pg_cancel_query(3) [php man page]

PG_CANCEL_QUERY(3)														PG_CANCEL_QUERY(3)

pg_cancel_query - Cancel an asynchronous query

SYNOPSIS

       bool pg_cancel_query (resource  $connection)

DESCRIPTION

       pg_cancel_query(3) cancels an asynchronous query sent with pg_send_query(3), pg_send_query_params(3) or pg_send_execute(3). You cannot can-
       cel a query executed using pg_query(3).

PARAMETERS

	      o $connection
		- PostgreSQL database connection resource.

RETURN VALUES

	Returns TRUE on success or FALSE on failure.

EXAMPLES

       Example #1

	      pg_cancel_query(3) example

	      <?php
		$dbconn = pg_connect("dbname=publisher") or die("Could not connect");

		if (!pg_connection_busy($dbconn)) {
		    pg_send_query($dbconn, "select * from authors; select count(*) from authors;");
		}

		$res1 = pg_get_result($dbconn);
		echo "First call to pg_get_result(): $res1
";
		$rows1 = pg_num_rows($res1);
		echo "$res1 has $rows1 records

";

		// Cancel the currently running query.	Will be the second query if it is
		// still running.
		pg_cancel_query($dbconn);
	      ?>

	      The above example will output:

	      First call to pg_get_result(): Resource id #3
	      Resource id #3 has 3 records

SEE ALSO

       pg_send_query(3), pg_connection_busy(3).

PHP Documentation Group 													PG_CANCEL_QUERY(3)

PG_SEND_PREPARE(3)														PG_SEND_PREPARE(3)

pg_send_prepare - Sends a request to create a prepared statement with the given parameters, without waiting for completion.

SYNOPSIS

       bool pg_send_prepare (resource  $connection, string  $stmtname, string  $query)

DESCRIPTION

	Sends a request to create a prepared statement with the given parameters, without waiting for completion.

	This  is  an asynchronous version of pg_prepare(3): it returns TRUE if it was able to dispatch the request, and FALSE if not. After a suc-
       cessful call, call pg_get_result(3) to determine whether the server successfully created the prepared statement. The function's	parameters
       are handled identically to pg_prepare(3). Like pg_prepare(3), it will not work on pre-7.4 versions of PostgreSQL.

PARAMETERS

	      o $connection
		- PostgreSQL database connection resource. When $connection is not present, the default connection is used. The default connection
		is the last connection made by pg_connect(3) or pg_pconnect(3).

	      o $stmtname
		- The name to give the prepared statement. Must be unique per-connection. If "" is specified, then an unnamed  statement  is  cre-
		ated, overwriting any previously defined unnamed statement.

	      o $query
		-  The	parameterized  SQL  statement. Must contain only a single statement. (multiple statements separated by semi-colons are not
		allowed.) If any parameters are used, they are referred to as $1, $2, etc.

RETURN VALUES

       Returns TRUE on success, FALSE on failure. Use pg_get_result(3) to determine the query result.

EXAMPLES

       Example #1

	      Using pg_send_prepare(3)

	      <?php
		$dbconn = pg_connect("dbname=publisher") or die("Could not connect");

		// Prepare a query for execution
		if (!pg_connection_busy($dbconn)) {
		  pg_send_prepare($dbconn, "my_query", 'SELECT * FROM shops WHERE name = $1');
		  $res1 = pg_get_result($dbconn);
		}

		// Execute the prepared query.	Note that it is not necessary to escape
		// the string "Joe's Widgets" in any way
		if (!pg_connection_busy($dbconn)) {
		  pg_send_execute($dbconn, "my_query", array("Joe's Widgets"));
		  $res2 = pg_get_result($dbconn);
		}

		// Execute the same prepared query, this time with a different parameter
		if (!pg_connection_busy($dbconn)) {
		  pg_send_execute($dbconn, "my_query", array("Clothes Clothes Clothes"));
		  $res3 = pg_get_result($dbconn);
		}

	      ?>

SEE ALSO

       pg_connect(3), pg_pconnect(3), pg_execute(3), pg_send_execute(3), pg_send_query_params(3).

PHP Documentation Group 													PG_SEND_PREPARE(3)