ABAP Select data from SAP table ICUST_REQUEST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICUST_REQUEST
*  INTO TABLE @DATA(IT_ICUST_REQUEST2).
*--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_ICUST_REQUEST INDEX 1 INTO DATA(WA_ICUST_REQUEST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICUST_REQUEST>-MANDT = 1.
<ICUST_REQUEST>-TRANSPORTREQUESTID = 1.
<ICUST_REQUEST>-TRANSPORTREQUESTSOURCECLIENT = 1.
<ICUST_REQUEST>-TRANSPORTREQUESTTYPE = 1.
<ICUST_REQUEST>-TRANSPORTREQUESTTARGET = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICUST_REQUEST-TRANSPORTREQUESTCATEGORY, sy-vline,
  WA_ICUST_REQUEST-TRANSPORTREQUESTOWNER, sy-vline,
  WA_ICUST_REQUEST-USERDESCRIPTION, sy-vline,
  WA_ICUST_REQUEST-TRANSPORTREQUESTCHANGEDON, sy-vline,
  WA_ICUST_REQUEST-TRANSPORTREQUESTCHANGEDAT, sy-vline,
  WA_ICUST_REQUEST-TRANSPORTREQUESTDESC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICUST_REQUEST 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_ICUST_REQUEST 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_ICUST_REQUEST INTO WA_ICUST_REQUEST.


*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_ICUST_REQUEST_STR, 
MANDT TYPE STRING,
TRANSPORTREQUESTID TYPE STRING,
TRANSPORTREQUESTSOURCECLIENT TYPE STRING,
TRANSPORTREQUESTTYPE TYPE STRING,
TRANSPORTREQUESTTARGET TYPE STRING,
TRANSPORTREQUESTCATEGORY TYPE STRING,
TRANSPORTREQUESTOWNER TYPE STRING,
USERDESCRIPTION TYPE STRING,
TRANSPORTREQUESTCHANGEDON TYPE STRING,
TRANSPORTREQUESTCHANGEDAT TYPE STRING,
TRANSPORTREQUESTDESC TYPE STRING,
TRANSPORTREQUESTSTATUS TYPE STRING,
LOGHANDLE TYPE STRING,
ENABLELOGS TYPE STRING,
TRANSPORTREQUESTTYPETEXT TYPE STRING,
TRANSPORTREQUESTSTATUSTEXT TYPE STRING,
CRITICALITY TYPE STRING,
PROJECTID TYPE STRING,
PROJECTDESCRIPTION TYPE STRING,
HIDEPROJECTDETAILS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICUST_REQUEST_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_ICUST_REQUEST_STR-MANDT sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTID sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTSOURCECLIENT sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTTYPE sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTTARGET sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTCATEGORY sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTOWNER sy-vline 
WA_ICUST_REQUEST_STR-USERDESCRIPTION sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTCHANGEDON sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTCHANGEDAT sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTDESC sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTSTATUS sy-vline 
WA_ICUST_REQUEST_STR-LOGHANDLE sy-vline 
WA_ICUST_REQUEST_STR-ENABLELOGS sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTTYPETEXT sy-vline 
WA_ICUST_REQUEST_STR-TRANSPORTREQUESTSTATUSTEXT sy-vline 
WA_ICUST_REQUEST_STR-CRITICALITY sy-vline 
WA_ICUST_REQUEST_STR-PROJECTID sy-vline 
WA_ICUST_REQUEST_STR-PROJECTDESCRIPTION sy-vline 
WA_ICUST_REQUEST_STR-HIDEPROJECTDETAILS sy-vline      INTO ld_text SEPARATED BY SPACE.

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