ABAP Select data from SAP table OICDC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OICDC
*  INTO TABLE @DATA(IT_OICDC2).
*--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_OICDC INDEX 1 INTO DATA(WA_OICDC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OICDC>-MANDT = 1.
<OICDC>-OIDRC = 1.
<OICDC>-OIC_DRCTRY = 1.
<OICDC>-OIC_DRCREG = 1.
<OICDC>-OIMETIND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OICDC-OIWAP, sy-vline,
  WA_OICDC-OISLF, sy-vline,
  WA_OICDC-OIPSDRC, sy-vline,
  WA_OICDC-ERDAT, sy-vline,
  WA_OICDC-ERTIM, sy-vline,
  WA_OICDC-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OICDC 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_OICDC 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_OICDC INTO WA_OICDC.


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

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

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

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

*Conversion exit NUMCV, internal->external for field OIPSDRC
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_OICDC-OIPSDRC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OICDC-OIPSDRC.
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_OICDC_STR, 
MANDT TYPE STRING,
OIDRC TYPE STRING,
OIC_DRCTRY TYPE STRING,
OIC_DRCREG TYPE STRING,
OIMETIND TYPE STRING,
OIWAP TYPE STRING,
OISLF TYPE STRING,
OIPSDRC TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERNAM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OICDC_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_OICDC_STR-MANDT sy-vline 
WA_OICDC_STR-OIDRC sy-vline 
WA_OICDC_STR-OIC_DRCTRY sy-vline 
WA_OICDC_STR-OIC_DRCREG sy-vline 
WA_OICDC_STR-OIMETIND sy-vline 
WA_OICDC_STR-OIWAP sy-vline 
WA_OICDC_STR-OISLF sy-vline 
WA_OICDC_STR-OIPSDRC sy-vline 
WA_OICDC_STR-ERDAT sy-vline 
WA_OICDC_STR-ERTIM sy-vline 
WA_OICDC_STR-ERNAM sy-vline 
WA_OICDC_STR-AEDAT sy-vline 
WA_OICDC_STR-AETIM sy-vline 
WA_OICDC_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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