ABAP Select data from SAP table KLSICHDPOS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KLSICHDPOS
*  INTO TABLE @DATA(IT_KLSICHDPOS2).
*--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_KLSICHDPOS INDEX 1 INTO DATA(WA_KLSICHDPOS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KLSICHDPOS>-SID = 1.
<KLSICHDPOS>-DGUEL = 1.
<KLSICHDPOS>-CHNR = 1.
<KLSICHDPOS>-N_BUKRS = 1.
<KLSICHDPOS>-O_BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KLSICHDPOS-N_PARTNR, sy-vline,
  WA_KLSICHDPOS-O_PARTNR, sy-vline,
  WA_KLSICHDPOS-N_SLPG, sy-vline,
  WA_KLSICHDPOS-O_SLPG, sy-vline,
  WA_KLSICHDPOS-N_OBJNR, sy-vline,
  WA_KLSICHDPOS-O_OBJNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KLSICHDPOS 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_KLSICHDPOS 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_KLSICHDPOS INTO WA_KLSICHDPOS.


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

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

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

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

*Conversion exit ALPHA, internal->external for field O_RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KLSICHDPOS-O_RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KLSICHDPOS-O_RANL.
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_KLSICHDPOS_STR, 
SID TYPE STRING,
DGUEL TYPE STRING,
CHNR TYPE STRING,
N_BUKRS TYPE STRING,
O_BUKRS TYPE STRING,
N_PARTNR TYPE STRING,
O_PARTNR TYPE STRING,
N_SLPG TYPE STRING,
O_SLPG TYPE STRING,
N_OBJNR TYPE STRING,
O_OBJNR TYPE STRING,
N_NID TYPE STRING,
O_NID TYPE STRING,
N_BTHA TYPE STRING,
O_BTHA TYPE STRING,
N_BMTA TYPE STRING,
O_BMTA TYPE STRING,
N_SCA TYPE STRING,
O_SCA TYPE STRING,
N_BAZ TYPE STRING,
O_BAZ TYPE STRING,
N_SAZ TYPE STRING,
O_SAZ TYPE STRING,
N_BSIWHR TYPE STRING,
O_BSIWHR TYPE STRING,
N_SSIWHR TYPE STRING,
O_SSIWHR TYPE STRING,
N_BESANT TYPE STRING,
O_BESANT TYPE STRING,
N_RANL TYPE STRING,
O_RANL TYPE STRING,
N_ASTUECK TYPE STRING,
O_ASTUECK TYPE STRING,
UPUSERK TYPE STRING,
DUPDATK TYPE STRING,
TUPTIMK TYPE STRING,
CRUSERK TYPE STRING,
DCRDATK TYPE STRING,
TCRTIMK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KLSICHDPOS_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_KLSICHDPOS_STR-SID sy-vline 
WA_KLSICHDPOS_STR-DGUEL sy-vline 
WA_KLSICHDPOS_STR-CHNR sy-vline 
WA_KLSICHDPOS_STR-N_BUKRS sy-vline 
WA_KLSICHDPOS_STR-O_BUKRS sy-vline 
WA_KLSICHDPOS_STR-N_PARTNR sy-vline 
WA_KLSICHDPOS_STR-O_PARTNR sy-vline 
WA_KLSICHDPOS_STR-N_SLPG sy-vline 
WA_KLSICHDPOS_STR-O_SLPG sy-vline 
WA_KLSICHDPOS_STR-N_OBJNR sy-vline 
WA_KLSICHDPOS_STR-O_OBJNR sy-vline 
WA_KLSICHDPOS_STR-N_NID sy-vline 
WA_KLSICHDPOS_STR-O_NID sy-vline 
WA_KLSICHDPOS_STR-N_BTHA sy-vline 
WA_KLSICHDPOS_STR-O_BTHA sy-vline 
WA_KLSICHDPOS_STR-N_BMTA sy-vline 
WA_KLSICHDPOS_STR-O_BMTA sy-vline 
WA_KLSICHDPOS_STR-N_SCA sy-vline 
WA_KLSICHDPOS_STR-O_SCA sy-vline 
WA_KLSICHDPOS_STR-N_BAZ sy-vline 
WA_KLSICHDPOS_STR-O_BAZ sy-vline 
WA_KLSICHDPOS_STR-N_SAZ sy-vline 
WA_KLSICHDPOS_STR-O_SAZ sy-vline 
WA_KLSICHDPOS_STR-N_BSIWHR sy-vline 
WA_KLSICHDPOS_STR-O_BSIWHR sy-vline 
WA_KLSICHDPOS_STR-N_SSIWHR sy-vline 
WA_KLSICHDPOS_STR-O_SSIWHR sy-vline 
WA_KLSICHDPOS_STR-N_BESANT sy-vline 
WA_KLSICHDPOS_STR-O_BESANT sy-vline 
WA_KLSICHDPOS_STR-N_RANL sy-vline 
WA_KLSICHDPOS_STR-O_RANL sy-vline 
WA_KLSICHDPOS_STR-N_ASTUECK sy-vline 
WA_KLSICHDPOS_STR-O_ASTUECK sy-vline 
WA_KLSICHDPOS_STR-UPUSERK sy-vline 
WA_KLSICHDPOS_STR-DUPDATK sy-vline 
WA_KLSICHDPOS_STR-TUPTIMK sy-vline 
WA_KLSICHDPOS_STR-CRUSERK sy-vline 
WA_KLSICHDPOS_STR-DCRDATK sy-vline 
WA_KLSICHDPOS_STR-TCRTIMK sy-vline      INTO ld_text SEPARATED BY SPACE.

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