ABAP Select data from SAP table KLLIMITPROD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KLLIMITPROD
*  INTO TABLE @DATA(IT_KLLIMITPROD2).
*--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_KLLIMITPROD INDEX 1 INTO DATA(WA_KLLIMITPROD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KLLIMITPROD>-OBJNR = 1.
<KLLIMITPROD>-SLA = 1.
<KLLIMITPROD>-LIMITVEXCEEDED = 1.
<KLLIMITPROD>-SGSART = 1.
<KLLIMITPROD>-SFHAART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KLLIMITPROD-BNOMI1, sy-vline,
  WA_KLLIMITPROD-SNOMWHR1, sy-vline,
  WA_KLLIMITPROD-BNOMI2, sy-vline,
  WA_KLLIMITPROD-SNOMWHR2, sy-vline,
  WA_KLLIMITPROD-ANRECHBETR, sy-vline,
  WA_KLLIMITPROD-WHRANR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KLLIMITPROD 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_KLLIMITPROD 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_KLLIMITPROD INTO WA_KLLIMITPROD.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_KLLIMITPROD_STR, 
OBJNR TYPE STRING,
SLA TYPE STRING,
LIMITVEXCEEDED TYPE STRING,
SGSART TYPE STRING,
SFHAART TYPE STRING,
BNOMI1 TYPE STRING,
SNOMWHR1 TYPE STRING,
BNOMI2 TYPE STRING,
SNOMWHR2 TYPE STRING,
ANRECHBETR TYPE STRING,
WHRANR TYPE STRING,
PROD_LIMIT TYPE STRING,
PROD_WLIMIT TYPE STRING,
DIFF_AMOUNT TYPE STRING,
DIFF_WAMOUNT TYPE STRING,
LIMIT TYPE STRING,
WLIMIT TYPE STRING,
CR_USER TYPE STRING,
CR_DATE TYPE STRING,
CR_TIM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KLLIMITPROD_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_KLLIMITPROD_STR-OBJNR sy-vline 
WA_KLLIMITPROD_STR-SLA sy-vline 
WA_KLLIMITPROD_STR-LIMITVEXCEEDED sy-vline 
WA_KLLIMITPROD_STR-SGSART sy-vline 
WA_KLLIMITPROD_STR-SFHAART sy-vline 
WA_KLLIMITPROD_STR-BNOMI1 sy-vline 
WA_KLLIMITPROD_STR-SNOMWHR1 sy-vline 
WA_KLLIMITPROD_STR-BNOMI2 sy-vline 
WA_KLLIMITPROD_STR-SNOMWHR2 sy-vline 
WA_KLLIMITPROD_STR-ANRECHBETR sy-vline 
WA_KLLIMITPROD_STR-WHRANR sy-vline 
WA_KLLIMITPROD_STR-PROD_LIMIT sy-vline 
WA_KLLIMITPROD_STR-PROD_WLIMIT sy-vline 
WA_KLLIMITPROD_STR-DIFF_AMOUNT sy-vline 
WA_KLLIMITPROD_STR-DIFF_WAMOUNT sy-vline 
WA_KLLIMITPROD_STR-LIMIT sy-vline 
WA_KLLIMITPROD_STR-WLIMIT sy-vline 
WA_KLLIMITPROD_STR-CR_USER sy-vline 
WA_KLLIMITPROD_STR-CR_DATE sy-vline 
WA_KLLIMITPROD_STR-CR_TIM sy-vline      INTO ld_text SEPARATED BY SPACE.

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