ABAP Select data from SAP table ICL_WCMPD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_WCMPD
*  INTO TABLE @DATA(IT_ICL_WCMPD2).
*--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_ICL_WCMPD INDEX 1 INTO DATA(WA_ICL_WCMPD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_WCMPD>-MANDT = 1.
<ICL_WCMPD>-ACTIVE = 1.
<ICL_WCMPD>-CLAIM = 1.
<ICL_WCMPD>-SUBCLAIM = 1.
<ICL_WCMPD>-WCMPH_SEQNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_WCMPD-WCMPD_SEQNUM, sy-vline,
  WA_ICL_WCMPD-CHANGETIME, sy-vline,
  WA_ICL_WCMPD-CHANGEDBY, sy-vline,
  WA_ICL_WCMPD-DELETED, sy-vline,
  WA_ICL_WCMPD-ITEMCAT, sy-vline,
  WA_ICL_WCMPD-CURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_WCMPD 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_ICL_WCMPD 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_ICL_WCMPD INTO WA_ICL_WCMPD.


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

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

*Conversion exit CUNIT, internal->external for field SCHEDULED_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICL_WCMPD-SCHEDULED_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_WCMPD-SCHEDULED_UNIT.
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_ICL_WCMPD_STR, 
MANDT TYPE STRING,
ACTIVE TYPE STRING,
CLAIM TYPE STRING,
SUBCLAIM TYPE STRING,
WCMPH_SEQNUM TYPE STRING,
WCMPD_SEQNUM TYPE STRING,
CHANGETIME TYPE STRING,
CHANGEDBY TYPE STRING,
DELETED TYPE STRING,
ITEMCAT TYPE STRING,
CURRENCY TYPE STRING,
SAWW TYPE STRING,
MIN_BEN TYPE STRING,
MAX_BEN TYPE STRING,
PERCENT TYPE STRING,
MAX_PERIOD TYPE STRING,
MAX_TOTAL TYPE STRING,
PAYMENT_AMT TYPE STRING,
PAY_AMT_OFF TYPE STRING,
NUMFULLPAYM TYPE STRING,
NUMPARTPAYM TYPE STRING,
PAYM_PARTIAL TYPE STRING,
BENEFIT_OFFSET TYPE STRING,
RETRO_AMT TYPE STRING,
PMTFR TYPE STRING,
PMTTO TYPE STRING,
PAYM_TOTAL TYPE STRING,
BURIAL_AMOUNT TYPE STRING,
TRANSPORTN_MAX TYPE STRING,
LUMP_SUM TYPE STRING,
TOTAL_AMT TYPE STRING,
CHLD_MAX_AGE TYPE STRING,
STDNT_MAX_AGE TYPE STRING,
SCHEDULED_PERIOD TYPE STRING,
SCHEDULED_UNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_WCMPD_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_ICL_WCMPD_STR-MANDT sy-vline 
WA_ICL_WCMPD_STR-ACTIVE sy-vline 
WA_ICL_WCMPD_STR-CLAIM sy-vline 
WA_ICL_WCMPD_STR-SUBCLAIM sy-vline 
WA_ICL_WCMPD_STR-WCMPH_SEQNUM sy-vline 
WA_ICL_WCMPD_STR-WCMPD_SEQNUM sy-vline 
WA_ICL_WCMPD_STR-CHANGETIME sy-vline 
WA_ICL_WCMPD_STR-CHANGEDBY sy-vline 
WA_ICL_WCMPD_STR-DELETED sy-vline 
WA_ICL_WCMPD_STR-ITEMCAT sy-vline 
WA_ICL_WCMPD_STR-CURRENCY sy-vline 
WA_ICL_WCMPD_STR-SAWW sy-vline 
WA_ICL_WCMPD_STR-MIN_BEN sy-vline 
WA_ICL_WCMPD_STR-MAX_BEN sy-vline 
WA_ICL_WCMPD_STR-PERCENT sy-vline 
WA_ICL_WCMPD_STR-MAX_PERIOD sy-vline 
WA_ICL_WCMPD_STR-MAX_TOTAL sy-vline 
WA_ICL_WCMPD_STR-PAYMENT_AMT sy-vline 
WA_ICL_WCMPD_STR-PAY_AMT_OFF sy-vline 
WA_ICL_WCMPD_STR-NUMFULLPAYM sy-vline 
WA_ICL_WCMPD_STR-NUMPARTPAYM sy-vline 
WA_ICL_WCMPD_STR-PAYM_PARTIAL sy-vline 
WA_ICL_WCMPD_STR-BENEFIT_OFFSET sy-vline 
WA_ICL_WCMPD_STR-RETRO_AMT sy-vline 
WA_ICL_WCMPD_STR-PMTFR sy-vline 
WA_ICL_WCMPD_STR-PMTTO sy-vline 
WA_ICL_WCMPD_STR-PAYM_TOTAL sy-vline 
WA_ICL_WCMPD_STR-BURIAL_AMOUNT sy-vline 
WA_ICL_WCMPD_STR-TRANSPORTN_MAX sy-vline 
WA_ICL_WCMPD_STR-LUMP_SUM sy-vline 
WA_ICL_WCMPD_STR-TOTAL_AMT sy-vline 
WA_ICL_WCMPD_STR-CHLD_MAX_AGE sy-vline 
WA_ICL_WCMPD_STR-STDNT_MAX_AGE sy-vline 
WA_ICL_WCMPD_STR-SCHEDULED_PERIOD sy-vline 
WA_ICL_WCMPD_STR-SCHEDULED_UNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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