Attribute data types

The attribute type identifies the type of data allowed for the attribute value (key-value pair).

The Dgraph supports the following attribute data types:

Attribute type	Description
mdex:string	XML-valid character strings.
mdex:int	A 32-bit signed integer. Although the Dgraph supports mdex:int attributes, they are not used by Data Processing workflows.
mdex:long	A 64-bit signed integer. mdex:long values accepted by the Dgraph can be up to the value of 9,223,372,036,854,775,807.
mdex:double	A floating point value.
mdex:time	Represents the hour and minutes of an instance of time, with the optional specification of fractional seconds. The time value can be specified as a universal (UTC) date time or as a local time plus a UTC time zone offset.
mdex:dateTime	Represents the year, month, day, hour, minute, and seconds of a time point, with the optional specification of fractional seconds. The dateTime value can be specified as a universal (UTC) date time or as a local time plus a UTC time zone offset.
mdex:duration	Represents a duration of the days, hours, and minutes of an instance of time. Although the Dgraph supports mdex:duration attributes, they are not used by Data Processing workflows.
mdex:boolean	A Boolean. Valid Boolean values are `true` (or `1`, which is a synonym for `true`) and `false` (or `0`, which is a synonym for `false`).
mdex:geocode	A latitude and longitude pair. The latitude and longitude are both double-precision floating-point values, in units of degrees.

During a Data Processing workflow, the created Dgraph attributes are derived from the columns in a Hive table. For information on the mapping of Hive column data types to Dgraph attribute data types, see Data type discovery.