ABAP Select data from SAP table PDDBUFLVLS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PDDBUFLVLS
*  INTO TABLE @DATA(IT_PDDBUFLVLS2).
*--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_PDDBUFLVLS INDEX 1 INTO DATA(WA_PDDBUFLVLS2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PDDBUFLVLS-MATERIALSAFETYSTOCKQTY, sy-vline,
  WA_PDDBUFLVLS-REORDERTHRESHOLDQUANTITY, sy-vline,
  WA_PDDBUFLVLS-BUFFERLEVELENDDATE, sy-vline,
  WA_PDDBUFLVLS-CURRENTREDZONE, sy-vline,
  WA_PDDBUFLVLS-STOCKLEVELPROPOSALID, sy-vline,
  WA_PDDBUFLVLS-PROPOSALSTARTDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PDDBUFLVLS 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_PDDBUFLVLS 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_PDDBUFLVLS INTO WA_PDDBUFLVLS.


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

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

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

*Conversion exit CUNIT, internal->external for field UNITOFMEASURE
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PDDBUFLVLS-UNITOFMEASURE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PDDBUFLVLS-UNITOFMEASURE.
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_PDDBUFLVLS_STR, 
MANDT TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
MRPAREA TYPE STRING,
BUFFERLEVELSTARTDATE TYPE STRING,
MATERIALSAFETYSTOCKQTY TYPE STRING,
REORDERTHRESHOLDQUANTITY TYPE STRING,
BUFFERLEVELENDDATE TYPE STRING,
CURRENTREDZONE TYPE STRING,
STOCKLEVELPROPOSALID TYPE STRING,
PROPOSALSTARTDATE TYPE STRING,
PROPOSALVERSION TYPE STRING,
CURRENTLEADTIME TYPE STRING,
CURRENTINDIVIDUALLEADTIME TYPE STRING,
CURRENTAVGDAILYUSAGE TYPE STRING,
CURRENTVARIABILITYFACTOR TYPE STRING,
CURRENTLEADTIMEFACTOR TYPE STRING,
MINIMUMORDERQUANTITY TYPE STRING,
BASEUNIT TYPE STRING,
MINORDQTYISCONSIDEREDGREENZONE TYPE STRING,
MATERIALMAXSTOCKLEVELQUANTITY TYPE STRING,
CURRENTYELLOWZONE TYPE STRING,
CURRENTGREENZONE TYPE STRING,
BOMUSAGECODE TYPE STRING,
LEADTIMECALCULATIONMETHOD TYPE STRING,
BOMUSAGEVALUE TYPE STRING,
CONSUMPTIONCODE TYPE STRING,
CONSUMPTIONVALUE TYPE STRING,
CURRENCY TYPE STRING,
VARIABILITYCODE TYPE STRING,
VARIABILITYQUANTITY TYPE STRING,
VARIABILITYUNIT TYPE STRING,
REPLENISHMENTLEADTIMECODE TYPE STRING,
REPLENISHMENTLEADTIMEVALUE TYPE STRING,
PROCUREMENTTYPE TYPE STRING,
BILLOFMATERIALUUID TYPE STRING,
SOURCEOFSUPPLY TYPE STRING,
UNITOFMEASURE TYPE STRING,
MATLPRPSLADJMTFCTRISAPPLIED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PDDBUFLVLS_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_PDDBUFLVLS_STR-MANDT sy-vline 
WA_PDDBUFLVLS_STR-MATERIAL sy-vline 
WA_PDDBUFLVLS_STR-PLANT sy-vline 
WA_PDDBUFLVLS_STR-MRPAREA sy-vline 
WA_PDDBUFLVLS_STR-BUFFERLEVELSTARTDATE sy-vline 
WA_PDDBUFLVLS_STR-MATERIALSAFETYSTOCKQTY sy-vline 
WA_PDDBUFLVLS_STR-REORDERTHRESHOLDQUANTITY sy-vline 
WA_PDDBUFLVLS_STR-BUFFERLEVELENDDATE sy-vline 
WA_PDDBUFLVLS_STR-CURRENTREDZONE sy-vline 
WA_PDDBUFLVLS_STR-STOCKLEVELPROPOSALID sy-vline 
WA_PDDBUFLVLS_STR-PROPOSALSTARTDATE sy-vline 
WA_PDDBUFLVLS_STR-PROPOSALVERSION sy-vline 
WA_PDDBUFLVLS_STR-CURRENTLEADTIME sy-vline 
WA_PDDBUFLVLS_STR-CURRENTINDIVIDUALLEADTIME sy-vline 
WA_PDDBUFLVLS_STR-CURRENTAVGDAILYUSAGE sy-vline 
WA_PDDBUFLVLS_STR-CURRENTVARIABILITYFACTOR sy-vline 
WA_PDDBUFLVLS_STR-CURRENTLEADTIMEFACTOR sy-vline 
WA_PDDBUFLVLS_STR-MINIMUMORDERQUANTITY sy-vline 
WA_PDDBUFLVLS_STR-BASEUNIT sy-vline 
WA_PDDBUFLVLS_STR-MINORDQTYISCONSIDEREDGREENZONE sy-vline 
WA_PDDBUFLVLS_STR-MATERIALMAXSTOCKLEVELQUANTITY sy-vline 
WA_PDDBUFLVLS_STR-CURRENTYELLOWZONE sy-vline 
WA_PDDBUFLVLS_STR-CURRENTGREENZONE sy-vline 
WA_PDDBUFLVLS_STR-BOMUSAGECODE sy-vline 
WA_PDDBUFLVLS_STR-LEADTIMECALCULATIONMETHOD sy-vline 
WA_PDDBUFLVLS_STR-BOMUSAGEVALUE sy-vline 
WA_PDDBUFLVLS_STR-CONSUMPTIONCODE sy-vline 
WA_PDDBUFLVLS_STR-CONSUMPTIONVALUE sy-vline 
WA_PDDBUFLVLS_STR-CURRENCY sy-vline 
WA_PDDBUFLVLS_STR-VARIABILITYCODE sy-vline 
WA_PDDBUFLVLS_STR-VARIABILITYQUANTITY sy-vline 
WA_PDDBUFLVLS_STR-VARIABILITYUNIT sy-vline 
WA_PDDBUFLVLS_STR-REPLENISHMENTLEADTIMECODE sy-vline 
WA_PDDBUFLVLS_STR-REPLENISHMENTLEADTIMEVALUE sy-vline 
WA_PDDBUFLVLS_STR-PROCUREMENTTYPE sy-vline 
WA_PDDBUFLVLS_STR-BILLOFMATERIALUUID sy-vline 
WA_PDDBUFLVLS_STR-SOURCEOFSUPPLY sy-vline 
WA_PDDBUFLVLS_STR-UNITOFMEASURE sy-vline 
WA_PDDBUFLVLS_STR-MATLPRPSLADJMTFCTRISAPPLIED sy-vline      INTO ld_text SEPARATED BY SPACE.

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