ABAP Select data from SAP table ICLH_LVC_GP_BASE_APPROVAL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICLH_LVC_GP_BASE_APPROVAL 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_GP_BASE_APPROVAL. 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_GP_BASE_APPROVAL 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_GP_BASE_APPROVAL TYPE STANDARD TABLE OF ICLH_LVC_GP_BASE_APPROVAL,
      WA_ICLH_LVC_GP_BASE_APPROVAL TYPE ICLH_LVC_GP_BASE_APPROVAL,
      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_GP_BASE_APPROVAL> TYPE ICLH_LVC_GP_BASE_APPROVAL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLH_LVC_GP_BASE_APPROVAL
*  INTO TABLE @DATA(IT_ICLH_LVC_GP_BASE_APPROVAL2).
*--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_GP_BASE_APPROVAL INDEX 1 INTO DATA(WA_ICLH_LVC_GP_BASE_APPROVAL2).


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

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

ENDLOOP.

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

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


*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 UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ICLH_LVC_GP_BASE_APPROVAL-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLH_LVC_GP_BASE_APPROVAL-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_ICLH_LVC_GP_BASE_APPROVAL_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,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
TOTAL TYPE STRING,
TOTAL_APP TYPE STRING,
QUAN TYPE STRING,
UNIT TYPE STRING,
PDOCTYPE TYPE STRING,
ITEMUSE TYPE STRING,
ITEMUSEN TYPE STRING,
TAXCODE TYPE STRING,
TAXCODEN TYPE STRING,
PRICEPERUNIT TYPE STRING,
PRICE TYPE STRING,
TAXCODEA TYPE STRING,
TAXCODEAN TYPE STRING,
PRICEAPERUNIT TYPE STRING,
PRICEA TYPE STRING,
CURR TYPE STRING,
REJREASON TYPE STRING,
REJREASONN TYPE STRING,
NODE_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICLH_LVC_GP_BASE_APPROVAL_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_GP_BASE_APPROVAL_STR-DETAIL_SELECT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-ITEM sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-CT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-SUBCLAIM sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-PROCUREMENT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-BENTYPE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-BENTYPEN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-COVTYPE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-COVTYPEN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-COVERAGE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-COVERAGEN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-SERVCATID sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-SERVCATIDLN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-SCPOSID sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-SCPOSLN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-SCPOSID_INT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-VALIDFROM sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-VALIDTO sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-TOTAL sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-TOTAL_APP sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-QUAN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-UNIT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-PDOCTYPE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-ITEMUSE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-ITEMUSEN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-TAXCODE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-TAXCODEN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-PRICEPERUNIT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-PRICE sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-TAXCODEA sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-TAXCODEAN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-PRICEAPERUNIT sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-PRICEA sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-CURR sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-REJREASON sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-REJREASONN sy-vline 
WA_ICLH_LVC_GP_BASE_APPROVAL_STR-NODE_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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