ABAP Select data from SAP table PSTCKLVLMNGNUM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSTCKLVLMNGNUM
*  INTO TABLE @DATA(IT_PSTCKLVLMNGNUM2).
*--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_PSTCKLVLMNGNUM INDEX 1 INTO DATA(WA_PSTCKLVLMNGNUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSTCKLVLMNGNUM>-MANDT = 1.
<PSTCKLVLMNGNUM>-MRPAREA = 1.
<PSTCKLVLMNGNUM>-MATERIAL = 1.
<PSTCKLVLMNGNUM>-PLANT = 1.
<PSTCKLVLMNGNUM>-PROPOSALSTARTDATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSTCKLVLMNGNUM-PROPOSALVERSION, sy-vline,
  WA_PSTCKLVLMNGNUM-AVGDAILYUSAGEHORIZONENDDATE, sy-vline,
  WA_PSTCKLVLMNGNUM-AVGDAILYUSAGEHORIZONSTARTDATE, sy-vline,
  WA_PSTCKLVLMNGNUM-BUFLVLPROPOSALHORIZONSTARTDATE, sy-vline,
  WA_PSTCKLVLMNGNUM-AVGDAILYUSAGEDIFFERENCE, sy-vline,
  WA_PSTCKLVLMNGNUM-LEADTIMEDIFFERENCE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSTCKLVLMNGNUM 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_PSTCKLVLMNGNUM 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_PSTCKLVLMNGNUM INTO WA_PSTCKLVLMNGNUM.


