ABAP Select data from SAP table BAPIP0021TW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPIP0021TW 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 BAPIP0021TW. 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 BAPIP0021TW 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_BAPIP0021TW TYPE STANDARD TABLE OF BAPIP0021TW,
      WA_BAPIP0021TW TYPE BAPIP0021TW,
      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: <BAPIP0021TW> TYPE BAPIP0021TW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPIP0021TW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPIP0021TW
  INTO TABLE IT_BAPIP0021TW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPIP0021TW
*  INTO TABLE @DATA(IT_BAPIP0021TW2).
*--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_BAPIP0021TW INDEX 1 INTO DATA(WA_BAPIP0021TW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPIP0021TW ASSIGNING <BAPIP0021TW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPIP0021TW>-EMPLOYEENO = 1.
<BAPIP0021TW>-SUBTYPE = 1.
<BAPIP0021TW>-OBJECTID = 1.
<BAPIP0021TW>-LOCKINDIC = 1.
<BAPIP0021TW>-VALIDEND = 1.

ENDLOOP.

LOOP AT IT_BAPIP0021TW INTO WA_BAPIP0021TW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPIP0021TW-VALIDBEGIN, sy-vline,
  WA_BAPIP0021TW-RECORDNR, sy-vline,
  WA_BAPIP0021TW-MEMBERTYPE, sy-vline,
  WA_BAPIP0021TW-NAMEFORMATIND, sy-vline,
  WA_BAPIP0021TW-FIRSTNAME, sy-vline,
  WA_BAPIP0021TW-LASTNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPIP0021TW 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_BAPIP0021TW 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_BAPIP0021TW INTO WA_BAPIP0021TW.


