Some of the client and server interfacing parcels such as DataInfo (parcel flavor 71), DataInfoX (parcel flavor 146), PrepInfo (parcel flavor 86), PrepInfoX (parcel flavor 125) and StatementInfo (parcel flavor 169) return the data type of the field. All parcels that contain the data type information use the following encoding for the JSON data type. The encoding numbers defined follow the pattern for existing data types. For example, Nullable number is non-Nullable value + 1 and stored procedure IN parameter type number is 500 + non-nullable number.
| Data Type | NULL Property | Stored Procedure Parameter Type | |||
|---|---|---|---|---|---|
| Non-nullable | Nullable | IN | INOUT | OUT | |
| Large JSON Data Inline | 880 | 881 | 1380 | 1381 | 1382 |
| Large JSON Data Locator | 884 | 885 | 1384 | 1385 | 1386 |
| Large JSON Data Deferred | 888 | 889 | 1388 | 1389 | 1390 |
These codes are sent from server to client, and are accepted by server from client in the parcels described in the following sections. The only restriction is the type may not be used in the USING clause. VARCHAR/CLOB can be used in the USING clause and when necessary, this data is implicitly cast to the JSON type.