ABAP Select data from SAP table LTEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTEX
*  INTO TABLE @DATA(IT_LTEX2).
*--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_LTEX INDEX 1 INTO DATA(WA_LTEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTEX>-MANDT = 1.
<LTEX>-RELID = 1.
<LTEX>-REPORT = 1.
<LTEX>-HANDLE = 1.
<LTEX>-LOG_GROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTEX-USERNAME, sy-vline,
  WA_LTEX-EXNAME, sy-vline,
  WA_LTEX-TYPE, sy-vline,
  WA_LTEX-DISVARIANT, sy-vline,
  WA_LTEX-SRTF2, sy-vline,
  WA_LTEX-TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTEX 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_LTEX 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_LTEX INTO WA_LTEX.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LTEX_STR, 
MANDT TYPE STRING,
RELID TYPE STRING,
REPORT TYPE STRING,
HANDLE TYPE STRING,
LOG_GROUP TYPE STRING,
USERNAME TYPE STRING,
EXNAME TYPE STRING,
TYPE TYPE STRING,
DISVARIANT TYPE STRING,
SRTF2 TYPE STRING,
TEXT TYPE STRING,
VERSION TYPE STRING,
ERFDAT TYPE STRING,
ERFTIME TYPE STRING,
ERFNAME TYPE STRING,
DATA TYPE STRING,
CLUSTR TYPE STRING,
CLUSTD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTEX_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_LTEX_STR-MANDT sy-vline 
WA_LTEX_STR-RELID sy-vline 
WA_LTEX_STR-REPORT sy-vline 
WA_LTEX_STR-HANDLE sy-vline 
WA_LTEX_STR-LOG_GROUP sy-vline 
WA_LTEX_STR-USERNAME sy-vline 
WA_LTEX_STR-EXNAME sy-vline 
WA_LTEX_STR-TYPE sy-vline 
WA_LTEX_STR-DISVARIANT sy-vline 
WA_LTEX_STR-SRTF2 sy-vline 
WA_LTEX_STR-TEXT sy-vline 
WA_LTEX_STR-VERSION sy-vline 
WA_LTEX_STR-ERFDAT sy-vline 
WA_LTEX_STR-ERFTIME sy-vline 
WA_LTEX_STR-ERFNAME sy-vline 
WA_LTEX_STR-DATA sy-vline 
WA_LTEX_STR-CLUSTR sy-vline 
WA_LTEX_STR-CLUSTD sy-vline      INTO ld_text SEPARATED BY SPACE.

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