*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 PDATE, internal->external for field DATEOFBIRTH
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_BAPIP0021TW-DATEOFBIRTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPIP0021TW-DATEOFBIRTH.
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_BAPIP0021TW_STR, 
EMPLOYEENO TYPE STRING,
SUBTYPE TYPE STRING,
OBJECTID TYPE STRING,
LOCKINDIC TYPE STRING,
VALIDEND TYPE STRING,
VALIDBEGIN TYPE STRING,
RECORDNR TYPE STRING,
MEMBERTYPE TYPE STRING,
NAMEFORMATIND TYPE STRING,
FIRSTNAME TYPE STRING,
LASTNAME TYPE STRING,
GENDER TYPE STRING,
NAMEINPASSPORT TYPE STRING,
CHINESENAME TYPE STRING,
NATIONALITY TYPE STRING,
DATEOFBIRTH TYPE STRING,
PLACEOFBIRTH TYPE STRING,
IDNUMBER TYPE STRING,
IDCHECK TYPE STRING,
RELATIONSHIP TYPE STRING,
NHIFORFAMILY TYPE STRING,
NHIVALIDDATE TYPE STRING,
NHISTATUS TYPE STRING,
NHISTREASON TYPE STRING,
NHIEXEMPT TYPE STRING,
EXEMPTREASON TYPE STRING,
DISABILITYLEV TYPE STRING,
ZIPCODE TYPE STRING,
COUNTRY TYPE STRING,
COUNTYCODE TYPE STRING,
REGION TYPE STRING,
STREET TYPE STRING,
TELEPHONENO TYPE STRING,
VILLAGE TYPE STRING,
NEIGHBOR TYPE STRING,
TOWN TYPE STRING,
FULLADDRESS TYPE STRING,
NAMEOFGENDER TYPE STRING,
ZIPCODENAME TYPE STRING,
IDCHECKTEXT TYPE STRING,
NHISTATUSTEXT TYPE STRING,
NHISTREASONTXT TYPE STRING,
EXEMPTREASONTX TYPE STRING,
DISABILITYTYPE TYPE STRING,
RELATIONSHIPTX TYPE STRING,
NATIONALITYTXT TYPE STRING,
NAMEOFMEMBERTY TYPE STRING,
NAMEOFLAND TYPE STRING,
NAMEOFREGIO TYPE STRING,
NAMEOFCOUNTY TYPE STRING,
NAMEFORMAT TYPE STRING,
NAMEOFCOUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPIP0021TW_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_BAPIP0021TW_STR-EMPLOYEENO sy-vline 
WA_BAPIP0021TW_STR-SUBTYPE sy-vline 
WA_BAPIP0021TW_STR-OBJECTID sy-vline 
WA_BAPIP0021TW_STR-LOCKINDIC sy-vline 
WA_BAPIP0021TW_STR-VALIDEND sy-vline 
WA_BAPIP0021TW_STR-VALIDBEGIN sy-vline 
WA_BAPIP0021TW_STR-RECORDNR sy-vline 
WA_BAPIP0021TW_STR-MEMBERTYPE sy-vline 
WA_BAPIP0021TW_STR-NAMEFORMATIND sy-vline 
WA_BAPIP0021TW_STR-FIRSTNAME sy-vline 
WA_BAPIP0021TW_STR-LASTNAME sy-vline 
WA_BAPIP0021TW_STR-GENDER sy-vline 
WA_BAPIP0021TW_STR-NAMEINPASSPORT sy-vline 
WA_BAPIP0021TW_STR-CHINESENAME sy-vline 
WA_BAPIP0021TW_STR-NATIONALITY sy-vline 
WA_BAPIP0021TW_STR-DATEOFBIRTH sy-vline 
WA_BAPIP0021TW_STR-PLACEOFBIRTH sy-vline 
WA_BAPIP0021TW_STR-IDNUMBER sy-vline 
WA_BAPIP0021TW_STR-IDCHECK sy-vline 
WA_BAPIP0021TW_STR-RELATIONSHIP sy-vline 
WA_BAPIP0021TW_STR-NHIFORFAMILY sy-vline 
WA_BAPIP0021TW_STR-NHIVALIDDATE sy-vline 
WA_BAPIP0021TW_STR-NHISTATUS sy-vline 
WA_BAPIP0021TW_STR-NHISTREASON sy-vline 
WA_BAPIP0021TW_STR-NHIEXEMPT sy-vline 
WA_BAPIP0021TW_STR-EXEMPTREASON sy-vline 
WA_BAPIP0021TW_STR-DISABILITYLEV sy-vline 
WA_BAPIP0021TW_STR-ZIPCODE sy-vline 
WA_BAPIP0021TW_STR-COUNTRY sy-vline 
WA_BAPIP0021TW_STR-COUNTYCODE sy-vline 
WA_BAPIP0021TW_STR-REGION sy-vline 
WA_BAPIP0021TW_STR-STREET sy-vline 
WA_BAPIP0021TW_STR-TELEPHONENO sy-vline 
WA_BAPIP0021TW_STR-VILLAGE sy-vline 
WA_BAPIP0021TW_STR-NEIGHBOR sy-vline 
WA_BAPIP0021TW_STR-TOWN sy-vline 
WA_BAPIP0021TW_STR-FULLADDRESS sy-vline 
WA_BAPIP0021TW_STR-NAMEOFGENDER sy-vline 
WA_BAPIP0021TW_STR-ZIPCODENAME sy-vline 
WA_BAPIP0021TW_STR-IDCHECKTEXT sy-vline 
WA_BAPIP0021TW_STR-NHISTATUSTEXT sy-vline 
WA_BAPIP0021TW_STR-NHISTREASONTXT sy-vline 
WA_BAPIP0021TW_STR-EXEMPTREASONTX sy-vline 
WA_BAPIP0021TW_STR-DISABILITYTYPE sy-vline 
WA_BAPIP0021TW_STR-RELATIONSHIPTX sy-vline 
WA_BAPIP0021TW_STR-NATIONALITYTXT sy-vline 
WA_BAPIP0021TW_STR-NAMEOFMEMBERTY sy-vline 
WA_BAPIP0021TW_STR-NAMEOFLAND sy-vline 
WA_BAPIP0021TW_STR-NAMEOFREGIO sy-vline 
WA_BAPIP0021TW_STR-NAMEOFCOUNTY sy-vline 
WA_BAPIP0021TW_STR-NAMEFORMAT sy-vline 
WA_BAPIP0021TW_STR-NAMEOFCOUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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