ABAP Select data from SAP table U_16819 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_16819 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_16819. 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_16819 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_16819 TYPE STANDARD TABLE OF U_16819,
      WA_U_16819 TYPE U_16819,
      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_16819> TYPE U_16819.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_16819.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_16819
  INTO TABLE IT_U_16819.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_16819
*  INTO TABLE @DATA(IT_U_168192).
*--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_16819 INDEX 1 INTO DATA(WA_U_168192).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_16819 ASSIGNING <U_16819>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_16819>-MANDT = 1.
<U_16819>-ABELN = 1.
<U_16819>-ABELP = 1.
<U_16819>-VZWRK = 1.
<U_16819>-LFNUM = 1.

ENDLOOP.

LOOP AT IT_U_16819 INTO WA_U_16819.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_16819-WEVDT, sy-vline,
  WA_U_16819-WEVTP, sy-vline,
  WA_U_16819-WEUZT, sy-vline,
  WA_U_16819-WEPRZ, sy-vline,
  WA_U_16819-MENGE, sy-vline,
  WA_U_16819-AUFME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_16819 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_16819 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_16819 INTO WA_U_16819.


*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 ABELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-ABELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-ABELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AUFME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-AUFME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-AUFME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field MBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-MBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-MBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field VRKME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-VRKME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-VRKME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BSTME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-BSTME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-BSTME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EBLNU
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-EBLNU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-EBLNU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UMLME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_16819-UMLME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16819-UMLME.
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_16819_STR, 
MANDT TYPE STRING,
ABELN TYPE STRING,
ABELP TYPE STRING,
VZWRK TYPE STRING,
LFNUM TYPE STRING,
WEVDT TYPE STRING,
WEVTP TYPE STRING,
WEUZT TYPE STRING,
WEPRZ TYPE STRING,
MENGE TYPE STRING,
AUFME TYPE STRING,
WEMNG TYPE STRING,
MBLNR TYPE STRING,
MBLPO TYPE STRING,
LFMNG TYPE STRING,
VRKME TYPE STRING,
BEDAT TYPE STRING,
BSTMG TYPE STRING,
BSTME TYPE STRING,
EBLNU TYPE STRING,
EBLPU TYPE STRING,
UMLMG TYPE STRING,
UMLME TYPE STRING,
ELIKZ TYPE STRING,
IMNGL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_16819_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_16819_STR-MANDT sy-vline 
WA_U_16819_STR-ABELN sy-vline 
WA_U_16819_STR-ABELP sy-vline 
WA_U_16819_STR-VZWRK sy-vline 
WA_U_16819_STR-LFNUM sy-vline 
WA_U_16819_STR-WEVDT sy-vline 
WA_U_16819_STR-WEVTP sy-vline 
WA_U_16819_STR-WEUZT sy-vline 
WA_U_16819_STR-WEPRZ sy-vline 
WA_U_16819_STR-MENGE sy-vline 
WA_U_16819_STR-AUFME sy-vline 
WA_U_16819_STR-WEMNG sy-vline 
WA_U_16819_STR-MBLNR sy-vline 
WA_U_16819_STR-MBLPO sy-vline 
WA_U_16819_STR-LFMNG sy-vline 
WA_U_16819_STR-VRKME sy-vline 
WA_U_16819_STR-BEDAT sy-vline 
WA_U_16819_STR-BSTMG sy-vline 
WA_U_16819_STR-BSTME sy-vline 
WA_U_16819_STR-EBLNU sy-vline 
WA_U_16819_STR-EBLPU sy-vline 
WA_U_16819_STR-UMLMG sy-vline 
WA_U_16819_STR-UMLME sy-vline 
WA_U_16819_STR-ELIKZ sy-vline 
WA_U_16819_STR-IMNGL sy-vline      INTO ld_text SEPARATED BY SPACE.

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