SciDB AFL statements are normally executed in a stateless query context.
Use scidb_prefix to create compound AFL expressions useful in some
circumstances.
Usage
scidb_prefix(db, expression = NULL)
Arguments
db
a scidb database connection returned from scidbconnect
expression
a valid AFL expression to be issued prior to, and in the same context as all subsequent
query expressions issued to the database corresponding to db. Set expression=NULL to remove the prefix expression.
Value
A new SciDB database connection object with the prefix set.