ABAP Select data from SAP table LXHME_DECTO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXHME_DECTO
*  INTO TABLE @DATA(IT_LXHME_DECTO2).
*--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_LXHME_DECTO INDEX 1 INTO DATA(WA_LXHME_DECTO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXHME_DECTO>-TANUM = 1.
<LXHME_DECTO>-TAPOS = 1.
<LXHME_DECTO>-DCNUM = 1.
<LXHME_DECTO>-REFTY = 1.
<LXHME_DECTO>-DOCTY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXHME_DECTO-DOCNR, sy-vline,
  WA_LXHME_DECTO-DOCIT, sy-vline,
  WA_LXHME_DECTO-QTYTO, sy-vline,
  WA_LXHME_DECTO-ACQTY, sy-vline,
  WA_LXHME_DECTO-DFQTY, sy-vline,
  WA_LXHME_DECTO-SFQTY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXHME_DECTO 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_LXHME_DECTO 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_LXHME_DECTO INTO WA_LXHME_DECTO.


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

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

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

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

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

*Conversion exit ALPHA, internal->external for field SONUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LXHME_DECTO-SONUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXHME_DECTO-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_LXHME_DECTO_STR, 
TANUM TYPE STRING,
TAPOS TYPE STRING,
DCNUM TYPE STRING,
REFTY TYPE STRING,
DOCTY TYPE STRING,
DOCNR TYPE STRING,
DOCIT TYPE STRING,
QTYTO TYPE STRING,
ACQTY TYPE STRING,
DFQTY TYPE STRING,
SFQTY TYPE STRING,
UOMBS TYPE STRING,
NWIRM TYPE STRING,
WIRME TYPE STRING,
CNFST TYPE STRING,
SRCNF TYPE STRING,
CNFDB TYPE STRING,
SRCDB TYPE STRING,
CSTEP TYPE STRING,
TRUPD TYPE STRING,
EXIDV TYPE STRING,
HUMAN TYPE STRING,
ZRSTG TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
CHARG TYPE STRING,
BESTQ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXHME_DECTO_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_LXHME_DECTO_STR-TANUM sy-vline 
WA_LXHME_DECTO_STR-TAPOS sy-vline 
WA_LXHME_DECTO_STR-DCNUM sy-vline 
WA_LXHME_DECTO_STR-REFTY sy-vline 
WA_LXHME_DECTO_STR-DOCTY sy-vline 
WA_LXHME_DECTO_STR-DOCNR sy-vline 
WA_LXHME_DECTO_STR-DOCIT sy-vline 
WA_LXHME_DECTO_STR-QTYTO sy-vline 
WA_LXHME_DECTO_STR-ACQTY sy-vline 
WA_LXHME_DECTO_STR-DFQTY sy-vline 
WA_LXHME_DECTO_STR-SFQTY sy-vline 
WA_LXHME_DECTO_STR-UOMBS sy-vline 
WA_LXHME_DECTO_STR-NWIRM sy-vline 
WA_LXHME_DECTO_STR-WIRME sy-vline 
WA_LXHME_DECTO_STR-CNFST sy-vline 
WA_LXHME_DECTO_STR-SRCNF sy-vline 
WA_LXHME_DECTO_STR-CNFDB sy-vline 
WA_LXHME_DECTO_STR-SRCDB sy-vline 
WA_LXHME_DECTO_STR-CSTEP sy-vline 
WA_LXHME_DECTO_STR-TRUPD sy-vline 
WA_LXHME_DECTO_STR-EXIDV sy-vline 
WA_LXHME_DECTO_STR-HUMAN sy-vline 
WA_LXHME_DECTO_STR-ZRSTG sy-vline 
WA_LXHME_DECTO_STR-MATNR sy-vline 
WA_LXHME_DECTO_STR-WERKS sy-vline 
WA_LXHME_DECTO_STR-LGORT sy-vline 
WA_LXHME_DECTO_STR-SOBKZ sy-vline 
WA_LXHME_DECTO_STR-SONUM sy-vline 
WA_LXHME_DECTO_STR-CHARG sy-vline 
WA_LXHME_DECTO_STR-BESTQ sy-vline      INTO ld_text SEPARATED BY SPACE.

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