ABAP Select data from SAP table LLGTM into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LLGTM 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 LLGTM. 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 LLGTM 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_LLGTM TYPE STANDARD TABLE OF LLGTM,
      WA_LLGTM TYPE LLGTM,
      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: <LLGTM> TYPE LLGTM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LLGTM
*  INTO TABLE @DATA(IT_LLGTM2).
*--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_LLGTM INDEX 1 INTO DATA(WA_LLGTM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LLGTM>-MANDT = 1.
<LLGTM>-LOCAT = 1.
<LLGTM>-GRPRF = 1.
<LLGTM>-RSRCE = 1.
<LLGTM>-RSTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LLGTM-RQITM, sy-vline,
  WA_LLGTM-TSTMP, sy-vline,
  WA_LLGTM-SEQNC, sy-vline,
  WA_LLGTM-RZONEDST, sy-vline,
  WA_LLGTM-BINCXDST, sy-vline,
  WA_LLGTM-BINCYDST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LLGTM 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_LLGTM 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_LLGTM INTO WA_LLGTM.


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

*Conversion exit TSTRM, internal->external for field TSTMP
CALL FUNCTION 'CONVERSION_EXIT_TSTRM_OUTPUT'
  EXPORTING
    input =                      WA_LLGTM-TSTMP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LLGTM-TSTMP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TASKI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LLGTM-TASKI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LLGTM-TASKI.
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_LLGTM_STR, 
MANDT TYPE STRING,
LOCAT TYPE STRING,
GRPRF TYPE STRING,
RSRCE TYPE STRING,
RSTYP TYPE STRING,
RQITM TYPE STRING,
TSTMP TYPE STRING,
SEQNC TYPE STRING,
RZONEDST TYPE STRING,
BINCXDST TYPE STRING,
BINCYDST TYPE STRING,
BINCZDST TYPE STRING,
RNODEDST TYPE STRING,
RZONESRC TYPE STRING,
BINCXSRC TYPE STRING,
BINCYSRC TYPE STRING,
BINCZSRC TYPE STRING,
RNODESRC TYPE STRING,
TASKI TYPE STRING,
ACTIV TYPE STRING,
TTDUR TYPE STRING,
LTRM_DUMMY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LLGTM_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_LLGTM_STR-MANDT sy-vline 
WA_LLGTM_STR-LOCAT sy-vline 
WA_LLGTM_STR-GRPRF sy-vline 
WA_LLGTM_STR-RSRCE sy-vline 
WA_LLGTM_STR-RSTYP sy-vline 
WA_LLGTM_STR-RQITM sy-vline 
WA_LLGTM_STR-TSTMP sy-vline 
WA_LLGTM_STR-SEQNC sy-vline 
WA_LLGTM_STR-RZONEDST sy-vline 
WA_LLGTM_STR-BINCXDST sy-vline 
WA_LLGTM_STR-BINCYDST sy-vline 
WA_LLGTM_STR-BINCZDST sy-vline 
WA_LLGTM_STR-RNODEDST sy-vline 
WA_LLGTM_STR-RZONESRC sy-vline 
WA_LLGTM_STR-BINCXSRC sy-vline 
WA_LLGTM_STR-BINCYSRC sy-vline 
WA_LLGTM_STR-BINCZSRC sy-vline 
WA_LLGTM_STR-RNODESRC sy-vline 
WA_LLGTM_STR-TASKI sy-vline 
WA_LLGTM_STR-ACTIV sy-vline 
WA_LLGTM_STR-TTDUR sy-vline 
WA_LLGTM_STR-LTRM_DUMMY sy-vline      INTO ld_text SEPARATED BY SPACE.

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