ABAP Select data from SAP table ICL_LIMITS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICL_LIMITS 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_LIMITS. 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_LIMITS 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_LIMITS TYPE STANDARD TABLE OF ICL_LIMITS,
      WA_ICL_LIMITS TYPE ICL_LIMITS,
      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_LIMITS> TYPE ICL_LIMITS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICL_LIMITS
*  INTO TABLE @DATA(IT_ICL_LIMITS2).
*--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_LIMITS INDEX 1 INTO DATA(WA_ICL_LIMITS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICL_LIMITS>-CLAIM = 1.
<ICL_LIMITS>-SUBCLAIM = 1.
<ICL_LIMITS>-SUBCLTYPEN = 1.
<ICL_LIMITS>-LIMITPER = 1.
<ICL_LIMITS>-LIMITTOT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICL_LIMITS-CURR, sy-vline,
  WA_ICL_LIMITS-SUBCLTYPE, sy-vline,
  WA_ICL_LIMITS-COVERAGE, sy-vline,
  WA_ICL_LIMITS-BENTYPE, sy-vline,
  WA_ICL_LIMITS-CLTYPE, sy-vline,
  WA_ICL_LIMITS-CLTYPEG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICL_LIMITS 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_LIMITS 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_LIMITS INTO WA_ICL_LIMITS.


*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_LIMITS-CLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICL_LIMITS-CLAIM.
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_LIMITS_STR, 
CLAIM TYPE STRING,
SUBCLAIM TYPE STRING,
SUBCLTYPEN TYPE STRING,
LIMITPER TYPE STRING,
LIMITTOT TYPE STRING,
CURR TYPE STRING,
SUBCLTYPE TYPE STRING,
COVERAGE TYPE STRING,
BENTYPE TYPE STRING,
CLTYPE TYPE STRING,
CLTYPEG TYPE STRING,
CLTYPEV TYPE STRING,
JURISCOUNTRY TYPE STRING,
JURISREGION TYPE STRING,
POLPROD TYPE STRING,
GENERAT TYPE STRING,
VERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICL_LIMITS_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_LIMITS_STR-CLAIM sy-vline 
WA_ICL_LIMITS_STR-SUBCLAIM sy-vline 
WA_ICL_LIMITS_STR-SUBCLTYPEN sy-vline 
WA_ICL_LIMITS_STR-LIMITPER sy-vline 
WA_ICL_LIMITS_STR-LIMITTOT sy-vline 
WA_ICL_LIMITS_STR-CURR sy-vline 
WA_ICL_LIMITS_STR-SUBCLTYPE sy-vline 
WA_ICL_LIMITS_STR-COVERAGE sy-vline 
WA_ICL_LIMITS_STR-BENTYPE sy-vline 
WA_ICL_LIMITS_STR-CLTYPE sy-vline 
WA_ICL_LIMITS_STR-CLTYPEG sy-vline 
WA_ICL_LIMITS_STR-CLTYPEV sy-vline 
WA_ICL_LIMITS_STR-JURISCOUNTRY sy-vline 
WA_ICL_LIMITS_STR-JURISREGION sy-vline 
WA_ICL_LIMITS_STR-POLPROD sy-vline 
WA_ICL_LIMITS_STR-GENERAT sy-vline 
WA_ICL_LIMITS_STR-VERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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