ABAP Select data from SAP table RMAINTPLNGBKTTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RMAINTPLNGBKTTP
*  INTO TABLE @DATA(IT_RMAINTPLNGBKTTP2).
*--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_RMAINTPLNGBKTTP INDEX 1 INTO DATA(WA_RMAINTPLNGBKTTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RMAINTPLNGBKTTP>-MANDT = 1.
<RMAINTPLNGBKTTP>-MAINTPLANNINGBUCKETUUID = 1.
<RMAINTPLNGBKTTP>-MAINTPLANNINGBUCKETTYPE = 1.
<RMAINTPLNGBKTTP>-MAINTENANCEPLANNINGPLANT = 1.
<RMAINTPLNGBKTTP>-MAINTPLNGBUCKETLABEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RMAINTPLNGBKTTP-MAINTPLANNINGBUCKETDESCRIPTION, sy-vline,
  WA_RMAINTPLNGBKTTP-REFMAINTPLANNINGBUCKET, sy-vline,
  WA_RMAINTPLNGBKTTP-MAINTPLNGBUCKETLABELPATTERN, sy-vline,
  WA_RMAINTPLNGBKTTP-MAINTPLNGBUCKETRECURRENCETYPE, sy-vline,
  WA_RMAINTPLNGBKTTP-NROFMAINTPLNGBUCKETSINADVANCE, sy-vline,
  WA_RMAINTPLNGBKTTP-MAINTPLNGBUCKETSTARTDATETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RMAINTPLNGBKTTP 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_RMAINTPLNGBKTTP 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_RMAINTPLNGBKTTP INTO WA_RMAINTPLNGBKTTP.


*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 MAINTPLNGBUCKETDURATIONUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RMAINTPLNGBKTTP-MAINTPLNGBUCKETDURATIONUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RMAINTPLNGBKTTP-MAINTPLNGBUCKETDURATIONUNIT.
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_RMAINTPLNGBKTTP_STR, 
MANDT TYPE STRING,
MAINTPLANNINGBUCKETUUID TYPE STRING,
MAINTPLANNINGBUCKETTYPE TYPE STRING,
MAINTENANCEPLANNINGPLANT TYPE STRING,
MAINTPLNGBUCKETLABEL TYPE STRING,
MAINTPLANNINGBUCKETDESCRIPTION TYPE STRING,
REFMAINTPLANNINGBUCKET TYPE STRING,
MAINTPLNGBUCKETLABELPATTERN TYPE STRING,
MAINTPLNGBUCKETRECURRENCETYPE TYPE STRING,
NROFMAINTPLNGBUCKETSINADVANCE TYPE STRING,
MAINTPLNGBUCKETSTARTDATETIME TYPE STRING,
MAINTPLNGBUCKETDURATION TYPE STRING,
MAINTPLNGBUCKETDURATIONUNIT TYPE STRING,
MAINTPLNGBUCKETENDDATETIME TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
MAINTPLNGBUCKETGENERATIONDATE TYPE STRING,
MAINTPLNGBCKTRCRRCINTERVAL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RMAINTPLNGBKTTP_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_RMAINTPLNGBKTTP_STR-MANDT sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLANNINGBUCKETUUID sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLANNINGBUCKETTYPE sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTENANCEPLANNINGPLANT sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETLABEL sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLANNINGBUCKETDESCRIPTION sy-vline 
WA_RMAINTPLNGBKTTP_STR-REFMAINTPLANNINGBUCKET sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETLABELPATTERN sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETRECURRENCETYPE sy-vline 
WA_RMAINTPLNGBKTTP_STR-NROFMAINTPLNGBUCKETSINADVANCE sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETSTARTDATETIME sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETDURATION sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETDURATIONUNIT sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETENDDATETIME sy-vline 
WA_RMAINTPLNGBKTTP_STR-LASTCHANGEDATETIME sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBUCKETGENERATIONDATE sy-vline 
WA_RMAINTPLNGBKTTP_STR-MAINTPLNGBCKTRCRRCINTERVAL sy-vline      INTO ld_text SEPARATED BY SPACE.

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