sqlite_unbuffered_query

SQLiteDatabase::unbufferedQuery

(PHP 5 < 5.4.0, PECL sqlite >= 1.0.0)

sqlite_unbuffered_query -- SQLiteDatabase::unbufferedQuery — Execute a query that does not prefetch and buffer all data

说明

sqlite_unbuffered_query ( resource $dbhandle , string $query [, int $result_type = SQLITE_BOTH [, string &$error_msg ]] ) : resource

sqlite_unbuffered_query ( string $query , resource $dbhandle [, int $result_type = SQLITE_BOTH [, string &$error_msg ]] ) : resource

面向对象风格 (method):

public SQLiteDatabase::unbufferedQuery ( string $query [, int $result_type = SQLITE_BOTH [, string &$error_msg ]] ) : SQLiteUnbuffered

sqlite_unbuffered_query() is identical to sqlite_query() except that the result that is returned is a sequential forward-only result set that can only be used to read each row, one after the other.

This function is ideal for generating things such as HTML tables where you only need to process one row at a time and don't need to randomly access the row data.

Note:
Functions such as sqlite_seek(), sqlite_rewind(), sqlite_next(), sqlite_current(), and sqlite_num_rows() do not work on result handles returned from sqlite_unbuffered_query().

参数

dbhandle

The SQLite Database resource; returned from sqlite_open() when used procedurally. This parameter is not required when using the object-oriented method.

query

The query to be executed.

Data inside the query should be properly escaped.

result_type

可选的 result_type 参数接受常量，且决定返回的数组如何被索引。使用 SQLITE_ASSOC 会仅返回关联索引（已命名字段），而 SQLITE_NUM 会仅返回数值索引。SQLITE_BOTH 会同时返回关联和数值索引。SQLITE_BOTH 是此函数的默认值。

error_msg

The specified variable will be filled if an error occurs. This is specially important because SQL syntax errors can't be fetched using the sqlite_last_error() function.

Note: 为兼容其他数据库扩展(比如 MySQL)，支持两种可替代的语法。推荐第一种格式，函数的第一个参数是dbhandle。

返回值

Returns a result handle 或者在失败时返回 FALSE.

sqlite_unbuffered_query() returns a sequential forward-only result set that can only be used to read each row, one after the other.

更新日志

版本	说明
5.1.0	Added the `error_msg` parameter

参见

sqlite_query() - Executes a query against a given database and returns a result handle

add a note

User Contributed Notes 1 note

down

radley25 at spamcop net ¶

15 years ago


Always use this over the sqlite_fetch_* functions if possible as it's much faster.

add a note

官方地址：https://www.php.net/manual/en/function.sqlite-unbuffered-query.php

有任何技术问题请点击这里网站运营推广招聘

IT PHP 编程语言 Linux 开发编程科技 Elasticsearch HTML/CSS/XML 网络数据库 JAVA 面试 NoSQL C/C++ Golang Git 算法操作系统正则表达式 Redis 互联网 MySql JavaScript 运维软件国际架构设计 Mac OS TCP/IP Excel Vim Windows Socket Oracle VR MongoDB Python 运营 MemCache 商业硬件电子娱乐设计 nginx 摄影游戏 WordPress HTTP 团建数码电器

php7 安装fileinfo扩展 preg_split — 通过一个正则表达式分隔字符串 php位值,解决 PHP 中 usort 在值相同时改变原始位置的问题 [PHP] inet_pton/inet_ntop IP地址转换函数 [鸟哥]PHP_INT_MIN 和 -9223372036854775808 PHP 8.1 ADORecordSet对象 adodb手册 opcache预加载 Composer的Packagist资源 array_multisort() 多字段排序 PHPMailer设置utf8 PHPMailer字符集CharSet PHP json解析（json_decode）页面工具 mysql面试题 php中几种注释规范纯php实现DES以及TripleDES加密算法 [原创]诡异的php-fpm超时问题两千行PHP学习笔记 [鸟哥]PHP FFI详解 - 一种全新的PHP扩展方式 PHP获取指定函数定义在哪个文件中及行号

略微加速

PHP官方手册 - 互联网笔记

sqlite_unbuffered_query

SQLiteDatabase::unbufferedQuery

说明

参数

返回值

更新日志

参见

User Contributed Notes 1 note