ABAP Select data from SAP table LCM_VAR_REQ_RES into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP LCM_VAR_REQ_RES 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_VAR_REQ_RES. 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_VAR_REQ_RES 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_VAR_REQ_RES TYPE STANDARD TABLE OF LCM_VAR_REQ_RES,
      WA_LCM_VAR_REQ_RES TYPE LCM_VAR_REQ_RES,
      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_VAR_REQ_RES> TYPE LCM_VAR_REQ_RES.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LCM_VAR_REQ_RES
*  INTO TABLE @DATA(IT_LCM_VAR_REQ_RES2).
*--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_VAR_REQ_RES INDEX 1 INTO DATA(WA_LCM_VAR_REQ_RES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LCM_VAR_REQ_RES>-MANDT = 1.
<LCM_VAR_REQ_RES>-LGLCNTNTMDOCUMENT = 1.
<LCM_VAR_REQ_RES>-LANGUAGE = 1.
<LCM_VAR_REQ_RES>-LGLCNTNTMVARIABLEREQUESTUUID = 1.
<LCM_VAR_REQ_RES>-VARIABLEREQGROUPKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LCM_VAR_REQ_RES-LGLCNTNTMVIRTUALDOCVERSKEY, sy-vline,
  WA_LCM_VAR_REQ_RES-REQUESTEDVARIABLE, sy-vline,
  WA_LCM_VAR_REQ_RES-VARIABLERESPONSE, sy-vline,
  WA_LCM_VAR_REQ_RES-LGLCNTNTMCREATEDUTCDATETIME, sy-vline,
  WA_LCM_VAR_REQ_RES-DOCUMENTVERSION, sy-vline,
  WA_LCM_VAR_REQ_RES-LEGALDOCUMENTVERSION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LCM_VAR_REQ_RES 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_VAR_REQ_RES 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_VAR_REQ_RES INTO WA_LCM_VAR_REQ_RES.


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

*Conversion exit ALPHA, internal->external for field DOCUMENTVERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_VAR_REQ_RES-DOCUMENTVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_VAR_REQ_RES-DOCUMENTVERSION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LEGALDOCUMENTVERSION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_LCM_VAR_REQ_RES-LEGALDOCUMENTVERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_LCM_VAR_REQ_RES-LEGALDOCUMENTVERSION.
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_LCM_VAR_REQ_RES_STR, 
MANDT TYPE STRING,
LGLCNTNTMDOCUMENT TYPE STRING,
LANGUAGE TYPE STRING,
LGLCNTNTMVARIABLEREQUESTUUID TYPE STRING,
VARIABLEREQGROUPKEY TYPE STRING,
LGLCNTNTMVIRTUALDOCVERSKEY TYPE STRING,
REQUESTEDVARIABLE TYPE STRING,
VARIABLERESPONSE TYPE STRING,
LGLCNTNTMCREATEDUTCDATETIME TYPE STRING,
DOCUMENTVERSION TYPE STRING,
LEGALDOCUMENTVERSION TYPE STRING,
ORDERID TYPE STRING,
STATUS TYPE STRING,
PREVVARIABLEREQGROUPKEY TYPE STRING,
LOGCREATEDUTCDATETIME TYPE STRING,
REQUESTTYPE TYPE STRING,
ACTIONTYPE TYPE STRING,
TOTALPACKET TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LCM_VAR_REQ_RES_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_VAR_REQ_RES_STR-MANDT sy-vline 
WA_LCM_VAR_REQ_RES_STR-LGLCNTNTMDOCUMENT sy-vline 
WA_LCM_VAR_REQ_RES_STR-LANGUAGE sy-vline 
WA_LCM_VAR_REQ_RES_STR-LGLCNTNTMVARIABLEREQUESTUUID sy-vline 
WA_LCM_VAR_REQ_RES_STR-VARIABLEREQGROUPKEY sy-vline 
WA_LCM_VAR_REQ_RES_STR-LGLCNTNTMVIRTUALDOCVERSKEY sy-vline 
WA_LCM_VAR_REQ_RES_STR-REQUESTEDVARIABLE sy-vline 
WA_LCM_VAR_REQ_RES_STR-VARIABLERESPONSE sy-vline 
WA_LCM_VAR_REQ_RES_STR-LGLCNTNTMCREATEDUTCDATETIME sy-vline 
WA_LCM_VAR_REQ_RES_STR-DOCUMENTVERSION sy-vline 
WA_LCM_VAR_REQ_RES_STR-LEGALDOCUMENTVERSION sy-vline 
WA_LCM_VAR_REQ_RES_STR-ORDERID sy-vline 
WA_LCM_VAR_REQ_RES_STR-STATUS sy-vline 
WA_LCM_VAR_REQ_RES_STR-PREVVARIABLEREQGROUPKEY sy-vline 
WA_LCM_VAR_REQ_RES_STR-LOGCREATEDUTCDATETIME sy-vline 
WA_LCM_VAR_REQ_RES_STR-REQUESTTYPE sy-vline 
WA_LCM_VAR_REQ_RES_STR-ACTIONTYPE sy-vline 
WA_LCM_VAR_REQ_RES_STR-TOTALPACKET sy-vline      INTO ld_text SEPARATED BY SPACE.

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