ABAP Select data from SAP table LVC_MONOMS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LVC_MONOMS
*  INTO TABLE @DATA(IT_LVC_MONOMS2).
*--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_LVC_MONOMS INDEX 1 INTO DATA(WA_LVC_MONOMS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LVC_MONOMS>-IID = 1.
<LVC_MONOMS>-METHODE = 1.
<LVC_MONOMS>-CALL_CNT = 1.
<LVC_MONOMS>-AVG_RTIME = 1.
<LVC_MONOMS>-SUM_RTIME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LVC_MONOMS-MIN_RTIME, sy-vline,
  WA_LVC_MONOMS-MAX_RTIME, sy-vline,
  WA_LVC_MONOMS-AVGNRTIME, sy-vline,
  WA_LVC_MONOMS-SUMNRTIME, sy-vline,
  WA_LVC_MONOMS-OMS_DEREF, sy-vline,
  WA_LVC_MONOMS-LC_DEREF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LVC_MONOMS 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_LVC_MONOMS 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_LVC_MONOMS INTO WA_LVC_MONOMS.


*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_LVC_MONOMS_STR, 
IID TYPE STRING,
METHODE TYPE STRING,
CALL_CNT TYPE STRING,
AVG_RTIME TYPE STRING,
SUM_RTIME TYPE STRING,
MIN_RTIME TYPE STRING,
MAX_RTIME TYPE STRING,
AVGNRTIME TYPE STRING,
SUMNRTIME TYPE STRING,
OMS_DEREF TYPE STRING,
LC_DEREF TYPE STRING,
KEY_DEREF TYPE STRING,
KEY_DEREFV TYPE STRING,
OMS_STORE TYPE STRING,
LC_STORE TYPE STRING,
OMSDELETE TYPE STRING,
LC_DELETE TYPE STRING,
LC_LOCK TYPE STRING,
DEREFITER TYPE STRING,
LC_LOGHOPS TYPE STRING,
LCLOGHOPSI TYPE STRING,
EXCEPTIONS TYPE STRING,
OUTOFDATE TYPE STRING,
TIMEOUTS TYPE STRING,
SUBT_ROLLB TYPE STRING,
SUBTCOMMIT TYPE STRING,
MAX_SUBTL TYPE STRING,
VAROBJLOAD TYPE STRING,
VAROBJSTOR TYPE STRING,
AVGVOBSIZE TYPE STRING,
OMSCASIZE TYPE STRING,
MAXWAITNCV TYPE STRING,
MINWAITNCV TYPE STRING,
AVGWAITNCV TYPE STRING,
MALLOCCNT TYPE STRING,
MALLOCMIN TYPE STRING,
MALLOCMAX TYPE STRING,
MALLOCAVG TYPE STRING,
FREECNT TYPE STRING,
FREEMIN TYPE STRING,
FREEMAX TYPE STRING,
FREEAVG TYPE STRING,
OUTOFMEMEX TYPE STRING,
DALLOCMIN TYPE STRING,
DALLOCMAX TYPE STRING,
DALLOCAVG TYPE STRING,
OMS_TERMS TYPE STRING,
MINSTRBRR TYPE STRING,
MAXSTRBRR TYPE STRING,
AVGSTRBRR TYPE STRING,
MINSTR_RR TYPE STRING,
MAXSTR_RR TYPE STRING,
AVGSTR_RR TYPE STRING,
MINSTRBWR TYPE STRING,
MAXSTRBWR TYPE STRING,
AVGSTRBWR TYPE STRING,
MINSTR_RW TYPE STRING,
MAXSTR_RW TYPE STRING,
AVGSTR_RW TYPE STRING,
OMSKEYCHIT TYPE STRING,
OMSKEYCMIS TYPE STRING,
OMSKEYVERS TYPE STRING,
OMSMAXCHLN TYPE STRING,
OMSREHASH TYPE STRING,
LOCKOBWAIT TYPE STRING,
LOCKOBAVWT TYPE STRING,
PARTITIONID TYPE STRING,
TENANT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LVC_MONOMS_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_LVC_MONOMS_STR-IID sy-vline 
