String Function (string_function)

				
<string_function>::=
  <ALPHA>(<string_spec>[,<unsigned_integer>])
| <ASCII>(<string_spec>)
| <CONCAT>(<string_spec>,<string_spec>)
| <EXPAND>(<string_spec>,<unsigned_integer>)
| <INITCAP>(<string_spec>)
| <LFILL>(<string_spec>,<string_literal>[,<unsigned_integer>])
| <LOWER>(<string_spec>)
| <LPAD>(<string_spec>,<expression>,<string_literal>[,<unsigned_integer>])
| <LTRIM>(<string_spec>[,<string_spec>])
| <MAPCHAR>(<string_spec>[,<unsigned_integer>][,< mapchar_set_name>])
| <REPLACE>(<string_spec>,<string_spec>[,<string_spec>])
| <RFILL>(<string_spec>,<string_literal>[,<unsigned_integer>])
| <RPAD>(<string_spec>,<expression>,<string_literal>[,<unsigned_integer>])
| <RTRIM>(<string_spec>[,<string_spec>])
| <SOUNDEX>(<string_spec>)
| <SQLMODE>()
| <SUBSTR>(<string_spec>,<expression>[,<expression>])
| <TRANSLATE>(<string_spec>,<string_spec>,<string_spec>)
| <TRIM>(<string_spec>[,<string_spec>])
| <UPPER>(<string_spec>)
| <string_spec> || <string_spec>
| <string_spec> & <string_spec>

<string_spec>::=
  <expression>