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2.3 Client Interfaces

This section describes the facilities that PostgreSQL client interface libraries provide for accessing large objects. All large object manipulation using these functions must take place within an SQL transaction block. The PostgreSQL large object interface is modeled after the Unix file-system interface, with analogues of open, read, write, lseek, etc.

Client applications which use the large object interface in libpq should include the header file ‘libpq/libpq-fs.h’ and link with the libpq library.