pg_send_prepare
Sends a request to create a prepared statement with the given parameters, without waiting for completion
Description
intbool pg_send_prepare(PgSql\Connection $connection, string $statement_name, string $query)
This is an asynchronous version of pg_prepare: it returns true if it was able to
dispatch the request, and false if not. After a successful call, call
pg_get_result to determine whether the server successfully created the
prepared statement. The function's parameters are handled identically to
pg_prepare. Like pg_prepare, it will not work
on pre-7.4 versions of PostgreSQL.
Parameters
-
connection
-
An PgSql\Connection instance.
-
statement_name
-
The name to give the prepared statement. Must be unique per-connection. If
"" is specified, then an unnamed statement is created, overwriting any
previously defined unnamed statement.
-
query
-
The parameterized SQL statement. Must contain only a single statement.
(multiple statements separated by semi-colons are not allowed.) If any parameters
are used, they are referred to as $1, $2, etc.
Return Values
Returns true on success, false or 0 on failure. Use pg_get_result
to determine the query result.
Examples
Example #1 Using pg_send_prepare
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");
// Prepare a query for execution
if (!pg_connection_busy($dbconn)) {
pg_send_prepare($dbconn, "my_query", 'SELECT * FROM shops WHERE name = $1');
$res1 = pg_get_result($dbconn);
}
// Execute the prepared query. Note that it is not necessary to escape
// the string "Joe's Widgets" in any way
if (!pg_connection_busy($dbconn)) {
pg_send_execute($dbconn, "my_query", array("Joe's Widgets"));
$res2 = pg_get_result($dbconn);
}
// Execute the same prepared query, this time with a different parameter
if (!pg_connection_busy($dbconn)) {
pg_send_execute($dbconn, "my_query", array("Clothes Clothes Clothes"));
$res3 = pg_get_result($dbconn);
}
?>
See Also
- pg_connect
- pg_pconnect
- pg_execute
- pg_send_execute
- pg_send_query_params