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Asked: 2026-06-09T13:29:03+00:00

I have a csv file which should be loaded in sequential order so I

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I have a csv file which should be loaded in sequential order so I can update blank person_name field with the previous row’s person_name.

I have added a id (auto increment) which I can use to update the blank rows.

Table person

id   person_name     car      model
1    Fred            Volvo    2001
2                    FIAT     2000
3    Paul            Volvo    2010

My doubt is, Can I be confident that the file will always be loaded in sequential order?

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1 Answer

  1. Editorial Team

    Although documentation does not state that I think it’s pretty safe bet that data will inserted into table sequentially, line by line.

    However keep in mind that it does not guarantee that rows will be in any order when retrieved from table.

    Different storage engines may (and do) internally allocate rows differently and retrieve them in completely different order. Therefore it is not safe for You to relay on that. You should either number Your rows in input file and use line_id/row_id for further processing or process the file before You load it into MySQL server.

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