pg_send_prepare

(PHP 5 >= 5.1.0, PHP 7, PHP 8)

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

说明

pg_send_prepare(PgSql\Connection $connection, string $statement_name, string $query): int|bool

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: 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.

返回值

Returns true on success, false or 0 on failure. Use pg_get_result() to determine the query result.

更新日志

版本	说明
8.1.0	现在 `connection` 参数接受 PgSql\Connection 实例，之前接受资源(resource)。

范例

示例 #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);
  }
  
?>

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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官方地址：https://www.php.net/manual/en/function.pg-send-prepare.php

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pg_send_prepare

说明

参数

返回值

更新日志

范例

参见

User Contributed Notes