ABAP Select data from SAP table OIJ_EL_DFLOW_SUB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIJ_EL_DFLOW_SUB
*  INTO TABLE @DATA(IT_OIJ_EL_DFLOW_SUB2).
*--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_OIJ_EL_DFLOW_SUB INDEX 1 INTO DATA(WA_OIJ_EL_DFLOW_SUB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIJ_EL_DFLOW_SUB>-MANDT = 1.
<OIJ_EL_DFLOW_SUB>-DOCNO = 1.
<OIJ_EL_DFLOW_SUB>-NOMTK = 1.
<OIJ_EL_DFLOW_SUB>-NOMIT = 1.
<OIJ_EL_DFLOW_SUB>-SUBITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIJ_EL_DFLOW_SUB-RETURNCODE, sy-vline,
  WA_OIJ_EL_DFLOW_SUB-DOCNR, sy-vline,
  WA_OIJ_EL_DFLOW_SUB-MJAHR, sy-vline,
  WA_OIJ_EL_DFLOW_SUB-POSNR, sy-vline,
  WA_OIJ_EL_DFLOW_SUB-VBTYP, sy-vline,
  WA_OIJ_EL_DFLOW_SUB-REVDOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIJ_EL_DFLOW_SUB 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_OIJ_EL_DFLOW_SUB 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_OIJ_EL_DFLOW_SUB INTO WA_OIJ_EL_DFLOW_SUB.


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

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

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

*Conversion exit GJAHR, internal->external for field MJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_OIJ_EL_DFLOW_SUB-MJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ_EL_DFLOW_SUB-MJAHR.
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_OIJ_EL_DFLOW_SUB_STR, 
MANDT TYPE STRING,
DOCNO TYPE STRING,
NOMTK TYPE STRING,
NOMIT TYPE STRING,
SUBITEM TYPE STRING,
RETURNCODE TYPE STRING,
DOCNR TYPE STRING,
MJAHR TYPE STRING,
POSNR TYPE STRING,
VBTYP TYPE STRING,
REVDOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIJ_EL_DFLOW_SUB_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_OIJ_EL_DFLOW_SUB_STR-MANDT sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-DOCNO sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-NOMTK sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-NOMIT sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-SUBITEM sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-RETURNCODE sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-DOCNR sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-MJAHR sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-POSNR sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-VBTYP sy-vline 
WA_OIJ_EL_DFLOW_SUB_STR-REVDOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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