Emulate the utf8_general_ci collation in mysql database

I am in the process of integrating a javascript application with a third-party API that manages names in a database. The challenge I am facing is that the third-party application uses utf8_general_ci collation to determine name uniqueness, while my application needs to dynamically decide if a name already exists in their database to avoid duplicate errors. Here's how the process unfolds:

  1. The user enters a name into my application: "somename"

  2. My application sends a search request to the third-party API for "somename", which returns:

[
  {
    "id": 1,
    "name": "Somënamë"
  },
  {
    "id": 2,
    "name": "somename somesecondname"
  },
  {
    "id": 3,
    "name": "somename someothername"
  }
]

  1. My application must determine whether to create a new record for "somename" or use one of the existing results

In this scenario, my application needs to recognize that "somename" and "Somënamë" are considered equal under a utf8_general_ci comparison, and therefore should use the record with id=1, rather than attempting to create a duplicate entry.

In essence, I need to replicate the same string comparison behavior as the third-party database.

One approach I have explored involves directly using a mysql instance for comparison, like so:

SELECT IF(_utf8:string1 COLLATE utf8_general_ci = _utf8:string2 COLLATE utf8_general_ci, "true", "false") as equals;

However, this method proves to be too resource-intensive for situations where we may encounter thousands of results.

Is there a way to simulate this collation check in JavaScript somewhat accurately, without resorting to hosting a database on my end?

Answer №1

It appears that you may be overexerting yourself.

If both the column and connection are set to COLLATION utf8_general_ci, then Somënamë will equal somename due to the case folding and accent stripping carried out by _ci.

Consider making the column UNIQUE. Instead of executing a SELECT statement, monitor for a duplicate key error during the INSERT operation.

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