WA_LVC_MONOMS_STR-METHODE sy-vline 
WA_LVC_MONOMS_STR-CALL_CNT sy-vline 
WA_LVC_MONOMS_STR-AVG_RTIME sy-vline 
WA_LVC_MONOMS_STR-SUM_RTIME sy-vline 
WA_LVC_MONOMS_STR-MIN_RTIME sy-vline 
WA_LVC_MONOMS_STR-MAX_RTIME sy-vline 
WA_LVC_MONOMS_STR-AVGNRTIME sy-vline 
WA_LVC_MONOMS_STR-SUMNRTIME sy-vline 
WA_LVC_MONOMS_STR-OMS_DEREF sy-vline 
WA_LVC_MONOMS_STR-LC_DEREF sy-vline 
WA_LVC_MONOMS_STR-KEY_DEREF sy-vline 
WA_LVC_MONOMS_STR-KEY_DEREFV sy-vline 
WA_LVC_MONOMS_STR-OMS_STORE sy-vline 
WA_LVC_MONOMS_STR-LC_STORE sy-vline 
WA_LVC_MONOMS_STR-OMSDELETE sy-vline 
WA_LVC_MONOMS_STR-LC_DELETE sy-vline 
WA_LVC_MONOMS_STR-LC_LOCK sy-vline 
WA_LVC_MONOMS_STR-DEREFITER sy-vline 
WA_LVC_MONOMS_STR-LC_LOGHOPS sy-vline 
WA_LVC_MONOMS_STR-LCLOGHOPSI sy-vline 
WA_LVC_MONOMS_STR-EXCEPTIONS sy-vline 
WA_LVC_MONOMS_STR-OUTOFDATE sy-vline 
WA_LVC_MONOMS_STR-TIMEOUTS sy-vline 
WA_LVC_MONOMS_STR-SUBT_ROLLB sy-vline 
WA_LVC_MONOMS_STR-SUBTCOMMIT sy-vline 
WA_LVC_MONOMS_STR-MAX_SUBTL sy-vline 
WA_LVC_MONOMS_STR-VAROBJLOAD sy-vline 
WA_LVC_MONOMS_STR-VAROBJSTOR sy-vline 
WA_LVC_MONOMS_STR-AVGVOBSIZE sy-vline 
WA_LVC_MONOMS_STR-OMSCASIZE sy-vline 
WA_LVC_MONOMS_STR-MAXWAITNCV sy-vline 
WA_LVC_MONOMS_STR-MINWAITNCV sy-vline 
WA_LVC_MONOMS_STR-AVGWAITNCV sy-vline 
WA_LVC_MONOMS_STR-MALLOCCNT sy-vline 
WA_LVC_MONOMS_STR-MALLOCMIN sy-vline 
WA_LVC_MONOMS_STR-MALLOCMAX sy-vline 
WA_LVC_MONOMS_STR-MALLOCAVG sy-vline 
WA_LVC_MONOMS_STR-FREECNT sy-vline 
WA_LVC_MONOMS_STR-FREEMIN sy-vline 
WA_LVC_MONOMS_STR-FREEMAX sy-vline 
WA_LVC_MONOMS_STR-FREEAVG sy-vline 
WA_LVC_MONOMS_STR-OUTOFMEMEX sy-vline 
WA_LVC_MONOMS_STR-DALLOCMIN sy-vline 
WA_LVC_MONOMS_STR-DALLOCMAX sy-vline 
WA_LVC_MONOMS_STR-DALLOCAVG sy-vline 
WA_LVC_MONOMS_STR-OMS_TERMS sy-vline 
WA_LVC_MONOMS_STR-MINSTRBRR sy-vline 
WA_LVC_MONOMS_STR-MAXSTRBRR sy-vline 
WA_LVC_MONOMS_STR-AVGSTRBRR sy-vline 
WA_LVC_MONOMS_STR-MINSTR_RR sy-vline 
WA_LVC_MONOMS_STR-MAXSTR_RR sy-vline 
WA_LVC_MONOMS_STR-AVGSTR_RR sy-vline 
WA_LVC_MONOMS_STR-MINSTRBWR sy-vline 
WA_LVC_MONOMS_STR-MAXSTRBWR sy-vline 
WA_LVC_MONOMS_STR-AVGSTRBWR sy-vline 
WA_LVC_MONOMS_STR-MINSTR_RW sy-vline 
WA_LVC_MONOMS_STR-MAXSTR_RW sy-vline 
WA_LVC_MONOMS_STR-AVGSTR_RW sy-vline 
WA_LVC_MONOMS_STR-OMSKEYCHIT sy-vline 
WA_LVC_MONOMS_STR-OMSKEYCMIS sy-vline 
WA_LVC_MONOMS_STR-OMSKEYVERS sy-vline 
WA_LVC_MONOMS_STR-OMSMAXCHLN sy-vline 
WA_LVC_MONOMS_STR-OMSREHASH sy-vline 
WA_LVC_MONOMS_STR-LOCKOBWAIT sy-vline 
WA_LVC_MONOMS_STR-LOCKOBAVWT sy-vline 
WA_LVC_MONOMS_STR-PARTITIONID sy-vline 
WA_LVC_MONOMS_STR-TENANT sy-vline      INTO ld_text SEPARATED BY SPACE.

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