ios app compile sqlite fts with icu,but it cant get the perfect answer when i input a letter like “z”

Question

In sqlite I:

1. Perform a create virtual MyTable (tokenize =icu ,id text,subject text,abstract text)
2. Then successfully insert info MyT

Answer 1

Try Hai Feng Kao's character tokenizer. It can search prefix, postfix and anything in between. It supports Chinese as well. I don't think you can find any other tokenizers which support arbitrarily substring search.

BTW, it is a shameless self-promotion.

If you want to open a database encoded by character tokenizer in Objective-C, do the following:

#import 
#import "character_tokenizer.h"

FMDatabase* database = [[FMDatabase alloc] initWithPath:@"my_database.db"];
if ([database open]) {
    // add FTS support
    const sqlite3_tokenizer_module *ptr;
    get_character_tokenizer_module(&ptr);
    registerTokenizer(database.sqliteHandle, "character", ptr);
}