ABAP Select data from SAP table ISTLUNITHDRDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISTLUNITHDRDET
*  INTO TABLE @DATA(IT_ISTLUNITHDRDET2).
*--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_ISTLUNITHDRDET INDEX 1 INTO DATA(WA_ISTLUNITHDRDET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISTLUNITHDRDET>-MANDT = 1.
<ISTLUNITHDRDET>-SETTLEMENTDOCHEADERUUID = 1.
<ISTLUNITHDRDET>-SETTLMTDOC = 1.
<ISTLUNITHDRDET>-SETTLMTDOCYEAR = 1.
<ISTLUNITHDRDET>-CONTRACTAPPLICATIONDOCUMENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISTLUNITHDRDET-SOLDTOPARTY, sy-vline,
  WA_ISTLUNITHDRDET-PAYERPARTY, sy-vline,
  WA_ISTLUNITHDRDET-BILLTOPARTY, sy-vline,
  WA_ISTLUNITHDRDET-REFERENCEVENDOR, sy-vline,
  WA_ISTLUNITHDRDET-REFERENCEPAYER, sy-vline,
  WA_ISTLUNITHDRDET-ACMSETTLEMENTDOCREFERENCEPARTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISTLUNITHDRDET 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_ISTLUNITHDRDET 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_ISTLUNITHDRDET INTO WA_ISTLUNITHDRDET.


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

*Conversion exit GJAHR, internal->external for field SETTLMTDOCYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISTLUNITHDRDET-SETTLMTDOCYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLUNITHDRDET-SETTLMTDOCYEAR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field ABDNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISTLUNITHDRDET-ABDNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTLUNITHDRDET-ABDNUMBER.
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_ISTLUNITHDRDET_STR, 
MANDT TYPE STRING,
SETTLEMENTDOCHEADERUUID TYPE STRING,
SETTLMTDOC TYPE STRING,
SETTLMTDOCYEAR TYPE STRING,
CONTRACTAPPLICATIONDOCUMENT TYPE STRING,
SOLDTOPARTY TYPE STRING,
PAYERPARTY TYPE STRING,
BILLTOPARTY TYPE STRING,
REFERENCEVENDOR TYPE STRING,
REFERENCEPAYER TYPE STRING,
ACMSETTLEMENTDOCREFERENCEPARTY TYPE STRING,
COUNTERPARTYFULLNAME TYPE STRING,
ACMSETTLEMENTDOCUMENTTYPE TYPE STRING,
APPLICATIONDOCTYPEDESCRIPTION TYPE STRING,
ACMREFERENCESETTLEMENTCATEGORY TYPE STRING,
DOCUMENTCATEGORYTEXT TYPE STRING,
CUSTOMERCOUNTRYKEY TYPE STRING,
COMPANYCOUNTRYNAME TYPE STRING,
REGION TYPE STRING,
REGIONNAME TYPE STRING,
ABDNUMBER TYPE STRING,
SIDE TYPE STRING,
DOCUMENTSIDE TYPE STRING,
SETTLEMENTSCENARIO TYPE STRING,
SETTLEMENTSCENARIONAME TYPE STRING,
SETTLEMENTPOSTINGDATE TYPE STRING,
SETTLEMENTCURRENCY TYPE STRING,
ACMSETTLEMENTUNITNETAMOUNT TYPE STRING,
ACMSETTLEMENTNETORDERAMOUNT TYPE STRING,
ACMSETTLEMENTUNITGROSSAMOUNT TYPE STRING,
THRESHOLDPERCENTAGE TYPE STRING,
ACMSETTLEMENTDPQSINDICATORTEXT TYPE STRING,
DPQSINSETTLEMENTINDICATOR TYPE STRING,
ACMSETTLEMENTUNITISIGNOREDPQS TYPE STRING,
ACMSETTLMTISFNLSEPARATEINVCFEE TYPE STRING,
CONTRACTAPPLICATIONUUID TYPE STRING,
CONTRACTAPPLICATIONVERSION TYPE STRING,
APPLITEMCREATEDONDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISTLUNITHDRDET_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_ISTLUNITHDRDET_STR-MANDT sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLEMENTDOCHEADERUUID sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLMTDOC sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLMTDOCYEAR sy-vline 
WA_ISTLUNITHDRDET_STR-CONTRACTAPPLICATIONDOCUMENT sy-vline 
WA_ISTLUNITHDRDET_STR-SOLDTOPARTY sy-vline 
WA_ISTLUNITHDRDET_STR-PAYERPARTY sy-vline 
WA_ISTLUNITHDRDET_STR-BILLTOPARTY sy-vline 
WA_ISTLUNITHDRDET_STR-REFERENCEVENDOR sy-vline 
WA_ISTLUNITHDRDET_STR-REFERENCEPAYER sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTDOCREFERENCEPARTY sy-vline 
WA_ISTLUNITHDRDET_STR-COUNTERPARTYFULLNAME sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTDOCUMENTTYPE sy-vline 
WA_ISTLUNITHDRDET_STR-APPLICATIONDOCTYPEDESCRIPTION sy-vline 
WA_ISTLUNITHDRDET_STR-ACMREFERENCESETTLEMENTCATEGORY sy-vline 
WA_ISTLUNITHDRDET_STR-DOCUMENTCATEGORYTEXT sy-vline 
WA_ISTLUNITHDRDET_STR-CUSTOMERCOUNTRYKEY sy-vline 
WA_ISTLUNITHDRDET_STR-COMPANYCOUNTRYNAME sy-vline 
WA_ISTLUNITHDRDET_STR-REGION sy-vline 
WA_ISTLUNITHDRDET_STR-REGIONNAME sy-vline 
WA_ISTLUNITHDRDET_STR-ABDNUMBER sy-vline 
WA_ISTLUNITHDRDET_STR-SIDE sy-vline 
WA_ISTLUNITHDRDET_STR-DOCUMENTSIDE sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLEMENTSCENARIO sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLEMENTSCENARIONAME sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLEMENTPOSTINGDATE sy-vline 
WA_ISTLUNITHDRDET_STR-SETTLEMENTCURRENCY sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTUNITNETAMOUNT sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTNETORDERAMOUNT sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTUNITGROSSAMOUNT sy-vline 
WA_ISTLUNITHDRDET_STR-THRESHOLDPERCENTAGE sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTDPQSINDICATORTEXT sy-vline 
WA_ISTLUNITHDRDET_STR-DPQSINSETTLEMENTINDICATOR sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLEMENTUNITISIGNOREDPQS sy-vline 
WA_ISTLUNITHDRDET_STR-ACMSETTLMTISFNLSEPARATEINVCFEE sy-vline 
WA_ISTLUNITHDRDET_STR-CONTRACTAPPLICATIONUUID sy-vline 
WA_ISTLUNITHDRDET_STR-CONTRACTAPPLICATIONVERSION sy-vline 
WA_ISTLUNITHDRDET_STR-APPLITEMCREATEDONDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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