ABAP Select data from SAP table V_MRP_PROD_DEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_MRP_PROD_DEM
*  INTO TABLE @DATA(IT_V_MRP_PROD_DEM2).
*--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_V_MRP_PROD_DEM INDEX 1 INTO DATA(WA_V_MRP_PROD_DEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_MRP_PROD_DEM>-MANDT = 1.
<V_MRP_PROD_DEM>-MRPPLANNINGSEGMENTTYPE = 1.
<V_MRP_PROD_DEM>-MRPPLANNINGSEGMENTNUMBER = 1.
<V_MRP_PROD_DEM>-MRPPLANNINGSEGMENTID = 1.
<V_MRP_PROD_DEM>-MRPPLANNINGSEGMENTITEM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_MRP_PROD_DEM-MATERIAL, sy-vline,
  WA_V_MRP_PROD_DEM-MRPAREA, sy-vline,
  WA_V_MRP_PROD_DEM-MRPAREATEXT, sy-vline,
  WA_V_MRP_PROD_DEM-MRPPLANT, sy-vline,
  WA_V_MRP_PROD_DEM-MRPPLANTNAME, sy-vline,
  WA_V_MRP_PROD_DEM-MRPCONTROLLER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_MRP_PROD_DEM 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_V_MRP_PROD_DEM 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_V_MRP_PROD_DEM INTO WA_V_MRP_PROD_DEM.


*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 MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PROD_DEM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PROD_DEM-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MATERIALBASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V_MRP_PROD_DEM-MATERIALBASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_MRP_PROD_DEM-MATERIALBASEUNIT.
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_V_MRP_PROD_DEM_STR, 
MANDT TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPPLANNINGSEGMENTNUMBER TYPE STRING,
MRPPLANNINGSEGMENTID TYPE STRING,
MRPPLANNINGSEGMENTITEM TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
MRPAREATEXT TYPE STRING,
MRPPLANT TYPE STRING,
MRPPLANTNAME TYPE STRING,
MRPCONTROLLER TYPE STRING,
MRPCONTROLLERNAME TYPE STRING,
MATERIALSAFETYSTOCKQTY TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
QUANTITYPRECISION TYPE STRING,
TARGETQUANTITYUNITDISPLAYDCMLS TYPE STRING,
MATERIALPROCUREMENTCATEGORY TYPE STRING,
MATERIALREPLNMTLEADDURNENDDATE TYPE STRING,
TOTALREPLNMTLEADDURNENDDATE TYPE STRING,
MANUALPLANNINGHORIZONENDDATE TYPE STRING,
MRPSAFETYDURATIONENDDATE TYPE STRING,
MRPELEMENTCATEGORY TYPE STRING,
MRPELEMENT TYPE STRING,
MRPELEMENTITEM TYPE STRING,
MRPELEMENTSCHEDULELINE TYPE STRING,
MATERIALSHORTAGEPROFILE TYPE STRING,
MATERIALSHORTAGEPROF_CNT TYPE STRING,
MRPELEMENTAVAILYORRQMTDATE TYPE STRING,
MRPELEMENTOPENQUANTITY TYPE STRING,
SOURCEMRPELEMENTCATEGORY TYPE STRING,
SOURCEMRPELEMENT TYPE STRING,
SOURCEMRPELEMENTITEM TYPE STRING,
MRPELEMENTTYPEIMPORTANCE TYPE STRING,
MRPELEMENTUNCOVEREDQUANTITY TYPE STRING,
MRPELEMENTDELAYEDQUANTITY TYPE STRING,
MAXIMUMDELAY TYPE STRING,
MAXIMUMDELAYINDAYS TYPE STRING,
MAXIMUMDELAYINWORKDAYS TYPE STRING,
PROCUREMENTPROGRESSINDICATOR TYPE STRING,
STORAGELOCATION TYPE STRING,
PRODUCTIONPLANT TYPE STRING,
DEMANDTYPE TYPE STRING,
ORDERTYPE TYPE STRING,
ORDERQUANTITY TYPE STRING,
PRODUCEDMATERIAL TYPE STRING,
PRODUCTIONSUPERVISOR TYPE STRING,
PRODUCTIONSUPERVISORNAME TYPE STRING,
PRODUCTIONVERSION TYPE STRING,
PRODUCTIONVERSIONTEXT TYPE STRING,
PRODUCTIONLINE TYPE STRING,
PRODUCTIONLINEINTERNALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_MRP_PROD_DEM_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_V_MRP_PROD_DEM_STR-MANDT sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPPLANNINGSEGMENTNUMBER sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPPLANNINGSEGMENTID sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPPLANNINGSEGMENTITEM sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIAL sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPAREA sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPAREATEXT sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPPLANT sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPPLANTNAME sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPCONTROLLER sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPCONTROLLERNAME sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIALSAFETYSTOCKQTY sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIALBASEUNIT sy-vline 
WA_V_MRP_PROD_DEM_STR-QUANTITYPRECISION sy-vline 
WA_V_MRP_PROD_DEM_STR-TARGETQUANTITYUNITDISPLAYDCMLS sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIALPROCUREMENTCATEGORY sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIALREPLNMTLEADDURNENDDATE sy-vline 
WA_V_MRP_PROD_DEM_STR-TOTALREPLNMTLEADDURNENDDATE sy-vline 
WA_V_MRP_PROD_DEM_STR-MANUALPLANNINGHORIZONENDDATE sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPSAFETYDURATIONENDDATE sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTCATEGORY sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENT sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTITEM sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTSCHEDULELINE sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIALSHORTAGEPROFILE sy-vline 
WA_V_MRP_PROD_DEM_STR-MATERIALSHORTAGEPROF_CNT sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTAVAILYORRQMTDATE sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTOPENQUANTITY sy-vline 
WA_V_MRP_PROD_DEM_STR-SOURCEMRPELEMENTCATEGORY sy-vline 
WA_V_MRP_PROD_DEM_STR-SOURCEMRPELEMENT sy-vline 
WA_V_MRP_PROD_DEM_STR-SOURCEMRPELEMENTITEM sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTTYPEIMPORTANCE sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTUNCOVEREDQUANTITY sy-vline 
WA_V_MRP_PROD_DEM_STR-MRPELEMENTDELAYEDQUANTITY sy-vline 
WA_V_MRP_PROD_DEM_STR-MAXIMUMDELAY sy-vline 
WA_V_MRP_PROD_DEM_STR-MAXIMUMDELAYINDAYS sy-vline 
WA_V_MRP_PROD_DEM_STR-MAXIMUMDELAYINWORKDAYS sy-vline 
WA_V_MRP_PROD_DEM_STR-PROCUREMENTPROGRESSINDICATOR sy-vline 
WA_V_MRP_PROD_DEM_STR-STORAGELOCATION sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONPLANT sy-vline 
WA_V_MRP_PROD_DEM_STR-DEMANDTYPE sy-vline 
WA_V_MRP_PROD_DEM_STR-ORDERTYPE sy-vline 
WA_V_MRP_PROD_DEM_STR-ORDERQUANTITY sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCEDMATERIAL sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONSUPERVISOR sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONSUPERVISORNAME sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONVERSION sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONVERSIONTEXT sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONLINE sy-vline 
WA_V_MRP_PROD_DEM_STR-PRODUCTIONLINEINTERNALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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