What happens if a character is not existing in db characterset?

Hello

I have a 10.2 db with WE8ISO8859P15 charset.
Our forms application runs on windows clients - they use inside NLS_LANG WE8MSWIN1252.

Now the user want to store the sign of ascii 151 "em dash" (copy/paste from MS Word).
As far as I know, the chracterset db 'don't know' this character and shows the question mark reversed in oracle forms.

My question is:
Will be the database to store ascii 191 (question mark reversed) if the character is not existing in chracterset db? Or which character will be stored?
(No it would be more logical if the PB store not this character?)


Thank you
Florian.

If you attempt to insert a character that does not exist in the game (except in a few special cases where you have misconfigured the system to work around the character set conversion) character database Oracle actually stores a wildcard character. Maybe it's the base character (for example Oracle can store a regular 'e' instead of an 'e' accentuated if the accented 'e' does not exist in the database character set) or it can be a wildcard (i.e. upside down question mark). In both cases, the conversion is dissipative - you will not be able to recover the original character of the data that is stored in the database.

In your particular case, the character represented by the value of 115 in Windows-1252, which is not a character corresponding to ISO-8859-15, head down question mark (191 in ISO-8859-15 value) would be stored in the database. You can confirm that by issuing the query

SELECT DUMP( your_column_name )
  FROM your_table_name
 WHERE your_key = <>

This will show the values are actually stored in the database.

Justin

Tags: Database

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