ABAP Select data from SAP table LTR2_UI_S_ES_TRULE_FIELD_MAP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LTR2_UI_S_ES_TRULE_FIELD_MAP 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 LTR2_UI_S_ES_TRULE_FIELD_MAP. 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 LTR2_UI_S_ES_TRULE_FIELD_MAP 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_LTR2_UI_S_ES_TRULE_FIELD_MAP TYPE STANDARD TABLE OF LTR2_UI_S_ES_TRULE_FIELD_MAP,
      WA_LTR2_UI_S_ES_TRULE_FIELD_MAP TYPE LTR2_UI_S_ES_TRULE_FIELD_MAP,
      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: <LTR2_UI_S_ES_TRULE_FIELD_MAP> TYPE LTR2_UI_S_ES_TRULE_FIELD_MAP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_LTR2_UI_S_ES_TRULE_FIELD_MAP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM LTR2_UI_S_ES_TRULE_FIELD_MAP
  INTO TABLE IT_LTR2_UI_S_ES_TRULE_FIELD_MAP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LTR2_UI_S_ES_TRULE_FIELD_MAP
*  INTO TABLE @DATA(IT_LTR2_UI_S_ES_TRULE_FIELD_MAP2).
*--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_LTR2_UI_S_ES_TRULE_FIELD_MAP INDEX 1 INTO DATA(WA_LTR2_UI_S_ES_TRULE_FIELD_MAP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_LTR2_UI_S_ES_TRULE_FIELD_MAP ASSIGNING <LTR2_UI_S_ES_TRULE_FIELD_MAP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LTR2_UI_S_ES_TRULE_FIELD_MAP>-PARID = 1.
<LTR2_UI_S_ES_TRULE_FIELD_MAP>-PARENT_PARID = 1.
<LTR2_UI_S_ES_TRULE_FIELD_MAP>-SEQNO = 1.
<LTR2_UI_S_ES_TRULE_FIELD_MAP>-PARNAME = 1.
<LTR2_UI_S_ES_TRULE_FIELD_MAP>-PAR_IF_KIND = 1.

ENDLOOP.

LOOP AT IT_LTR2_UI_S_ES_TRULE_FIELD_MAP INTO WA_LTR2_UI_S_ES_TRULE_FIELD_MAP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-PAR_IF_TYPE, sy-vline,
  WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-IS_KEY, sy-vline,
  WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-IS_OPTIONAL, sy-vline,
  WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-TYPEKIND, sy-vline,
  WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-TYPENAME, sy-vline,
  WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-ROLLNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LTR2_UI_S_ES_TRULE_FIELD_MAP 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_LTR2_UI_S_ES_TRULE_FIELD_MAP 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_LTR2_UI_S_ES_TRULE_FIELD_MAP INTO WA_LTR2_UI_S_ES_TRULE_FIELD_MAP.


*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 DTYPE, internal->external for field DATATYPE
CALL FUNCTION 'CONVERSION_EXIT_DTYPE_OUTPUT'
  EXPORTING
    input =                      WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-DATATYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LTR2_UI_S_ES_TRULE_FIELD_MAP-DATATYPE.
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_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR, 
PARID TYPE STRING,
PARENT_PARID TYPE STRING,
SEQNO TYPE STRING,
PARNAME TYPE STRING,
PAR_IF_KIND TYPE STRING,
PAR_IF_TYPE TYPE STRING,
IS_KEY TYPE STRING,
IS_OPTIONAL TYPE STRING,
TYPEKIND TYPE STRING,
TYPENAME TYPE STRING,
ROLLNAME TYPE STRING,
DOMNAME TYPE STRING,
INTTYPE TYPE STRING,
LENG TYPE STRING,
DECIMALS TYPE STRING,
DATATYPE TYPE STRING,
INTLEN TYPE STRING,
OUTPUTLEN TYPE STRING,
LOWERCASE TYPE STRING,
CONVEXIT TYPE STRING,
REFFIELD TYPE STRING,
REFTABLE TYPE STRING,
TEXT TYPE STRING,
STXT TYPE STRING,
MTXT TYPE STRING,
LTXT TYPE STRING,
IS_SQLTAB_KEY TYPE STRING,
TRULE_ID TYPE STRING,
TRULE_NAME TYPE STRING,
PARAMETER_HOTSPOT TYPE STRING,
TRULE_INFO_HOTSPOT TYPE STRING,
PARAMETERS TYPE STRING,
RAS_SEQNO TYPE STRING,
LINE_COLOR TYPE STRING,
CELLS TYPE STRING,
OWNER_NAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_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_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PARID sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PARENT_PARID sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-SEQNO sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PARNAME sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PAR_IF_KIND sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PAR_IF_TYPE sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-IS_KEY sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-IS_OPTIONAL sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-TYPEKIND sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-TYPENAME sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-ROLLNAME sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-DOMNAME sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-INTTYPE sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-LENG sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-DECIMALS sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-DATATYPE sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-INTLEN sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-OUTPUTLEN sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-LOWERCASE sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-CONVEXIT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-REFFIELD sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-REFTABLE sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-TEXT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-STXT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-MTXT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-LTXT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-IS_SQLTAB_KEY sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-TRULE_ID sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-TRULE_NAME sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PARAMETER_HOTSPOT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-TRULE_INFO_HOTSPOT sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-PARAMETERS sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-RAS_SEQNO sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-LINE_COLOR sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-CELLS sy-vline 
WA_LTR2_UI_S_ES_TRULE_FIELD_MAP_STR-OWNER_NAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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