ABAP Select data from SAP table EKLPCINV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EKLPCINV
*  INTO TABLE @DATA(IT_EKLPCINV2).
*--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_EKLPCINV INDEX 1 INTO DATA(WA_EKLPCINV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EKLPCINV>-MANDT = 1.
<EKLPCINV>-GPART = 1.
<EKLPCINV>-VKONT = 1.
<EKLPCINV>-IBLNR = 1.
<EKLPCINV>-CSCNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EKLPCINV-LDATE, sy-vline,
  WA_EKLPCINV-LTIME, sy-vline,
  WA_EKLPCINV-CHKEY, sy-vline,
  WA_EKLPCINV-CHAMT, sy-vline,
  WA_EKLPCINV-CHBSA, sy-vline,
  WA_EKLPCINV-CHDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EKLPCINV 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_EKLPCINV 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_EKLPCINV INTO WA_EKLPCINV.


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

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

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

*Conversion exit ALPHA, internal->external for field CHCRD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EKLPCINV-CHCRD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EKLPCINV-CHCRD.
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_EKLPCINV_STR, 
MANDT TYPE STRING,
GPART TYPE STRING,
VKONT TYPE STRING,
IBLNR TYPE STRING,
CSCNO TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
CHKEY TYPE STRING,
CHAMT TYPE STRING,
CHBSA TYPE STRING,
CHDAT TYPE STRING,
WAERS TYPE STRING,
CHCRD TYPE STRING,
STATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EKLPCINV_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_EKLPCINV_STR-MANDT sy-vline 
WA_EKLPCINV_STR-GPART sy-vline 
WA_EKLPCINV_STR-VKONT sy-vline 
WA_EKLPCINV_STR-IBLNR sy-vline 
WA_EKLPCINV_STR-CSCNO sy-vline 
WA_EKLPCINV_STR-LDATE sy-vline 
WA_EKLPCINV_STR-LTIME sy-vline 
WA_EKLPCINV_STR-CHKEY sy-vline 
WA_EKLPCINV_STR-CHAMT sy-vline 
WA_EKLPCINV_STR-CHBSA sy-vline 
WA_EKLPCINV_STR-CHDAT sy-vline 
WA_EKLPCINV_STR-WAERS sy-vline 
WA_EKLPCINV_STR-CHCRD sy-vline 
WA_EKLPCINV_STR-STATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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