(PHP 4 >= 4.2.0, PHP 5)
pg_send_query — Sends asynchronous query
$connection
, string $query
)
pg_send_query() sends a query or queries asynchronously to the
connection. Unlike
pg_query(), it can send multiple queries at once to
PostgreSQL and get the results one by one using
pg_get_result().
Script execution is not blocked while the queries are executing. Use pg_connection_busy() to check if the connection is busy (i.e. the query is executing). Queries may be cancelled using pg_cancel_query().
Although the user can send multiple queries at once, multiple queries cannot be sent over a busy connection. If a query is sent while the connection is busy, it waits until the last query is finished and discards all its results.
connection
PostgreSQL database connection resource.
query
The SQL statement or statements to be executed.
Data inside the query should be properly escaped.
Devuelve TRUE en caso de éxito o FALSE en caso de error.
Use pg_get_result() to determine the query result.
Ejemplo #1 pg_send_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";
$res2 = pg_get_result($dbconn);
echo "Second call to pg_get_result(): $res2\n";
$rows2 = pg_num_rows($res2);
echo "$res2 has $rows2 records\n";
?>
El resultado del ejemplo sería:
First call to pg_get_result(): Resource id #3 Resource id #3 has 3 records Second call to pg_get_result(): Resource id #4 Resource id #4 has 1 records