ABAP Select data from SAP table /SAPDMC/LSGUSDFI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPDMC/LSGUSDFI 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 /SAPDMC/LSGUSDFI. 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 /SAPDMC/LSGUSDFI 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_/SAPDMC/LSGUSDFI TYPE STANDARD TABLE OF /SAPDMC/LSGUSDFI,
      WA_/SAPDMC/LSGUSDFI TYPE /SAPDMC/LSGUSDFI,
      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: </SAPDMC/LSGUSDFI> TYPE /SAPDMC/LSGUSDFI.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPDMC/LSGUSDFI
  INTO TABLE IT_/SAPDMC/LSGUSDFI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPDMC/LSGUSDFI
*  INTO TABLE @DATA(IT_/SAPDMC/LSGUSDFI2).
*--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_/SAPDMC/LSGUSDFI INDEX 1 INTO DATA(WA_/SAPDMC/LSGUSDFI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPDMC/LSGUSDFI ASSIGNING </SAPDMC/LSGUSDFI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPDMC/LSGUSDFI>-FILENAME = 1.
</SAPDMC/LSGUSDFI>-HOST = 1.
</SAPDMC/LSGUSDFI>-TIMESTAMP = 1.
</SAPDMC/LSGUSDFI>-PROJECT = 1.
</SAPDMC/LSGUSDFI>-SUBPROJ = 1.

ENDLOOP.

LOOP AT IT_/SAPDMC/LSGUSDFI INTO WA_/SAPDMC/LSGUSDFI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPDMC/LSGUSDFI-OBJECT, sy-vline,
  WA_/SAPDMC/LSGUSDFI-LOCATION, sy-vline,
  WA_/SAPDMC/LSGUSDFI-FILETYPE, sy-vline,
  WA_/SAPDMC/LSGUSDFI-SRCSTR, sy-vline,
  WA_/SAPDMC/LSGUSDFI-ACTION, sy-vline,
  WA_/SAPDMC/LSGUSDFI-BATCH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPDMC/LSGUSDFI 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_/SAPDMC/LSGUSDFI 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_/SAPDMC/LSGUSDFI INTO WA_/SAPDMC/LSGUSDFI.


*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_/SAPDMC/LSGUSDFI_STR, 
FILENAME TYPE STRING,
HOST TYPE STRING,
TIMESTAMP TYPE STRING,
PROJECT TYPE STRING,
SUBPROJ TYPE STRING,
OBJECT TYPE STRING,
LOCATION TYPE STRING,
FILETYPE TYPE STRING,
SRCSTR TYPE STRING,
ACTION TYPE STRING,
BATCH TYPE STRING,
FROMDX TYPE STRING,
UNAME TYPE STRING,
CLIENT TYPE STRING,
R_TRANSACTIONS TYPE STRING,
T_TRANSACTIONS TYPE STRING,
R_RECORDS TYPE STRING,
T_RECORDS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPDMC/LSGUSDFI_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_/SAPDMC/LSGUSDFI_STR-FILENAME sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-HOST sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-TIMESTAMP sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-PROJECT sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-SUBPROJ sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-OBJECT sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-LOCATION sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-FILETYPE sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-SRCSTR sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-ACTION sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-BATCH sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-FROMDX sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-UNAME sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-CLIENT sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-R_TRANSACTIONS sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-T_TRANSACTIONS sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-R_RECORDS sy-vline 
WA_/SAPDMC/LSGUSDFI_STR-T_RECORDS sy-vline      INTO ld_text SEPARATED BY SPACE.

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