ABAP Select data from SAP table LTHU_CREAT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTHU_CREAT
*  INTO TABLE @DATA(IT_LTHU_CREAT2).
*--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_LTHU_CREAT INDEX 1 INTO DATA(WA_LTHU_CREAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTHU_CREAT>-MANDT = 1.
<LTHU_CREAT>-EXIDV = 1.
<LTHU_CREAT>-VHILM = 1.
<LTHU_CREAT>-ANZHU = 1.
<LTHU_CREAT>-LGTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTHU_CREAT-LGPLA, sy-vline,
  WA_LTHU_CREAT-LETYP, sy-vline,
  WA_LTHU_CREAT-KZFIX, sy-vline,
  WA_LTHU_CREAT-KZRTN, sy-vline,
  WA_LTHU_CREAT-VBELN, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_LTHU_CREAT 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_LTHU_CREAT 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_LTHU_CREAT INTO WA_LTHU_CREAT.


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

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

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LTHU_CREAT-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTHU_CREAT-VBELN.
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_LTHU_CREAT_STR, 
MANDT TYPE STRING,
EXIDV TYPE STRING,
VHILM TYPE STRING,
ANZHU TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
LETYP TYPE STRING,
KZFIX TYPE STRING,
KZRTN TYPE STRING,
VBELN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTHU_CREAT_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_LTHU_CREAT_STR-MANDT sy-vline 
WA_LTHU_CREAT_STR-EXIDV sy-vline 
WA_LTHU_CREAT_STR-VHILM sy-vline 
WA_LTHU_CREAT_STR-ANZHU sy-vline 
WA_LTHU_CREAT_STR-LGTYP sy-vline 
WA_LTHU_CREAT_STR-LGPLA sy-vline 
WA_LTHU_CREAT_STR-LETYP sy-vline 
WA_LTHU_CREAT_STR-KZFIX sy-vline 
WA_LTHU_CREAT_STR-KZRTN sy-vline 
WA_LTHU_CREAT_STR-VBELN sy-vline      INTO ld_text SEPARATED BY SPACE.

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