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PHP_XLSXWriter_plus大型Mysql数据集缺少数据

[英]PHP_XLSXWriter_plus Missing Data For Large Mysql Data Sets

原文 2016-08-31 15:59:47 5 1 php/ mysql/ angularjs/ excel

I am trying out this library, because PHPExcel is in capable of not using up 3GBs of ram (probably more) when trying to download 143,000+ mysql records. 我正在尝试这个库，因为在尝试下载143,000多个mysql记录时，PHPExcel能够使用不超过3GB的ram（可能更多）。 So far this library has been an improvement as I can generate an .xlsx file without exhausting the php memory limit. 到目前为止，此库已得到改进，因为我可以生成.xlsx文件而不会耗尽php内存限制。

However, I am running into a problem where it fills in most of the data, but a couple of columns have only 3\\4 of the expected values and other columns is a hit or miss if it fills in the value for a particular cell. 但是，我遇到了一个问题，其中它填充了大多数数据，但是有几列只有3 \\ 4的期望值，而其他列如果填充了特定单元格的值则是命中或未命中。

For example, one column is called Submit Date and its format is datetime in the database, but a string from the php query. 例如，一列称为“提交日期”，其格式为数据库中的datetime，但是来自php查询的字符串。 Out of 143,828 rows of data only the first 19,483 rows have the date values filled in. 在143,828行数据中，只有前19,483行填充了日期值。

I can confirm that the missing values in the submit date column and the other missing cells do have a value\\data within the mysql database. 我可以确认提交日期列中的缺失值和其他缺失的单元格在mysql数据库中确实具有value \\ data。 Also, the submit date column is used in a ORDER BY clause in the mysql query in case that has anything to do with this problem. 另外，如果与该问题有任何关系，则在mysql查询的ORDER BY子句中使用Submit date列。

So I am trying to figure out if this is a (common?) problem with this library when downloading a large data set? 所以我试图找出这是下载大型数据集时此库的（常见吗？）问题？ Or the problem more lies more on my code up until calling on this library to generate the .xslx file. 否则问题就更多地在于我的代码，直到调用此库以生成.xslx文件为止。

Thanks. 谢谢。