pg_affected_rows
(PHP 4 >= 4.2.0, PHP 5, PHP 7, PHP 8)
pg_affected_rows — 返回受影响的记录数（元组）
说明
pg_affected_rows() 返回受 INSERT、UPDATE
和 DELETE 查询影响的元组数（实例/记录/行）。
从 PostgreSQL 9.0 及更高版本开始，服务器返回 SELECT 的行数。较旧的 PostgreSQL 则返回 0。
注意:
此函数过去称为 pg_cmdtuples()。
返回值
受查询影响的行数。如果没有元组受到影响，它将返回 0。
更新日志
| 版本 | 说明 |
|---|---|
| 8.1.0 |
现在 result 参数接受 PgSql\Result
实例，之前接受 resource。
|
示例
示例 #1 pg_affected_rows() 示例
<?php
$result = pg_query($conn, "INSERT INTO authors VALUES ('Orwell', 2002, 'Animal Farm')");
$cmdtuples = pg_affected_rows($result);
echo $cmdtuples . " tuples are affected.\n";
?>以上示例会输出：
1 tuples are affected.
参见
- pg_query() - 执行查询
- pg_query_params() - Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text
- pg_execute() - Sends a request to execute a prepared statement with given parameters, and waits for the result
- pg_num_rows() - 返回结果中行的数量
＋添加备注
用户贡献的备注 4 notes
Anonymous ¶
17 years ago
pg-affected-rows () only runs on the LAST SQL STATEMENT executed. If you compound several statements together then pg_affected_rows might not return what you expect.
For example:
<?php
$result = pg_query ('BEGIN; INSERT INTO foo (bar) VALUES (\'baz\'; COMMIT');
echo (pg_affected_rows ($result));
?>
will cause 0 to be printed, because the last statement executed by Postgres was COMMIT, which doesn't affect any rows.
I haven't tried this so am not certain it works, but you SHOULD be able to get the row counts you want if you split your queries up.
For example:
<?php
$result = pg_query ('BEGIN; INSERT INTO foo (bar) VALUES (\'baz\';');
echo (pg_affected_rows ($result));
pg_query ('COMMIT;');
?>
should allow you to get the number of rows affected by the previous query. I haven't tried this yet though, so don't count on it.
Bruno Baguette ¶
19 years ago
Note that when you submit several SQL queries, within one BEGIN;COMMIT; like this one :
$SQLQuery = 'BEGIN;';
$SQLQuery.= 'INSERT INTO a (a,b) VALUES (1,2);';
$SQLQuery.= 'INSERT INTO b (ref_b,c) VALUES (2,5);';
$SQLQuery.= 'COMMIT;';
$HandleResults = pg_query($SQLQuery);
echo(pg_affected_rows($HandleResults));
pg_affected_rows() will return 0
Anonymous ¶
17 years ago
There is something called auto-commit, when you supply more than one query delimited by ; semicolon all-or-none is done if one fails. No need for BEGIN;COMMIT;ROLLBACK when doing one query. its logic to mee pg_affected_rows() returns affected rows and if you want to do 2 queries apart from each other.. do a BEGIN and then 1 and get pg_affected_rows() then do 2 and get pg_affected_rows() and then finally do COMMIT;备份地址：http://www.lvesu.com/blog/php/function.pg-affected-rows.php