ABAP Select data from SAP table ISTOCKREQITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISTOCKREQITEM
*  INTO TABLE @DATA(IT_ISTOCKREQITEM2).
*--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_ISTOCKREQITEM INDEX 1 INTO DATA(WA_ISTOCKREQITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISTOCKREQITEM>-ROWINDEX = 1.
<ISTOCKREQITEM>-MRPPLANT = 1.
<ISTOCKREQITEM>-MATERIAL = 1.
<ISTOCKREQITEM>-MRPAREA = 1.
<ISTOCKREQITEM>-MATERIALSHORTAGEDEFINITION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISTOCKREQITEM-MRPPLANNINGSEGMENTTYPE, sy-vline,
  WA_ISTOCKREQITEM-MRPPLANNINGSEGMENT, sy-vline,
  WA_ISTOCKREQITEM-MRPELEMENT, sy-vline,
  WA_ISTOCKREQITEM-MRPELEMENTITEM, sy-vline,
  WA_ISTOCKREQITEM-MRPELEMENTSCHEDULELINE, sy-vline,
  WA_ISTOCKREQITEM-MRPELEMENTCATEGORY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISTOCKREQITEM 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_ISTOCKREQITEM 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_ISTOCKREQITEM INTO WA_ISTOCKREQITEM.


*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_ISTOCKREQITEM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTOCKREQITEM-MATERIAL.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit MATN1, internal->external for field MATERIALEXTERNALID
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_ISTOCKREQITEM-MATERIALEXTERNALID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISTOCKREQITEM-MATERIALEXTERNALID.
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_ISTOCKREQITEM_STR, 
ROWINDEX TYPE STRING,
MRPPLANT TYPE STRING,
MATERIAL TYPE STRING,
MRPAREA TYPE STRING,
MATERIALSHORTAGEDEFINITION TYPE STRING,
MRPPLANNINGSEGMENTTYPE TYPE STRING,
MRPPLANNINGSEGMENT TYPE STRING,
MRPELEMENT TYPE STRING,
MRPELEMENTITEM TYPE STRING,
MRPELEMENTSCHEDULELINE TYPE STRING,
MRPELEMENTCATEGORY TYPE STRING,
MRPELEMENTCATEGORYSHORTNAME TYPE STRING,
MATERIALBASEUNIT TYPE STRING,
UNITOFMEASURETECHNICALNAME TYPE STRING,
UNITOFMEASURE_E TYPE STRING,
MRPELEMENTAVAILYORRQMTDATE TYPE STRING,
MRPAVAILABLEQUANTITY TYPE STRING,
MRPELEMENTOPENQUANTITY TYPE STRING,
MATERIALSHORTAGECRITICALQTY TYPE STRING,
MATERIALSHORTAGEQUANTITYTHLD TYPE STRING,
MATERIALSAFETYSTOCKQTY TYPE STRING,
MRPELEMENTQUANTITYISFIRM TYPE STRING,
MRPELEMENTDOCUMENTTYPE TYPE STRING,
MFGORDERSTATUSINTERNALCODE TYPE STRING,
STORAGELOCATION TYPE STRING,
ASSEMBLY TYPE STRING,
PRODUCTIONVERSION TYPE STRING,
REQUIREMENTPLAN TYPE STRING,
SOURCEMRPELEMENT TYPE STRING,
SOURCEMRPELEMENTITEM TYPE STRING,
SOURCEMRPELEMENTSCHEDULELINE TYPE STRING,
SOURCEMRPELEMENTCATEGORY TYPE STRING,
MRPELEMENTBUSINESSPARTNER TYPE STRING,
MRPELEMENTBUSINESSPARTNERNAME TYPE STRING,
MRPELEMENTBUSINESSPARTNERTYPE TYPE STRING,
QUANTITYUNITDCMLS TYPE STRING,
MATERIALSHORTAGESTATUS TYPE STRING,
MRPELEMENTISRELEASED TYPE STRING,
MRPELEMENTISPARTIALLYDELIVERED TYPE STRING,
SOLUTIONREQUESTSTATUS TYPE STRING,
MRPREQUESTSUPPLIERRESPONSE TYPE STRING,
MRPAVAILABILITY TYPE STRING,
HORIZONFORSELECTIONINDAYS TYPE STRING,
HASDECISIONSUPPORT TYPE STRING,
NUMBEROFSHORTAGES TYPE STRING,
MRPELEMENTDOCUMENTTYPENAME TYPE STRING,
AGGREGATIONSUPPLYPROFILE TYPE STRING,
AGGREGATIONDEMANDPROFILE TYPE STRING,
MRPELEMENTCATEGORYGROUPNAME TYPE STRING,
HASSUPPLIEDINTHEPAST TYPE STRING,
ISNONAGGREGATED TYPE STRING,
TARGETQUANTITYUNITDCMLS TYPE STRING,
MATERIALEXTERNALID TYPE STRING,
CREATIONDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISTOCKREQITEM_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_ISTOCKREQITEM_STR-ROWINDEX sy-vline 
WA_ISTOCKREQITEM_STR-MRPPLANT sy-vline 
WA_ISTOCKREQITEM_STR-MATERIAL sy-vline 
WA_ISTOCKREQITEM_STR-MRPAREA sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALSHORTAGEDEFINITION sy-vline 
WA_ISTOCKREQITEM_STR-MRPPLANNINGSEGMENTTYPE sy-vline 
WA_ISTOCKREQITEM_STR-MRPPLANNINGSEGMENT sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENT sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTITEM sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTSCHEDULELINE sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTCATEGORY sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTCATEGORYSHORTNAME sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALBASEUNIT sy-vline 
WA_ISTOCKREQITEM_STR-UNITOFMEASURETECHNICALNAME sy-vline 
WA_ISTOCKREQITEM_STR-UNITOFMEASURE_E sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTAVAILYORRQMTDATE sy-vline 
WA_ISTOCKREQITEM_STR-MRPAVAILABLEQUANTITY sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTOPENQUANTITY sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALSHORTAGECRITICALQTY sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALSHORTAGEQUANTITYTHLD sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALSAFETYSTOCKQTY sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTQUANTITYISFIRM sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTDOCUMENTTYPE sy-vline 
WA_ISTOCKREQITEM_STR-MFGORDERSTATUSINTERNALCODE sy-vline 
WA_ISTOCKREQITEM_STR-STORAGELOCATION sy-vline 
WA_ISTOCKREQITEM_STR-ASSEMBLY sy-vline 
WA_ISTOCKREQITEM_STR-PRODUCTIONVERSION sy-vline 
WA_ISTOCKREQITEM_STR-REQUIREMENTPLAN sy-vline 
WA_ISTOCKREQITEM_STR-SOURCEMRPELEMENT sy-vline 
WA_ISTOCKREQITEM_STR-SOURCEMRPELEMENTITEM sy-vline 
WA_ISTOCKREQITEM_STR-SOURCEMRPELEMENTSCHEDULELINE sy-vline 
WA_ISTOCKREQITEM_STR-SOURCEMRPELEMENTCATEGORY sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTBUSINESSPARTNER sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTBUSINESSPARTNERNAME sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTBUSINESSPARTNERTYPE sy-vline 
WA_ISTOCKREQITEM_STR-QUANTITYUNITDCMLS sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALSHORTAGESTATUS sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTISRELEASED sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTISPARTIALLYDELIVERED sy-vline 
WA_ISTOCKREQITEM_STR-SOLUTIONREQUESTSTATUS sy-vline 
WA_ISTOCKREQITEM_STR-MRPREQUESTSUPPLIERRESPONSE sy-vline 
WA_ISTOCKREQITEM_STR-MRPAVAILABILITY sy-vline 
WA_ISTOCKREQITEM_STR-HORIZONFORSELECTIONINDAYS sy-vline 
WA_ISTOCKREQITEM_STR-HASDECISIONSUPPORT sy-vline 
WA_ISTOCKREQITEM_STR-NUMBEROFSHORTAGES sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTDOCUMENTTYPENAME sy-vline 
WA_ISTOCKREQITEM_STR-AGGREGATIONSUPPLYPROFILE sy-vline 
WA_ISTOCKREQITEM_STR-AGGREGATIONDEMANDPROFILE sy-vline 
WA_ISTOCKREQITEM_STR-MRPELEMENTCATEGORYGROUPNAME sy-vline 
WA_ISTOCKREQITEM_STR-HASSUPPLIEDINTHEPAST sy-vline 
WA_ISTOCKREQITEM_STR-ISNONAGGREGATED sy-vline 
WA_ISTOCKREQITEM_STR-TARGETQUANTITYUNITDCMLS sy-vline 
WA_ISTOCKREQITEM_STR-MATERIALEXTERNALID sy-vline 
WA_ISTOCKREQITEM_STR-CREATIONDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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