ABAP Select data from SAP table LCM_IDX_LD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LCM_IDX_LD
*  INTO TABLE @DATA(IT_LCM_IDX_LD2).
*--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_LCM_IDX_LD INDEX 1 INTO DATA(WA_LCM_IDX_LD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LCM_IDX_LD>-MANDT = 1.
<LCM_IDX_LD>-MSGGUID = 1.
<LCM_IDX_LD>-NS = 1.
<LCM_IDX_LD>-IFNAME = 1.
<LCM_IDX_LD>-IFVER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LCM_IDX_LD-NUMBEROFABORTS, sy-vline,
  WA_LCM_IDX_LD-NUMBEROFERRORS, sy-vline,
  WA_LCM_IDX_LD-NUMBEROFWARNINGS, sy-vline,
  WA_LCM_IDX_LD-NUMBEROFSUCCESS, sy-vline,
  WA_LCM_IDX_LD-NUMBEROFINFOS, sy-vline,
  WA_LCM_IDX_LD-NSRECIP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LCM_IDX_LD 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_LCM_IDX_LD 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_LCM_IDX_LD INTO WA_LCM_IDX_LD.


*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_LCM_IDX_LD_STR, 
MANDT TYPE STRING,
MSGGUID TYPE STRING,
NS TYPE STRING,
IFNAME TYPE STRING,
IFVER TYPE STRING,
NUMBEROFABORTS TYPE STRING,
NUMBEROFERRORS TYPE STRING,
NUMBEROFWARNINGS TYPE STRING,
NUMBEROFSUCCESS TYPE STRING,
NUMBEROFINFOS TYPE STRING,
NSRECIP TYPE STRING,
RECIPIENT TYPE STRING,
STATUS TYPE STRING,
SUB_STATUS TYPE STRING,
AIF_LOCATION TYPE STRING,
LOGNUMBER TYPE STRING,
TRACE_LEVEL TYPE STRING,
TL_EXP_DATE TYPE STRING,
TL_EXP_TIME TYPE STRING,
CREATE_USER TYPE STRING,
CREATE_DATE TYPE STRING,
CREATE_TIME TYPE STRING,
LAST_USER TYPE STRING,
LAST_DATE TYPE STRING,
LAST_TIME TYPE STRING,
END_USER TYPE STRING,
END_DATE TYPE STRING,
END_TIME TYPE STRING,
AIF_ALERT_ID TYPE STRING,
AIF_VARIANT_NS TYPE STRING,
AIF_VARIANT_NAME TYPE STRING,
EXTERNAL_MESSAGE TYPE STRING,
TIME_ZONE TYPE STRING,
PROCESSING_END_TSTMP TYPE STRING,
PID TYPE STRING,
OPID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LCM_IDX_LD_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_LCM_IDX_LD_STR-MANDT sy-vline 
WA_LCM_IDX_LD_STR-MSGGUID sy-vline 
WA_LCM_IDX_LD_STR-NS sy-vline 
WA_LCM_IDX_LD_STR-IFNAME sy-vline 
WA_LCM_IDX_LD_STR-IFVER sy-vline 
WA_LCM_IDX_LD_STR-NUMBEROFABORTS sy-vline 
WA_LCM_IDX_LD_STR-NUMBEROFERRORS sy-vline 
WA_LCM_IDX_LD_STR-NUMBEROFWARNINGS sy-vline 
WA_LCM_IDX_LD_STR-NUMBEROFSUCCESS sy-vline 
WA_LCM_IDX_LD_STR-NUMBEROFINFOS sy-vline 
WA_LCM_IDX_LD_STR-NSRECIP sy-vline 
WA_LCM_IDX_LD_STR-RECIPIENT sy-vline 
WA_LCM_IDX_LD_STR-STATUS sy-vline 
WA_LCM_IDX_LD_STR-SUB_STATUS sy-vline 
WA_LCM_IDX_LD_STR-AIF_LOCATION sy-vline 
WA_LCM_IDX_LD_STR-LOGNUMBER sy-vline 
WA_LCM_IDX_LD_STR-TRACE_LEVEL sy-vline 
WA_LCM_IDX_LD_STR-TL_EXP_DATE sy-vline 
WA_LCM_IDX_LD_STR-TL_EXP_TIME sy-vline 
WA_LCM_IDX_LD_STR-CREATE_USER sy-vline 
WA_LCM_IDX_LD_STR-CREATE_DATE sy-vline 
WA_LCM_IDX_LD_STR-CREATE_TIME sy-vline 
WA_LCM_IDX_LD_STR-LAST_USER sy-vline 
WA_LCM_IDX_LD_STR-LAST_DATE sy-vline 
WA_LCM_IDX_LD_STR-LAST_TIME sy-vline 
WA_LCM_IDX_LD_STR-END_USER sy-vline 
WA_LCM_IDX_LD_STR-END_DATE sy-vline 
WA_LCM_IDX_LD_STR-END_TIME sy-vline 
WA_LCM_IDX_LD_STR-AIF_ALERT_ID sy-vline 
WA_LCM_IDX_LD_STR-AIF_VARIANT_NS sy-vline 
WA_LCM_IDX_LD_STR-AIF_VARIANT_NAME sy-vline 
WA_LCM_IDX_LD_STR-EXTERNAL_MESSAGE sy-vline 
WA_LCM_IDX_LD_STR-TIME_ZONE sy-vline 
WA_LCM_IDX_LD_STR-PROCESSING_END_TSTMP sy-vline 
WA_LCM_IDX_LD_STR-PID sy-vline 
WA_LCM_IDX_LD_STR-OPID sy-vline      INTO ld_text SEPARATED BY SPACE.

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