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   1 # void pq\LOB::__construct(pq\Transaction $txn[, int $oid = pq\LOB::INVALID_OID[, int $mode = pq\LOB::RW]])
   2
   3 Open or create a *large object*.
   4 See pq\Transcation::openLOB() and pq\Transaction::createLOB().
   5
   6 ## Params:
   7
   8 * pq\Transaction $txn
   9   The transaction which wraps the *large object* operations.
  10 * Optional int $oid = pq\LOB::INVALID_OID
  11   The OID of the existing *large object* to open.
  12 * Optional int $mode = pq\LOB::RW
  13   Access mode (read, write or read/write).
  14
  15 ## Throws:
  16
  17 * pq\Exception\InvalidArgumentException
  18 * pq\Exception\BadMethodCallException
  19 * pq\Exception\RuntimeException