Returns the characters of the argument with trailing blanks removed.

The schema is SYSFUN.

expression

The expression can be of any built-in character string data type.
For a VARCHAR the maximum length is 4 000 bytes and for a CLOB the maximum length is 1 048 576 bytes.

The result of the function is:

• VARCHAR(4000) if is VARCHAR (not exceeding 4 000 bytes) or CHAR
• CLOB(1M) if expression is CLOB or LONG VARCHAR

The result can be null; if expression< is null, the result is the null.