ABAP Select data from SAP table LXDCKM_PLAN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LXDCKM_PLAN 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_PLAN. 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_PLAN 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_PLAN TYPE STANDARD TABLE OF LXDCKM_PLAN,
      WA_LXDCKM_PLAN TYPE LXDCKM_PLAN,
      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_PLAN> TYPE LXDCKM_PLAN.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXDCKM_PLAN
*  INTO TABLE @DATA(IT_LXDCKM_PLAN2).
*--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_PLAN INDEX 1 INTO DATA(WA_LXDCKM_PLAN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXDCKM_PLAN>-DCNUM = 1.
<LXDCKM_PLAN>-DCTYP = 1.
<LXDCKM_PLAN>-DCSTS = 1.
<LXDCKM_PLAN>-TKNUM_INB = 1.
<LXDCKM_PLAN>-OBNUMINB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXDCKM_PLAN-OBPOSINB, sy-vline,
  WA_LXDCKM_PLAN-OBTYPINB, sy-vline,
  WA_LXDCKM_PLAN-VENDR, sy-vline,
  WA_LXDCKM_PLAN-TKNUM_OUT, sy-vline,
  WA_LXDCKM_PLAN-OBNUMOUT, sy-vline,
  WA_LXDCKM_PLAN-OBPOSOUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXDCKM_PLAN 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_PLAN 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_PLAN INTO WA_LXDCKM_PLAN.


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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field DCUOM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_LXDCKM_PLAN-DCUOM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_PLAN-DCUOM.
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_PLAN_STR, 
DCNUM TYPE STRING,
DCTYP TYPE STRING,
DCSTS TYPE STRING,
TKNUM_INB TYPE STRING,
OBNUMINB TYPE STRING,
OBPOSINB TYPE STRING,
OBTYPINB TYPE STRING,
VENDR TYPE STRING,
TKNUM_OUT TYPE STRING,
OBNUMOUT TYPE STRING,
OBPOSOUT TYPE STRING,
OBTYPOUT TYPE STRING,
SOLDP TYPE STRING,
MATNR TYPE STRING,
DCQTY TYPE STRING,
DCUOM TYPE STRING,
FUNIT TYPE STRING,
SCHDL TYPE STRING,
SCMSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXDCKM_PLAN_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_PLAN_STR-DCNUM sy-vline 
WA_LXDCKM_PLAN_STR-DCTYP sy-vline 
WA_LXDCKM_PLAN_STR-DCSTS sy-vline 
WA_LXDCKM_PLAN_STR-TKNUM_INB sy-vline 
WA_LXDCKM_PLAN_STR-OBNUMINB sy-vline 
WA_LXDCKM_PLAN_STR-OBPOSINB sy-vline 
WA_LXDCKM_PLAN_STR-OBTYPINB sy-vline 
WA_LXDCKM_PLAN_STR-VENDR sy-vline 
WA_LXDCKM_PLAN_STR-TKNUM_OUT sy-vline 
WA_LXDCKM_PLAN_STR-OBNUMOUT sy-vline 
WA_LXDCKM_PLAN_STR-OBPOSOUT sy-vline 
WA_LXDCKM_PLAN_STR-OBTYPOUT sy-vline 
WA_LXDCKM_PLAN_STR-SOLDP sy-vline 
WA_LXDCKM_PLAN_STR-MATNR sy-vline 
WA_LXDCKM_PLAN_STR-DCQTY sy-vline 
WA_LXDCKM_PLAN_STR-DCUOM sy-vline 
WA_LXDCKM_PLAN_STR-FUNIT sy-vline 
WA_LXDCKM_PLAN_STR-SCHDL sy-vline 
WA_LXDCKM_PLAN_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.