ABAP Select data from SAP table ASRVCENTRSHT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ASRVCENTRSHT
*  INTO TABLE @DATA(IT_ASRVCENTRSHT2).
*--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_ASRVCENTRSHT INDEX 1 INTO DATA(WA_ASRVCENTRSHT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ASRVCENTRSHT>-MANDT = 1.
<ASRVCENTRSHT>-SERVICEENTRYSHEET = 1.
<ASRVCENTRSHT>-APPROVALDATETIME = 1.
<ASRVCENTRSHT>-APPROVALSTATUS = 1.
<ASRVCENTRSHT>-CREATEDBYUSER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ASRVCENTRSHT-CREATIONDATETIME, sy-vline,
  WA_ASRVCENTRSHT-PURCHASINGORGANIZATION, sy-vline,
  WA_ASRVCENTRSHT-PURCHASINGGROUP, sy-vline,
  WA_ASRVCENTRSHT-ISENDOFPURPOSEBLOCKED, sy-vline,
  WA_ASRVCENTRSHT-CURRENCY, sy-vline,
  WA_ASRVCENTRSHT-ISDELETED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ASRVCENTRSHT 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_ASRVCENTRSHT 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_ASRVCENTRSHT INTO WA_ASRVCENTRSHT.


*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_ASRVCENTRSHT-SERVICEENTRYSHEET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASRVCENTRSHT-SERVICEENTRYSHEET.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit GJAHR, internal->external for field MATERIALDOCUMENTYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ASRVCENTRSHT-MATERIALDOCUMENTYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASRVCENTRSHT-MATERIALDOCUMENTYEAR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field SUPPLIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ASRVCENTRSHT-SUPPLIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ASRVCENTRSHT-SUPPLIER.
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_ASRVCENTRSHT_STR, 
MANDT TYPE STRING,
SERVICEENTRYSHEET TYPE STRING,
APPROVALDATETIME TYPE STRING,
APPROVALSTATUS TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
PURCHASINGGROUP TYPE STRING,
ISENDOFPURPOSEBLOCKED TYPE STRING,
CURRENCY TYPE STRING,
ISDELETED TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
MATERIALDOCUMENT TYPE STRING,
MATERIALDOCUMENTYEAR TYPE STRING,
ORIGINOBJECTTYPE TYPE STRING,
PURCHASEORDER TYPE STRING,
RESPONSIBLEPERSON TYPE STRING,
SERVICEENTRYSHEETNAME TYPE STRING,
SERVICEENTRYSHEETUUID TYPE STRING,
SUPPLIER TYPE STRING,
PURGDOCEXTERNALSYSTEM TYPE STRING,
PURGDOCEXTERNALREFERENCE TYPE STRING,
EXTERNALREVISIONDATETIME TYPE STRING,
POSTINGDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ASRVCENTRSHT_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_ASRVCENTRSHT_STR-MANDT sy-vline 
WA_ASRVCENTRSHT_STR-SERVICEENTRYSHEET sy-vline 
WA_ASRVCENTRSHT_STR-APPROVALDATETIME sy-vline 
WA_ASRVCENTRSHT_STR-APPROVALSTATUS sy-vline 
WA_ASRVCENTRSHT_STR-CREATEDBYUSER sy-vline 
WA_ASRVCENTRSHT_STR-CREATIONDATETIME sy-vline 
WA_ASRVCENTRSHT_STR-PURCHASINGORGANIZATION sy-vline 
WA_ASRVCENTRSHT_STR-PURCHASINGGROUP sy-vline 
WA_ASRVCENTRSHT_STR-ISENDOFPURPOSEBLOCKED sy-vline 
WA_ASRVCENTRSHT_STR-CURRENCY sy-vline 
WA_ASRVCENTRSHT_STR-ISDELETED sy-vline 
WA_ASRVCENTRSHT_STR-LASTCHANGEDATETIME sy-vline 
WA_ASRVCENTRSHT_STR-LASTCHANGEDBYUSER sy-vline 
WA_ASRVCENTRSHT_STR-MATERIALDOCUMENT sy-vline 
WA_ASRVCENTRSHT_STR-MATERIALDOCUMENTYEAR sy-vline 
WA_ASRVCENTRSHT_STR-ORIGINOBJECTTYPE sy-vline 
WA_ASRVCENTRSHT_STR-PURCHASEORDER sy-vline 
WA_ASRVCENTRSHT_STR-RESPONSIBLEPERSON sy-vline 
WA_ASRVCENTRSHT_STR-SERVICEENTRYSHEETNAME sy-vline 
WA_ASRVCENTRSHT_STR-SERVICEENTRYSHEETUUID sy-vline 
WA_ASRVCENTRSHT_STR-SUPPLIER sy-vline 
WA_ASRVCENTRSHT_STR-PURGDOCEXTERNALSYSTEM sy-vline 
WA_ASRVCENTRSHT_STR-PURGDOCEXTERNALREFERENCE sy-vline 
WA_ASRVCENTRSHT_STR-EXTERNALREVISIONDATETIME sy-vline 
WA_ASRVCENTRSHT_STR-POSTINGDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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