pg_prepare

pg_prepare

Submits a request to the server to create a prepared statement with the given parameters, and waits for completion

 **pg_prepare** PgSql\Connection $connection string $stmtname string $query

creates a prepared statement for later execution with
or .

This feature allows commands that will be used repeatedly to be parsed and planned just once, rather than each time they are executed. pg_prepare``pg_execute``pg_send_execute

The function creates a prepared statement named from the string, which must contain a single SQL command. may be to create an unnamed statement, in which case any pre-existing unnamed statement is automatically replaced; otherwise it is an error if the statement name is already defined in the current session. If any parameters are used, they are referred to in the as , , etc. stmtname``query``stmtname``""``query``$1``$2

Prepared statements for use with can also be created by executing SQL statements. (But is more flexible since it does not require parameter types to be pre-specified.) Also, although there is no PHP function for deleting a prepared statement, the SQL statement can be used for that purpose. pg_prepare``PREPARE``pg_prepare``DEALLOCATE

connection``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 , , etc. $1``$2

An instance on success, return.falseforfailure. PgSql\Result

**Voorbeeld: Using **

<?php

// Connect to a database named "mary"
$dbconn = pg_connect("dbname=mary");

// Prepare a query for execution
$result = pg_prepare($dbconn, "my_query", 'SELECT * FROM shops WHERE name = $1');

// Execute the prepared query.  Note that it is not necessary to escape
// the string "Joe's Widgets" in any way
$result = pg_execute($dbconn, "my_query", array("Joe's Widgets"));

// Execute the same prepared query, this time with a different parameter
$result = pg_execute($dbconn, "my_query", array("Clothes Clothes Clothes"));

?>

pg_execute``pg_send_execute