ABAP Select data from SAP table U_15902 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_15902 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_15902. 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_15902 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_15902 TYPE STANDARD TABLE OF U_15902,
      WA_U_15902 TYPE U_15902,
      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_15902> TYPE U_15902.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_15902.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_15902
  INTO TABLE IT_U_15902.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_15902
*  INTO TABLE @DATA(IT_U_159022).
*--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_15902 INDEX 1 INTO DATA(WA_U_159022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_15902 ASSIGNING <U_15902>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_15902>-MANDT = 1.
<U_15902>-BELNR = 1.
<U_15902>-GJAHR = 1.
<U_15902>-BUZEI = 1.
<U_15902>-MATNR = 1.

ENDLOOP.

LOOP AT IT_U_15902 INTO WA_U_15902.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_15902-BWKEY, sy-vline,
  WA_U_15902-BWTAR, sy-vline,
  WA_U_15902-BUKRS, sy-vline,
  WA_U_15902-WERKS, sy-vline,
  WA_U_15902-WRBTR, sy-vline,
  WA_U_15902-SHKZG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_15902 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_15902 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_15902 INTO WA_U_15902.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_15902-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15902-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_U_15902-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15902-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_U_15902-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15902-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BSTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_15902-BSTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15902-BSTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_15902-BPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15902-BPRME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_15902-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_15902-MEINS.
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_15902_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
MATNR TYPE STRING,
BWKEY TYPE STRING,
BWTAR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
WRBTR TYPE STRING,
SHKZG TYPE STRING,
MWSKZ TYPE STRING,
TXJCD TYPE STRING,
MENGE TYPE STRING,
BSTME TYPE STRING,
BPMNG TYPE STRING,
BPRME TYPE STRING,
LBKUM TYPE STRING,
VRKUM TYPE STRING,
MEINS TYPE STRING,
PSTYP TYPE STRING,
KNTTP TYPE STRING,
BKLAS TYPE STRING,
EREKZ TYPE STRING,
EXKBE TYPE STRING,
XEKBZ TYPE STRING,
TBTKZ TYPE STRING,
SPGRP TYPE STRING,
SPGRM TYPE STRING,
SPGRT TYPE STRING,
SPGRG TYPE STRING,
SPGRV TYPE STRING,
SPGRQ TYPE STRING,
SPGRS TYPE STRING,
SPGRC TYPE STRING,
BUSTW TYPE STRING,
XBLNR TYPE STRING,
XRUEB TYPE STRING,
BNKAN TYPE STRING,
KSCHL TYPE STRING,
SALK3 TYPE STRING,
VMSAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_15902_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_15902_STR-MANDT sy-vline 
WA_U_15902_STR-BELNR sy-vline 
WA_U_15902_STR-GJAHR sy-vline 
WA_U_15902_STR-BUZEI sy-vline 
WA_U_15902_STR-MATNR sy-vline 
WA_U_15902_STR-BWKEY sy-vline 
WA_U_15902_STR-BWTAR sy-vline 
WA_U_15902_STR-BUKRS sy-vline 
WA_U_15902_STR-WERKS sy-vline 
WA_U_15902_STR-WRBTR sy-vline 
WA_U_15902_STR-SHKZG sy-vline 
WA_U_15902_STR-MWSKZ sy-vline 
WA_U_15902_STR-TXJCD sy-vline 
WA_U_15902_STR-MENGE sy-vline 
WA_U_15902_STR-BSTME sy-vline 
WA_U_15902_STR-BPMNG sy-vline 
WA_U_15902_STR-BPRME sy-vline 
WA_U_15902_STR-LBKUM sy-vline 
WA_U_15902_STR-VRKUM sy-vline 
WA_U_15902_STR-MEINS sy-vline 
WA_U_15902_STR-PSTYP sy-vline 
WA_U_15902_STR-KNTTP sy-vline 
WA_U_15902_STR-BKLAS sy-vline 
WA_U_15902_STR-EREKZ sy-vline 
WA_U_15902_STR-EXKBE sy-vline 
WA_U_15902_STR-XEKBZ sy-vline 
WA_U_15902_STR-TBTKZ sy-vline 
WA_U_15902_STR-SPGRP sy-vline 
WA_U_15902_STR-SPGRM sy-vline 
WA_U_15902_STR-SPGRT sy-vline 
WA_U_15902_STR-SPGRG sy-vline 
WA_U_15902_STR-SPGRV sy-vline 
WA_U_15902_STR-SPGRQ sy-vline 
WA_U_15902_STR-SPGRS sy-vline 
WA_U_15902_STR-SPGRC sy-vline 
WA_U_15902_STR-BUSTW sy-vline 
WA_U_15902_STR-XBLNR sy-vline 
WA_U_15902_STR-XRUEB sy-vline 
WA_U_15902_STR-BNKAN sy-vline 
WA_U_15902_STR-KSCHL sy-vline 
WA_U_15902_STR-SALK3 sy-vline 
WA_U_15902_STR-VMSAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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