ABAP Select data from SAP table RELMC_LM_SETTINGS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELMC_LM_SETTINGS
*  INTO TABLE @DATA(IT_RELMC_LM_SETTINGS2).
*--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_RELMC_LM_SETTINGS INDEX 1 INTO DATA(WA_RELMC_LM_SETTINGS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELMC_LM_SETTINGS>-MANDT = 1.
<RELMC_LM_SETTINGS>-DUMMYKEY = 1.
<RELMC_LM_SETTINGS>-LRDEFAULTAREA = 1.
<RELMC_LM_SETTINGS>-LRDEFAULTCURR = 1.
<RELMC_LM_SETTINGS>-PLDEFAULTAREA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELMC_LM_SETTINGS-PLDEFAULTLENGTH, sy-vline,
  WA_RELMC_LM_SETTINGS-PLDEFAULTTIME, sy-vline,
  WA_RELMC_LM_SETTINGS-PLDEFAULTLOCSYS, sy-vline,
  WA_RELMC_LM_SETTINGS-PLCADASTRALMEAS, sy-vline,
  WA_RELMC_LM_SETTINGS-PLCONTRACTMEAS, sy-vline,
  WA_RELMC_LM_SETTINGS-PLSLLOCSYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELMC_LM_SETTINGS 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_RELMC_LM_SETTINGS 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_RELMC_LM_SETTINGS INTO WA_RELMC_LM_SETTINGS.


*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 CUNIT, internal->external for field LRDEFAULTAREA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELMC_LM_SETTINGS-LRDEFAULTAREA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELMC_LM_SETTINGS-LRDEFAULTAREA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PLDEFAULTAREA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELMC_LM_SETTINGS-PLDEFAULTAREA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELMC_LM_SETTINGS-PLDEFAULTAREA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PLDEFAULTLENGTH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELMC_LM_SETTINGS-PLDEFAULTLENGTH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELMC_LM_SETTINGS-PLDEFAULTLENGTH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PLDEFAULTTIME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELMC_LM_SETTINGS-PLDEFAULTTIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELMC_LM_SETTINGS-PLDEFAULTTIME.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field NADEFAULTAREA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELMC_LM_SETTINGS-NADEFAULTAREA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELMC_LM_SETTINGS-NADEFAULTAREA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RCDEFAULTAREA
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELMC_LM_SETTINGS-RCDEFAULTAREA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELMC_LM_SETTINGS-RCDEFAULTAREA.
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_RELMC_LM_SETTINGS_STR, 
MANDT TYPE STRING,
DUMMYKEY TYPE STRING,
LRDEFAULTAREA TYPE STRING,
LRDEFAULTCURR TYPE STRING,
PLDEFAULTAREA TYPE STRING,
PLDEFAULTLENGTH TYPE STRING,
PLDEFAULTTIME TYPE STRING,
PLDEFAULTLOCSYS TYPE STRING,
PLCADASTRALMEAS TYPE STRING,
PLCONTRACTMEAS TYPE STRING,
PLSLLOCSYS TYPE STRING,
PLSLLOCLEVEL TYPE STRING,
PLSLCUSAGETYPE TYPE STRING,
PLUSESIMPLEPLNO TYPE STRING,
NADEFAULTAREA TYPE STRING,
NADEFAULTCURR TYPE STRING,
RCDEFAULTAREA TYPE STRING,
PECSVARNR TYPE STRING,
PENHVARNR TYPE STRING,
PEPSVARNR TYPE STRING,
PEDPVARNR TYPE STRING,
PEERVARNR TYPE STRING,
PEDPDEFLOCSYS TYPE STRING,
PEERDEFLOCSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELMC_LM_SETTINGS_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_RELMC_LM_SETTINGS_STR-MANDT sy-vline 
WA_RELMC_LM_SETTINGS_STR-DUMMYKEY sy-vline 
WA_RELMC_LM_SETTINGS_STR-LRDEFAULTAREA sy-vline 
WA_RELMC_LM_SETTINGS_STR-LRDEFAULTCURR sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLDEFAULTAREA sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLDEFAULTLENGTH sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLDEFAULTTIME sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLDEFAULTLOCSYS sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLCADASTRALMEAS sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLCONTRACTMEAS sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLSLLOCSYS sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLSLLOCLEVEL sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLSLCUSAGETYPE sy-vline 
WA_RELMC_LM_SETTINGS_STR-PLUSESIMPLEPLNO sy-vline 
WA_RELMC_LM_SETTINGS_STR-NADEFAULTAREA sy-vline 
WA_RELMC_LM_SETTINGS_STR-NADEFAULTCURR sy-vline 
WA_RELMC_LM_SETTINGS_STR-RCDEFAULTAREA sy-vline 
WA_RELMC_LM_SETTINGS_STR-PECSVARNR sy-vline 
WA_RELMC_LM_SETTINGS_STR-PENHVARNR sy-vline 
WA_RELMC_LM_SETTINGS_STR-PEPSVARNR sy-vline 
WA_RELMC_LM_SETTINGS_STR-PEDPVARNR sy-vline 
WA_RELMC_LM_SETTINGS_STR-PEERVARNR sy-vline 
WA_RELMC_LM_SETTINGS_STR-PEDPDEFLOCSYS sy-vline 
WA_RELMC_LM_SETTINGS_STR-PEERDEFLOCSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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