04 TYPE STRING,
ABTR05 TYPE STRING,
ABTR06 TYPE STRING,
ABTR07 TYPE STRING,
ABTR08 TYPE STRING,
ABTR09 TYPE STRING,
ABTR10 TYPE STRING,
ABTR11 TYPE STRING,
ABTR12 TYPE STRING,
ABTR13 TYPE STRING,
ABTR14 TYPE STRING,
ABTR15 TYPE STRING,
ABTR16 TYPE STRING,
EBTR01 TYPE STRING,
EBTR02 TYPE STRING,
EBTR03 TYPE STRING,
EBTR04 TYPE STRING,
EBTR05 TYPE STRING,
EBTR06 TYPE STRING,
EBTR07 TYPE STRING,
EBTR08 TYPE STRING,
EBTR09 TYPE STRING,
EBTR10 TYPE STRING,
EBTR11 TYPE STRING,
EBTR12 TYPE STRING,
EBTR13 TYPE STRING,
EBTR14 TYPE STRING,
EBTR15 TYPE STRING,
EBTR16 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_12448_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_12448_STR-MANDT sy-vline 
WA_U_12448_STR-LEDNR sy-vline 
WA_U_12448_STR-OBJNR sy-vline 
WA_U_12448_STR-GJAHR sy-vline 
WA_U_12448_STR-PERBL sy-vline 
WA_U_12448_STR-WRTTP sy-vline 
WA_U_12448_STR-VORGA sy-vline 
WA_U_12448_STR-POSIT sy-vline 
WA_U_12448_STR-TWAER sy-vline 
WA_U_12448_STR-BUKRS sy-vline 
WA_U_12448_STR-GSBER sy-vline 
WA_U_12448_STR-ABLD01 sy-vline 
WA_U_12448_STR-ABLD02 sy-vline 
WA_U_12448_STR-ABLD03 sy-vline 
WA_U_12448_STR-ABLD04 sy-vline 
WA_U_12448_STR-ABLD05 sy-vline 
WA_U_12448_STR-ABLD06 sy-vline 
WA_U_12448_STR-ABLD07 sy-vline 
WA_U_12448_STR-ABLD08 sy-vline 
WA_U_12448_STR-ABLD09 sy-vline 
WA_U_12448_STR-ABLD10 sy-vline 
WA_U_12448_STR-ABLD11 sy-vline 
WA_U_12448_STR-ABLD12 sy-vline 
WA_U_12448_STR-ABLD13 sy-vline 
WA_U_12448_STR-ABLD14 sy-vline 
WA_U_12448_STR-ABLD15 sy-vline 
WA_U_12448_STR-ABLD16 sy-vline 
WA_U_12448_STR-EBLD01 sy-vline 
WA_U_12448_STR-EBLD02 sy-vline 
WA_U_12448_STR-EBLD03 sy-vline 
WA_U_12448_STR-EBLD04 sy-vline 
WA_U_12448_STR-EBLD05 sy-vline 
WA_U_12448_STR-EBLD06 sy-vline 
WA_U_12448_STR-EBLD07 sy-vline 
WA_U_12448_STR-EBLD08 sy-vline 
WA_U_12448_STR-EBLD09 sy-vline 
WA_U_12448_STR-EBLD10 sy-vline 
WA_U_12448_STR-EBLD11 sy-vline 
WA_U_12448_STR-EBLD12 sy-vline 
WA_U_12448_STR-EBLD13 sy-vline 
WA_U_12448_STR-EBLD14 sy-vline 
WA_U_12448_STR-EBLD15 sy-vline 
WA_U_12448_STR-EBLD16 sy-vline 
WA_U_12448_STR-ABTR01 sy-vline 
WA_U_12448_STR-ABTR02 sy-vline 
WA_U_12448_STR-ABTR03 sy-vline 
WA_U_12448_STR-ABTR04 sy-vline 
WA_U_12448_STR-ABTR05 sy-vline 
WA_U_12448_STR-ABTR06 sy-vline 
WA_U_12448_STR-ABTR07 sy-vline 
WA_U_12448_STR-ABTR08 sy-vline 
WA_U_12448_STR-ABTR09 sy-vline 
WA_U_12448_STR-ABTR10 sy-vline 
WA_U_12448_STR-ABTR11 sy-vline 
WA_U_12448_STR-ABTR12 sy-vline 
WA_U_12448_STR-ABTR13 sy-vline 
WA_U_12448_STR-ABTR14 sy-vline 
WA_U_12448_STR-ABTR15 sy-vline 
WA_U_12448_STR-ABTR16 sy-vline 
WA_U_12448_STR-EBTR01 sy-vline 
WA_U_12448_STR-EBTR02 sy-vline 
WA_U_12448_STR-EBTR03 sy-vline 
WA_U_12448_STR-EBTR04 sy-vline 
WA_U_12448_STR-EBTR05 sy-vline 
WA_U_12448_STR-EBTR06 sy-vline 
WA_U_12448_STR-EBTR07 sy-vline 
WA_U_12448_STR-EBTR08 sy-vline 
WA_U_12448_STR-EBTR09 sy-vline 
WA_U_12448_STR-EBTR10 sy-vline 
WA_U_12448_STR-EBTR11 sy-vline 
WA_U_12448_STR-EBTR12 sy-vline 
WA_U_12448_STR-EBTR13 sy-vline 
WA_U_12448_STR-EBTR14 sy-vline 
WA_U_12448_STR-EBTR15 sy-vline 
WA_U_12448_STR-EBTR16 sy-vline      INTO ld_text SEPARATED BY SPACE.

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