ABAP Select data from SAP table USRCERTRULE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM USRCERTRULE
*  INTO TABLE @DATA(IT_USRCERTRULE2).
*--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_USRCERTRULE INDEX 1 INTO DATA(WA_USRCERTRULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<USRCERTRULE>-CLIENT = 1.
<USRCERTRULE>-CERTINDEX = 1.
<USRCERTRULE>-SUBJECTFH = 1.
<USRCERTRULE>-ISSUERFH = 1.
<USRCERTRULE>-LOGONWITH = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_USRCERTRULE-CERTENTRY, sy-vline,
  WA_USRCERTRULE-CERTATTRIBUTE, sy-vline,
  WA_USRCERTRULE-FILTERCASE, sy-vline,
  WA_USRCERTRULE-OPTIONS, sy-vline,
  WA_USRCERTRULE-CHANGEDBY, sy-vline,
  WA_USRCERTRULE-CHANGEDON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_USRCERTRULE 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_USRCERTRULE 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_USRCERTRULE INTO WA_USRCERTRULE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_USRCERTRULE_STR, 
CLIENT TYPE STRING,
CERTINDEX TYPE STRING,
SUBJECTFH TYPE STRING,
ISSUERFH TYPE STRING,
LOGONWITH TYPE STRING,
CERTENTRY TYPE STRING,
CERTATTRIBUTE TYPE STRING,
FILTERCASE TYPE STRING,
OPTIONS TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGEDON TYPE STRING,
SUBJECTFLT TYPE STRING,
ISSUERFLT TYPE STRING,
CERTOIDATTRIBUTE TYPE STRING,
SUBJECTCLFLT TYPE STRING,
ISSUERCLFLT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_USRCERTRULE_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_USRCERTRULE_STR-CLIENT sy-vline 
WA_USRCERTRULE_STR-CERTINDEX sy-vline 
WA_USRCERTRULE_STR-SUBJECTFH sy-vline 
WA_USRCERTRULE_STR-ISSUERFH sy-vline 
WA_USRCERTRULE_STR-LOGONWITH sy-vline 
WA_USRCERTRULE_STR-CERTENTRY sy-vline 
WA_USRCERTRULE_STR-CERTATTRIBUTE sy-vline 
WA_USRCERTRULE_STR-FILTERCASE sy-vline 
WA_USRCERTRULE_STR-OPTIONS sy-vline 
WA_USRCERTRULE_STR-CHANGEDBY sy-vline 
WA_USRCERTRULE_STR-CHANGEDON sy-vline 
WA_USRCERTRULE_STR-SUBJECTFLT sy-vline 
WA_USRCERTRULE_STR-ISSUERFLT sy-vline 
WA_USRCERTRULE_STR-CERTOIDATTRIBUTE sy-vline 
WA_USRCERTRULE_STR-SUBJECTCLFLT sy-vline 
WA_USRCERTRULE_STR-ISSUERCLFLT sy-vline      INTO ld_text SEPARATED BY SPACE.

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