ABAP Select data from SAP table LSOLEARNESIGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LSOLEARNESIGN
*  INTO TABLE @DATA(IT_LSOLEARNESIGN2).
*--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_LSOLEARNESIGN INDEX 1 INTO DATA(WA_LSOLEARNESIGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LSOLEARNESIGN>-MANDT = 1.
<LSOLEARNESIGN>-PLVAR = 1.
<LSOLEARNESIGN>-TRAINING_TYP = 1.
<LSOLEARNESIGN>-TRAINING_ID = 1.
<LSOLEARNESIGN>-LEARNER_TYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LSOLEARNESIGN-LEARNER_ID, sy-vline,
  WA_LSOLEARNESIGN-RELAT, sy-vline,
  WA_LSOLEARNESIGN-ISTAT, sy-vline,
  WA_LSOLEARNESIGN-PRIOX, sy-vline,
  WA_LSOLEARNESIGN-BEGDA, sy-vline,
  WA_LSOLEARNESIGN-ENDDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LSOLEARNESIGN 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_LSOLEARNESIGN 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_LSOLEARNESIGN INTO WA_LSOLEARNESIGN.


*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 ISOLA, internal->external for field SIGN_LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_LSOLEARNESIGN-SIGN_LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LSOLEARNESIGN-SIGN_LANGU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TPARTDOCNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LSOLEARNESIGN-TPARTDOCNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LSOLEARNESIGN-TPARTDOCNO.
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_LSOLEARNESIGN_STR, 
MANDT TYPE STRING,
PLVAR TYPE STRING,
TRAINING_TYP TYPE STRING,
TRAINING_ID TYPE STRING,
LEARNER_TYP TYPE STRING,
LEARNER_ID TYPE STRING,
RELAT TYPE STRING,
ISTAT TYPE STRING,
PRIOX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SEQNR TYPE STRING,
ENTRY TYPE STRING,
PROCESS TYPE STRING,
PPROCESS TYPE STRING,
SIGNER TYPE STRING,
LEARNERNAME TYPE STRING,
LEARNER_TZONE TYPE STRING,
LEARNER_TIMEST TYPE STRING,
GLOBAL_TZONE TYPE STRING,
GLOBAL_TIMEST TYPE STRING,
SIGN_LANGU TYPE STRING,
SIGREASON TYPE STRING,
AUTH_IND TYPE STRING,
TPARTDOCNO TYPE STRING,
SIGN_DRULE TYPE STRING,
SSFAPPLIC TYPE STRING,
SIGNMETHOD TYPE STRING,
SIGN_DOC TYPE STRING,
SIGNATURE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LSOLEARNESIGN_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_LSOLEARNESIGN_STR-MANDT sy-vline 
WA_LSOLEARNESIGN_STR-PLVAR sy-vline 
WA_LSOLEARNESIGN_STR-TRAINING_TYP sy-vline 
WA_LSOLEARNESIGN_STR-TRAINING_ID sy-vline 
WA_LSOLEARNESIGN_STR-LEARNER_TYP sy-vline 
WA_LSOLEARNESIGN_STR-LEARNER_ID sy-vline 
WA_LSOLEARNESIGN_STR-RELAT sy-vline 
WA_LSOLEARNESIGN_STR-ISTAT sy-vline 
WA_LSOLEARNESIGN_STR-PRIOX sy-vline 
WA_LSOLEARNESIGN_STR-BEGDA sy-vline 
WA_LSOLEARNESIGN_STR-ENDDA sy-vline 
WA_LSOLEARNESIGN_STR-SEQNR sy-vline 
WA_LSOLEARNESIGN_STR-ENTRY sy-vline 
WA_LSOLEARNESIGN_STR-PROCESS sy-vline 
WA_LSOLEARNESIGN_STR-PPROCESS sy-vline 
WA_LSOLEARNESIGN_STR-SIGNER sy-vline 
WA_LSOLEARNESIGN_STR-LEARNERNAME sy-vline 
WA_LSOLEARNESIGN_STR-LEARNER_TZONE sy-vline 
WA_LSOLEARNESIGN_STR-LEARNER_TIMEST sy-vline 
WA_LSOLEARNESIGN_STR-GLOBAL_TZONE sy-vline 
WA_LSOLEARNESIGN_STR-GLOBAL_TIMEST sy-vline 
WA_LSOLEARNESIGN_STR-SIGN_LANGU sy-vline 
WA_LSOLEARNESIGN_STR-SIGREASON sy-vline 
WA_LSOLEARNESIGN_STR-AUTH_IND sy-vline 
WA_LSOLEARNESIGN_STR-TPARTDOCNO sy-vline 
WA_LSOLEARNESIGN_STR-SIGN_DRULE sy-vline 
WA_LSOLEARNESIGN_STR-SSFAPPLIC sy-vline 
WA_LSOLEARNESIGN_STR-SIGNMETHOD sy-vline 
WA_LSOLEARNESIGN_STR-SIGN_DOC sy-vline 
WA_LSOLEARNESIGN_STR-SIGNATURE sy-vline      INTO ld_text SEPARATED BY SPACE.

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