ABAP Select data from SAP table LAW2_S_RFCACTION into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LAW2_S_RFCACTION 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 LAW2_S_RFCACTION. 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 LAW2_S_RFCACTION 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_LAW2_S_RFCACTION TYPE STANDARD TABLE OF LAW2_S_RFCACTION,
      WA_LAW2_S_RFCACTION TYPE LAW2_S_RFCACTION,
      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: <LAW2_S_RFCACTION> TYPE LAW2_S_RFCACTION.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LAW2_S_RFCACTION.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LAW2_S_RFCACTION
  INTO TABLE IT_LAW2_S_RFCACTION.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LAW2_S_RFCACTION
*  INTO TABLE @DATA(IT_LAW2_S_RFCACTION2).
*--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_LAW2_S_RFCACTION INDEX 1 INTO DATA(WA_LAW2_S_RFCACTION2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LAW2_S_RFCACTION ASSIGNING <LAW2_S_RFCACTION>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LAW2_S_RFCACTION>-DATASETGUID = 1.
<LAW2_S_RFCACTION>-SYSTEMGUID = 1.
<LAW2_S_RFCACTION>-SYSID = 1.
<LAW2_S_RFCACTION>-SYSTEMNO = 1.
<LAW2_S_RFCACTION>-INSTNO = 1.

ENDLOOP.

LOOP AT IT_LAW2_S_RFCACTION INTO WA_LAW2_S_RFCACTION.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LAW2_S_RFCACTION-RFCDESTINATION, sy-vline,
  WA_LAW2_S_RFCACTION-RFCUSER, sy-vline,
  WA_LAW2_S_RFCACTION-LASTACTION, sy-vline,
  WA_LAW2_S_RFCACTION-RSLAWPLUGIN, sy-vline,
  WA_LAW2_S_RFCACTION-ERRNUMBER, sy-vline,
  WA_LAW2_S_RFCACTION-MSGV1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LAW2_S_RFCACTION 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_LAW2_S_RFCACTION 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_LAW2_S_RFCACTION INTO WA_LAW2_S_RFCACTION.


*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_LAW2_S_RFCACTION_STR, 
DATASETGUID TYPE STRING,
SYSTEMGUID TYPE STRING,
SYSID TYPE STRING,
SYSTEMNO TYPE STRING,
INSTNO TYPE STRING,
RFCDESTINATION TYPE STRING,
RFCUSER TYPE STRING,
LASTACTION TYPE STRING,
RSLAWPLUGIN TYPE STRING,
ERRNUMBER TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
SENDDATE TYPE STRING,
SENDTIME TYPE STRING,
RECEIVEDATE TYPE STRING,
RECEIVETIME TYPE STRING,
IMPORTSUCCESS TYPE STRING,
IMPORTDATE TYPE STRING,
IMPORTTIME TYPE STRING,
IMPORTUSER TYPE STRING,
PROCESSINGMODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LAW2_S_RFCACTION_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_LAW2_S_RFCACTION_STR-DATASETGUID sy-vline 
WA_LAW2_S_RFCACTION_STR-SYSTEMGUID sy-vline 
WA_LAW2_S_RFCACTION_STR-SYSID sy-vline 
WA_LAW2_S_RFCACTION_STR-SYSTEMNO sy-vline 
WA_LAW2_S_RFCACTION_STR-INSTNO sy-vline 
WA_LAW2_S_RFCACTION_STR-RFCDESTINATION sy-vline 
WA_LAW2_S_RFCACTION_STR-RFCUSER sy-vline 
WA_LAW2_S_RFCACTION_STR-LASTACTION sy-vline 
WA_LAW2_S_RFCACTION_STR-RSLAWPLUGIN sy-vline 
WA_LAW2_S_RFCACTION_STR-ERRNUMBER sy-vline 
WA_LAW2_S_RFCACTION_STR-MSGV1 sy-vline 
WA_LAW2_S_RFCACTION_STR-MSGV2 sy-vline 
WA_LAW2_S_RFCACTION_STR-MSGV3 sy-vline 
WA_LAW2_S_RFCACTION_STR-MSGV4 sy-vline 
WA_LAW2_S_RFCACTION_STR-SENDDATE sy-vline 
WA_LAW2_S_RFCACTION_STR-SENDTIME sy-vline 
WA_LAW2_S_RFCACTION_STR-RECEIVEDATE sy-vline 
WA_LAW2_S_RFCACTION_STR-RECEIVETIME sy-vline 
WA_LAW2_S_RFCACTION_STR-IMPORTSUCCESS sy-vline 
WA_LAW2_S_RFCACTION_STR-IMPORTDATE sy-vline 
WA_LAW2_S_RFCACTION_STR-IMPORTTIME sy-vline 
WA_LAW2_S_RFCACTION_STR-IMPORTUSER sy-vline 
WA_LAW2_S_RFCACTION_STR-PROCESSINGMODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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