ABAP Select data from SAP table KBLPSD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KBLPSD
*  INTO TABLE @DATA(IT_KBLPSD2).
*--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_KBLPSD INDEX 1 INTO DATA(WA_KBLPSD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KBLPSD>-MANDT = 1.
<KBLPSD>-BELNR = 1.
<KBLPSD>-BLPOS = 1.
<KBLPSD>-BPENT = 1.
<KBLPSD>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KBLPSD-BLTYP, sy-vline,
  WA_KBLPSD-XPLUS, sy-vline,
  WA_KBLPSD-XMINUS, sy-vline,
  WA_KBLPSD-PMBLDAT, sy-vline,
  WA_KBLPSD-BTEXT, sy-vline,
  WA_KBLPSD-WTSUPP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KBLPSD 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_KBLPSD 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_KBLPSD INTO WA_KBLPSD.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KBLPSD-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBLPSD-BELNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field GJAHR_RAP
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KBLPSD-GJAHR_RAP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBLPSD-GJAHR_RAP.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field BELNR_PI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KBLPSD-BELNR_PI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KBLPSD-BELNR_PI.
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_KBLPSD_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
BLPOS TYPE STRING,
BPENT TYPE STRING,
BLART TYPE STRING,
BLTYP TYPE STRING,
XPLUS TYPE STRING,
XMINUS TYPE STRING,
PMBLDAT TYPE STRING,
BTEXT TYPE STRING,
WTSUPP TYPE STRING,
HWSUPP TYPE STRING,
APPSTATUS TYPE STRING,
SUPPAPP TYPE STRING,
PMREASON TYPE STRING,
PMLOCK TYPE STRING,
WAERS TYPE STRING,
HWAER TYPE STRING,
SUPPTYPE TYPE STRING,
APPROVALSTATE TYPE STRING,
EF_GROUP_NUMBER TYPE STRING,
GVANR TYPE STRING,
RAP TYPE STRING,
BUKRS_RAP TYPE STRING,
GJAHR_RAP TYPE STRING,
BELNR_RGR TYPE STRING,
BELNR_PI TYPE STRING,
REPO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KBLPSD_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_KBLPSD_STR-MANDT sy-vline 
WA_KBLPSD_STR-BELNR sy-vline 
WA_KBLPSD_STR-BLPOS sy-vline 
WA_KBLPSD_STR-BPENT sy-vline 
WA_KBLPSD_STR-BLART sy-vline 
WA_KBLPSD_STR-BLTYP sy-vline 
WA_KBLPSD_STR-XPLUS sy-vline 
WA_KBLPSD_STR-XMINUS sy-vline 
WA_KBLPSD_STR-PMBLDAT sy-vline 
WA_KBLPSD_STR-BTEXT sy-vline 
WA_KBLPSD_STR-WTSUPP sy-vline 
WA_KBLPSD_STR-HWSUPP sy-vline 
WA_KBLPSD_STR-APPSTATUS sy-vline 
WA_KBLPSD_STR-SUPPAPP sy-vline 
WA_KBLPSD_STR-PMREASON sy-vline 
WA_KBLPSD_STR-PMLOCK sy-vline 
WA_KBLPSD_STR-WAERS sy-vline 
WA_KBLPSD_STR-HWAER sy-vline 
WA_KBLPSD_STR-SUPPTYPE sy-vline 
WA_KBLPSD_STR-APPROVALSTATE sy-vline 
WA_KBLPSD_STR-EF_GROUP_NUMBER sy-vline 
WA_KBLPSD_STR-GVANR sy-vline 
WA_KBLPSD_STR-RAP sy-vline 
WA_KBLPSD_STR-BUKRS_RAP sy-vline 
WA_KBLPSD_STR-GJAHR_RAP sy-vline 
WA_KBLPSD_STR-BELNR_RGR sy-vline 
WA_KBLPSD_STR-BELNR_PI sy-vline 
WA_KBLPSD_STR-REPO sy-vline      INTO ld_text SEPARATED BY SPACE.

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