ABAP Select data from SAP table ICLH_ICLHR4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICLH_ICLHR4 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_ICLHR4. 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_ICLHR4 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_ICLHR4 TYPE STANDARD TABLE OF ICLH_ICLHR4,
      WA_ICLH_ICLHR4 TYPE ICLH_ICLHR4,
      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_ICLHR4> TYPE ICLH_ICLHR4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ICLH_ICLHR4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ICLH_ICLHR4
  INTO TABLE IT_ICLH_ICLHR4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICLH_ICLHR4
*  INTO TABLE @DATA(IT_ICLH_ICLHR42).
*--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_ICLHR4 INDEX 1 INTO DATA(WA_ICLH_ICLHR42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ICLH_ICLHR4 ASSIGNING <ICLH_ICLHR4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICLH_ICLHR4>-SC_VARIANT_INV = 1.
<ICLH_ICLHR4>-SC_VARIANTN_INV = 1.
<ICLH_ICLHR4>-CLTYPE = 1.
<ICLH_ICLHR4>-GENERAT = 1.
<ICLH_ICLHR4>-VERSION = 1.

ENDLOOP.

LOOP AT IT_ICLH_ICLHR4 INTO WA_ICLH_ICLHR4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICLH_ICLHR4-SUBCLTYPE, sy-vline,
  WA_ICLH_ICLHR4-XSELECT, sy-vline,
  WA_ICLH_ICLHR4-PDOCTYPE, sy-vline,
  WA_ICLH_ICLHR4-XINVPAY, sy-vline,
  WA_ICLH_ICLHR4-CLAIM, sy-vline,
  WA_ICLH_ICLHR4-SUBCLAIM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICLH_ICLHR4 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_ICLHR4 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_ICLHR4 INTO WA_ICLH_ICLHR4.


*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_ICLH_ICLHR4-CLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICLH_ICLHR4-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_ICLH_ICLHR4_STR, 
SC_VARIANT_INV TYPE STRING,
SC_VARIANTN_INV TYPE STRING,
CLTYPE TYPE STRING,
GENERAT TYPE STRING,
VERSION TYPE STRING,
SUBCLTYPE TYPE STRING,
XSELECT TYPE STRING,
PDOCTYPE TYPE STRING,
XINVPAY TYPE STRING,
CLAIM TYPE STRING,
SUBCLAIM TYPE STRING,
SUBCLREF TYPE STRING,
PROCUREMENT TYPE STRING,
PROCUREMENT_PAY TYPE STRING,
ITEM TYPE STRING,
ITEM_PAY TYPE STRING,
SERVCATID_INV TYPE STRING,
SERVCATIDLN_INV TYPE STRING,
SCPOSID_INV TYPE STRING,
SCPOSLN_INV TYPE STRING,
SCPOSID_INT_INV TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICLH_ICLHR4_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_ICLHR4_STR-SC_VARIANT_INV sy-vline 
WA_ICLH_ICLHR4_STR-SC_VARIANTN_INV sy-vline 
WA_ICLH_ICLHR4_STR-CLTYPE sy-vline 
WA_ICLH_ICLHR4_STR-GENERAT sy-vline 
WA_ICLH_ICLHR4_STR-VERSION sy-vline 
WA_ICLH_ICLHR4_STR-SUBCLTYPE sy-vline 
WA_ICLH_ICLHR4_STR-XSELECT sy-vline 
WA_ICLH_ICLHR4_STR-PDOCTYPE sy-vline 
WA_ICLH_ICLHR4_STR-XINVPAY sy-vline 
WA_ICLH_ICLHR4_STR-CLAIM sy-vline 
WA_ICLH_ICLHR4_STR-SUBCLAIM sy-vline 
WA_ICLH_ICLHR4_STR-SUBCLREF sy-vline 
WA_ICLH_ICLHR4_STR-PROCUREMENT sy-vline 
WA_ICLH_ICLHR4_STR-PROCUREMENT_PAY sy-vline 
WA_ICLH_ICLHR4_STR-ITEM sy-vline 
WA_ICLH_ICLHR4_STR-ITEM_PAY sy-vline 
WA_ICLH_ICLHR4_STR-SERVCATID_INV sy-vline 
WA_ICLH_ICLHR4_STR-SERVCATIDLN_INV sy-vline 
WA_ICLH_ICLHR4_STR-SCPOSID_INV sy-vline 
WA_ICLH_ICLHR4_STR-SCPOSLN_INV sy-vline 
WA_ICLH_ICLHR4_STR-SCPOSID_INT_INV sy-vline      INTO ld_text SEPARATED BY SPACE.

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