获取 MySQL 中受影响的行数

Question

正在尝试获取受影响的行return 0 个文件包含 250k 条记录：

$affectedRows = 0;
$affectedRows = $pdo->exec(
        "DELETE FROM tablename WHERE Col3 BETWEEN '2018-01-01 00:00:00' AND '2018-01-31 00:00:00';
        ALTER TABLE tablename AUTO_INCREMENT = 1;
        LOAD DATA LOCAL INFILE 'file.csv' INTO TABLE tablename 
        FIELDS TERMINATED BY ',' 
        LINES TERMINATED BY ' ' ( `Col1`, `Col2`, `Col3`)");

echo var_dump($affectedRows);

存储 CSV 但 Return 0

Answer 1

解决方法：

完全支持此脚本：

LOAD DATA LOCAL INFILE 'file.csv' INTO TABLE tablename 
FIELDS TERMINATED BY ',' 
LINES TERMINATED BY ' ' ( `Col1`, `Col2`, `Col3`)

但我在某些查询中将它与其他合并：

DELETE FROM tablename WHERE date BETWEEN '$Date1' AND '$Date2';
ALTER TABLE tbalename AUTO_INCREMENT = 1;
LOAD DATA LOCAL INFILE 'file.csv' INTO TABLE tablename 
    FIELDS TERMINATED BY ',' 
    LINES TERMINATED BY ' ' ( `Col1`, `Col2`, `Col3`);

这是错误的，因为 $PDO->exec() 无法 return 受影响的 table 或行数。

为了解决这个问题，我需要传递一个数组，因为我的脚本是这样支持它的：

$stmtpre[1] = "DELETE FROM tablename WHERE date BETWEEN '$Date1' AND '$Date2';";
$stmtpre[2] = "ALTER TABLE tbalename AUTO_INCREMENT = 1;";
$stmtpre[3] = "LOAD DATA LOCAL INFILE 'file.csv' INTO TABLE tablename 
        FIELDS TERMINATED BY ',' 
        LINES TERMINATED BY ' ' ( `Col1`, `Col2`, `Col3`);";

同样如此：

获取 MySQL 中受影响的行数

Get number of affected rows in MySQL

mysql

pdo

load-data-infile