ABAP Select data from SAP table IMAINTNOTIF into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IMAINTNOTIF 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 IMAINTNOTIF. 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 IMAINTNOTIF 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_IMAINTNOTIF TYPE STANDARD TABLE OF IMAINTNOTIF,
      WA_IMAINTNOTIF TYPE IMAINTNOTIF,
      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: <IMAINTNOTIF> TYPE IMAINTNOTIF.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IMAINTNOTIF
*  INTO TABLE @DATA(IT_IMAINTNOTIF2).
*--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_IMAINTNOTIF INDEX 1 INTO DATA(WA_IMAINTNOTIF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IMAINTNOTIF>-MANDT = 1.
<IMAINTNOTIF>-MAINTENANCENOTIFICATION = 1.
<IMAINTNOTIF>-MAINTPRIORITY = 1.
<IMAINTNOTIF>-MAINTPRIORITYTYPE = 1.
<IMAINTNOTIF>-NOTIFICATIONTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IMAINTNOTIF-NOTIFPROCESSINGPHASE, sy-vline,
  WA_IMAINTNOTIF-CREATEDBYUSER, sy-vline,
  WA_IMAINTNOTIF-LASTCHANGEDBYUSER, sy-vline,
  WA_IMAINTNOTIF-REPORTEDBYUSER, sy-vline,
  WA_IMAINTNOTIF-CREATIONDATE, sy-vline,
  WA_IMAINTNOTIF-LASTCHANGETIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IMAINTNOTIF 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_IMAINTNOTIF 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_IMAINTNOTIF INTO WA_IMAINTNOTIF.


