ABAP Select data from SAP table ICARDECSL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICARDECSL
*  INTO TABLE @DATA(IT_ICARDECSL2).
*--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_ICARDECSL INDEX 1 INTO DATA(WA_ICARDECSL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICARDECSL>-MANDT = 1.
<ICARDECSL>-COMPANYCODE = 1.
<ICARDECSL>-CARPTGDATETYPEFORECSALESLIST = 1.
<ICARDECSL>-ECSALESLISTREPORTINGDATE = 1.
<ICARDECSL>-BUSINESSPARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICARDECSL-CADOCUMENTNUMBER, sy-vline,
  WA_ICARDECSL-CASQNCNUMBERFORECSALESLIST, sy-vline,
  WA_ICARDECSL-TAXCODE, sy-vline,
  WA_ICARDECSL-TAXTYPE, sy-vline,
  WA_ICARDECSL-EUTAXCLASSIFICATION, sy-vline,
  WA_ICARDECSL-COUNTRYCURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICARDECSL 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_ICARDECSL 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_ICARDECSL INTO WA_ICARDECSL.


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

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

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

*Conversion exit ALPHA, internal->external for field CAREVERSEDDOCUMENTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICARDECSL-CAREVERSEDDOCUMENTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICARDECSL-CAREVERSEDDOCUMENTNUMBER.
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_ICARDECSL_STR, 
MANDT TYPE STRING,
COMPANYCODE TYPE STRING,
CARPTGDATETYPEFORECSALESLIST TYPE STRING,
ECSALESLISTREPORTINGDATE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CASQNCNUMBERFORECSALESLIST TYPE STRING,
TAXCODE TYPE STRING,
TAXTYPE TYPE STRING,
EUTAXCLASSIFICATION TYPE STRING,
COUNTRYCURRENCY TYPE STRING,
COMPANYCODECURRENCY TYPE STRING,
CATAXBASEAMTINCOUNTRYCRCY TYPE STRING,
CATAXBASEAMTINCOCODECRCY TYPE STRING,
TAXRETURNCOUNTRY TYPE STRING,
CAREFERENCEDOCUMENT TYPE STRING,
CAPOSTINGDATE TYPE STRING,
DOCUMENTDATE TYPE STRING,
CANETDUEDATE TYPE STRING,
TAXREPORTINGDATE TYPE STRING,
CAREVERSEDDOCUMENTNUMBER TYPE STRING,
VATREGISTRATION TYPE STRING,
COUNTRY TYPE STRING,
BUSINESSPARTNERNAME TYPE STRING,
CABUSINESSPARTNERREFTYPE TYPE STRING,
CABUSINESSPARTNERREFFORTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICARDECSL_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_ICARDECSL_STR-MANDT sy-vline 
WA_ICARDECSL_STR-COMPANYCODE sy-vline 
WA_ICARDECSL_STR-CARPTGDATETYPEFORECSALESLIST sy-vline 
WA_ICARDECSL_STR-ECSALESLISTREPORTINGDATE sy-vline 
WA_ICARDECSL_STR-BUSINESSPARTNER sy-vline 
WA_ICARDECSL_STR-CADOCUMENTNUMBER sy-vline 
WA_ICARDECSL_STR-CASQNCNUMBERFORECSALESLIST sy-vline 
WA_ICARDECSL_STR-TAXCODE sy-vline 
WA_ICARDECSL_STR-TAXTYPE sy-vline 
WA_ICARDECSL_STR-EUTAXCLASSIFICATION sy-vline 
WA_ICARDECSL_STR-COUNTRYCURRENCY sy-vline 
WA_ICARDECSL_STR-COMPANYCODECURRENCY sy-vline 
WA_ICARDECSL_STR-CATAXBASEAMTINCOUNTRYCRCY sy-vline 
WA_ICARDECSL_STR-CATAXBASEAMTINCOCODECRCY sy-vline 
WA_ICARDECSL_STR-TAXRETURNCOUNTRY sy-vline 
WA_ICARDECSL_STR-CAREFERENCEDOCUMENT sy-vline 
WA_ICARDECSL_STR-CAPOSTINGDATE sy-vline 
WA_ICARDECSL_STR-DOCUMENTDATE sy-vline 
WA_ICARDECSL_STR-CANETDUEDATE sy-vline 
WA_ICARDECSL_STR-TAXREPORTINGDATE sy-vline 
WA_ICARDECSL_STR-CAREVERSEDDOCUMENTNUMBER sy-vline 
WA_ICARDECSL_STR-VATREGISTRATION sy-vline 
WA_ICARDECSL_STR-COUNTRY sy-vline 
WA_ICARDECSL_STR-BUSINESSPARTNERNAME sy-vline 
WA_ICARDECSL_STR-CABUSINESSPARTNERREFTYPE sy-vline 
WA_ICARDECSL_STR-CABUSINESSPARTNERREFFORTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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