ABAP Select data from SAP table ISTLGRPHDR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISTLGRPHDR
*  INTO TABLE @DATA(IT_ISTLGRPHDR2).
*--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_ISTLGRPHDR INDEX 1 INTO DATA(WA_ISTLGRPHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISTLGRPHDR>-MANDT = 1.
<ISTLGRPHDR>-SETTLEMENTDOCGROUPUUID = 1.
<ISTLGRPHDR>-SETTLEMENTGROUPID = 1.
<ISTLGRPHDR>-SETTLEMENTFISCALYEAR = 1.
<ISTLGRPHDR>-SETTLEMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISTLGRPHDR-SETTLMTDOCCAT, sy-vline,
  WA_ISTLGRPHDR-COUNTERPARTY, sy-vline,
  WA_ISTLGRPHDR-SIDE, sy-vline,
  WA_ISTLGRPHDR-SETTLEMENTAMOUNTCURRENCY, sy-vline,
  WA_ISTLGRPHDR-SETTLEMENTAMOUNT, sy-vline,
  WA_ISTLGRPHDR-INVOICEGROSSAMOUNT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISTLGRPHDR 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_ISTLGRPHDR 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_ISTLGRPHDR INTO WA_ISTLGRPHDR.


*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 SETTLEMENTGROUPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISTLGRPHDR-SETTLEMENTGROUPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLGRPHDR-SETTLEMENTGROUPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field COUNTERPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISTLGRPHDR-COUNTERPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLGRPHDR-COUNTERPARTY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field REFERENCEVENDOR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISTLGRPHDR-REFERENCEVENDOR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLGRPHDR-REFERENCEVENDOR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ABDNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISTLGRPHDR-ABDNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLGRPHDR-ABDNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CUSTOMERNUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISTLGRPHDR-CUSTOMERNUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLGRPHDR-CUSTOMERNUM.
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_ISTLGRPHDR_STR, 
MANDT TYPE STRING,
SETTLEMENTDOCGROUPUUID TYPE STRING,
SETTLEMENTGROUPID TYPE STRING,
SETTLEMENTFISCALYEAR TYPE STRING,
SETTLEMENTTYPE TYPE STRING,
SETTLMTDOCCAT TYPE STRING,
COUNTERPARTY TYPE STRING,
SIDE TYPE STRING,
SETTLEMENTAMOUNTCURRENCY TYPE STRING,
SETTLEMENTAMOUNT TYPE STRING,
INVOICEGROSSAMOUNT TYPE STRING,
TAXAMOUNT TYPE STRING,
IMAGEDOCUMENTNUMBER TYPE STRING,
SUPPLIERINVOICE TYPE STRING,
INVOICEDATE TYPE STRING,
INCOTERMS TYPE STRING,
INCOTERMSPART2 TYPE STRING,
SETTLEMENTGROUPPAYMENTTERMS TYPE STRING,
PRMTHBPAYMENTMETHOD TYPE STRING,
ALTERNATEPAYMENTTERM TYPE STRING,
PAYMENTDATE TYPE STRING,
ALTERNATEPAYMENTTYPE TYPE STRING,
COMPANYCODE TYPE STRING,
REFERENCEVENDOR TYPE STRING,
ABDNUMBER TYPE STRING,
SETTLEMENTSCENARIO TYPE STRING,
CUSTOMERNUM TYPE STRING,
SETTLEMENTGROUPTRANSLATIONDATE TYPE STRING,
CONTRACTPLANT TYPE STRING,
STOPSETTLEMENTISRELEASE TYPE STRING,
DPQSINSETTLEMENTINDICATOR TYPE STRING,
THRESHOLDPERCENTAGE TYPE STRING,
SETTLEMENTISCOUNTERPARTYREVIEW TYPE STRING,
REASONCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISTLGRPHDR_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_ISTLGRPHDR_STR-MANDT sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTDOCGROUPUUID sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTGROUPID sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTFISCALYEAR sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTTYPE sy-vline 
WA_ISTLGRPHDR_STR-SETTLMTDOCCAT sy-vline 
WA_ISTLGRPHDR_STR-COUNTERPARTY sy-vline 
WA_ISTLGRPHDR_STR-SIDE sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTAMOUNTCURRENCY sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTAMOUNT sy-vline 
WA_ISTLGRPHDR_STR-INVOICEGROSSAMOUNT sy-vline 
WA_ISTLGRPHDR_STR-TAXAMOUNT sy-vline 
WA_ISTLGRPHDR_STR-IMAGEDOCUMENTNUMBER sy-vline 
WA_ISTLGRPHDR_STR-SUPPLIERINVOICE sy-vline 
WA_ISTLGRPHDR_STR-INVOICEDATE sy-vline 
WA_ISTLGRPHDR_STR-INCOTERMS sy-vline 
WA_ISTLGRPHDR_STR-INCOTERMSPART2 sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTGROUPPAYMENTTERMS sy-vline 
WA_ISTLGRPHDR_STR-PRMTHBPAYMENTMETHOD sy-vline 
WA_ISTLGRPHDR_STR-ALTERNATEPAYMENTTERM sy-vline 
WA_ISTLGRPHDR_STR-PAYMENTDATE sy-vline 
WA_ISTLGRPHDR_STR-ALTERNATEPAYMENTTYPE sy-vline 
WA_ISTLGRPHDR_STR-COMPANYCODE sy-vline 
WA_ISTLGRPHDR_STR-REFERENCEVENDOR sy-vline 
WA_ISTLGRPHDR_STR-ABDNUMBER sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTSCENARIO sy-vline 
WA_ISTLGRPHDR_STR-CUSTOMERNUM sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTGROUPTRANSLATIONDATE sy-vline 
WA_ISTLGRPHDR_STR-CONTRACTPLANT sy-vline 
WA_ISTLGRPHDR_STR-STOPSETTLEMENTISRELEASE sy-vline 
WA_ISTLGRPHDR_STR-DPQSINSETTLEMENTINDICATOR sy-vline 
WA_ISTLGRPHDR_STR-THRESHOLDPERCENTAGE sy-vline 
WA_ISTLGRPHDR_STR-SETTLEMENTISCOUNTERPARTYREVIEW sy-vline 
WA_ISTLGRPHDR_STR-REASONCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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