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

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

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

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

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

*Conversion exit CUNIT, internal->external for field PROPOSEDMATLVARIABILITYUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSTCKLVLMNGNUM-PROPOSEDMATLVARIABILITYUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSTCKLVLMNGNUM-PROPOSEDMATLVARIABILITYUNIT.
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_PSTCKLVLMNGNUM_STR, 
MANDT TYPE STRING,
MRPAREA TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
PROPOSALSTARTDATE TYPE STRING,
PROPOSALVERSION TYPE STRING,
AVGDAILYUSAGEHORIZONENDDATE TYPE STRING,
AVGDAILYUSAGEHORIZONSTARTDATE TYPE STRING,
BUFLVLPROPOSALHORIZONSTARTDATE TYPE STRING,
AVGDAILYUSAGEDIFFERENCE TYPE STRING,
LEADTIMEDIFFERENCE TYPE STRING,
VARIABILITYFACTORDIFFERENCE TYPE STRING,
LEADTIMEFACTORDIFFERENCE TYPE STRING,
AVGDAILYUSAGEDEVIATIONRATE TYPE STRING,
VARIABILITYFACTORDEVIATIONRATE TYPE STRING,
LEADTIMEDEVIATIONRATE TYPE STRING,
LEADTIMEFACTORDEVIATIONRATE TYPE STRING,
CURRENTREDZONE TYPE STRING,
CURRENTYELLOWZONE TYPE STRING,
CURRENTGREENZONE TYPE STRING,
PROPOSEDREDZONE TYPE STRING,
PROPOSEDYELLOWZONE TYPE STRING,
PROPOSEDGREENZONE TYPE STRING,
REDZONEDIFFERENCE TYPE STRING,
YELLOWZONEDIFFERENCE TYPE STRING,
GREENZONEDIFFERENCE TYPE STRING,
MAXSTOCKDIFFERENCE TYPE STRING,
MAXSTOCKDEVIATIONRATE TYPE STRING,
CURRENTLEADTIME TYPE STRING,
BUFFERLEVELSTARTDATE TYPE STRING,
CURRENTAVERAGEDAILYUSAGE TYPE STRING,
CURRENTLEADTIMEFACTOR TYPE STRING,
CURRENTVARIABILITYFACTOR TYPE STRING,
PROPOSALENDDATE TYPE STRING,
PROPOSEDAVERAGEDAILYUSAGE TYPE STRING,
PROPOSEDLEADTIME TYPE STRING,
PROPOSEDLEADTIMEFACTOR TYPE STRING,
PROPOSEDVARIABILITYFACTOR TYPE STRING,
STOCKLEVELPROPOSALID TYPE STRING,
STOCKLEVELPROPOSALSTATUS TYPE STRING,
AVGDAILYUSAGEUNIT TYPE STRING,
PROPOSEDMATERIALBUFFERPROFILE TYPE STRING,
PROPOSEDMATLBUFFERPROFILETEXT TYPE STRING,
PROCUREMENTTYPEDESCRIPTION TYPE STRING,
VARIABILITYDESCRIPTION TYPE STRING,
REPLENISHMENTLEADTIMEDESC TYPE STRING,
DIFFERENCEINDAYSDESC TYPE STRING,
DIFFERENCEINDAYS TYPE STRING,
NORMALIZEDCURRENTREDZONE TYPE STRING,
NORMALIZEDCURRENTYELLOWZONE TYPE STRING,
NORMALIZEDCURRENTGREENZONE TYPE STRING,
NORMALIZEDPROPOSEDREDZONE TYPE STRING,
NORMALIZEDPROPOSEDYELLOWZONE TYPE STRING,
NORMALIZEDPROPOSEDGREENZONE TYPE STRING,
UNITOFMEASURE TYPE STRING,
ACTUALUNITOFMEASURE TYPE STRING,
HORIZONDAYSINPAST TYPE STRING,
MATLPRPSLADJMTFCTRISAPPLIED TYPE STRING,
VARIABILITYQUANTITY TYPE STRING,
VARIABILITYUNIT TYPE STRING,
REPLENISHMENTLEADTIMEVALUE TYPE STRING,
PROPOSEDMATLVARIABILITYCODE TYPE STRING,
PROPOSEDMATLVARIABILITYQTY TYPE STRING,
PROPOSEDMATLVARIABILITYUNIT TYPE STRING,
PROPOSEDMATLLEADTIMECODE TYPE STRING,
PROPOSEDMATLLEADTIME TYPE STRING,
CURRENTMATLLEADTIMECODE TYPE STRING,
CURRENTMATLVARIABILITYCODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSTCKLVLMNGNUM_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_PSTCKLVLMNGNUM_STR-MANDT sy-vline 
WA_PSTCKLVLMNGNUM_STR-MRPAREA sy-vline 
WA_PSTCKLVLMNGNUM_STR-MATERIAL sy-vline 
WA_PSTCKLVLMNGNUM_STR-PLANT sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSALSTARTDATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSALVERSION sy-vline 
WA_PSTCKLVLMNGNUM_STR-AVGDAILYUSAGEHORIZONENDDATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-AVGDAILYUSAGEHORIZONSTARTDATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-BUFLVLPROPOSALHORIZONSTARTDATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-AVGDAILYUSAGEDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-LEADTIMEDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-VARIABILITYFACTORDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-LEADTIMEFACTORDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-AVGDAILYUSAGEDEVIATIONRATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-VARIABILITYFACTORDEVIATIONRATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-LEADTIMEDEVIATIONRATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-LEADTIMEFACTORDEVIATIONRATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTREDZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTYELLOWZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTGREENZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDREDZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDYELLOWZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDGREENZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-REDZONEDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-YELLOWZONEDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-GREENZONEDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-MAXSTOCKDIFFERENCE sy-vline 
WA_PSTCKLVLMNGNUM_STR-MAXSTOCKDEVIATIONRATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTLEADTIME sy-vline 
WA_PSTCKLVLMNGNUM_STR-BUFFERLEVELSTARTDATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTAVERAGEDAILYUSAGE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTLEADTIMEFACTOR sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTVARIABILITYFACTOR sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSALENDDATE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDAVERAGEDAILYUSAGE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDLEADTIME sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDLEADTIMEFACTOR sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDVARIABILITYFACTOR sy-vline 
WA_PSTCKLVLMNGNUM_STR-STOCKLEVELPROPOSALID sy-vline 
WA_PSTCKLVLMNGNUM_STR-STOCKLEVELPROPOSALSTATUS sy-vline 
WA_PSTCKLVLMNGNUM_STR-AVGDAILYUSAGEUNIT sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATERIALBUFFERPROFILE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATLBUFFERPROFILETEXT sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROCUREMENTTYPEDESCRIPTION sy-vline 
WA_PSTCKLVLMNGNUM_STR-VARIABILITYDESCRIPTION sy-vline 
WA_PSTCKLVLMNGNUM_STR-REPLENISHMENTLEADTIMEDESC sy-vline 
WA_PSTCKLVLMNGNUM_STR-DIFFERENCEINDAYSDESC sy-vline 
WA_PSTCKLVLMNGNUM_STR-DIFFERENCEINDAYS sy-vline 
WA_PSTCKLVLMNGNUM_STR-NORMALIZEDCURRENTREDZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-NORMALIZEDCURRENTYELLOWZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-NORMALIZEDCURRENTGREENZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-NORMALIZEDPROPOSEDREDZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-NORMALIZEDPROPOSEDYELLOWZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-NORMALIZEDPROPOSEDGREENZONE sy-vline 
WA_PSTCKLVLMNGNUM_STR-UNITOFMEASURE sy-vline 
WA_PSTCKLVLMNGNUM_STR-ACTUALUNITOFMEASURE sy-vline 
WA_PSTCKLVLMNGNUM_STR-HORIZONDAYSINPAST sy-vline 
WA_PSTCKLVLMNGNUM_STR-MATLPRPSLADJMTFCTRISAPPLIED sy-vline 
WA_PSTCKLVLMNGNUM_STR-VARIABILITYQUANTITY sy-vline 
WA_PSTCKLVLMNGNUM_STR-VARIABILITYUNIT sy-vline 
WA_PSTCKLVLMNGNUM_STR-REPLENISHMENTLEADTIMEVALUE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATLVARIABILITYCODE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATLVARIABILITYQTY sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATLVARIABILITYUNIT sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATLLEADTIMECODE sy-vline 
WA_PSTCKLVLMNGNUM_STR-PROPOSEDMATLLEADTIME sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTMATLLEADTIMECODE sy-vline 
WA_PSTCKLVLMNGNUM_STR-CURRENTMATLVARIABILITYCODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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