ABAP Select data from SAP table CXLST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CXLST
*  INTO TABLE @DATA(IT_CXLST2).
*--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_CXLST INDEX 1 INTO DATA(WA_CXLST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CXLST>-PLNUM = 1.
<CXLST>-SAFNR = 1.
<CXLST>-MATNR = 1.
<CXLST>-WERKS = 1.
<CXLST>-KOSTL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CXLST-LSTAR, sy-vline,
  WA_CXLST-MENGE, sy-vline,
  WA_CXLST-MNGEH, sy-vline,
  WA_CXLST-SSAVD, sy-vline,
  WA_CXLST-SSAVZ, sy-vline,
  WA_CXLST-SSEDD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CXLST 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_CXLST 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_CXLST INTO WA_CXLST.


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

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

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

*Conversion exit CUNIT, internal->external for field MNGEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CXLST-MNGEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CXLST-MNGEH.
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_CXLST_STR, 
PLNUM TYPE STRING,
SAFNR TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
KOSTL TYPE STRING,
LSTAR TYPE STRING,
MENGE TYPE STRING,
MNGEH TYPE STRING,
SSAVD TYPE STRING,
SSAVZ TYPE STRING,
SSEDD TYPE STRING,
SSEDZ TYPE STRING,
KALID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CXLST_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_CXLST_STR-PLNUM sy-vline 
WA_CXLST_STR-SAFNR sy-vline 
WA_CXLST_STR-MATNR sy-vline 
WA_CXLST_STR-WERKS sy-vline 
WA_CXLST_STR-KOSTL sy-vline 
WA_CXLST_STR-LSTAR sy-vline 
WA_CXLST_STR-MENGE sy-vline 
WA_CXLST_STR-MNGEH sy-vline 
WA_CXLST_STR-SSAVD sy-vline 
WA_CXLST_STR-SSAVZ sy-vline 
WA_CXLST_STR-SSEDD sy-vline 
WA_CXLST_STR-SSEDZ sy-vline 
WA_CXLST_STR-KALID sy-vline      INTO ld_text SEPARATED BY SPACE.

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