PHP:pg_send_prepare()的用法_PostgreSQL函数

pg_send_prepare

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(PHP 5 >= 5.1.0)

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

说明 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.

参数

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.

返回值

Returns TRUE on success, FALSE on failure. Use pg_get_result() to determine the query result.

范例

Example #1 Using pg_send_prepare()

<?php$dbconn=pg_connect("dbname=publisher")ordie("Couldnotconnect");//Prepareaqueryforexecutionif(!pg_connection_busy($dbconn)){pg_send_prepare($dbconn,"my_query",'SELECT*FROMshopsWHEREname=$1');$res1=pg_get_result($dbconn);}//Executethepreparedquery.Notethatitisnotnecessarytoescape//thestring"Joe'sWidgets"inanywayif(!pg_connection_busy($dbconn)){pg_send_execute($dbconn,"my_query",array("Joe'sWidgets"));$res2=pg_get_result($dbconn);}//Executethesamepreparedquery,thistimewithadifferentparameterif(!pg_connection_busy($dbconn)){pg_send_execute($dbconn,"my_query",array("ClothesClothesClothes"));$res3=pg_get_result($dbconn);}?>

参见

pg_connect() - 打开一个 PostgreSQL 连接 pg_pconnect() - 打开一个持久的 PostgreSQL 连接 pg_execute() - Sends a request to execute a prepared statement with given parameters, and waits for the result. pg_send_execute() - Sends a request to execute a prepared statement with given parameters, without waiting for the result(s). pg_send_query_params() - Submits a command and separate parameters to the server without waiting for the result(s).

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