Question

是否可以查询缓存并在where条件下限制密钥？以下示例已简化：

using (var ignite = Ignition.Start())
{
    var cache = ignite.GetOrCreateCache<int, string>(new CacheConfiguration("test-cache", typeof(string)));

    cache.Put(1, "abc");
    cache.Put(2, "abc2");

    // The next line works
    var resultOnValue = cache.AsCacheQueryable().Where(m => m.Value.EndsWith("2")).ToArray();
    // The next line throws an exception
    var resultOnKey = cache.AsCacheQueryable().Where(m => m.Key > 1).ToArray();
}

javax.cache。 CacheException ：无法远程运行地图查询。 at org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.query（GridReduceQueryExecutor.java:748）在org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing $ 8.iterator（IgniteH2Indexing.java:1212）在org.apache.ignite.internal.processors.cache.QueryCursorImpl.iterator（QueryCursorImpl.java:95）在org.apache.ignite.internal.processors.platform.cache.query.PlatformAbstractQueryCursor.processInLongOutLong（PlatformAbstractQueryCursor.java:147）在org.apache.ignite.internal.processors.platform.PlatformTargetProxyImpl.inLongOutLong（PlatformTargetProxyImpl.java:55）引发者：javax.cache.CacheException：无法在节点上执行映射查询：5917e973-9eb8-4ae6-8dc7-69788d29c518，类org.apache.ignite.IgniteCheckedException：无法执行SQL查询。在org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.fail（GridReduceQueryExecutor.java:274） at org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.onFail（GridReduceQueryExecutor.java:264）在org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.onMessage(GridReduceQueryExecutor.java:243） at org.apache.ignite.internal.processors.query.h2.twostep.GridMapQueryExecutor.sendError（GridMapQueryExecutor.java:854） at org.apache.ignite.internal.processors.query.h2.twostep.GridMapQueryExecutor.onQueryRequest0（GridMapQueryExecutor.java:731） at org.apache.ignite.internal.processors.query.h2.twostep.GridMapQueryExecutor.onQueryRequest（GridMapQueryExecutor.java:516） at org.apache.ignite.internal.processors.query.h2.twostep.GridMapQueryExecutor.onMessage（GridMapQueryExecutor.java:214）在org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor $ 1.applyx（GridReduceQueryExecutor.java:153）在org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor $ 1.applyx（GridReduceQueryExecutor.java:151）在org.apache.ignite.internal.util.lang.IgniteInClosure2X.apply（IgniteInClosure2X.java:38）在org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.send（IgniteH2Indexing.java:2191）在org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.send（GridReduceQueryExecutor.java:1420）在org.apache.ignite.internal.processors.query.h2.twostep.GridReduceQueryExecutor.query（GridReduceQueryExecutor.java:733） ......还有4个

Answer 1

解决方案：使用QueryEntity并定义密钥和值的类型。

var cache = ignite.GetOrCreateCache<int, string>
    (new CacheConfiguration("test-cache", 
        new QueryEntity(typeof(int), typeof(string))));

Apache.Ignite.LINQ如何查询密钥

1 个答案: