ABAP Select data from SAP table TOALOGLINK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TOALOGLINK
*  INTO TABLE @DATA(IT_TOALOGLINK2).
*--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_TOALOGLINK INDEX 1 INTO DATA(WA_TOALOGLINK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TOALOGLINK>-KOPF = 1.
<TOALOGLINK>-MANDT = 1.
<TOALOGLINK>-AR_USER = 1.
<TOALOGLINK>-LOG_TIME = 1.
<TOALOGLINK>-LOG_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TOALOGLINK-SAP_OBJECT, sy-vline,
  WA_TOALOGLINK-OBJECT_ID, sy-vline,
  WA_TOALOGLINK-AR_OBJECT, sy-vline,
  WA_TOALOGLINK-METHODE, sy-vline,
  WA_TOALOGLINK-LOGTEXT1, sy-vline,
  WA_TOALOGLINK-LOGTEXT2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TOALOGLINK 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_TOALOGLINK 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_TOALOGLINK INTO WA_TOALOGLINK.


*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_TOALOGLINK_STR, 
KOPF TYPE STRING,
MANDT TYPE STRING,
AR_USER TYPE STRING,
LOG_TIME TYPE STRING,
LOG_DATE TYPE STRING,
SAP_OBJECT TYPE STRING,
OBJECT_ID TYPE STRING,
AR_OBJECT TYPE STRING,
METHODE TYPE STRING,
LOGTEXT1 TYPE STRING,
LOGTEXT2 TYPE STRING,
ARCHIV_ID TYPE STRING,
ARC_DOC_ID TYPE STRING,
AR_DATE TYPE STRING,
AR_TYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TOALOGLINK_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_TOALOGLINK_STR-KOPF sy-vline 
WA_TOALOGLINK_STR-MANDT sy-vline 
WA_TOALOGLINK_STR-AR_USER sy-vline 
WA_TOALOGLINK_STR-LOG_TIME sy-vline 
WA_TOALOGLINK_STR-LOG_DATE sy-vline 
WA_TOALOGLINK_STR-SAP_OBJECT sy-vline 
WA_TOALOGLINK_STR-OBJECT_ID sy-vline 
WA_TOALOGLINK_STR-AR_OBJECT sy-vline 
WA_TOALOGLINK_STR-METHODE sy-vline 
WA_TOALOGLINK_STR-LOGTEXT1 sy-vline 
WA_TOALOGLINK_STR-LOGTEXT2 sy-vline 
WA_TOALOGLINK_STR-ARCHIV_ID sy-vline 
WA_TOALOGLINK_STR-ARC_DOC_ID sy-vline 
WA_TOALOGLINK_STR-AR_DATE sy-vline 
WA_TOALOGLINK_STR-AR_TYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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