ABAP Select data from SAP table UEKPO_WEIGHTS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM UEKPO_WEIGHTS
*  INTO TABLE @DATA(IT_UEKPO_WEIGHTS2).
*--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_UEKPO_WEIGHTS INDEX 1 INTO DATA(WA_UEKPO_WEIGHTS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<UEKPO_WEIGHTS>-MANDT = 1.
<UEKPO_WEIGHTS>-PURCHASINGDOCUMENT = 1.
<UEKPO_WEIGHTS>-PURCHASINGDOCUMENTITEM = 1.
<UEKPO_WEIGHTS>-COMMODITYQUANTITYSEQNUMBER = 1.
<UEKPO_WEIGHTS>-COMMODITYCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_UEKPO_WEIGHTS-VALIDITYENDDATE, sy-vline,
  WA_UEKPO_WEIGHTS-VALIDITYFROMDATE, sy-vline,
  WA_UEKPO_WEIGHTS-PURCHASINGDOCUMENTCATEGORY, sy-vline,
  WA_UEKPO_WEIGHTS-COMMODITYQUANTITY, sy-vline,
  WA_UEKPO_WEIGHTS-COMMODITYQUANTITYUNIT, sy-vline,
  WA_UEKPO_WEIGHTS-PERITEMQUANTITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_UEKPO_WEIGHTS 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_UEKPO_WEIGHTS 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_UEKPO_WEIGHTS INTO WA_UEKPO_WEIGHTS.


*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 ALPHA, internal->external for field PURCHASINGDOCUMENT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_UEKPO_WEIGHTS-PURCHASINGDOCUMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UEKPO_WEIGHTS-PURCHASINGDOCUMENT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field PERITEMUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_UEKPO_WEIGHTS-PERITEMUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_UEKPO_WEIGHTS-PERITEMUNIT.
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_UEKPO_WEIGHTS_STR, 
MANDT TYPE STRING,
PURCHASINGDOCUMENT TYPE STRING,
PURCHASINGDOCUMENTITEM TYPE STRING,
COMMODITYQUANTITYSEQNUMBER TYPE STRING,
COMMODITYCODE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
VALIDITYFROMDATE TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
COMMODITYQUANTITY TYPE STRING,
COMMODITYQUANTITYUNIT TYPE STRING,
PERITEMQUANTITY TYPE STRING,
PERITEMUNIT TYPE STRING,
PURGDOCCMMDTYUPDATECYCLE TYPE STRING,
COMMODITY TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_UEKPO_WEIGHTS_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_UEKPO_WEIGHTS_STR-MANDT sy-vline 
WA_UEKPO_WEIGHTS_STR-PURCHASINGDOCUMENT sy-vline 
WA_UEKPO_WEIGHTS_STR-PURCHASINGDOCUMENTITEM sy-vline 
WA_UEKPO_WEIGHTS_STR-COMMODITYQUANTITYSEQNUMBER sy-vline 
WA_UEKPO_WEIGHTS_STR-COMMODITYCODE sy-vline 
WA_UEKPO_WEIGHTS_STR-VALIDITYENDDATE sy-vline 
WA_UEKPO_WEIGHTS_STR-VALIDITYFROMDATE sy-vline 
WA_UEKPO_WEIGHTS_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_UEKPO_WEIGHTS_STR-COMMODITYQUANTITY sy-vline 
WA_UEKPO_WEIGHTS_STR-COMMODITYQUANTITYUNIT sy-vline 
WA_UEKPO_WEIGHTS_STR-PERITEMQUANTITY sy-vline 
WA_UEKPO_WEIGHTS_STR-PERITEMUNIT sy-vline 
WA_UEKPO_WEIGHTS_STR-PURGDOCCMMDTYUPDATECYCLE sy-vline 
WA_UEKPO_WEIGHTS_STR-COMMODITY sy-vline 
WA_UEKPO_WEIGHTS_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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