ABAP Select data from SAP table V_UCONCUSTHEAD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_UCONCUSTHEAD
*  INTO TABLE @DATA(IT_V_UCONCUSTHEAD2).
*--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_V_UCONCUSTHEAD INDEX 1 INTO DATA(WA_V_UCONCUSTHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_UCONCUSTHEAD>-MANDT = 1.
<V_UCONCUSTHEAD>-ID = 1.
<V_UCONCUSTHEAD>-PROFILE = 1.
<V_UCONCUSTHEAD>-UCON_AUTH = 1.
<V_UCONCUSTHEAD>-UCON_EXPIR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_UCONCUSTHEAD-UCON_OPTION, sy-vline,
  WA_V_UCONCUSTHEAD-UCON_TIME, sy-vline,
  WA_V_UCONCUSTHEAD-UCON_AUTHTRC, sy-vline,
  WA_V_UCONCUSTHEAD-UCONBITMAP, sy-vline,
  WA_V_UCONCUSTHEAD-COMPR_FLAG, sy-vline,
  WA_V_UCONCUSTHEAD-ACCESSIBILITY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_UCONCUSTHEAD 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_V_UCONCUSTHEAD 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_V_UCONCUSTHEAD INTO WA_V_UCONCUSTHEAD.


*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 ISOLA, internal->external for field UCON_LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_V_UCONCUSTHEAD-UCON_LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_UCONCUSTHEAD-UCON_LANGU.
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_V_UCONCUSTHEAD_STR, 
MANDT TYPE STRING,
ID TYPE STRING,
PROFILE TYPE STRING,
UCON_AUTH TYPE STRING,
UCON_EXPIR TYPE STRING,
UCON_OPTION TYPE STRING,
UCON_TIME TYPE STRING,
UCON_AUTHTRC TYPE STRING,
UCONBITMAP TYPE STRING,
COMPR_FLAG TYPE STRING,
ACCESSIBILITY TYPE STRING,
UCON_JAVA TYPE STRING,
CATEGORY TYPE STRING,
READONLY TYPE STRING,
UCON_ESI_FLAG TYPE STRING,
UCON_ESI_LOGON TYPE STRING,
UCON_REAUTH_OFF TYPE STRING,
UCON_MANDT TYPE STRING,
UCON_LANGU TYPE STRING,
OBLUSRFLAG TYPE STRING,
PROTSEC TYPE STRING,
X509FLAG TYPE STRING,
SSLFLAG TYPE STRING,
ALIASLOGIN TYPE STRING,
FALLTHRU TYPE STRING,
SYSLOG401 TYPE STRING,
LOG_FLAG TYPE STRING,
NOHEREDITY TYPE STRING,
SAML_FLAG TYPE STRING,
SYSLOGIN TYPE STRING,
CREATEDBY TYPE STRING,
CREATEDON TYPE STRING,
CREATEDAT TYPE STRING,
CHANGEDBY TYPE STRING,
CHANGEDON TYPE STRING,
CHANGEDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_UCONCUSTHEAD_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_V_UCONCUSTHEAD_STR-MANDT sy-vline 
WA_V_UCONCUSTHEAD_STR-ID sy-vline 
WA_V_UCONCUSTHEAD_STR-PROFILE sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_AUTH sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_EXPIR sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_OPTION sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_TIME sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_AUTHTRC sy-vline 
WA_V_UCONCUSTHEAD_STR-UCONBITMAP sy-vline 
WA_V_UCONCUSTHEAD_STR-COMPR_FLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-ACCESSIBILITY sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_JAVA sy-vline 
WA_V_UCONCUSTHEAD_STR-CATEGORY sy-vline 
WA_V_UCONCUSTHEAD_STR-READONLY sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_ESI_FLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_ESI_LOGON sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_REAUTH_OFF sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_MANDT sy-vline 
WA_V_UCONCUSTHEAD_STR-UCON_LANGU sy-vline 
WA_V_UCONCUSTHEAD_STR-OBLUSRFLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-PROTSEC sy-vline 
WA_V_UCONCUSTHEAD_STR-X509FLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-SSLFLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-ALIASLOGIN sy-vline 
WA_V_UCONCUSTHEAD_STR-FALLTHRU sy-vline 
WA_V_UCONCUSTHEAD_STR-SYSLOG401 sy-vline 
WA_V_UCONCUSTHEAD_STR-LOG_FLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-NOHEREDITY sy-vline 
WA_V_UCONCUSTHEAD_STR-SAML_FLAG sy-vline 
WA_V_UCONCUSTHEAD_STR-SYSLOGIN sy-vline 
WA_V_UCONCUSTHEAD_STR-CREATEDBY sy-vline 
WA_V_UCONCUSTHEAD_STR-CREATEDON sy-vline 
WA_V_UCONCUSTHEAD_STR-CREATEDAT sy-vline 
WA_V_UCONCUSTHEAD_STR-CHANGEDBY sy-vline 
WA_V_UCONCUSTHEAD_STR-CHANGEDON sy-vline 
WA_V_UCONCUSTHEAD_STR-CHANGEDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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