ABAP Select data from SAP table KLSICHDHDR into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KLSICHDHDR
*  INTO TABLE @DATA(IT_KLSICHDHDR2).
*--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_KLSICHDHDR INDEX 1 INTO DATA(WA_KLSICHDHDR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KLSICHDHDR>-SID = 1.
<KLSICHDHDR>-DGUEL = 1.
<KLSICHDHDR>-CHNR = 1.
<KLSICHDHDR>-SIDEXT = 1.
<KLSICHDHDR>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KLSICHDHDR-PARTNR, sy-vline,
  WA_KLSICHDHDR-SLPG, sy-vline,
  WA_KLSICHDHDR-OBJNR, sy-vline,
  WA_KLSICHDHDR-NID, sy-vline,
  WA_KLSICHDHDR-BTHA, sy-vline,
  WA_KLSICHDHDR-BMTA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KLSICHDHDR 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_KLSICHDHDR 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_KLSICHDHDR INTO WA_KLSICHDHDR.


*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_KLSICHDHDR-CHNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KLSICHDHDR-CHNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field RANL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KLSICHDHDR-RANL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KLSICHDHDR-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_KLSICHDHDR_STR, 
SID TYPE STRING,
DGUEL TYPE STRING,
CHNR TYPE STRING,
SIDEXT TYPE STRING,
BUKRS TYPE STRING,
PARTNR TYPE STRING,
SLPG TYPE STRING,
OBJNR TYPE STRING,
NID TYPE STRING,
BTHA TYPE STRING,
BMTA TYPE STRING,
SCA TYPE STRING,
BAZ TYPE STRING,
SAZ TYPE STRING,
BSIWHR TYPE STRING,
SSIWHR TYPE STRING,
BESANT TYPE STRING,
RANL TYPE STRING,
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_KLSICHDHDR_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_KLSICHDHDR_STR-SID sy-vline 
WA_KLSICHDHDR_STR-DGUEL sy-vline 
WA_KLSICHDHDR_STR-CHNR sy-vline 
WA_KLSICHDHDR_STR-SIDEXT sy-vline 
WA_KLSICHDHDR_STR-BUKRS sy-vline 
WA_KLSICHDHDR_STR-PARTNR sy-vline 
WA_KLSICHDHDR_STR-SLPG sy-vline 
WA_KLSICHDHDR_STR-OBJNR sy-vline 
WA_KLSICHDHDR_STR-NID sy-vline 
WA_KLSICHDHDR_STR-BTHA sy-vline 
WA_KLSICHDHDR_STR-BMTA sy-vline 
WA_KLSICHDHDR_STR-SCA sy-vline 
WA_KLSICHDHDR_STR-BAZ sy-vline 
WA_KLSICHDHDR_STR-SAZ sy-vline 
WA_KLSICHDHDR_STR-BSIWHR sy-vline 
WA_KLSICHDHDR_STR-SSIWHR sy-vline 
WA_KLSICHDHDR_STR-BESANT sy-vline 
WA_KLSICHDHDR_STR-RANL sy-vline 
WA_KLSICHDHDR_STR-ASTUECK sy-vline 
WA_KLSICHDHDR_STR-UPUSERK sy-vline 
WA_KLSICHDHDR_STR-DUPDATK sy-vline 
WA_KLSICHDHDR_STR-TUPTIMK sy-vline 
WA_KLSICHDHDR_STR-CRUSERK sy-vline 
WA_KLSICHDHDR_STR-DCRDATK sy-vline 
WA_KLSICHDHDR_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.