ABAP Select data from SAP table LXDCKM_LDOCV_ALERT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LXDCKM_LDOCV_ALERT 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_LDOCV_ALERT. 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_LDOCV_ALERT 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_LDOCV_ALERT TYPE STANDARD TABLE OF LXDCKM_LDOCV_ALERT,
      WA_LXDCKM_LDOCV_ALERT TYPE LXDCKM_LDOCV_ALERT,
      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_LDOCV_ALERT> TYPE LXDCKM_LDOCV_ALERT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXDCKM_LDOCV_ALERT
*  INTO TABLE @DATA(IT_LXDCKM_LDOCV_ALERT2).
*--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_LDOCV_ALERT INDEX 1 INTO DATA(WA_LXDCKM_LDOCV_ALERT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXDCKM_LDOCV_ALERT>-LIGHTS = 1.
<LXDCKM_LDOCV_ALERT>-LGNUM = 1.
<LXDCKM_LDOCV_ALERT>-DOCTY = 1.
<LXDCKM_LDOCV_ALERT>-DOCNR = 1.
<LXDCKM_LDOCV_ALERT>-DOCPR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXDCKM_LDOCV_ALERT-TKNUM, sy-vline,
  WA_LXDCKM_LDOCV_ALERT-XPLDT, sy-vline,
  WA_LXDCKM_LDOCV_ALERT-RLSDT, sy-vline,
  WA_LXDCKM_LDOCV_ALERT-MTCDT, sy-vline,
  WA_LXDCKM_LDOCV_ALERT-KODAT, sy-vline,
  WA_LXDCKM_LDOCV_ALERT-LDDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXDCKM_LDOCV_ALERT 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_LDOCV_ALERT 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_LDOCV_ALERT INTO WA_LXDCKM_LDOCV_ALERT.


*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_LXDCKM_LDOCV_ALERT-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_LDOCV_ALERT-DOCNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field GRPNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXDCKM_LDOCV_ALERT-GRPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXDCKM_LDOCV_ALERT-GRPNR.
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_LDOCV_ALERT_STR, 
LIGHTS TYPE STRING,
LGNUM TYPE STRING,
DOCTY TYPE STRING,
DOCNR TYPE STRING,
DOCPR TYPE STRING,
TKNUM TYPE STRING,
XPLDT TYPE STRING,
RLSDT TYPE STRING,
MTCDT TYPE STRING,
KODAT TYPE STRING,
LDDAT TYPE STRING,
TDDAT TYPE STRING,
WADAT TYPE STRING,
LFDAT TYPE STRING,
VKORG TYPE STRING,
VTWIV TYPE STRING,
VSTEL TYPE STRING,
PRVBE TYPE STRING,
TERNR TYPE STRING,
KUNAG TYPE STRING,
KUNNR TYPE STRING,
KDGRP TYPE STRING,
AULWE TYPE STRING,
LSTEL TYPE STRING,
ABLAD TYPE STRING,
VSART TYPE STRING,
GMSTS TYPE STRING,
VSBED TYPE STRING,
LIFNR TYPE STRING,
LIFEX TYPE STRING,
BENUM TYPE STRING,
LZNUM TYPE STRING,
TRAID TYPE STRING,
ITEMS TYPE STRING,
GRPNR TYPE STRING,
IMWRK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXDCKM_LDOCV_ALERT_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_LDOCV_ALERT_STR-LIGHTS sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LGNUM sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-DOCTY sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-DOCNR sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-DOCPR sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-TKNUM sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-XPLDT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-RLSDT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-MTCDT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-KODAT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LDDAT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-TDDAT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-WADAT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LFDAT sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-VKORG sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-VTWIV sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-VSTEL sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-PRVBE sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-TERNR sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-KUNAG sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-KUNNR sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-KDGRP sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-AULWE sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LSTEL sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-ABLAD sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-VSART sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-GMSTS sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-VSBED sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LIFNR sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LIFEX sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-BENUM sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-LZNUM sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-TRAID sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-ITEMS sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-GRPNR sy-vline 
WA_LXDCKM_LDOCV_ALERT_STR-IMWRK sy-vline      INTO ld_text SEPARATED BY SPACE.

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