ABAP Select data from SAP table ISMAINTENANCEPLANTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISMAINTENANCEPLANTP
*  INTO TABLE @DATA(IT_ISMAINTENANCEPLANTP2).
*--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_ISMAINTENANCEPLANTP INDEX 1 INTO DATA(WA_ISMAINTENANCEPLANTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISMAINTENANCEPLANTP>-KEY = 1.
<ISMAINTENANCEPLANTP>-PARENT_KEY = 1.
<ISMAINTENANCEPLANTP>-ROOT_KEY = 1.
<ISMAINTENANCEPLANTP>-MAINTENANCEPLAN = 1.
<ISMAINTENANCEPLANTP>-MAINTENANCEPLANDESC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISMAINTENANCEPLANTP-CREATIONDATE, sy-vline,
  WA_ISMAINTENANCEPLANTP-CREATEDBYUSER, sy-vline,
  WA_ISMAINTENANCEPLANTP-LASTCHANGEDATE, sy-vline,
  WA_ISMAINTENANCEPLANTP-LASTCHANGEDBYUSER, sy-vline,
  WA_ISMAINTENANCEPLANTP-MAINTENANCESTRATEGY, sy-vline,
  WA_ISMAINTENANCEPLANTP-SCHEDULINGDURATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISMAINTENANCEPLANTP 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_ISMAINTENANCEPLANTP 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_ISMAINTENANCEPLANTP INTO WA_ISMAINTENANCEPLANTP.


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

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

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

*Conversion exit TPLNR, internal->external for field FUNCTIONALLOCATION
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_ISMAINTENANCEPLANTP-FUNCTIONALLOCATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAINTENANCEPLANTP-FUNCTIONALLOCATION.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ISMAINTENANCEPLANTP-LANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAINTENANCEPLANTP-LANGUAGE.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EARLYCOMPLETIONTOLERANCEPCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISMAINTENANCEPLANTP-EARLYCOMPLETIONTOLERANCEPCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISMAINTENANCEPLANTP-EARLYCOMPLETIONTOLERANCEPCT.
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_ISMAINTENANCEPLANTP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
MAINTENANCEPLAN TYPE STRING,
MAINTENANCEPLANDESC TYPE STRING,
CREATIONDATE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
MAINTENANCESTRATEGY TYPE STRING,
SCHEDULINGDURATION TYPE STRING,
SCHEDULINGDURATIONUNIT TYPE STRING,
EQUIPMENT TYPE STRING,
FUNCTIONALLOCATION TYPE STRING,
CUSTOMER TYPE STRING,
NUMBEROFMAINTENANCEITEMS TYPE STRING,
LANGUAGE TYPE STRING,
CYCLEMODIFICATIONRATIO TYPE STRING,
MAINTPLANSCHEDGINDICATOR TYPE STRING,
CALLHORIZONPERCENT TYPE STRING,
CALLHORIZONINDAYS TYPE STRING,
CALLHORIZONVALUE TYPE STRING,
MAINTENANCECALLHORIZONCALCTYPE TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
MAINTENANCEPLANINTERNALID TYPE STRING,
MAINTENANCECALL TYPE STRING,
MAINTENANCEPLANCATEGORY TYPE STRING,
MAINTPLANFREEDEFINEDATTRIB TYPE STRING,
BASICSTARTDATE TYPE STRING,
SCHEDULINGSTARTDATE TYPE STRING,
SCHEDULINGSTARTTIME TYPE STRING,
MAINTSCHEDULINGSTARTCOUNTER TYPE STRING,
MAINTPLANSTARTBUFFERQUANTITY TYPE STRING,
MAINTPLANSTARTBUFFERUNIT TYPE STRING,
FACTORYCALENDAR TYPE STRING,
LATECOMPLETIONSHIFTFACTOR TYPE STRING,
LATECOMPLETIONTOLERANCEPERCENT TYPE STRING,
EARLYCOMPLETIONSHIFTFACTOR TYPE STRING,
EARLYCOMPLETIONTOLERANCEPCT TYPE STRING,
PRDCSSRCALLOBJCOMPLTNISRQD TYPE STRING,
LOGICALOPERATOR TYPE STRING,
MAINTPLANISLOCKEDAGAINSTCALLS TYPE STRING,
SCHEDULINGENDDATE TYPE STRING,
MAINTSCHEDULINGENDCOUNTER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISMAINTENANCEPLANTP_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_ISMAINTENANCEPLANTP_STR-KEY sy-vline 
WA_ISMAINTENANCEPLANTP_STR-PARENT_KEY sy-vline 
WA_ISMAINTENANCEPLANTP_STR-ROOT_KEY sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCEPLAN sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCEPLANDESC sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CREATIONDATE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CREATEDBYUSER sy-vline 
WA_ISMAINTENANCEPLANTP_STR-LASTCHANGEDATE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-LASTCHANGEDBYUSER sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCESTRATEGY sy-vline 
WA_ISMAINTENANCEPLANTP_STR-SCHEDULINGDURATION sy-vline 
WA_ISMAINTENANCEPLANTP_STR-SCHEDULINGDURATIONUNIT sy-vline 
WA_ISMAINTENANCEPLANTP_STR-EQUIPMENT sy-vline 
WA_ISMAINTENANCEPLANTP_STR-FUNCTIONALLOCATION sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CUSTOMER sy-vline 
WA_ISMAINTENANCEPLANTP_STR-NUMBEROFMAINTENANCEITEMS sy-vline 
WA_ISMAINTENANCEPLANTP_STR-LANGUAGE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CYCLEMODIFICATIONRATIO sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTPLANSCHEDGINDICATOR sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CALLHORIZONPERCENT sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CALLHORIZONINDAYS sy-vline 
WA_ISMAINTENANCEPLANTP_STR-CALLHORIZONVALUE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCECALLHORIZONCALCTYPE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-AUTHORIZATIONGROUP sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCEPLANINTERNALID sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCECALL sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTENANCEPLANCATEGORY sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTPLANFREEDEFINEDATTRIB sy-vline 
WA_ISMAINTENANCEPLANTP_STR-BASICSTARTDATE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-SCHEDULINGSTARTDATE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-SCHEDULINGSTARTTIME sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTSCHEDULINGSTARTCOUNTER sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTPLANSTARTBUFFERQUANTITY sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTPLANSTARTBUFFERUNIT sy-vline 
WA_ISMAINTENANCEPLANTP_STR-FACTORYCALENDAR sy-vline 
WA_ISMAINTENANCEPLANTP_STR-LATECOMPLETIONSHIFTFACTOR sy-vline 
WA_ISMAINTENANCEPLANTP_STR-LATECOMPLETIONTOLERANCEPERCENT sy-vline 
WA_ISMAINTENANCEPLANTP_STR-EARLYCOMPLETIONSHIFTFACTOR sy-vline 
WA_ISMAINTENANCEPLANTP_STR-EARLYCOMPLETIONTOLERANCEPCT sy-vline 
WA_ISMAINTENANCEPLANTP_STR-PRDCSSRCALLOBJCOMPLTNISRQD sy-vline 
WA_ISMAINTENANCEPLANTP_STR-LOGICALOPERATOR sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTPLANISLOCKEDAGAINSTCALLS sy-vline 
WA_ISMAINTENANCEPLANTP_STR-SCHEDULINGENDDATE sy-vline 
WA_ISMAINTENANCEPLANTP_STR-MAINTSCHEDULINGENDCOUNTER sy-vline      INTO ld_text SEPARATED BY SPACE.

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