Does MemoryCache GetKeysByPattern behave differently than Redis?

kev_rm · November 24, 2018, 2:43pm

Keys:
1:2:3
1:3:4
1:2:41

Search By Pattern “1:*:4”

Memory Cache returns last two. That is unexpected because if you do redis KEYS you get only the second one.

Should memory cache append a “+$” to regex?

mythz · November 25, 2018, 1:06am

GetKeysByPattern uses ScanAllKeys which uses Redis’s SCAN command.

github.com

ServiceStack/ServiceStack.Redis/blob/e177a48782a0b4cfba00f27093d3b5b3848d216c/src/ServiceStack.Redis/RedisClient.cs#L974


    var keys = Keys(pattern).ToStringArray();
    if (keys.Length > 0)
        Del(keys);
}


public void RemoveByRegex(string pattern)
{
    RemoveByPattern(pattern.Replace(".*", "*").Replace(".+", "?"));
}


public IEnumerable<string> ScanAllKeys(string pattern = null, int pageSize = 1000)
{
    var ret = new ScanResult();
    while (true)
    {
        ret = pattern != null
            ? base.Scan(ret.Cursor, pageSize, match: pattern)
            : base.Scan(ret.Cursor, pageSize);


        foreach (var key in ret.Results)
        {