ABAP Select data from SAP table LXDCKM_LXDCN_SCHDL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXDCKM_LXDCN_SCHDL
*  INTO TABLE @DATA(IT_LXDCKM_LXDCN_SCHDL2).
*--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_LXDCKM_LXDCN_SCHDL INDEX 1 INTO DATA(WA_LXDCKM_LXDCN_SCHDL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXDCKM_LXDCN_SCHDL>-LGNUM = 1.
<LXDCKM_LXDCN_SCHDL>-DCNUM = 1.
<LXDCKM_LXDCN_SCHDL>-DCTYP = 1.
<LXDCKM_LXDCN_SCHDL>-OBNUMINB = 1.
<LXDCKM_LXDCN_SCHDL>-OBTYPINB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXDCKM_LXDCN_SCHDL-OBPOSINB, sy-vline,
  WA_LXDCKM_LXDCN_SCHDL-OBNUMOUT, sy-vline,
  WA_LXDCKM_LXDCN_SCHDL-OBTYPOUT, sy-vline,
  WA_LXDCKM_LXDCN_SCHDL-OBPOSOUT, sy-vline,
  WA_LXDCKM_LXDCN_SCHDL-DCSTS, sy-vline,
  WA_LXDCKM_LXDCN_SCHDL-DCQTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXDCKM_LXDCN_SCHDL 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_LXDCKM_LXDCN_SCHDL 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_LXDCKM_LXDCN_SCHDL INTO WA_LXDCKM_LXDCN_SCHDL.


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

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

*Conversion exit CUNIT, internal->external for field DCUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LXDCKM_LXDCN_SCHDL-DCUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_LXDCN_SCHDL-DCUOM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LXDCKM_LXDCN_SCHDL-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_LXDCN_SCHDL-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TSHME, internal->external for field CRETS
CALL FUNCTION 'CONVERSION_EXIT_TSHME_OUTPUT'
  EXPORTING
    input =                      WA_LXDCKM_LXDCN_SCHDL-CRETS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_LXDCN_SCHDL-CRETS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSHME, internal->external for field UPDTS
CALL FUNCTION 'CONVERSION_EXIT_TSHME_OUTPUT'
  EXPORTING
    input =                      WA_LXDCKM_LXDCN_SCHDL-UPDTS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_LXDCN_SCHDL-UPDTS.
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_LXDCKM_LXDCN_SCHDL_STR, 
LGNUM TYPE STRING,
DCNUM TYPE STRING,
DCTYP TYPE STRING,
OBNUMINB TYPE STRING,
OBTYPINB TYPE STRING,
OBPOSINB TYPE STRING,
OBNUMOUT TYPE STRING,
OBTYPOUT TYPE STRING,
OBPOSOUT TYPE STRING,
DCSTS TYPE STRING,
DCQTY TYPE STRING,
IPQTY TYPE STRING,
ICQTY TYPE STRING,
OPQTY TYPE STRING,
DCUOM TYPE STRING,
DCORG TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,
CREUN TYPE STRING,
CRETS TYPE STRING,
UPDUN TYPE STRING,
UPDTS TYPE STRING,
SCHDL TYPE STRING,
SCMSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXDCKM_LXDCN_SCHDL_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_LXDCKM_LXDCN_SCHDL_STR-LGNUM sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-DCNUM sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-DCTYP sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OBNUMINB sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OBTYPINB sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OBPOSINB sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OBNUMOUT sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OBTYPOUT sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OBPOSOUT sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-DCSTS sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-DCQTY sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-IPQTY sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-ICQTY sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-OPQTY sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-DCUOM sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-DCORG sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-MATNR sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-WERKS sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-LGORT sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-SOBKZ sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-SONUM sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-CHARG sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-BESTQ sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-CREUN sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-CRETS sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-UPDUN sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-UPDTS sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-SCHDL sy-vline 
WA_LXDCKM_LXDCN_SCHDL_STR-SCMSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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