ABAP Select data from SAP table U_16989 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_16989 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_16989. 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_16989 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_16989 TYPE STANDARD TABLE OF U_16989,
      WA_U_16989 TYPE U_16989,
      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_16989> TYPE U_16989.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_16989.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_16989
  INTO TABLE IT_U_16989.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_16989
*  INTO TABLE @DATA(IT_U_169892).
*--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_16989 INDEX 1 INTO DATA(WA_U_169892).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_16989 ASSIGNING <U_16989>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_16989>-MANDT = 1.
<U_16989>-LOCNR = 1.
<U_16989>-BBTYP = 1.
<U_16989>-MATNR = 1.
<U_16989>-VERSNR = 1.

ENDLOOP.

LOOP AT IT_U_16989 INTO WA_U_16989.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_16989-BBRNO, sy-vline,
  WA_U_16989-EAN11, sy-vline,
  WA_U_16989-EANTP, sy-vline,
  WA_U_16989-BBGNO, sy-vline,
  WA_U_16989-PGNUM, sy-vline,
  WA_U_16989-AENTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_16989 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_16989 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_16989 INTO WA_U_16989.


*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 LOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_16989-LOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16989-LOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_U_16989-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16989-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EAN11, internal->external for field EAN11
CALL FUNCTION 'CONVERSION_EXIT_EAN11_OUTPUT'
  EXPORTING
    input =                      WA_U_16989-EAN11
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_16989-EAN11.
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_16989_STR, 
MANDT TYPE STRING,
LOCNR TYPE STRING,
BBTYP TYPE STRING,
MATNR TYPE STRING,
VERSNR TYPE STRING,
BBRNO TYPE STRING,
EAN11 TYPE STRING,
EANTP TYPE STRING,
BBGNO TYPE STRING,
PGNUM TYPE STRING,
AENTP TYPE STRING,
LABRL TYPE STRING,
BBLIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_16989_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_16989_STR-MANDT sy-vline 
WA_U_16989_STR-LOCNR sy-vline 
WA_U_16989_STR-BBTYP sy-vline 
WA_U_16989_STR-MATNR sy-vline 
WA_U_16989_STR-VERSNR sy-vline 
WA_U_16989_STR-BBRNO sy-vline 
WA_U_16989_STR-EAN11 sy-vline 
WA_U_16989_STR-EANTP sy-vline 
WA_U_16989_STR-BBGNO sy-vline 
WA_U_16989_STR-PGNUM sy-vline 
WA_U_16989_STR-AENTP sy-vline 
WA_U_16989_STR-LABRL sy-vline 
WA_U_16989_STR-BBLIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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