#void pq\COPY::__construct(pq\Connection $conn, string $expression, int $direction[, string $options = NULL])

Start a COPY operation.

Params:#

• pq\Connection $conn#
  The connection to use for the COPY operation.
• string $expression#
  The expression generating the data to copy.
• int $direction#
  Data direction (pq\COPY::FROM_STDIN or pq\COPY::TO_STDOUT).
• Optional string $options# = NULL
  Any COPY options (see the official PostgreSQL documentation for details.

Throws:#

• pq\Exception\InvalidArgumentException
• pq\Exception\BadMethodCallException
• pq\Exception\RuntimeException