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Jul 21, 2025
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fix-zrevrangebylex #2636

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23 changes: 13 additions & 10 deletions src/StackExchange.Redis/RedisDatabase.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -3445,12 +3445,15 @@ private Message GetSortedSetMultiPopMessage(RedisKey[] keys, Order order, long c
return tran;
}

private static RedisValue GetLexRange(RedisValue value, Exclude exclude, bool isStart)
private static RedisValue GetLexRange(RedisValue value, Exclude exclude, bool isStart, Order order)
{
if (value.IsNull)
{
return isStart ? RedisLiterals.MinusSymbol : RedisLiterals.PlusSymbol;
if (order == Order.Ascending) return isStart ? RedisLiterals.MinusSymbol : RedisLiterals.PlusSymbol;

return isStart ? RedisLiterals.PlusSymbol : RedisLiterals.MinusSymbol; // 24.01.2024: when descending order: Plus and Minus have to be reversed
}

byte[] orig = value!;

byte[] result = new byte[orig.Length + 1];
Expand Down Expand Up @@ -4553,9 +4556,9 @@ private Message GetStringSetAndGetMessage(
return new ScanEnumerable<T>(this, server, key, pattern, pageSize, cursor, pageOffset, flags, command, processor);
}

private Message GetLexMessage(RedisCommand command, RedisKey key, RedisValue min, RedisValue max, Exclude exclude, long skip, long take, CommandFlags flags)
private Message GetLexMessage(RedisCommand command, RedisKey key, RedisValue min, RedisValue max, Exclude exclude, long skip, long take, CommandFlags flags, Order order)
{
RedisValue start = GetLexRange(min, exclude, true), stop = GetLexRange(max, exclude, false);
RedisValue start = GetLexRange(min, exclude, true, order), stop = GetLexRange(max, exclude, false, order);

if (skip == 0 && take == -1)
return Message.Create(Database, flags, command, key, start, stop);
Expand All @@ -4565,7 +4568,7 @@ private Message GetLexMessage(RedisCommand command, RedisKey key, RedisValue min

public long SortedSetLengthByValue(RedisKey key, RedisValue min, RedisValue max, Exclude exclude = Exclude.None, CommandFlags flags = CommandFlags.None)
{
var msg = GetLexMessage(RedisCommand.ZLEXCOUNT, key, min, max, exclude, 0, -1, flags);
var msg = GetLexMessage(RedisCommand.ZLEXCOUNT, key, min, max, exclude, 0, -1, flags, Order.Ascending);
return ExecuteSync(msg, ResultProcessor.Int64);
}

Expand All @@ -4591,19 +4594,19 @@ public RedisValue[] SortedSetRangeByValue(RedisKey key, RedisValue min = default
Exclude exclude = Exclude.None, Order order = Order.Ascending, long skip = 0, long take = -1, CommandFlags flags = CommandFlags.None)
{
ReverseLimits(order, ref exclude, ref min, ref max);
var msg = GetLexMessage(order == Order.Ascending ? RedisCommand.ZRANGEBYLEX : RedisCommand.ZREVRANGEBYLEX, key, min, max, exclude, skip, take, flags);
var msg = GetLexMessage(order == Order.Ascending ? RedisCommand.ZRANGEBYLEX : RedisCommand.ZREVRANGEBYLEX, key, min, max, exclude, skip, take, flags, order);
return ExecuteSync(msg, ResultProcessor.RedisValueArray, defaultValue: Array.Empty<RedisValue>());
}

public long SortedSetRemoveRangeByValue(RedisKey key, RedisValue min, RedisValue max, Exclude exclude = Exclude.None, CommandFlags flags = CommandFlags.None)
{
var msg = GetLexMessage(RedisCommand.ZREMRANGEBYLEX, key, min, max, exclude, 0, -1, flags);
var msg = GetLexMessage(RedisCommand.ZREMRANGEBYLEX, key, min, max, exclude, 0, -1, flags, Order.Ascending);
return ExecuteSync(msg, ResultProcessor.Int64);
}

public Task<long> SortedSetLengthByValueAsync(RedisKey key, RedisValue min, RedisValue max, Exclude exclude = Exclude.None, CommandFlags flags = CommandFlags.None)
{
var msg = GetLexMessage(RedisCommand.ZLEXCOUNT, key, min, max, exclude, 0, -1, flags);
var msg = GetLexMessage(RedisCommand.ZLEXCOUNT, key, min, max, exclude, 0, -1, flags, Order.Ascending);
return ExecuteAsync(msg, ResultProcessor.Int64);
}

Expand All @@ -4614,13 +4617,13 @@ public Task<RedisValue[]> SortedSetRangeByValueAsync(RedisKey key, RedisValue mi
Exclude exclude = Exclude.None, Order order = Order.Ascending, long skip = 0, long take = -1, CommandFlags flags = CommandFlags.None)
{
ReverseLimits(order, ref exclude, ref min, ref max);
var msg = GetLexMessage(order == Order.Ascending ? RedisCommand.ZRANGEBYLEX : RedisCommand.ZREVRANGEBYLEX, key, min, max, exclude, skip, take, flags);
var msg = GetLexMessage(order == Order.Ascending ? RedisCommand.ZRANGEBYLEX : RedisCommand.ZREVRANGEBYLEX, key, min, max, exclude, skip, take, flags, order);
return ExecuteAsync(msg, ResultProcessor.RedisValueArray, defaultValue: Array.Empty<RedisValue>());
}

public Task<long> SortedSetRemoveRangeByValueAsync(RedisKey key, RedisValue min, RedisValue max, Exclude exclude = Exclude.None, CommandFlags flags = CommandFlags.None)
{
var msg = GetLexMessage(RedisCommand.ZREMRANGEBYLEX, key, min, max, exclude, 0, -1, flags);
var msg = GetLexMessage(RedisCommand.ZREMRANGEBYLEX, key, min, max, exclude, 0, -1, flags, Order.Ascending);
return ExecuteAsync(msg, ResultProcessor.Int64);
}

Expand Down