pg_cancel_query

Cancel an asynchronous query

Description

bool pg_cancel_query ( resource $connection )

pg_cancel_query cancels an asynchronous query sent with pg_send_query, pg_send_query_params or pg_send_execute. You cannot cancel a query executed using pg_query.

Parameters

connection

PostgreSQL database connection resource.

Return Values

Returns TRUE on success or FALSE on failure.

Examples

Example #1 pg_cancel_query 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\n";
  
$rows1 pg_num_rows($res1);
  echo 
"$res1 has $rows1 records\n\n";
  
  
// 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
  • pg_connection_busy