quick pl/sql question

I have a program that has these lines in it:

SQL_Stmt := 'DELETE FROM renewal_expacc_data WHERE policy_num = :1'; EXECUTE IMMEDIATE SQL_Stmt USING stage_data_rec.policy_num;

Policy_num is a character string. Everything seems to work fine unless there is a space in policy_num. Am I missing something obvious? Is there an easy way to quote the string for a bind variable that may contain spaces? Should I even have to do that??

Thanks in advance for any ideas/suggestions.

-joe

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