ABAP Select data from SAP table LAWDESTCUS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LAWDESTCUS
*  INTO TABLE @DATA(IT_LAWDESTCUS2).
*--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_LAWDESTCUS INDEX 1 INTO DATA(WA_LAWDESTCUS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LAWDESTCUS>-SYS_NUMBER = 1.
<LAWDESTCUS>-SYSID = 1.
<LAWDESTCUS>-INSTNO = 1.
<LAWDESTCUS>-HWKEY = 1.
<LAWDESTCUS>-CUSTOMER_NUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LAWDESTCUS-ACTIVE, sy-vline,
  WA_LAWDESTCUS-SYSNUM_AVAILABLE, sy-vline,
  WA_LAWDESTCUS-ACTIVE_HWKEY, sy-vline,
  WA_LAWDESTCUS-SAPREL, sy-vline,
  WA_LAWDESTCUS-SYSSTATUS, sy-vline,
  WA_LAWDESTCUS-PATCHLEVEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LAWDESTCUS 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_LAWDESTCUS 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_LAWDESTCUS INTO WA_LAWDESTCUS.


*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_LAWDESTCUS_STR, 
SYS_NUMBER TYPE STRING,
SYSID TYPE STRING,
INSTNO TYPE STRING,
HWKEY TYPE STRING,
CUSTOMER_NUMBER TYPE STRING,
ACTIVE TYPE STRING,
SYSNUM_AVAILABLE TYPE STRING,
ACTIVE_HWKEY TYPE STRING,
SAPREL TYPE STRING,
SYSSTATUS TYPE STRING,
PATCHLEVEL TYPE STRING,
PLUGINVERS TYPE STRING,
LASTACTION TYPE STRING,
VERSTDATE TYPE STRING,
VERSTTIME TYPE STRING,
VERSTRES TYPE STRING,
VERBTDATE TYPE STRING,
VERBTTIME TYPE STRING,
VERBTRES TYPE STRING,
COMP_RFCDEST TYPE STRING,
COMP_SRVUSER TYPE STRING,
LAW_RFCDEST TYPE STRING,
LAW_SRVUSER TYPE STRING,
AUTH_METHOD TYPE STRING,
PMODE TYPE STRING,
PLUGIN TYPE STRING,
ERRNUMBER TYPE STRING,
STATUS_C TYPE STRING,
STATUS_E TYPE STRING,
STATUS_M TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LAWDESTCUS_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_LAWDESTCUS_STR-SYS_NUMBER sy-vline 
WA_LAWDESTCUS_STR-SYSID sy-vline 
WA_LAWDESTCUS_STR-INSTNO sy-vline 
WA_LAWDESTCUS_STR-HWKEY sy-vline 
WA_LAWDESTCUS_STR-CUSTOMER_NUMBER sy-vline 
WA_LAWDESTCUS_STR-ACTIVE sy-vline 
WA_LAWDESTCUS_STR-SYSNUM_AVAILABLE sy-vline 
WA_LAWDESTCUS_STR-ACTIVE_HWKEY sy-vline 
WA_LAWDESTCUS_STR-SAPREL sy-vline 
WA_LAWDESTCUS_STR-SYSSTATUS sy-vline 
WA_LAWDESTCUS_STR-PATCHLEVEL sy-vline 
WA_LAWDESTCUS_STR-PLUGINVERS sy-vline 
WA_LAWDESTCUS_STR-LASTACTION sy-vline 
WA_LAWDESTCUS_STR-VERSTDATE sy-vline 
WA_LAWDESTCUS_STR-VERSTTIME sy-vline 
WA_LAWDESTCUS_STR-VERSTRES sy-vline 
WA_LAWDESTCUS_STR-VERBTDATE sy-vline 
WA_LAWDESTCUS_STR-VERBTTIME sy-vline 
WA_LAWDESTCUS_STR-VERBTRES sy-vline 
WA_LAWDESTCUS_STR-COMP_RFCDEST sy-vline 
WA_LAWDESTCUS_STR-COMP_SRVUSER sy-vline 
WA_LAWDESTCUS_STR-LAW_RFCDEST sy-vline 
WA_LAWDESTCUS_STR-LAW_SRVUSER sy-vline 
WA_LAWDESTCUS_STR-AUTH_METHOD sy-vline 
WA_LAWDESTCUS_STR-PMODE sy-vline 
WA_LAWDESTCUS_STR-PLUGIN sy-vline 
WA_LAWDESTCUS_STR-ERRNUMBER sy-vline 
WA_LAWDESTCUS_STR-STATUS_C sy-vline 
WA_LAWDESTCUS_STR-STATUS_E sy-vline 
WA_LAWDESTCUS_STR-STATUS_M sy-vline      INTO ld_text SEPARATED BY SPACE.

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