ABAP Select data from SAP table OIJ09_S_CURRENT_DEMAND into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP OIJ09_S_CURRENT_DEMAND 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 OIJ09_S_CURRENT_DEMAND. 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 OIJ09_S_CURRENT_DEMAND 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_OIJ09_S_CURRENT_DEMAND TYPE STANDARD TABLE OF OIJ09_S_CURRENT_DEMAND,
      WA_OIJ09_S_CURRENT_DEMAND TYPE OIJ09_S_CURRENT_DEMAND,
      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: <OIJ09_S_CURRENT_DEMAND> TYPE OIJ09_S_CURRENT_DEMAND.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_OIJ09_S_CURRENT_DEMAND.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM OIJ09_S_CURRENT_DEMAND
  INTO TABLE IT_OIJ09_S_CURRENT_DEMAND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIJ09_S_CURRENT_DEMAND
*  INTO TABLE @DATA(IT_OIJ09_S_CURRENT_DEMAND2).
*--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_OIJ09_S_CURRENT_DEMAND INDEX 1 INTO DATA(WA_OIJ09_S_CURRENT_DEMAND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_OIJ09_S_CURRENT_DEMAND ASSIGNING <OIJ09_S_CURRENT_DEMAND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIJ09_S_CURRENT_DEMAND>-LOC_ID = 1.
<OIJ09_S_CURRENT_DEMAND>-LOCNAME = 1.
<OIJ09_S_CURRENT_DEMAND>-MATNR = 1.
<OIJ09_S_CURRENT_DEMAND>-MAKTX = 1.
<OIJ09_S_CURRENT_DEMAND>-MENGE = 1.

ENDLOOP.

LOOP AT IT_OIJ09_S_CURRENT_DEMAND INTO WA_OIJ09_S_CURRENT_DEMAND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIJ09_S_CURRENT_DEMAND-UOM, sy-vline,
  WA_OIJ09_S_CURRENT_DEMAND-SCHED_DT, sy-vline,
  WA_OIJ09_S_CURRENT_DEMAND-NOMTK, sy-vline,
  WA_OIJ09_S_CURRENT_DEMAND-NOMIT, sy-vline,
  WA_OIJ09_S_CURRENT_DEMAND-NOMNR, sy-vline,
  WA_OIJ09_S_CURRENT_DEMAND-SIMNOM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIJ09_S_CURRENT_DEMAND 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_OIJ09_S_CURRENT_DEMAND 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_OIJ09_S_CURRENT_DEMAND INTO WA_OIJ09_S_CURRENT_DEMAND.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field UOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-UOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-UOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NOMTK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-NOMTK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-NOMTK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NMVEHICLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-NMVEHICLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-NMVEHICLE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-DOCNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SIM_SCHED_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-SIM_SCHED_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-SIM_SCHED_ID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NMSHIPPER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-NMSHIPPER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-NMSHIPPER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NMCARRIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIJ09_S_CURRENT_DEMAND-NMCARRIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIJ09_S_CURRENT_DEMAND-NMCARRIER.
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_OIJ09_S_CURRENT_DEMAND_STR, 
LOC_ID TYPE STRING,
LOCNAME TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
MENGE TYPE STRING,
UOM TYPE STRING,
SCHED_DT TYPE STRING,
NOMTK TYPE STRING,
NOMIT TYPE STRING,
NOMNR TYPE STRING,
SIMNOM TYPE STRING,
VKTRA TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
BEZEI TYPE STRING,
SITYP TYPE STRING,
NMVEHICLE TYPE STRING,
DOCNR TYPE STRING,
DOCITM TYPE STRING,
ROUTE TYPE STRING,
DOCIND TYPE STRING,
TSYST TYPE STRING,
SIM_SCHED_ID TYPE STRING,
NMSHIPPER TYPE STRING,
NMCARRIER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIJ09_S_CURRENT_DEMAND_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_OIJ09_S_CURRENT_DEMAND_STR-LOC_ID sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-LOCNAME sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-MATNR sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-MAKTX sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-MENGE sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-UOM sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-SCHED_DT sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-NOMTK sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-NOMIT sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-NOMNR sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-SIMNOM sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-VKTRA sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-ERNAM sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-ERDAT sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-BEZEI sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-SITYP sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-NMVEHICLE sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-DOCNR sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-DOCITM sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-ROUTE sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-DOCIND sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-TSYST sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-SIM_SCHED_ID sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-NMSHIPPER sy-vline 
WA_OIJ09_S_CURRENT_DEMAND_STR-NMCARRIER sy-vline      INTO ld_text SEPARATED BY SPACE.

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