ABAP Select data from SAP table LXDCK_TO_CREATE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXDCK_TO_CREATE
*  INTO TABLE @DATA(IT_LXDCK_TO_CREATE2).
*--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_LXDCK_TO_CREATE INDEX 1 INTO DATA(WA_LXDCK_TO_CREATE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXDCK_TO_CREATE>-LGNUM = 1.
<LXDCK_TO_CREATE>-DOCTY = 1.
<LXDCK_TO_CREATE>-DOCNR = 1.
<LXDCK_TO_CREATE>-DOCIT = 1.
<LXDCK_TO_CREATE>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXDCK_TO_CREATE-QTYTO, sy-vline,
  WA_LXDCK_TO_CREATE-UOMBS, sy-vline,
  WA_LXDCK_TO_CREATE-CHARG, sy-vline,
  WA_LXDCK_TO_CREATE-SOBKZ, sy-vline,
  WA_LXDCK_TO_CREATE-SONUM, sy-vline,
  WA_LXDCK_TO_CREATE-BESTQ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXDCK_TO_CREATE 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_LXDCK_TO_CREATE 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_LXDCK_TO_CREATE INTO WA_LXDCK_TO_CREATE.


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

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

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

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXDCK_TO_CREATE-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCK_TO_CREATE-SONUM.
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_LXDCK_TO_CREATE_STR, 
LGNUM TYPE STRING,
DOCTY TYPE STRING,
DOCNR TYPE STRING,
DOCIT TYPE STRING,
MATNR TYPE STRING,
QTYTO TYPE STRING,
UOMBS TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
BESTQ TYPE STRING,
WERKS TYPE STRING,
BWLVS TYPE STRING,
LGORT TYPE STRING,
WDATU TYPE STRING,
VFDAT TYPE STRING,
LAGKL TYPE STRING,
WGFKL TYPE STRING,
MINWM TYPE STRING,
LTKZE TYPE STRING,
LTKZA TYPE STRING,
MHDRZ TYPE STRING,
MHDKZ TYPE STRING,
CNSFF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXDCK_TO_CREATE_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_LXDCK_TO_CREATE_STR-LGNUM sy-vline 
WA_LXDCK_TO_CREATE_STR-DOCTY sy-vline 
WA_LXDCK_TO_CREATE_STR-DOCNR sy-vline 
WA_LXDCK_TO_CREATE_STR-DOCIT sy-vline 
WA_LXDCK_TO_CREATE_STR-MATNR sy-vline 
WA_LXDCK_TO_CREATE_STR-QTYTO sy-vline 
WA_LXDCK_TO_CREATE_STR-UOMBS sy-vline 
WA_LXDCK_TO_CREATE_STR-CHARG sy-vline 
WA_LXDCK_TO_CREATE_STR-SOBKZ sy-vline 
WA_LXDCK_TO_CREATE_STR-SONUM sy-vline 
WA_LXDCK_TO_CREATE_STR-BESTQ sy-vline 
WA_LXDCK_TO_CREATE_STR-WERKS sy-vline 
WA_LXDCK_TO_CREATE_STR-BWLVS sy-vline 
WA_LXDCK_TO_CREATE_STR-LGORT sy-vline 
WA_LXDCK_TO_CREATE_STR-WDATU sy-vline 
WA_LXDCK_TO_CREATE_STR-VFDAT sy-vline 
WA_LXDCK_TO_CREATE_STR-LAGKL sy-vline 
WA_LXDCK_TO_CREATE_STR-WGFKL sy-vline 
WA_LXDCK_TO_CREATE_STR-MINWM sy-vline 
WA_LXDCK_TO_CREATE_STR-LTKZE sy-vline 
WA_LXDCK_TO_CREATE_STR-LTKZA sy-vline 
WA_LXDCK_TO_CREATE_STR-MHDRZ sy-vline 
WA_LXDCK_TO_CREATE_STR-MHDKZ sy-vline 
WA_LXDCK_TO_CREATE_STR-CNSFF sy-vline      INTO ld_text SEPARATED BY SPACE.

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