ABAP Select data from SAP table ISRSHMAINTSCHEDACTIVITYLOGTP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISRSHMAINTSCHEDACTIVITYLOGTP
*  INTO TABLE @DATA(IT_ISRSHMAINTSCHEDACTIVITYLOGTP2).
*--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_ISRSHMAINTSCHEDACTIVITYLOGTP INDEX 1 INTO DATA(WA_ISRSHMAINTSCHEDACTIVITYLOGTP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISRSHMAINTSCHEDACTIVITYLOGTP>-KEY = 1.
<ISRSHMAINTSCHEDACTIVITYLOGTP>-PARENT_KEY = 1.
<ISRSHMAINTSCHEDACTIVITYLOGTP>-ROOT_KEY = 1.
<ISRSHMAINTSCHEDACTIVITYLOGTP>-MAINTSCHEDSIMLNOPERATIONUUID = 1.
<ISRSHMAINTSCHEDACTIVITYLOGTP>-REPLYTOACTIVITYLOGUUID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISRSHMAINTSCHEDACTIVITYLOGTP-MAINTSCHEDACTIVITYLOGCHANNEL, sy-vline,
  WA_ISRSHMAINTSCHEDACTIVITYLOGTP-MAINTSCHEDACTIVITYLOGTYPE, sy-vline,
  WA_ISRSHMAINTSCHEDACTIVITYLOGTP-STATUS, sy-vline,
  WA_ISRSHMAINTSCHEDACTIVITYLOGTP-MAINTSCHEDACTIVITYLOGTEXT, sy-vline,
  WA_ISRSHMAINTSCHEDACTIVITYLOGTP-SYSTEMMESSAGEIDENTIFICATION, sy-vline,
  WA_ISRSHMAINTSCHEDACTIVITYLOGTP-SYSTEMMESSAGENUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISRSHMAINTSCHEDACTIVITYLOGTP 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_ISRSHMAINTSCHEDACTIVITYLOGTP 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_ISRSHMAINTSCHEDACTIVITYLOGTP INTO WA_ISRSHMAINTSCHEDACTIVITYLOGTP.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ISRSHMAINTSCHEDACTIVITYLOGTP_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
MAINTSCHEDSIMLNOPERATIONUUID TYPE STRING,
REPLYTOACTIVITYLOGUUID TYPE STRING,
MAINTSCHEDACTIVITYLOGCHANNEL TYPE STRING,
MAINTSCHEDACTIVITYLOGTYPE TYPE STRING,
STATUS TYPE STRING,
MAINTSCHEDACTIVITYLOGTEXT TYPE STRING,
SYSTEMMESSAGEIDENTIFICATION TYPE STRING,
SYSTEMMESSAGENUMBER TYPE STRING,
SYSTEMMESSAGEVARIABLE1 TYPE STRING,
SYSTEMMESSAGEVARIABLE2 TYPE STRING,
SYSTEMMESSAGEVARIABLE3 TYPE STRING,
SYSTEMMESSAGEVARIABLE4 TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISRSHMAINTSCHEDACTIVITYLOGTP_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_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-KEY sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-PARENT_KEY sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-ROOT_KEY sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-MAINTSCHEDSIMLNOPERATIONUUID sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-REPLYTOACTIVITYLOGUUID sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-MAINTSCHEDACTIVITYLOGCHANNEL sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-MAINTSCHEDACTIVITYLOGTYPE sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-STATUS sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-MAINTSCHEDACTIVITYLOGTEXT sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-SYSTEMMESSAGEIDENTIFICATION sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-SYSTEMMESSAGENUMBER sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-SYSTEMMESSAGEVARIABLE1 sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-SYSTEMMESSAGEVARIABLE2 sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-SYSTEMMESSAGEVARIABLE3 sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-SYSTEMMESSAGEVARIABLE4 sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-CREATEDBYUSER sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-CREATIONDATETIME sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-LASTCHANGEDBYUSER sy-vline 
WA_ISRSHMAINTSCHEDACTIVITYLOGTP_STR-LASTCHANGEDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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