ABAP Select data from SAP table ILCMDOCANA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ILCMDOCANA
*  INTO TABLE @DATA(IT_ILCMDOCANA2).
*--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_ILCMDOCANA INDEX 1 INTO DATA(WA_ILCMDOCANA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ILCMDOCANA>-MANDT = 1.
<ILCMDOCANA>-LGLCNTNTMDOCUMENTUUID = 1.
<ILCMDOCANA>-LGLCNTNTMDOCUMENT = 1.
<ILCMDOCANA>-DOCUMENTDESCRIPTION = 1.
<ILCMDOCANA>-LEGALTRANSACTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ILCMDOCANA-LEGALTRANSACTIONUUID, sy-vline,
  WA_ILCMDOCANA-LGLCNTNTMDOCCONTENTTYPE, sy-vline,
  WA_ILCMDOCANA-LGLCNTNTMDOCCONTENTTYPENAME, sy-vline,
  WA_ILCMDOCANA-LGLCNTNTMLANGUAGE, sy-vline,
  WA_ILCMDOCANA-LANGUAGENAME, sy-vline,
  WA_ILCMDOCANA-LGLCNTNTMDOCUMENTLINKEDOBJKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ILCMDOCANA 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_ILCMDOCANA 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_ILCMDOCANA INTO WA_ILCMDOCANA.


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

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

*Conversion exit ISOLA, internal->external for field LGLCNTNTMLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ILCMDOCANA-LGLCNTNTMLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ILCMDOCANA-LGLCNTNTMLANGUAGE.
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_ILCMDOCANA_STR, 
MANDT TYPE STRING,
LGLCNTNTMDOCUMENTUUID TYPE STRING,
LGLCNTNTMDOCUMENT TYPE STRING,
DOCUMENTDESCRIPTION TYPE STRING,
LEGALTRANSACTION TYPE STRING,
LEGALTRANSACTIONUUID TYPE STRING,
LGLCNTNTMDOCCONTENTTYPE TYPE STRING,
LGLCNTNTMDOCCONTENTTYPENAME TYPE STRING,
LGLCNTNTMLANGUAGE TYPE STRING,
LANGUAGENAME TYPE STRING,
LGLCNTNTMDOCUMENTLINKEDOBJKEY TYPE STRING,
LGLCNTNTMDOCUMENTLINKEDOBJECT TYPE STRING,
LGLCNTNTMCHANGEDBYUSER TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
LGLCNTNTMCHANGEDUTCDATETIME TYPE STRING,
LGLCNTNTMAGINGSTSCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ILCMDOCANA_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_ILCMDOCANA_STR-MANDT sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMDOCUMENTUUID sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMDOCUMENT sy-vline 
WA_ILCMDOCANA_STR-DOCUMENTDESCRIPTION sy-vline 
WA_ILCMDOCANA_STR-LEGALTRANSACTION sy-vline 
WA_ILCMDOCANA_STR-LEGALTRANSACTIONUUID sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMDOCCONTENTTYPE sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMDOCCONTENTTYPENAME sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMLANGUAGE sy-vline 
WA_ILCMDOCANA_STR-LANGUAGENAME sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMDOCUMENTLINKEDOBJKEY sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMDOCUMENTLINKEDOBJECT sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMCHANGEDBYUSER sy-vline 
WA_ILCMDOCANA_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMCHANGEDUTCDATETIME sy-vline 
WA_ILCMDOCANA_STR-LGLCNTNTMAGINGSTSCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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