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PLS-00122:

%s as separator is allowed only with specific built-in functions
Cause: A few built-in functions use keywords (instead of commas) as argument separators: Built-in function Argument separators --------------------------------------------- CHR, TRANSLATE USING CAST AS TRIM TRAILING, LEADING, BOTH, FROM A function different from one of these built-in functions is using a keyword as an argument separator.
Action: Correct the argument list or change the function name.