ABAP Select data from SAP table QDSIG_CERT_SIGN_LOG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM QDSIG_CERT_SIGN_LOG
*  INTO TABLE @DATA(IT_QDSIG_CERT_SIGN_LOG2).
*--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_QDSIG_CERT_SIGN_LOG INDEX 1 INTO DATA(WA_QDSIG_CERT_SIGN_LOG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<QDSIG_CERT_SIGN_LOG>-SIGN_OBJECT = 1.
<QDSIG_CERT_SIGN_LOG>-SIGNER = 1.
<QDSIG_CERT_SIGN_LOG>-SIGN_REASON = 1.
<QDSIG_CERT_SIGN_LOG>-SIGN_TSTAMP = 1.
<QDSIG_CERT_SIGN_LOG>-METHOD = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_QDSIG_CERT_SIGN_LOG-SIGNSTRAT, sy-vline,
  WA_QDSIG_CERT_SIGN_LOG-SIGNSTEP, sy-vline,
  WA_QDSIG_CERT_SIGN_LOG-SIGNAUTH, sy-vline,
  WA_QDSIG_CERT_SIGN_LOG-SIGN_STATE, sy-vline,
  WA_QDSIG_CERT_SIGN_LOG-CERTNO, sy-vline,
  WA_QDSIG_CERT_SIGN_LOG-EBELN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_QDSIG_CERT_SIGN_LOG 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_QDSIG_CERT_SIGN_LOG 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_QDSIG_CERT_SIGN_LOG INTO WA_QDSIG_CERT_SIGN_LOG.


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

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

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

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_QDSIG_CERT_SIGN_LOG-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_QDSIG_CERT_SIGN_LOG-LIFNR.
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_QDSIG_CERT_SIGN_LOG_STR, 
SIGN_OBJECT TYPE STRING,
SIGNER TYPE STRING,
SIGN_REASON TYPE STRING,
SIGN_TSTAMP TYPE STRING,
METHOD TYPE STRING,
SIGNSTRAT TYPE STRING,
SIGNSTEP TYPE STRING,
SIGNAUTH TYPE STRING,
SIGN_STATE TYPE STRING,
CERTNO TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
MBLNR TYPE STRING,
ZEILE TYPE STRING,
ZGTYP TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LIFNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_QDSIG_CERT_SIGN_LOG_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_QDSIG_CERT_SIGN_LOG_STR-SIGN_OBJECT sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGNER sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGN_REASON sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGN_TSTAMP sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-METHOD sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGNSTRAT sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGNSTEP sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGNAUTH sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-SIGN_STATE sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-CERTNO sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-EBELN sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-EBELP sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-MBLNR sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-ZEILE sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-ZGTYP sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-MATNR sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-WERKS sy-vline 
WA_QDSIG_CERT_SIGN_LOG_STR-LIFNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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