ABAP Select data from SAP table PS3421 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PS3421 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 PS3421. 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 PS3421 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_PS3421 TYPE STANDARD TABLE OF PS3421,
      WA_PS3421 TYPE PS3421,
      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: <PS3421> TYPE PS3421.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PS3421.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PS3421
  INTO TABLE IT_PS3421.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PS3421
*  INTO TABLE @DATA(IT_PS34212).
*--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_PS3421 INDEX 1 INTO DATA(WA_PS34212).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PS3421 ASSIGNING <PS3421>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PS3421>-ZLA_ID1 = 1.
<PS3421>-ZLA_ID2 = 1.
<PS3421>-PESEL = 1.
<PS3421>-FIRST_NAME = 1.
<PS3421>-LAST_NAME = 1.

ENDLOOP.

LOOP AT IT_PS3421 INTO WA_PS3421.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PS3421-INSURANCE_ORG, sy-vline,
  WA_PS3421-PASSPORT, sy-vline,
  WA_PS3421-BIRTH_DATE, sy-vline,
  WA_PS3421-ZIP_CODE, sy-vline,
  WA_PS3421-CITY, sy-vline,
  WA_PS3421-STREET, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PS3421 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_PS3421 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_PS3421 INTO WA_PS3421.


*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 DOCSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PS3421-DOCSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PS3421-DOCSY.
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_PS3421_STR, 
ZLA_ID1 TYPE STRING,
ZLA_ID2 TYPE STRING,
PESEL TYPE STRING,
FIRST_NAME TYPE STRING,
LAST_NAME TYPE STRING,
INSURANCE_ORG TYPE STRING,
PASSPORT TYPE STRING,
BIRTH_DATE TYPE STRING,
ZIP_CODE TYPE STRING,
CITY TYPE STRING,
STREET TYPE STRING,
HOUSE TYPE STRING,
FLAT TYPE STRING,
BEGDH TYPE STRING,
ENDDH TYPE STRING,
INSTRUCTION TYPE STRING,
CODE TYPE STRING,
ILLNESS_CODE TYPE STRING,
FAMILY_TYPE TYPE STRING,
BIRTH_DATE2 TYPE STRING,
ID_TYPE2 TYPE STRING,
ID2 TYPE STRING,
NAME2 TYPE STRING,
ZIP_CODE2 TYPE STRING,
CITY2 TYPE STRING,
STREET2 TYPE STRING,
HOUSE2 TYPE STRING,
FLAT2 TYPE STRING,
DOCTOR_ID TYPE STRING,
DOCTOR_FNAME TYPE STRING,
DOCTOR_INAME TYPE STRING,
ZLA_DATE TYPE STRING,
DLDATE TYPE STRING,
DLTIME TYPE STRING,
LOCKTR TYPE STRING,
STATUS TYPE STRING,
DOCSY TYPE STRING,
DOCNR TYPE STRING,
ZUSSTAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PS3421_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_PS3421_STR-ZLA_ID1 sy-vline 
WA_PS3421_STR-ZLA_ID2 sy-vline 
WA_PS3421_STR-PESEL sy-vline 
WA_PS3421_STR-FIRST_NAME sy-vline 
WA_PS3421_STR-LAST_NAME sy-vline 
WA_PS3421_STR-INSURANCE_ORG sy-vline 
WA_PS3421_STR-PASSPORT sy-vline 
WA_PS3421_STR-BIRTH_DATE sy-vline 
WA_PS3421_STR-ZIP_CODE sy-vline 
WA_PS3421_STR-CITY sy-vline 
WA_PS3421_STR-STREET sy-vline 
WA_PS3421_STR-HOUSE sy-vline 
WA_PS3421_STR-FLAT sy-vline 
WA_PS3421_STR-BEGDH sy-vline 
WA_PS3421_STR-ENDDH sy-vline 
WA_PS3421_STR-INSTRUCTION sy-vline 
WA_PS3421_STR-CODE sy-vline 
WA_PS3421_STR-ILLNESS_CODE sy-vline 
WA_PS3421_STR-FAMILY_TYPE sy-vline 
WA_PS3421_STR-BIRTH_DATE2 sy-vline 
WA_PS3421_STR-ID_TYPE2 sy-vline 
WA_PS3421_STR-ID2 sy-vline 
WA_PS3421_STR-NAME2 sy-vline 
WA_PS3421_STR-ZIP_CODE2 sy-vline 
WA_PS3421_STR-CITY2 sy-vline 
WA_PS3421_STR-STREET2 sy-vline 
WA_PS3421_STR-HOUSE2 sy-vline 
WA_PS3421_STR-FLAT2 sy-vline 
WA_PS3421_STR-DOCTOR_ID sy-vline 
WA_PS3421_STR-DOCTOR_FNAME sy-vline 
WA_PS3421_STR-DOCTOR_INAME sy-vline 
WA_PS3421_STR-ZLA_DATE sy-vline 
WA_PS3421_STR-DLDATE sy-vline 
WA_PS3421_STR-DLTIME sy-vline 
WA_PS3421_STR-LOCKTR sy-vline 
WA_PS3421_STR-STATUS sy-vline 
WA_PS3421_STR-DOCSY sy-vline 
WA_PS3421_STR-DOCNR sy-vline 
WA_PS3421_STR-ZUSSTAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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