#class pq\LOB

A large object.

NOTE:
Working with large objects requires an active transaction.

Constants:#

• INVALID_OID#
  0, representing an invalid OID.
• R#
  Read-only mode.
• W#
  Write-only mode.
• RW#
  Read/write mode.

Properties:#

• public (readonly) pq\Transaction $transaction#
  The transaction wrapping the operations on the large object.
• public (readonly) int $oid#
  The OID of the large object.
• public (readonly) resource $stream#
  The stream connected to the large object.

Functions:#

• LOB::__construct#

  Open or create a large object.

  void pq\LOB::__construct(pq\Transaction $txn[, int $oid = pq\LOB::INVALID_OID[, int $mode = pq\LOB::RW]])

• LOB::read#

  Read a string of data from the current position of the large object.

  string pq\LOB::read([int $length = 0x1000[, int &$read = NULL]])

• LOB::seek#

  Seek to a position within the large object.

  int pq\LOB::seek(int $offset[, int $whence = SEEK_SET])

• LOB::tell#

  Retrieve the current position within the large object.

  int pq\LOB::tell()

• LOB::truncate#

  Truncate the large object.

  void pq\LOB::truncate([int $length = 0])

• LOB::write#

  Write data to the large object.

  int pq\LOB::write(string $data)