ABAP Select data from SAP table USRCD_T_API into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP USRCD_T_API 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 USRCD_T_API. 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 USRCD_T_API 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_USRCD_T_API TYPE STANDARD TABLE OF USRCD_T_API,
      WA_USRCD_T_API TYPE USRCD_T_API,
      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: <USRCD_T_API> TYPE USRCD_T_API.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USRCD_T_API
*  INTO TABLE @DATA(IT_USRCD_T_API2).
*--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_USRCD_T_API INDEX 1 INTO DATA(WA_USRCD_T_API2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USRCD_T_API>-BNAME = 1.
<USRCD_T_API>-MODDA = 1.
<USRCD_T_API>-MODTI = 1.
<USRCD_T_API>-MODBE = 1.
<USRCD_T_API>-T_USH04 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USRCD_T_API-T_USR04, sy-vline,
  WA_USRCD_T_API-T_USH02, sy-vline,
  WA_USRCD_T_API-NRPRO, sy-vline,
  WA_USRCD_T_API-PROFS, sy-vline,
  WA_USRCD_T_API-TPWD16, sy-vline,
  WA_USRCD_T_API-TPWD20, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USRCD_T_API 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_USRCD_T_API 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_USRCD_T_API INTO WA_USRCD_T_API.


*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 USTYP, internal->external for field USTYP
CALL FUNCTION 'CONVERSION_EXIT_USTYP_OUTPUT'
  EXPORTING
    input =                      WA_USRCD_T_API-USTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_USRCD_T_API-USTYP.
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_USRCD_T_API_STR, 
BNAME TYPE STRING,
MODDA TYPE STRING,
MODTI TYPE STRING,
MODBE TYPE STRING,
T_USH04 TYPE STRING,
T_USR04 TYPE STRING,
T_USH02 TYPE STRING,
NRPRO TYPE STRING,
PROFS TYPE STRING,
TPWD16 TYPE STRING,
TPWD20 TYPE STRING,
CODVN TYPE STRING,
COUNTER TYPE STRING,
GLTGV TYPE STRING,
GLTGB TYPE STRING,
USTYP TYPE STRING,
CLASS TYPE STRING,
UFLAG TYPE STRING,
ACCNT TYPE STRING,
REPID TYPE STRING,
TCODE TYPE STRING,
SECURITY_POLICY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USRCD_T_API_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_USRCD_T_API_STR-BNAME sy-vline 
WA_USRCD_T_API_STR-MODDA sy-vline 
WA_USRCD_T_API_STR-MODTI sy-vline 
WA_USRCD_T_API_STR-MODBE sy-vline 
WA_USRCD_T_API_STR-T_USH04 sy-vline 
WA_USRCD_T_API_STR-T_USR04 sy-vline 
WA_USRCD_T_API_STR-T_USH02 sy-vline 
WA_USRCD_T_API_STR-NRPRO sy-vline 
WA_USRCD_T_API_STR-PROFS sy-vline 
WA_USRCD_T_API_STR-TPWD16 sy-vline 
WA_USRCD_T_API_STR-TPWD20 sy-vline 
WA_USRCD_T_API_STR-CODVN sy-vline 
WA_USRCD_T_API_STR-COUNTER sy-vline 
WA_USRCD_T_API_STR-GLTGV sy-vline 
WA_USRCD_T_API_STR-GLTGB sy-vline 
WA_USRCD_T_API_STR-USTYP sy-vline 
WA_USRCD_T_API_STR-CLASS sy-vline 
WA_USRCD_T_API_STR-UFLAG sy-vline 
WA_USRCD_T_API_STR-ACCNT sy-vline 
WA_USRCD_T_API_STR-REPID sy-vline 
WA_USRCD_T_API_STR-TCODE sy-vline 
WA_USRCD_T_API_STR-SECURITY_POLICY sy-vline      INTO ld_text SEPARATED BY SPACE.

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