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mevdschee / php-crud-api

Single file PHP script that adds a REST API to a SQL database

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Usage question - how to get number of records of very large dataset

focussing opened this issue · comments

commented

Hi!

I am using the api to get logging data from a MySQL database. The idea is that the user wants to look at the data "of the last hour" or "last day" etc.
Currently I want to get the last record like this http://192.168.x.xxx/api.php/records/logging?order=date,desc&page=1,1 and that results in the following JSON.

{
  "records": [
    {
      "id": 586355,
      "date": "2024-07-15 11:05:35",
      "log": "15;0;-99.93,-62.46,-100.04,-100.04,-24.98,-900.11,-29.99,-49.97"
    }
  ],
  "results": 586354
}

But it takes around 8 seconds. When I want to retrieve the first record using http://192.168.x.xxx/api.php/records/loggingpage=1,1 the result is presented within one second.

Would there be a faster way, or maybe set it up differently?
Looking forward to hearing from you :)

Best regards
Raymond

commented

Hi Raymond, Did you add an index to the date column? Kind regards, Maurits

commented

Hi Maurits,
Hm, no I did not; I will try that! Thank you!
How would you fetch for example the records of the "last hour"? Just creating a date string from the current time minus one day? Or is there a more fancy way?

Kind regards, Raymond

commented

Just creating a date string from the current time minus one day?

Yes, use DB date strings, such as:

filter=date,gt,2019-03-09 08:20:33

Also known as the MySQL datetime format.