ABAP Select data from SAP table ICLPOLOWA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLPOLOWA
*  INTO TABLE @DATA(IT_ICLPOLOWA2).
*--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_ICLPOLOWA INDEX 1 INTO DATA(WA_ICLPOLOWA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICLPOLOWA>-CLIENT = 1.
<ICLPOLOWA>-ACTIVE = 1.
<ICLPOLOWA>-CLAIM = 1.
<ICLPOLOWA>-POLVNR = 1.
<ICLPOLOWA>-INSUREDOBJ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICLPOLOWA-CHANGETIME, sy-vline,
  WA_ICLPOLOWA-CHANGEDBY, sy-vline,
  WA_ICLPOLOWA-DELETED, sy-vline,
  WA_ICLPOLOWA-NAME, sy-vline,
  WA_ICLPOLOWA-MFRHULLNO, sy-vline,
  WA_ICLPOLOWA-HULLMATERIAL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICLPOLOWA 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_ICLPOLOWA 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_ICLPOLOWA INTO WA_ICLPOLOWA.


*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_ICLPOLOWA-CLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLPOLOWA-CLAIM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTAM, internal->external for field CHANGETIME
CALL FUNCTION 'CONVERSION_EXIT_TSTAM_OUTPUT'
  EXPORTING
    input =                      WA_ICLPOLOWA-CHANGETIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLPOLOWA-CHANGETIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field LENGTHUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICLPOLOWA-LENGTHUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLPOLOWA-LENGTHUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field POWERUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICLPOLOWA-POWERUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLPOLOWA-POWERUNIT.
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_ICLPOLOWA_STR, 
CLIENT TYPE STRING,
ACTIVE TYPE STRING,
CLAIM TYPE STRING,
POLVNR TYPE STRING,
INSUREDOBJ TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,
DELETED TYPE STRING,
NAME TYPE STRING,
MFRHULLNO TYPE STRING,
HULLMATERIAL TYPE STRING,
WATCRAMAKE TYPE STRING,
WATCRAMODEL TYPE STRING,
WATCRANO TYPE STRING,
CONSTYEAR TYPE STRING,
LENGTHUNIT TYPE STRING,
LENGTH TYPE STRING,
WIDTH TYPE STRING,
DEPTH TYPE STRING,
ENGINEMAKE TYPE STRING,
ENGINEMODEL TYPE STRING,
ENGINEYEAR TYPE STRING,
POWERUNIT TYPE STRING,
POWER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICLPOLOWA_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_ICLPOLOWA_STR-CLIENT sy-vline 
WA_ICLPOLOWA_STR-ACTIVE sy-vline 
WA_ICLPOLOWA_STR-CLAIM sy-vline 
WA_ICLPOLOWA_STR-POLVNR sy-vline 
WA_ICLPOLOWA_STR-INSUREDOBJ sy-vline 
WA_ICLPOLOWA_STR-CHANGETIME sy-vline 
WA_ICLPOLOWA_STR-CHANGEDBY sy-vline 
WA_ICLPOLOWA_STR-DELETED sy-vline 
WA_ICLPOLOWA_STR-NAME sy-vline 
WA_ICLPOLOWA_STR-MFRHULLNO sy-vline 
WA_ICLPOLOWA_STR-HULLMATERIAL sy-vline 
WA_ICLPOLOWA_STR-WATCRAMAKE sy-vline 
WA_ICLPOLOWA_STR-WATCRAMODEL sy-vline 
WA_ICLPOLOWA_STR-WATCRANO sy-vline 
WA_ICLPOLOWA_STR-CONSTYEAR sy-vline 
WA_ICLPOLOWA_STR-LENGTHUNIT sy-vline 
WA_ICLPOLOWA_STR-LENGTH sy-vline 
WA_ICLPOLOWA_STR-WIDTH sy-vline 
WA_ICLPOLOWA_STR-DEPTH sy-vline 
WA_ICLPOLOWA_STR-ENGINEMAKE sy-vline 
WA_ICLPOLOWA_STR-ENGINEMODEL sy-vline 
WA_ICLPOLOWA_STR-ENGINEYEAR sy-vline 
WA_ICLPOLOWA_STR-POWERUNIT sy-vline 
WA_ICLPOLOWA_STR-POWER sy-vline      INTO ld_text SEPARATED BY SPACE.

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