ABAP Select data from SAP table ISRVCENTRSHT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ISRVCENTRSHT
*  INTO TABLE @DATA(IT_ISRVCENTRSHT2).
*--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_ISRVCENTRSHT INDEX 1 INTO DATA(WA_ISRVCENTRSHT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ISRVCENTRSHT>-MANDT = 1.
<ISRVCENTRSHT>-SERVICEENTRYSHEET = 1.
<ISRVCENTRSHT>-SERVICEENTRYSHEETNAME = 1.
<ISRVCENTRSHT>-SUPPLIER = 1.
<ISRVCENTRSHT>-SUPPLIERNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ISRVCENTRSHT-PURCHASEORDER, sy-vline,
  WA_ISRVCENTRSHT-PURCHASEORDERCURRENCY, sy-vline,
  WA_ISRVCENTRSHT-ISDELETED, sy-vline,
  WA_ISRVCENTRSHT-APPROVALSTATUS, sy-vline,
  WA_ISRVCENTRSHT-APPROVALDATETIME, sy-vline,
  WA_ISRVCENTRSHT-RESPONSIBLEPERSON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ISRVCENTRSHT 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_ISRVCENTRSHT 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_ISRVCENTRSHT INTO WA_ISRVCENTRSHT.


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

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

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

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

*Conversion exit GJAHR, internal->external for field MATERIALDOCUMENTYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ISRVCENTRSHT-MATERIALDOCUMENTYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ISRVCENTRSHT-MATERIALDOCUMENTYEAR.
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_ISRVCENTRSHT_STR, 
MANDT TYPE STRING,
SERVICEENTRYSHEET TYPE STRING,
SERVICEENTRYSHEETNAME TYPE STRING,
SUPPLIER TYPE STRING,
SUPPLIERNAME TYPE STRING,
PURCHASEORDER TYPE STRING,
PURCHASEORDERCURRENCY TYPE STRING,
ISDELETED TYPE STRING,
APPROVALSTATUS TYPE STRING,
APPROVALDATETIME TYPE STRING,
RESPONSIBLEPERSON TYPE STRING,
ORIGINOBJECTTYPE TYPE STRING,
CURRENCY TYPE STRING,
MATERIALDOCUMENT TYPE STRING,
MATERIALDOCUMENTYEAR TYPE STRING,
CREATIONDATETIME TYPE STRING,
CREATEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEUSER TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
PURGDOCEXTERNALSYSTEM TYPE STRING,
PURGDOCEXTERNALREFERENCE TYPE STRING,
EXTERNALREVISIONDATETIME TYPE STRING,
POSTINGDATE TYPE STRING,
PRICINGDOCUMENT TYPE STRING,
TOTALNETAMOUNT TYPE STRING,
TOTALSESNETAMOUNTINCLSALESTAX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ISRVCENTRSHT_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_ISRVCENTRSHT_STR-MANDT sy-vline 
WA_ISRVCENTRSHT_STR-SERVICEENTRYSHEET sy-vline 
WA_ISRVCENTRSHT_STR-SERVICEENTRYSHEETNAME sy-vline 
WA_ISRVCENTRSHT_STR-SUPPLIER sy-vline 
WA_ISRVCENTRSHT_STR-SUPPLIERNAME sy-vline 
WA_ISRVCENTRSHT_STR-PURCHASEORDER sy-vline 
WA_ISRVCENTRSHT_STR-PURCHASEORDERCURRENCY sy-vline 
WA_ISRVCENTRSHT_STR-ISDELETED sy-vline 
WA_ISRVCENTRSHT_STR-APPROVALSTATUS sy-vline 
WA_ISRVCENTRSHT_STR-APPROVALDATETIME sy-vline 
WA_ISRVCENTRSHT_STR-RESPONSIBLEPERSON sy-vline 
WA_ISRVCENTRSHT_STR-ORIGINOBJECTTYPE sy-vline 
WA_ISRVCENTRSHT_STR-CURRENCY sy-vline 
WA_ISRVCENTRSHT_STR-MATERIALDOCUMENT sy-vline 
WA_ISRVCENTRSHT_STR-MATERIALDOCUMENTYEAR sy-vline 
WA_ISRVCENTRSHT_STR-CREATIONDATETIME sy-vline 
WA_ISRVCENTRSHT_STR-CREATEDBYUSER sy-vline 
WA_ISRVCENTRSHT_STR-LASTCHANGEDATETIME sy-vline 
WA_ISRVCENTRSHT_STR-LASTCHANGEUSER sy-vline 
WA_ISRVCENTRSHT_STR-PURCHASINGORGANIZATION sy-vline 
WA_ISRVCENTRSHT_STR-PURCHASINGGROUP sy-vline 
WA_ISRVCENTRSHT_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_ISRVCENTRSHT_STR-PURGDOCEXTERNALSYSTEM sy-vline 
WA_ISRVCENTRSHT_STR-PURGDOCEXTERNALREFERENCE sy-vline 
WA_ISRVCENTRSHT_STR-EXTERNALREVISIONDATETIME sy-vline 
WA_ISRVCENTRSHT_STR-POSTINGDATE sy-vline 
WA_ISRVCENTRSHT_STR-PRICINGDOCUMENT sy-vline 
WA_ISRVCENTRSHT_STR-TOTALNETAMOUNT sy-vline 
WA_ISRVCENTRSHT_STR-TOTALSESNETAMOUNTINCLSALESTAX sy-vline      INTO ld_text SEPARATED BY SPACE.

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