#define SQLITE_SERIALIZE_NOCOPY 0x001 /* Do no memory allocations */
Zero or more of the following constants can be OR-ed together for the F argument to sqlite3_serialize(D,S,P,F).
SQLITE_SERIALIZE_NOCOPY means that sqlite3_serialize() will return a pointer to contiguous in-memory database that it is currently using, without making a copy of the database. If SQLite is not currently using a contiguous in-memory database, then this option causes sqlite3_serialize() to return a NULL pointer. SQLite will only be using a contiguous in-memory database if it has been initialized by a prior call to sqlite3_deserialize().
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