When to use Large Object Facility in PostgreSQL?
PostgreSQL has a large object facility, which provides stream-style access to user data that is stored in a special large-object structure. Streaming access is useful when working with data values that are too large to manipulate conveniently as a whole.
When to use streaming access in PostgreSQL?
Streaming access is useful when working with data values that are too large to manipulate conveniently as a whole. This chapter describes the implementation and the programming and query language interfaces to PostgreSQL large object data.
What’s the difference between large objects and server side functions?
Large Objects, and Server-side Functions, make note that the functions aren’t all in the table. You’ll have to read the page and the example to see how they work. Large objects are kind of esoteric. They permit you to seek inside of them. Usually you build systems on top of them, like Raster support in PostGIS.
How to create a new large object in PSQL?
When creating a new object, you should specify InvalidOid (or 0 with a psql client) such as the server will assign by itself a new OID for this object. This way you also don’t need to worry about breaking the uniqueness of large objects OIDs. The information of a new large object is located in pg_largeobject_metadata.
How to import an object in PostgreSQL database?
Now let’s import an object to database with lo_import (the Lorem Ipsum showed previously). In this case also, server has assigned automatically a new OID for the object as importing an object implies its creation on server side. Once an object has been uploaded to a server, you can open it with lo_open.
How to get size of large object in SQL?
Gives you the size in bytes. Extracts the large object’s contents, or a substring thereof. Returns the number of bytes in the binary string. I found the solutions so far way to complex.