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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