SQL Language Extension: BIT_LENGTH, CHAR_LENGTH/CHARACTER_LENGTH and OCTET_LENGTH Function: Return number of bits, characters and bytes of a string. Author: Adriano dos Santos Fernandes <adrianosf@uol.com.br> Format: <length function> ::= { BIT_LENGTH | CHAR_LENGTH | CHARACTER_LENGTH | OCTET_LENGTH } <left paren> <value expression> <right paren> Example: select rdb$relation_name, char_length(rdb$relation_name), char_length(trim(rdb$relation_name)) from rdb$relations;