ABAP Select data from SAP table ICLH_LVC_TRAVEL_APPR into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLH_LVC_TRAVEL_APPR
*  INTO TABLE @DATA(IT_ICLH_LVC_TRAVEL_APPR2).
*--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_ICLH_LVC_TRAVEL_APPR INDEX 1 INTO DATA(WA_ICLH_LVC_TRAVEL_APPR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICLH_LVC_TRAVEL_APPR>-DETAIL_SELECT = 1.
<ICLH_LVC_TRAVEL_APPR>-ITEM = 1.
<ICLH_LVC_TRAVEL_APPR>-CT = 1.
<ICLH_LVC_TRAVEL_APPR>-SUBCLAIM = 1.
<ICLH_LVC_TRAVEL_APPR>-PROCUREMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICLH_LVC_TRAVEL_APPR-BENTYPE, sy-vline,
  WA_ICLH_LVC_TRAVEL_APPR-BENTYPEN, sy-vline,
  WA_ICLH_LVC_TRAVEL_APPR-COVTYPE, sy-vline,
  WA_ICLH_LVC_TRAVEL_APPR-COVTYPEN, sy-vline,
  WA_ICLH_LVC_TRAVEL_APPR-COVERAGE, sy-vline,
  WA_ICLH_LVC_TRAVEL_APPR-COVERAGEN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICLH_LVC_TRAVEL_APPR 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_ICLH_LVC_TRAVEL_APPR 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_ICLH_LVC_TRAVEL_APPR INTO WA_ICLH_LVC_TRAVEL_APPR.


*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 CUNIT, internal->external for field EVQUANUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICLH_LVC_TRAVEL_APPR-EVQUANUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLH_LVC_TRAVEL_APPR-EVQUANUNIT.
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_ICLH_LVC_TRAVEL_APPR_STR, 
DETAIL_SELECT TYPE STRING,
ITEM TYPE STRING,
CT TYPE STRING,
SUBCLAIM TYPE STRING,
PROCUREMENT TYPE STRING,
BENTYPE TYPE STRING,
BENTYPEN TYPE STRING,
COVTYPE TYPE STRING,
COVTYPEN TYPE STRING,
COVERAGE TYPE STRING,
COVERAGEN TYPE STRING,
SERVCATID TYPE STRING,
SERVCATIDLN TYPE STRING,
SCPOSID TYPE STRING,
SCPOSLN TYPE STRING,
SCPOSID_INT TYPE STRING,
DNUMBER TYPE STRING,
EVQUANTITY TYPE STRING,
EVQUANUNIT TYPE STRING,
EVAMTPERUNIT TYPE STRING,
EVAMOUNT TYPE STRING,
EVCURR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICLH_LVC_TRAVEL_APPR_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_ICLH_LVC_TRAVEL_APPR_STR-DETAIL_SELECT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-ITEM sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-CT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-SUBCLAIM sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-PROCUREMENT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-BENTYPE sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-BENTYPEN sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-COVTYPE sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-COVTYPEN sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-COVERAGE sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-COVERAGEN sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-SERVCATID sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-SERVCATIDLN sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-SCPOSID sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-SCPOSLN sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-SCPOSID_INT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-DNUMBER sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-EVQUANTITY sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-EVQUANUNIT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-EVAMTPERUNIT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-EVAMOUNT sy-vline 
WA_ICLH_LVC_TRAVEL_APPR_STR-EVCURR sy-vline      INTO ld_text SEPARATED BY SPACE.

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