ABAP Select data from SAP table U_17552 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP U_17552 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_17552. 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_17552 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_17552 TYPE STANDARD TABLE OF U_17552,
      WA_U_17552 TYPE U_17552,
      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_17552> TYPE U_17552.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_U_17552.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM U_17552
  INTO TABLE IT_U_17552.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM U_17552
*  INTO TABLE @DATA(IT_U_175522).
*--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_17552 INDEX 1 INTO DATA(WA_U_175522).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_U_17552 ASSIGNING <U_17552>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<U_17552>-MANDT = 1.
<U_17552>-LNRAPP = 1.
<U_17552>-EINRI = 1.
<U_17552>-PATNR = 1.
<U_17552>-PZIFF = 1.

ENDLOOP.

LOOP AT IT_U_17552 INTO WA_U_17552.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_U_17552-FALNR, sy-vline,
  WA_U_17552-FZIFF, sy-vline,
  WA_U_17552-NNAME, sy-vline,
  WA_U_17552-VNAME, sy-vline,
  WA_U_17552-TITEL, sy-vline,
  WA_U_17552-NAMZU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_U_17552 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_17552 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_17552 INTO WA_U_17552.


*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 LNRAPP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-LNRAPP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-LNRAPP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PATNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-PATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-PATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGFA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-ORGFA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-ORGFA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGPF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-ORGPF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-ORGPF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PERNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-PERNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-PERNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZIMMR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-ZIMMR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-ZIMMR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BEKAT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_U_17552-BEKAT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_U_17552-BEKAT.
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_17552_STR, 
MANDT TYPE STRING,
LNRAPP TYPE STRING,
EINRI TYPE STRING,
PATNR TYPE STRING,
PZIFF TYPE STRING,
FALNR TYPE STRING,
FZIFF TYPE STRING,
NNAME TYPE STRING,
VNAME TYPE STRING,
TITEL TYPE STRING,
NAMZU TYPE STRING,
VORSW TYPE STRING,
GBDAT TYPE STRING,
GSCHL TYPE STRING,
FALAR TYPE STRING,
NOTAN TYPE STRING,
KRZAN TYPE STRING,
LFDNR TYPE STRING,
BWART TYPE STRING,
DSPTY TYPE STRING,
VISTY TYPE STRING,
BWIDT TYPE STRING,
BWIZT TYPE STRING,
STATU TYPE STRING,
ORGFA TYPE STRING,
ORGPF TYPE STRING,
POBNR TYPE STRING,
PERNR TYPE STRING,
ZIMMR TYPE STRING,
BEKAT TYPE STRING,
KZTXT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
LGTXT TYPE STRING,
RISKF TYPE STRING,
TELF1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_U_17552_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_17552_STR-MANDT sy-vline 
WA_U_17552_STR-LNRAPP sy-vline 
WA_U_17552_STR-EINRI sy-vline 
WA_U_17552_STR-PATNR sy-vline 
WA_U_17552_STR-PZIFF sy-vline 
WA_U_17552_STR-FALNR sy-vline 
WA_U_17552_STR-FZIFF sy-vline 
WA_U_17552_STR-NNAME sy-vline 
WA_U_17552_STR-VNAME sy-vline 
WA_U_17552_STR-TITEL sy-vline 
WA_U_17552_STR-NAMZU sy-vline 
WA_U_17552_STR-VORSW sy-vline 
WA_U_17552_STR-GBDAT sy-vline 
WA_U_17552_STR-GSCHL sy-vline 
WA_U_17552_STR-FALAR sy-vline 
WA_U_17552_STR-NOTAN sy-vline 
WA_U_17552_STR-KRZAN sy-vline 
WA_U_17552_STR-LFDNR sy-vline 
WA_U_17552_STR-BWART sy-vline 
WA_U_17552_STR-DSPTY sy-vline 
WA_U_17552_STR-VISTY sy-vline 
WA_U_17552_STR-BWIDT sy-vline 
WA_U_17552_STR-BWIZT sy-vline 
WA_U_17552_STR-STATU sy-vline 
WA_U_17552_STR-ORGFA sy-vline 
WA_U_17552_STR-ORGPF sy-vline 
WA_U_17552_STR-POBNR sy-vline 
WA_U_17552_STR-PERNR sy-vline 
WA_U_17552_STR-ZIMMR sy-vline 
WA_U_17552_STR-BEKAT sy-vline 
WA_U_17552_STR-KZTXT sy-vline 
WA_U_17552_STR-ERDAT sy-vline 
WA_U_17552_STR-ERUSR sy-vline 
WA_U_17552_STR-UPDAT sy-vline 
WA_U_17552_STR-UPUSR sy-vline 
WA_U_17552_STR-LGTXT sy-vline 
WA_U_17552_STR-RISKF sy-vline 
WA_U_17552_STR-TELF1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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