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   1 # void pq\COPY::__construct(pq\Connection $conn, string $expression, int $direction[, string $options = NULL])
   2
   3 Start a COPY operation.
   4
   5 ## Params:
   6
   7 * pq\Connection $conn
   8   The connection to use for the COPY operation.
   9 * string $expression
  10   The expression generating the data to copy.
  11 * int $direction
  12   Data direction (pq\COPY::FROM_STDIN or pq\COPY::TO_STDOUT).
  13 * Optional string $options = NULL
  14   Any COPY options (see the [official PostgreSQL documentaion](http://www.postgresql.org/docs/current/static/sql-copy.html) for details.