array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'function.pg-cancel-query.php', 1 => 'pg_cancel_query', ), 'up' => array ( 0 => 'ref.pgsql.php', 1 => 'PostgreSQL 函数', ), 'prev' => array ( 0 => 'function.pg-affected-rows.php', 1 => 'pg_affected_rows', ), 'next' => array ( 0 => 'function.pg-client-encoding.php', 1 => 'pg_client_encoding', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'zh', 'path' => 'reference/pgsql/functions/pg-cancel-query.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_cancel_query — 取消异步查询
pg_cancel_query() 取消由 pg_send_query()、pg_send_query_params() 或 pg_send_execute() 发送的异步查询。不能取消使用 pg_query() 执行的查询。
版本 | 说明 |
---|---|
8.1.0 |
现在 connection 参数接受 PgSql\Connection
实例,之前接受 resource。
|
示例 #1 pg_cancel_query() 示例
<?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);
?>
以上示例会输出:
First call to pg_get_result(): Resource id #3 Resource id #3 has 3 records