DEFINE PARAM statement
The DEFINE PARAM statement allows you to define global (database-wide) parameters that are available to every client.
Requirements
- You must be authenticated as a root or namespace user before you can use the
DEFINE PARAMstatement. - You must select your namespace and database before you can use the
DEFINE PARAMstatement.
Statement syntax
SurrealQL SyntaxDEFINE PARAM [ IF NOT EXISTS ] $@name VALUE @value;
Example usage
Below shows how you can create a parameter using the DEFINE PARAM statement.
DEFINE PARAM $endpointBase VALUE "https://dummyjson.com";
Then, simply use the global parameter like you would with any variable.
RETURN http::get($endpointBase + "/products");
Using IF NOT EXISTS clause Since 1.3.0
The IF NOT EXISTS clause can be used to define a param only if it does not already exist. If the param already exists, the DEFINE PARAM statement will return an error.
-- Create a PARAM if it does not already exist
DEFINE PARAM IF NOT EXISTS $example VALUE 123;