pg_send_prepare

Sends a request to create a prepared statement with the given parameters, without waiting for completion.

Description

bool pg_send_prepare ( resource $connection , string $stmtname , string $query )

Sends a request to create a prepared statement with the given parameters, without waiting for completion.

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

PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect or pg_pconnect.

stmtname

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 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