ABAP Select data from SAP table PSUPASSGMTPREV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSUPASSGMTPREV
*  INTO TABLE @DATA(IT_PSUPASSGMTPREV2).
*--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_PSUPASSGMTPREV INDEX 1 INTO DATA(WA_PSUPASSGMTPREV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSUPASSGMTPREV>-MANDT = 1.
<PSUPASSGMTPREV>-ARUNID = 1.
<PSUPASSGMTPREV>-PLANT = 1.
<PSUPASSGMTPREV>-MATERIAL = 1.
<PSUPASSGMTPREV>-REQUIREMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSUPASSGMTPREV-SUPPLYASSIGNMENTSTATUS, sy-vline,
  WA_PSUPASSGMTPREV-REQUIREMENTDOCUMENTNUMBER, sy-vline,
  WA_PSUPASSGMTPREV-REQUIREMENTDOCUMENTITEM, sy-vline,
  WA_PSUPASSGMTPREV-ASSIGNEDDEMANDTYPENAME, sy-vline,
  WA_PSUPASSGMTPREV-ASSIGNEDSUPPLYTYPE, sy-vline,
  WA_PSUPASSGMTPREV-SUPPLYNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSUPASSGMTPREV 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_PSUPASSGMTPREV 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_PSUPASSGMTPREV INTO WA_PSUPASSGMTPREV.


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

*Conversion exit CUNIT, internal->external for field BASEUNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSUPASSGMTPREV-BASEUNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSUPASSGMTPREV-BASEUNITOFMEASURE.
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_PSUPASSGMTPREV_STR, 
MANDT TYPE STRING,
ARUNID TYPE STRING,
PLANT TYPE STRING,
MATERIAL TYPE STRING,
REQUIREMENTTYPE TYPE STRING,
SUPPLYASSIGNMENTSTATUS TYPE STRING,
REQUIREMENTDOCUMENTNUMBER TYPE STRING,
REQUIREMENTDOCUMENTITEM TYPE STRING,
ASSIGNEDDEMANDTYPENAME TYPE STRING,
ASSIGNEDSUPPLYTYPE TYPE STRING,
SUPPLYNUMBER TYPE STRING,
SUPPLYITEM TYPE STRING,
SUPPLYSCHEDULELINE TYPE STRING,
ASSIGNEDSUPPLYTYPENAME TYPE STRING,
BATCH TYPE STRING,
STORAGELOCATION TYPE STRING,
ASSIGNEDQUANTITYINBASEUNIT TYPE STRING,
PREVIEWFIXEDASSIGNEDQTYINBSUNT TYPE STRING,
PREVIEWRESERVEDASSGDQTYINBSUNT TYPE STRING,
PREVIEWONHOLDASSGDQTYINBSUNT TYPE STRING,
PREVIEWRDYFORRELEASEQTYINBSUNT TYPE STRING,
BASEUNITOFMEASURE TYPE STRING,
REQUESTEDDATE TYPE STRING,
PRODUCTAVAILABILITYDATE TYPE STRING,
SUPPLYDELIVERYDATE TYPE STRING,
NUMBEROFDAYS TYPE STRING,
SUPPLYASSIGNMENTRUNMODE TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEBYUSER TYPE STRING,
MRPMATERIALAVAILABILITYDATE TYPE STRING,
REQUIREMENTSEGMENT TYPE STRING,
STOCKSEGMENT TYPE STRING,
PRODALLOCATIONUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSUPASSGMTPREV_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_PSUPASSGMTPREV_STR-MANDT sy-vline 
WA_PSUPASSGMTPREV_STR-ARUNID sy-vline 
WA_PSUPASSGMTPREV_STR-PLANT sy-vline 
WA_PSUPASSGMTPREV_STR-MATERIAL sy-vline 
WA_PSUPASSGMTPREV_STR-REQUIREMENTTYPE sy-vline 
WA_PSUPASSGMTPREV_STR-SUPPLYASSIGNMENTSTATUS sy-vline 
WA_PSUPASSGMTPREV_STR-REQUIREMENTDOCUMENTNUMBER sy-vline 
WA_PSUPASSGMTPREV_STR-REQUIREMENTDOCUMENTITEM sy-vline 
WA_PSUPASSGMTPREV_STR-ASSIGNEDDEMANDTYPENAME sy-vline 
WA_PSUPASSGMTPREV_STR-ASSIGNEDSUPPLYTYPE sy-vline 
WA_PSUPASSGMTPREV_STR-SUPPLYNUMBER sy-vline 
WA_PSUPASSGMTPREV_STR-SUPPLYITEM sy-vline 
WA_PSUPASSGMTPREV_STR-SUPPLYSCHEDULELINE sy-vline 
WA_PSUPASSGMTPREV_STR-ASSIGNEDSUPPLYTYPENAME sy-vline 
WA_PSUPASSGMTPREV_STR-BATCH sy-vline 
WA_PSUPASSGMTPREV_STR-STORAGELOCATION sy-vline 
WA_PSUPASSGMTPREV_STR-ASSIGNEDQUANTITYINBASEUNIT sy-vline 
WA_PSUPASSGMTPREV_STR-PREVIEWFIXEDASSIGNEDQTYINBSUNT sy-vline 
WA_PSUPASSGMTPREV_STR-PREVIEWRESERVEDASSGDQTYINBSUNT sy-vline 
WA_PSUPASSGMTPREV_STR-PREVIEWONHOLDASSGDQTYINBSUNT sy-vline 
WA_PSUPASSGMTPREV_STR-PREVIEWRDYFORRELEASEQTYINBSUNT sy-vline 
WA_PSUPASSGMTPREV_STR-BASEUNITOFMEASURE sy-vline 
WA_PSUPASSGMTPREV_STR-REQUESTEDDATE sy-vline 
WA_PSUPASSGMTPREV_STR-PRODUCTAVAILABILITYDATE sy-vline 
WA_PSUPASSGMTPREV_STR-SUPPLYDELIVERYDATE sy-vline 
WA_PSUPASSGMTPREV_STR-NUMBEROFDAYS sy-vline 
WA_PSUPASSGMTPREV_STR-SUPPLYASSIGNMENTRUNMODE sy-vline 
WA_PSUPASSGMTPREV_STR-CREATIONDATETIME sy-vline 
WA_PSUPASSGMTPREV_STR-LASTCHANGEBYUSER sy-vline 
WA_PSUPASSGMTPREV_STR-MRPMATERIALAVAILABILITYDATE sy-vline 
WA_PSUPASSGMTPREV_STR-REQUIREMENTSEGMENT sy-vline 
WA_PSUPASSGMTPREV_STR-STOCKSEGMENT sy-vline 
WA_PSUPASSGMTPREV_STR-PRODALLOCATIONUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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