ABAP Select data from SAP table CSTLUNITHDRDET into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CSTLUNITHDRDET
*  INTO TABLE @DATA(IT_CSTLUNITHDRDET2).
*--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_CSTLUNITHDRDET INDEX 1 INTO DATA(WA_CSTLUNITHDRDET2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CSTLUNITHDRDET-ACMSETTLEMENTDOCREFERENCEPARTY, sy-vline,
  WA_CSTLUNITHDRDET-COUNTERPARTYFULLNAME, sy-vline,
  WA_CSTLUNITHDRDET-ACMSETTLEMENTDOCUMENTTYPE, sy-vline,
  WA_CSTLUNITHDRDET-APPLICATIONDOCTYPEDESCRIPTION, sy-vline,
  WA_CSTLUNITHDRDET-ACMREFERENCESETTLEMENTCATEGORY, sy-vline,
  WA_CSTLUNITHDRDET-DOCUMENTCATEGORYTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CSTLUNITHDRDET 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_CSTLUNITHDRDET 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_CSTLUNITHDRDET INTO WA_CSTLUNITHDRDET.


*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_CSTLUNITHDRDET-SETTLMTDOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CSTLUNITHDRDET-SETTLMTDOC.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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