ABAP Select data from SAP table ISU_ROBJ_HISTDETAIL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISU_ROBJ_HISTDETAIL
*  INTO TABLE @DATA(IT_ISU_ROBJ_HISTDETAIL2).
*--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_ISU_ROBJ_HISTDETAIL INDEX 1 INTO DATA(WA_ISU_ROBJ_HISTDETAIL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISU_ROBJ_HISTDETAIL>-OBJNR = 1.
<ISU_ROBJ_HISTDETAIL>-ROUTE = 1.
<ISU_ROBJ_HISTDETAIL>-STATUS_SERV = 1.
<ISU_ROBJ_HISTDETAIL>-STATUS_CUST = 1.
<ISU_ROBJ_HISTDETAIL>-WEEKLY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISU_ROBJ_HISTDETAIL-MONTHLY, sy-vline,
  WA_ISU_ROBJ_HISTDETAIL-MONTH_COUNT, sy-vline,
  WA_ISU_ROBJ_HISTDETAIL-DATECHANGE, sy-vline,
  WA_ISU_ROBJ_HISTDETAIL-CHANGEABLE, sy-vline,
  WA_ISU_ROBJ_HISTDETAIL-FLAG1, sy-vline,
  WA_ISU_ROBJ_HISTDETAIL-FLAG2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISU_ROBJ_HISTDETAIL 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_ISU_ROBJ_HISTDETAIL 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_ISU_ROBJ_HISTDETAIL INTO WA_ISU_ROBJ_HISTDETAIL.


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

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

*Conversion exit ALPHA, internal->external for field ROUTE_SEQUENCE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ISU_ROBJ_HISTDETAIL-ROUTE_SEQUENCE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISU_ROBJ_HISTDETAIL-ROUTE_SEQUENCE.
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_ISU_ROBJ_HISTDETAIL_STR, 
OBJNR TYPE STRING,
ROUTE TYPE STRING,
STATUS_SERV TYPE STRING,
STATUS_CUST TYPE STRING,
WEEKLY TYPE STRING,
MONTHLY TYPE STRING,
MONTH_COUNT TYPE STRING,
DATECHANGE TYPE STRING,
CHANGEABLE TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
FLAG5 TYPE STRING,
FLAG6 TYPE STRING,
FLAG7 TYPE STRING,
DAY_FLAG TYPE STRING,
DAY_TYPE TYPE STRING,
WEEK_FLAG TYPE STRING,
MNTH_FLAG TYPE STRING,
DAY_TXT TYPE STRING,
ROUTE_SEQUENCE TYPE STRING,
SFREPLACE TYPE STRING,
SERVICE_TYPE TYPE STRING,
WASTE_FLAG TYPE STRING,
DAY_FREQUENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISU_ROBJ_HISTDETAIL_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_ISU_ROBJ_HISTDETAIL_STR-OBJNR sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-ROUTE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-STATUS_SERV sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-STATUS_CUST sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-WEEKLY sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-MONTHLY sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-MONTH_COUNT sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-DATECHANGE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-CHANGEABLE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG1 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG2 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG3 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG4 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG5 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG6 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-FLAG7 sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-DAY_FLAG sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-DAY_TYPE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-WEEK_FLAG sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-MNTH_FLAG sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-DAY_TXT sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-ROUTE_SEQUENCE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-SFREPLACE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-SERVICE_TYPE sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-WASTE_FLAG sy-vline 
WA_ISU_ROBJ_HISTDETAIL_STR-DAY_FREQUENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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