获取sql查询的开始/结束时间

Question

我正在使用 PHP 将 CSV 解析为 MySQL 表。

1. 我的表“文件”中有名为“StartTime”（文件解析开始）、“EndTime”（文件解析结束）和“CreationDate”（行的时间）的时间戳列已创建）。有什么方法可以得到这些时间？ NOW() 是一个好的解决方案吗？

2. 我还有一个名为“有错误的行”的列，它是其中有错误因此不会解析的行数。如何检索 CSV 文件中出现错误的行数？ （有错误的行就是类型错误的行，例如应该是：[varchar,int,timestamp,timestamp,timestamp]]

这是我的代码：

function parse($file) { 

$file_handle = fopen($file, "r"); //opens CSV
while (($row = fgetcsv($file_handle, 1000, ",")) !== false){

$file_name = basename($file);
$Rows_with_errors = ?;
$StartDate= date("Y-m-d H:i:s", time() ); //?
$EndDate=?;
$CreationDate=?;

$sql = "INSERT INTO file (Filename, TotalNumberOfRows, RowsWithErrors, StartDate, EndDate, CreationDate) 
VALUES('$file_name','$Total_nr_of_Rows', '$Rows_with_errors', '$StartDate', '$EndDate', '$CreationDate')";

global $conn;
$conn->query($sql); //executes the query
}

if ($sql)
    {
        echo 'Data uploaded to database!';
    }
else {
        echo "Error: " . $sql . "<br>" . $conn->error;
}
}

Answer 1

我从来没有运行过这个，希望它有效。解释在代码中。

<?php

function parse($file) {

    //Initialize some variables here. Probably in some constants etc.
    $dateRegex = '|^\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}$|'; //Just a rough check. I purposely skip the case of like 9999-99-99 99:99:99. Up to you to refine this.
    $dateFormat = 'Y-m-d H:i:s';

    //In fact checking the file exist or not is probably useful too:
    //if (is_file($file)) ...

    //Opens CSV in read mode
    $file_handle = fopen($file, "r");

    //We don't need to put this in the loop since it's a one time job
    $file_name = basename($file);

    //We also initialize the variable outside the while loop so that we can increment it
    $Rows_with_errors = 0;
    $Total_nr_of_Rows = 0;

    //StartDate of the parsing, shouldn't it be outside of the while loop too?
    //Also, using "date" will gives you the time in the timezone that you set in your php.ini's date.timezone property.
    //Using "gmdate" will gives you the time in GMT time.
    $StartDate = date($dateFormat, time());

    while (($row = fgetcsv($file_handle, 1000, ",")) !== false) {

        ++$Total_nr_of_Rows;

        //So here, we are looping row by row. Do your checking here:
        if (!(is_string($row[0]) &&
            is_numeric($row[1]) &&
            preg_match($dateRegex, $row[2]) &&
            preg_match($dateRegex, $row[3]) &&
            preg_match($dateRegex, $row[4]))) {

                //Increment the error
                ++$Rows_with_errors;
        }
    }

    //That's it. We insert it now
    //Creation date & end date, probably the same, no? we initialize here:
    $CreationDate = $EndDate = date($dateFormat, time());

    //This is bad. There is no escaping, and YOU ARE RISK OF QUERY INJECTION FROM THE $file_name VARIABLE.
    //I won't discuss it here since this is not the scope of the question.
    $sql = "INSERT INTO file (Filename, TotalNumberOfRows, RowsWithErrors, StartDate, EndDate, CreationDate) 
VALUES('$file_name','$Total_nr_of_Rows', '$Rows_with_errors', '$StartDate', '$EndDate', '$CreationDate')";

    global $conn;
    $conn->query($sql); //executes the query

    if ($sql){
        echo 'Data uploaded to database!';
    }else {
        echo "Error: " . $sql . "<br>" . $conn->error;
    }
}