ABAP Select data from SAP table BUS_MASS_PERS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BUS_MASS_PERS
*  INTO TABLE @DATA(IT_BUS_MASS_PERS2).
*--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_BUS_MASS_PERS INDEX 1 INTO DATA(WA_BUS_MASS_PERS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BUS_MASS_PERS>-PERSNUMBER = 1.
<BUS_MASS_PERS>-ADDRNUMBER = 1.
<BUS_MASS_PERS>-NATION = 1.
<BUS_MASS_PERS>-FIRSTNAME = 1.
<BUS_MASS_PERS>-LASTNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BUS_MASS_PERS-BIRTHNAME, sy-vline,
  WA_BUS_MASS_PERS-MIDDLENAME, sy-vline,
  WA_BUS_MASS_PERS-SECONDNAME, sy-vline,
  WA_BUS_MASS_PERS-TITLE_ACA1, sy-vline,
  WA_BUS_MASS_PERS-TITLE_ACA2, sy-vline,
  WA_BUS_MASS_PERS-TITLE_SPPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BUS_MASS_PERS 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_BUS_MASS_PERS 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_BUS_MASS_PERS INTO WA_BUS_MASS_PERS.


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

*Conversion exit ALPHA, internal->external for field ADDRNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BUS_MASS_PERS-ADDRNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUS_MASS_PERS-ADDRNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field CORRESPONDLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_BUS_MASS_PERS-CORRESPONDLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BUS_MASS_PERS-CORRESPONDLANGUAGE.
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_BUS_MASS_PERS_STR, 
PERSNUMBER TYPE STRING,
ADDRNUMBER TYPE STRING,
NATION TYPE STRING,
FIRSTNAME TYPE STRING,
LASTNAME TYPE STRING,
BIRTHNAME TYPE STRING,
MIDDLENAME TYPE STRING,
SECONDNAME TYPE STRING,
TITLE_ACA1 TYPE STRING,
TITLE_ACA2 TYPE STRING,
TITLE_SPPL TYPE STRING,
PREFIX1 TYPE STRING,
PREFIX2 TYPE STRING,
NICKNAME TYPE STRING,
INITIALS TYPE STRING,
NAMEFORMAT TYPE STRING,
NAMCOUNTRY TYPE STRING,
NAMCOUNTRYISO TYPE STRING,
SEX TYPE STRING,
BIRTHPLACE TYPE STRING,
BIRTHDATE TYPE STRING,
DEATHDATE TYPE STRING,
MARITALSTATUS TYPE STRING,
CORRESPONDLANGUAGE TYPE STRING,
CORRESPONDLANGUAGEISO TYPE STRING,
FULLNAME TYPE STRING,
EMPLOYER TYPE STRING,
OCCUPATION TYPE STRING,
NATIONALITY TYPE STRING,
NATIONALITYISO TYPE STRING,
COUNTRYORIGIN TYPE STRING,
BIRTHDT_STATUS TYPE STRING,
GENDER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BUS_MASS_PERS_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_BUS_MASS_PERS_STR-PERSNUMBER sy-vline 
WA_BUS_MASS_PERS_STR-ADDRNUMBER sy-vline 
WA_BUS_MASS_PERS_STR-NATION sy-vline 
WA_BUS_MASS_PERS_STR-FIRSTNAME sy-vline 
WA_BUS_MASS_PERS_STR-LASTNAME sy-vline 
WA_BUS_MASS_PERS_STR-BIRTHNAME sy-vline 
WA_BUS_MASS_PERS_STR-MIDDLENAME sy-vline 
WA_BUS_MASS_PERS_STR-SECONDNAME sy-vline 
WA_BUS_MASS_PERS_STR-TITLE_ACA1 sy-vline 
WA_BUS_MASS_PERS_STR-TITLE_ACA2 sy-vline 
WA_BUS_MASS_PERS_STR-TITLE_SPPL sy-vline 
WA_BUS_MASS_PERS_STR-PREFIX1 sy-vline 
WA_BUS_MASS_PERS_STR-PREFIX2 sy-vline 
WA_BUS_MASS_PERS_STR-NICKNAME sy-vline 
WA_BUS_MASS_PERS_STR-INITIALS sy-vline 
WA_BUS_MASS_PERS_STR-NAMEFORMAT sy-vline 
WA_BUS_MASS_PERS_STR-NAMCOUNTRY sy-vline 
WA_BUS_MASS_PERS_STR-NAMCOUNTRYISO sy-vline 
WA_BUS_MASS_PERS_STR-SEX sy-vline 
WA_BUS_MASS_PERS_STR-BIRTHPLACE sy-vline 
WA_BUS_MASS_PERS_STR-BIRTHDATE sy-vline 
WA_BUS_MASS_PERS_STR-DEATHDATE sy-vline 
WA_BUS_MASS_PERS_STR-MARITALSTATUS sy-vline 
WA_BUS_MASS_PERS_STR-CORRESPONDLANGUAGE sy-vline 
WA_BUS_MASS_PERS_STR-CORRESPONDLANGUAGEISO sy-vline 
WA_BUS_MASS_PERS_STR-FULLNAME sy-vline 
WA_BUS_MASS_PERS_STR-EMPLOYER sy-vline 
WA_BUS_MASS_PERS_STR-OCCUPATION sy-vline 
WA_BUS_MASS_PERS_STR-NATIONALITY sy-vline 
WA_BUS_MASS_PERS_STR-NATIONALITYISO sy-vline 
WA_BUS_MASS_PERS_STR-COUNTRYORIGIN sy-vline 
WA_BUS_MASS_PERS_STR-BIRTHDT_STATUS sy-vline 
WA_BUS_MASS_PERS_STR-GENDER sy-vline      INTO ld_text SEPARATED BY SPACE.

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