How to deal with accented characters in iOS SQLite?

Question

I need to perform a SELECT queries that are insensitive to case and accents. For demo purposes, I create a table like that:

create table table
(
  column tex         


        

Answer 1

Here is my solution of LIKE problem

static void myLow(sqlite3_context *context, int argc, sqlite3_value **argv)
{
    NSString* str = [[NSString alloc] initWithUTF8String:
                            (const char *)sqlite3_value_text(argv[0])];
    const char* s = [[str lowercaseString] UTF8String];
    sqlite3_result_text(context, s, strlen(s), NULL);
    [str release];
}

// call it once after opening db
sqlite3_create_function(_db, "myLow", 1, SQLITE_UTF8,NULL, &myLow, NULL, NULL);

And then instead of query

SELECT * FROM table WHERE column LIKE 'a'

you should use

SELECT * FROM table WHERE myLow(column) LIKE 'a'