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

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

*Conversion exit GERNR, internal->external for field SERIALNUMBER
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTNOTIF-SERIALNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTNOTIF-SERIALNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTNOTIF-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTNOTIF-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field MASTERLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_IMAINTNOTIF-MASTERLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IMAINTNOTIF-MASTERLANGUAGE.
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_IMAINTNOTIF_STR, 
MANDT TYPE STRING,
MAINTENANCENOTIFICATION TYPE STRING,
MAINTPRIORITY TYPE STRING,
MAINTPRIORITYTYPE TYPE STRING,
NOTIFICATIONTYPE TYPE STRING,
NOTIFPROCESSINGPHASE TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
REPORTEDBYUSER TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGETIME TYPE STRING,
LASTCHANGEDATE TYPE STRING,
CREATIONTIME TYPE STRING,
CREATIONDATETIME TYPE STRING,
NOTIFICATIONTEXT TYPE STRING,
LONGTEXTLANGUAGE TYPE STRING,
MAINTENANCEORDER TYPE STRING,
REQUIREDSTARTDATE TYPE STRING,
REQUIREDSTARTTIME TYPE STRING,
REQUIREDENDDATE TYPE STRING,
REQUIREDENDTIME TYPE STRING,
NOTIFICATIONCREATIONDATE TYPE STRING,
NOTIFICATIONCREATIONTIME TYPE STRING,
NOTIFICATIONREFERENCEDATE TYPE STRING,
NOTIFICATIONHASLONGTEXT TYPE STRING,
MAINTNOTIFINTERNALID TYPE STRING,
NOTIFICATIONTIMEZONE TYPE STRING,
NOTIFICATIONREFERENCETIME TYPE STRING,
NOTIFICATIONCOMPLETIONDATE TYPE STRING,
NOTIFICATIONCOMPLETIONTIME TYPE STRING,
WORKCENTERINTERNALID TYPE STRING,
WORKCENTERTYPECODE TYPE STRING,
MAINTENANCEWORKCENTERPLANT TYPE STRING,
MAINTNOTIFICATIONCATALOG TYPE STRING,
MAINTNOTIFICATIONCODE TYPE STRING,
MAINTNOTIFICATIONCODEGROUP TYPE STRING,
CATALOGPROFILE TYPE STRING,
NOTIFICATIONORIGIN TYPE STRING,
ISDELETED TYPE STRING,
ISCOMPLETED TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
SERIALNUMBER TYPE STRING,
MATERIAL TYPE STRING,
ADDITIONALDEVICEDATA TYPE STRING,
MAINTNOTIFEXTREFERENCENUMBER TYPE STRING,
MASTERLANGUAGE TYPE STRING,
DFSMAINTNOTIFICATIONOBJECTNMBR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IMAINTNOTIF_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_IMAINTNOTIF_STR-MANDT sy-vline 
WA_IMAINTNOTIF_STR-MAINTENANCENOTIFICATION sy-vline 
WA_IMAINTNOTIF_STR-MAINTPRIORITY sy-vline 
WA_IMAINTNOTIF_STR-MAINTPRIORITYTYPE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONTYPE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFPROCESSINGPHASE sy-vline 
WA_IMAINTNOTIF_STR-CREATEDBYUSER sy-vline 
WA_IMAINTNOTIF_STR-LASTCHANGEDBYUSER sy-vline 
WA_IMAINTNOTIF_STR-REPORTEDBYUSER sy-vline 
WA_IMAINTNOTIF_STR-CREATIONDATE sy-vline 
WA_IMAINTNOTIF_STR-LASTCHANGETIME sy-vline 
WA_IMAINTNOTIF_STR-LASTCHANGEDATE sy-vline 
WA_IMAINTNOTIF_STR-CREATIONTIME sy-vline 
WA_IMAINTNOTIF_STR-CREATIONDATETIME sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONTEXT sy-vline 
WA_IMAINTNOTIF_STR-LONGTEXTLANGUAGE sy-vline 
WA_IMAINTNOTIF_STR-MAINTENANCEORDER sy-vline 
WA_IMAINTNOTIF_STR-REQUIREDSTARTDATE sy-vline 
WA_IMAINTNOTIF_STR-REQUIREDSTARTTIME sy-vline 
WA_IMAINTNOTIF_STR-REQUIREDENDDATE sy-vline 
WA_IMAINTNOTIF_STR-REQUIREDENDTIME sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONCREATIONDATE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONCREATIONTIME sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONREFERENCEDATE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONHASLONGTEXT sy-vline 
WA_IMAINTNOTIF_STR-MAINTNOTIFINTERNALID sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONTIMEZONE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONREFERENCETIME sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONCOMPLETIONDATE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONCOMPLETIONTIME sy-vline 
WA_IMAINTNOTIF_STR-WORKCENTERINTERNALID sy-vline 
WA_IMAINTNOTIF_STR-WORKCENTERTYPECODE sy-vline 
WA_IMAINTNOTIF_STR-MAINTENANCEWORKCENTERPLANT sy-vline 
WA_IMAINTNOTIF_STR-MAINTNOTIFICATIONCATALOG sy-vline 
WA_IMAINTNOTIF_STR-MAINTNOTIFICATIONCODE sy-vline 
WA_IMAINTNOTIF_STR-MAINTNOTIFICATIONCODEGROUP sy-vline 
WA_IMAINTNOTIF_STR-CATALOGPROFILE sy-vline 
WA_IMAINTNOTIF_STR-NOTIFICATIONORIGIN sy-vline 
WA_IMAINTNOTIF_STR-ISDELETED sy-vline 
WA_IMAINTNOTIF_STR-ISCOMPLETED sy-vline 
WA_IMAINTNOTIF_STR-LASTCHANGEDATETIME sy-vline 
WA_IMAINTNOTIF_STR-SERIALNUMBER sy-vline 
WA_IMAINTNOTIF_STR-MATERIAL sy-vline 
WA_IMAINTNOTIF_STR-ADDITIONALDEVICEDATA sy-vline 
WA_IMAINTNOTIF_STR-MAINTNOTIFEXTREFERENCENUMBER sy-vline 
WA_IMAINTNOTIF_STR-MASTERLANGUAGE sy-vline 
WA_IMAINTNOTIF_STR-DFSMAINTNOTIFICATIONOBJECTNMBR sy-vline      INTO ld_text SEPARATED BY SPACE.

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