ABAP Select data from SAP table LXHME_LDCVI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LXHME_LDCVI 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_LDCVI. 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_LDCVI 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_LDCVI TYPE STANDARD TABLE OF LXHME_LDCVI,
      WA_LXHME_LDCVI TYPE LXHME_LDCVI,
      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_LDCVI> TYPE LXHME_LDCVI.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LXHME_LDCVI
*  INTO TABLE @DATA(IT_LXHME_LDCVI2).
*--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_LDCVI INDEX 1 INTO DATA(WA_LXHME_LDCVI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LXHME_LDCVI>-DOCIT = 1.
<LXHME_LDCVI>-MATNR = 1.
<LXHME_LDCVI>-MTART = 1.
<LXHME_LDCVI>-XCHAR = 1.
<LXHME_LDCVI>-CHARG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LXHME_LDCVI-WERKS, sy-vline,
  WA_LXHME_LDCVI-LGORT, sy-vline,
  WA_LXHME_LDCVI-MEINS, sy-vline,
  WA_LXHME_LDCVI-VRKME, sy-vline,
  WA_LXHME_LDCVI-LFIMG, sy-vline,
  WA_LXHME_LDCVI-LGMNG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LXHME_LDCVI 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_LDCVI 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_LDCVI INTO WA_LXHME_LDCVI.


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

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

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

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

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

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

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

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

*Conversion exit MATN1, internal->external for field RMATP
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_LXHME_LDCVI-RMATP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LXHME_LDCVI-RMATP.
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_LDCVI_STR, 
DOCIT TYPE STRING,
MATNR TYPE STRING,
MTART TYPE STRING,
XCHAR TYPE STRING,
CHARG TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
MEINS TYPE STRING,
VRKME TYPE STRING,
LFIMG TYPE STRING,
LGMNG TYPE STRING,
PIKMG TYPE STRING,
QTYPL TYPE STRING,
BESTQ TYPE STRING,
SOBKZ TYPE STRING,
SONUM TYPE STRING,
LETY1 TYPE STRING,
VFDAT TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
BWLVS TYPE STRING,
BWART TYPE STRING,
AKTNR TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
INPRS TYPE STRING,
TUNIT TYPE STRING,
LDQTY TYPE STRING,
LDUOM TYPE STRING,
LADGR TYPE STRING,
RMATP TYPE STRING,
BERID TYPE STRING,
ABRVW TYPE STRING,
DYNMC TYPE STRING,
FUNIT TYPE STRING,
HUDAT TYPE STRING,
DCKEY TYPE STRING,
LTAP_T TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LXHME_LDCVI_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_LDCVI_STR-DOCIT sy-vline 
WA_LXHME_LDCVI_STR-MATNR sy-vline 
WA_LXHME_LDCVI_STR-MTART sy-vline 
WA_LXHME_LDCVI_STR-XCHAR sy-vline 
WA_LXHME_LDCVI_STR-CHARG sy-vline 
WA_LXHME_LDCVI_STR-WERKS sy-vline 
WA_LXHME_LDCVI_STR-LGORT sy-vline 
WA_LXHME_LDCVI_STR-MEINS sy-vline 
WA_LXHME_LDCVI_STR-VRKME sy-vline 
WA_LXHME_LDCVI_STR-LFIMG sy-vline 
WA_LXHME_LDCVI_STR-LGMNG sy-vline 
WA_LXHME_LDCVI_STR-PIKMG sy-vline 
WA_LXHME_LDCVI_STR-QTYPL sy-vline 
WA_LXHME_LDCVI_STR-BESTQ sy-vline 
WA_LXHME_LDCVI_STR-SOBKZ sy-vline 
WA_LXHME_LDCVI_STR-SONUM sy-vline 
WA_LXHME_LDCVI_STR-LETY1 sy-vline 
WA_LXHME_LDCVI_STR-VFDAT sy-vline 
WA_LXHME_LDCVI_STR-LGTYP sy-vline 
WA_LXHME_LDCVI_STR-LGPLA sy-vline 
WA_LXHME_LDCVI_STR-BWLVS sy-vline 
WA_LXHME_LDCVI_STR-BWART sy-vline 
WA_LXHME_LDCVI_STR-AKTNR sy-vline 
WA_LXHME_LDCVI_STR-NTGEW sy-vline 
WA_LXHME_LDCVI_STR-GEWEI sy-vline 
WA_LXHME_LDCVI_STR-VOLUM sy-vline 
WA_LXHME_LDCVI_STR-VOLEH sy-vline 
WA_LXHME_LDCVI_STR-INPRS sy-vline 
WA_LXHME_LDCVI_STR-TUNIT sy-vline 
WA_LXHME_LDCVI_STR-LDQTY sy-vline 
WA_LXHME_LDCVI_STR-LDUOM sy-vline 
WA_LXHME_LDCVI_STR-LADGR sy-vline 
WA_LXHME_LDCVI_STR-RMATP sy-vline 
WA_LXHME_LDCVI_STR-BERID sy-vline 
WA_LXHME_LDCVI_STR-ABRVW sy-vline 
WA_LXHME_LDCVI_STR-DYNMC sy-vline 
WA_LXHME_LDCVI_STR-FUNIT sy-vline 
WA_LXHME_LDCVI_STR-HUDAT sy-vline 
WA_LXHME_LDCVI_STR-DCKEY sy-vline 
WA_LXHME_LDCVI_STR-LTAP_T sy-vline      INTO ld_text SEPARATED BY SPACE.

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