Literals

With the Logging service, all fields are considered scalar text fields. In DQL expressions, literals syntactically can be and of the following:

•	Boolean: true, false

•	Numeric: 0, -123, 3.14, 2.718e-6

•	Timestamp: '2015-01-01' '2015-03-13 23:59:59'

•	Terms: John, Fo*, Event_413

•	Strings: "John Smith", 'cihSptpZrCM6oXaVQH6dwA=='

However, a literal is always interpreted as a text value when compared to a field. Within a quoted string value, escaping can be used for non-printable or other characters. Doradus uses the backslash for escaping, and there are two escape formats:

•	\x: Where x can be one of these characters: t (tab character), b (backspace), n (newline or LF), r (carriage return), f (form feed), ' (single quote), " (double quote), or \ (backslash).

•	\uNNNN: This escape sequence can be used for any Unicode character. NNNN must consist of four hex characters 0-F.

For example, the string "Hello!World" can also be specified as "Hello\u0021World".