ABAP Select data from SAP table LAW2_S_DATASET 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_DATASET 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_DATASET. 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_DATASET 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_DATASET TYPE STANDARD TABLE OF LAW2_S_DATASET,
      WA_LAW2_S_DATASET TYPE LAW2_S_DATASET,
      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_DATASET> TYPE LAW2_S_DATASET.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LAW2_S_DATASET.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LAW2_S_DATASET
  INTO TABLE IT_LAW2_S_DATASET.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LAW2_S_DATASET
*  INTO TABLE @DATA(IT_LAW2_S_DATASET2).
*--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_DATASET INDEX 1 INTO DATA(WA_LAW2_S_DATASET2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LAW2_S_DATASET ASSIGNING <LAW2_S_DATASET>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LAW2_S_DATASET>-DATASETGUID = 1.
<LAW2_S_DATASET>-DATASETID = 1.
<LAW2_S_DATASET>-STATUS = 1.
<LAW2_S_DATASET>-DESCRIPTION = 1.
<LAW2_S_DATASET>-USERGROUPINGFIELD = 1.

ENDLOOP.

LOOP AT IT_LAW2_S_DATASET INTO WA_LAW2_S_DATASET.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LAW2_S_DATASET-PERSOBJGROUPING, sy-vline,
  WA_LAW2_S_DATASET-USERGROUPINGFIELD2, sy-vline,
  WA_LAW2_S_DATASET-PERSOBJGROUPING2, sy-vline,
  WA_LAW2_S_DATASET-USERSBEFOREGROUPING, sy-vline,
  WA_LAW2_S_DATASET-USERSAFTERGROUPING, sy-vline,
  WA_LAW2_S_DATASET-EMPTYGROUPINGATTRUSERS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LAW2_S_DATASET 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_DATASET 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_DATASET INTO WA_LAW2_S_DATASET.


*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 DATASETID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LAW2_S_DATASET-DATASETID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LAW2_S_DATASET-DATASETID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SXIDN, internal->external for field EMAILSENDER
CALL FUNCTION 'CONVERSION_EXIT_SXIDN_OUTPUT'
  EXPORTING
    input =                      WA_LAW2_S_DATASET-EMAILSENDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LAW2_S_DATASET-EMAILSENDER.
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_LAW2_S_DATASET_STR, 
DATASETGUID TYPE STRING,
DATASETID TYPE STRING,
STATUS TYPE STRING,
DESCRIPTION TYPE STRING,
USERGROUPINGFIELD TYPE STRING,
PERSOBJGROUPING TYPE STRING,
USERGROUPINGFIELD2 TYPE STRING,
PERSOBJGROUPING2 TYPE STRING,
USERSBEFOREGROUPING TYPE STRING,
USERSAFTERGROUPING TYPE STRING,
EMPTYGROUPINGATTRUSERS TYPE STRING,
EMAILSENDER TYPE STRING,
SENDCOMMENT TYPE STRING,
TRANSFERDATE TYPE STRING,
TRANSFERTIME TYPE STRING,
TRANSFERTYPE TYPE STRING,
TRANSFERSTATUS_SDCCN TYPE STRING,
SDCCN_SESSIONNR TYPE STRING,
SDCCN_INSTNO TYPE STRING,
SDCCN_REQSID TYPE STRING,
EXTGROUPINGATTRIBUTE TYPE STRING,
EXTATTRSTATUS TYPE STRING,
NMPCOMMENT TYPE STRING,
EXTRESULTCOUNTER TYPE STRING,
CRNAME TYPE STRING,
CRDATE TYPE STRING,
CRTIME TYPE STRING,
CHNAME TYPE STRING,
CHDATE TYPE STRING,
CHTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LAW2_S_DATASET_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_DATASET_STR-DATASETGUID sy-vline 
WA_LAW2_S_DATASET_STR-DATASETID sy-vline 
WA_LAW2_S_DATASET_STR-STATUS sy-vline 
WA_LAW2_S_DATASET_STR-DESCRIPTION sy-vline 
WA_LAW2_S_DATASET_STR-USERGROUPINGFIELD sy-vline 
WA_LAW2_S_DATASET_STR-PERSOBJGROUPING sy-vline 
WA_LAW2_S_DATASET_STR-USERGROUPINGFIELD2 sy-vline 
WA_LAW2_S_DATASET_STR-PERSOBJGROUPING2 sy-vline 
WA_LAW2_S_DATASET_STR-USERSBEFOREGROUPING sy-vline 
WA_LAW2_S_DATASET_STR-USERSAFTERGROUPING sy-vline 
WA_LAW2_S_DATASET_STR-EMPTYGROUPINGATTRUSERS sy-vline 
WA_LAW2_S_DATASET_STR-EMAILSENDER sy-vline 
WA_LAW2_S_DATASET_STR-SENDCOMMENT sy-vline 
WA_LAW2_S_DATASET_STR-TRANSFERDATE sy-vline 
WA_LAW2_S_DATASET_STR-TRANSFERTIME sy-vline 
WA_LAW2_S_DATASET_STR-TRANSFERTYPE sy-vline 
WA_LAW2_S_DATASET_STR-TRANSFERSTATUS_SDCCN sy-vline 
WA_LAW2_S_DATASET_STR-SDCCN_SESSIONNR sy-vline 
WA_LAW2_S_DATASET_STR-SDCCN_INSTNO sy-vline 
WA_LAW2_S_DATASET_STR-SDCCN_REQSID sy-vline 
WA_LAW2_S_DATASET_STR-EXTGROUPINGATTRIBUTE sy-vline 
WA_LAW2_S_DATASET_STR-EXTATTRSTATUS sy-vline 
WA_LAW2_S_DATASET_STR-NMPCOMMENT sy-vline 
WA_LAW2_S_DATASET_STR-EXTRESULTCOUNTER sy-vline 
WA_LAW2_S_DATASET_STR-CRNAME sy-vline 
WA_LAW2_S_DATASET_STR-CRDATE sy-vline 
WA_LAW2_S_DATASET_STR-CRTIME sy-vline 
WA_LAW2_S_DATASET_STR-CHNAME sy-vline 
WA_LAW2_S_DATASET_STR-CHDATE sy-vline 
WA_LAW2_S_DATASET_STR-CHTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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