pg_send_query
(PHP 4 >= 4.2.0, PHP 5)
pg_send_query --
Sends asynchronous query
Description
bool
pg_send_query ( resource 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.
Parameters
connection
PostgreSQL database connection resource.
query
The SQL statement or statements to be executed.
Return Values
Returns TRUE on success or FALSE on failure.
Use pg_get_result() to determine the query result.
Examples
Example 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";
?>
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The above example will output: 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 |
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