Custom GraphQL Scalars in Oracle

GraphQL natively supports the following types: String, Float, Int, Boolean, and ID.

Custom scalar types are added to provide mapping for RDBMS native scalar types: Date, Timestamp, Timestamptz, JSON, Binary, Vector, DsInterval, and Yminterval.

The following table summarizes how Oracle RDBMS’s native scalar types are mapped to GraphQL’s scalar types:

Table 2-1 Scalar Types: Oracle Type, OSON Type, JSON Type, GraphQL Type and GraphQL Type in Oracle

Oracle Type	GraphQL Type in Oracle
(all char types)	String
Integer	Integer
Float	Float
Number (scale=0)	Integer
Number (scale>0)	Number
Binary_Float	Float
Binary_Double	Double
Raw/Blob/Bfile	Binary
Date	Date
Timestamp	Timestamp
Timestamp TZ	Timestamptz
JSON	String
ROWID/UROWID	String
Boolean	Boolean
Vector	Vector
Interval_DS	Dsinterval
Interval_YM	Yminterval
Abstract Data Type	String