ABAP Select data from SAP table IODOCL into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IODOCL 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 IODOCL. 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 IODOCL 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_IODOCL TYPE STANDARD TABLE OF IODOCL,
      WA_IODOCL TYPE IODOCL,
      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: <IODOCL> TYPE IODOCL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IODOCL
*  INTO TABLE @DATA(IT_IODOCL2).
*--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_IODOCL INDEX 1 INTO DATA(WA_IODOCL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IODOCL>-MANDT = 1.
<IODOCL>-AUFNR = 1.
<IODOCL>-TYP = 1.
<IODOCL>-APOSNR = 1.
<IODOCL>-AUFPL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IODOCL-APLZL, sy-vline,
  WA_IODOCL-ZAEHL, sy-vline,
  WA_IODOCL-FOLNR, sy-vline,
  WA_IODOCL-VORNR, sy-vline,
  WA_IODOCL-UVORN, sy-vline,
  WA_IODOCL-DOKAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IODOCL 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_IODOCL 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_IODOCL INTO WA_IODOCL.


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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_IODOCL-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODOCL-VORNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field UVORN
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_IODOCL-UVORN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODOCL-UVORN.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IODOCL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODOCL-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field STLNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_IODOCL-STLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODOCL-STLNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IODOCL-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODOCL-MEINS.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field FSH_CPROD_ORD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IODOCL-FSH_CPROD_ORD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IODOCL-FSH_CPROD_ORD.
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_IODOCL_STR, 
MANDT TYPE STRING,
AUFNR TYPE STRING,
TYP TYPE STRING,
APOSNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
ZAEHL TYPE STRING,
FOLNR TYPE STRING,
VORNR TYPE STRING,
UVORN TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
OBJKY TYPE STRING,
LINKSRC TYPE STRING,
MATNR TYPE STRING,
VERID TYPE STRING,
STLTY TYPE STRING,
STLNR TYPE STRING,
STLKN TYPE STRING,
STPOZ TYPE STRING,
AENNR TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
POSTP TYPE STRING,
POSNR TYPE STRING,
SORTF TYPE STRING,
MEINS TYPE STRING,
MENGE TYPE STRING,
VBKZ TYPE STRING,
BTIDX TYPE STRING,
DELFLAG TYPE STRING,
DAEDAT TYPE STRING,
DAENAM TYPE STRING,
DAEZEIT TYPE STRING,
DKTXT TYPE STRING,
ICON_ORIGIN TYPE STRING,
INDEX_NODE TYPE STRING,
FSH_MPROD_ORD TYPE STRING,
FSH_CPROD_ORD TYPE STRING,
FSH_MG_AT1 TYPE STRING,
FSH_MG_AT2 TYPE STRING,
FSH_MG_AT3 TYPE STRING,
WRF_CHARSTC1 TYPE STRING,
WRF_CHARSTC2 TYPE STRING,
WRF_CHARSTC3 TYPE STRING,
CHARSTC1_TXT TYPE STRING,
CHARSTC2_TXT TYPE STRING,
CHARSTC3_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IODOCL_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_IODOCL_STR-MANDT sy-vline 
WA_IODOCL_STR-AUFNR sy-vline 
WA_IODOCL_STR-TYP sy-vline 
WA_IODOCL_STR-APOSNR sy-vline 
WA_IODOCL_STR-AUFPL sy-vline 
WA_IODOCL_STR-APLZL sy-vline 
WA_IODOCL_STR-ZAEHL sy-vline 
WA_IODOCL_STR-FOLNR sy-vline 
WA_IODOCL_STR-VORNR sy-vline 
WA_IODOCL_STR-UVORN sy-vline 
WA_IODOCL_STR-DOKAR sy-vline 
WA_IODOCL_STR-DOKNR sy-vline 
WA_IODOCL_STR-DOKVR sy-vline 
WA_IODOCL_STR-DOKTL sy-vline 
WA_IODOCL_STR-OBJKY sy-vline 
WA_IODOCL_STR-LINKSRC sy-vline 
WA_IODOCL_STR-MATNR sy-vline 
WA_IODOCL_STR-VERID sy-vline 
WA_IODOCL_STR-STLTY sy-vline 
WA_IODOCL_STR-STLNR sy-vline 
WA_IODOCL_STR-STLKN sy-vline 
WA_IODOCL_STR-STPOZ sy-vline 
WA_IODOCL_STR-AENNR sy-vline 
WA_IODOCL_STR-AEDAT sy-vline 
WA_IODOCL_STR-AENAM sy-vline 
WA_IODOCL_STR-POSTP sy-vline 
WA_IODOCL_STR-POSNR sy-vline 
WA_IODOCL_STR-SORTF sy-vline 
WA_IODOCL_STR-MEINS sy-vline 
WA_IODOCL_STR-MENGE sy-vline 
WA_IODOCL_STR-VBKZ sy-vline 
WA_IODOCL_STR-BTIDX sy-vline 
WA_IODOCL_STR-DELFLAG sy-vline 
WA_IODOCL_STR-DAEDAT sy-vline 
WA_IODOCL_STR-DAENAM sy-vline 
WA_IODOCL_STR-DAEZEIT sy-vline 
WA_IODOCL_STR-DKTXT sy-vline 
WA_IODOCL_STR-ICON_ORIGIN sy-vline 
WA_IODOCL_STR-INDEX_NODE sy-vline 
WA_IODOCL_STR-FSH_MPROD_ORD sy-vline 
WA_IODOCL_STR-FSH_CPROD_ORD sy-vline 
WA_IODOCL_STR-FSH_MG_AT1 sy-vline 
WA_IODOCL_STR-FSH_MG_AT2 sy-vline 
WA_IODOCL_STR-FSH_MG_AT3 sy-vline 
WA_IODOCL_STR-WRF_CHARSTC1 sy-vline 
WA_IODOCL_STR-WRF_CHARSTC2 sy-vline 
WA_IODOCL_STR-WRF_CHARSTC3 sy-vline 
WA_IODOCL_STR-CHARSTC1_TXT sy-vline 
WA_IODOCL_STR-CHARSTC2_TXT sy-vline 
WA_IODOCL_STR-CHARSTC3_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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