ABAP Select data from SAP table U_30016 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_30016 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_30016. 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_30016 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_30016 TYPE STANDARD TABLE OF U_30016,
      WA_U_30016 TYPE U_30016,
      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_30016> TYPE U_30016.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_30016.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_30016
  INTO TABLE IT_U_30016.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_30016
*  INTO TABLE @DATA(IT_U_300162).
*--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_30016 INDEX 1 INTO DATA(WA_U_300162).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_30016 ASSIGNING <U_30016>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_30016>-MANDT = 1.
<U_30016>-EQUNR = 1.
<U_30016>-ZWNUMMER = 1.
<U_30016>-BIS = 1.
<U_30016>-AB = 1.

ENDLOOP.

LOOP AT IT_U_30016 INTO WA_U_30016.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_30016-LOGIKZW, sy-vline,
  WA_U_30016-SPARTYP, sy-vline,
  WA_U_30016-ZWKENN, sy-vline,
  WA_U_30016-KENNZIFF, sy-vline,
  WA_U_30016-ZWART, sy-vline,
  WA_U_30016-ZWFAKT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_30016 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_30016 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_30016 INTO WA_U_30016.


*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 EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_30016-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_30016-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MASSREAD
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_U_30016-MASSREAD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_30016-MASSREAD.
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_30016_STR, 
MANDT TYPE STRING,
EQUNR TYPE STRING,
ZWNUMMER TYPE STRING,
BIS TYPE STRING,
AB TYPE STRING,
LOGIKZW TYPE STRING,
SPARTYP TYPE STRING,
ZWKENN TYPE STRING,
KENNZIFF TYPE STRING,
ZWART TYPE STRING,
ZWFAKT TYPE STRING,
STANZVOR TYPE STRING,
STANZNAC TYPE STRING,
ZWTYP TYPE STRING,
BLIWIRK TYPE STRING,
MASSREAD TYPE STRING,
ANZERG TYPE STRING,
KZMESSW TYPE STRING,
TEMP_AREA TYPE STRING,
PR_AREA_AI TYPE STRING,
CALOR_AREA TYPE STRING,
HOEKORR TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_30016_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_30016_STR-MANDT sy-vline 
WA_U_30016_STR-EQUNR sy-vline 
WA_U_30016_STR-ZWNUMMER sy-vline 
WA_U_30016_STR-BIS sy-vline 
WA_U_30016_STR-AB sy-vline 
WA_U_30016_STR-LOGIKZW sy-vline 
WA_U_30016_STR-SPARTYP sy-vline 
WA_U_30016_STR-ZWKENN sy-vline 
WA_U_30016_STR-KENNZIFF sy-vline 
WA_U_30016_STR-ZWART sy-vline 
WA_U_30016_STR-ZWFAKT sy-vline 
WA_U_30016_STR-STANZVOR sy-vline 
WA_U_30016_STR-STANZNAC sy-vline 
WA_U_30016_STR-ZWTYP sy-vline 
WA_U_30016_STR-BLIWIRK sy-vline 
WA_U_30016_STR-MASSREAD sy-vline 
WA_U_30016_STR-ANZERG sy-vline 
WA_U_30016_STR-KZMESSW sy-vline 
WA_U_30016_STR-TEMP_AREA sy-vline 
WA_U_30016_STR-PR_AREA_AI sy-vline 
WA_U_30016_STR-CALOR_AREA sy-vline 
WA_U_30016_STR-HOEKORR sy-vline 
WA_U_30016_STR-ERDAT sy-vline 
WA_U_30016_STR-ERNAM sy-vline 
WA_U_30016_STR-AEDAT sy-vline 
WA_U_30016_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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