ABAP Select data from SAP table ICLPOLPD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLPOLPD
*  INTO TABLE @DATA(IT_ICLPOLPD2).
*--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_ICLPOLPD INDEX 1 INTO DATA(WA_ICLPOLPD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICLPOLPD>-CLIENT = 1.
<ICLPOLPD>-ACTIVE = 1.
<ICLPOLPD>-CLAIM = 1.
<ICLPOLPD>-PARTICIPANT = 1.
<ICLPOLPD>-CHANGETIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICLPOLPD-CHANGEDBY, sy-vline,
  WA_ICLPOLPD-DELETED, sy-vline,
  WA_ICLPOLPD-ISSUEDATE, sy-vline,
  WA_ICLPOLPD-BIRTHDATE, sy-vline,
  WA_ICLPOLPD-OCCUP1, sy-vline,
  WA_ICLPOLPD-OCCUP2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICLPOLPD 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_ICLPOLPD 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_ICLPOLPD INTO WA_ICLPOLPD.


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

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

*Conversion exit TSTAM, internal->external for field CHANGETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICLPOLPD-CHANGETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLPOLPD-CHANGETIME.
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_ICLPOLPD_STR, 
CLIENT TYPE STRING,
ACTIVE TYPE STRING,
CLAIM TYPE STRING,
PARTICIPANT TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,
DELETED TYPE STRING,
ISSUEDATE TYPE STRING,
BIRTHDATE TYPE STRING,
OCCUP1 TYPE STRING,
OCCUP2 TYPE STRING,
MAINNDRV TYPE STRING,
LICENCE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICLPOLPD_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_ICLPOLPD_STR-CLIENT sy-vline 
WA_ICLPOLPD_STR-ACTIVE sy-vline 
WA_ICLPOLPD_STR-CLAIM sy-vline 
WA_ICLPOLPD_STR-PARTICIPANT sy-vline 
WA_ICLPOLPD_STR-CHANGETIME sy-vline 
WA_ICLPOLPD_STR-CHANGEDBY sy-vline 
WA_ICLPOLPD_STR-DELETED sy-vline 
WA_ICLPOLPD_STR-ISSUEDATE sy-vline 
WA_ICLPOLPD_STR-BIRTHDATE sy-vline 
WA_ICLPOLPD_STR-OCCUP1 sy-vline 
WA_ICLPOLPD_STR-OCCUP2 sy-vline 
WA_ICLPOLPD_STR-MAINNDRV sy-vline 
WA_ICLPOLPD_STR-LICENCE sy-vline      INTO ld_text SEPARATED BY SPACE.

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