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Unsupported versions: 7.4 / 7.3 / 7.2 / 7.1
Historical version. PostgreSQL 7.4 reached end of support in October 2010. See the current manual for supported releases.
PostgreSQL 7.4.30 Documentation
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pg_lo_read

Name

pg_lo_read -- read from a large object

Synopsis

pg_lo_read conn descriptor bufVar len

Description

pg_lo_read reads at most len bytes from a large object into a variable named bufVar.

Arguments

conn

The handle of a connection to the database in which the large object exists.

descriptor

A descriptor for the large object from pg_lo_open.

bufVar

The name of a buffer variable to contain the large object segment.

len

The maximum number of bytes to read.

Return Value

The number of bytes actually read is returned; this could be less than the number requested if the end of the large object is reached first. In event of an error, the return value is negative.

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