pg_lo_read − read from a large object
pg_lo_read conn descriptor bufVar len
pg_lo_read reads at most len bytes from a large object into a variable named bufVar.
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. |
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.