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一个VIEW我试图创建使用以下语法上的Apache点燃观点：无法创建Apache中的Ignite
emplCache.query(new SqlFieldsQuery(
"CREATE VIEW EmployeeCopy AS (SELECT * FROM Employee);")).getAll();
（假定Employee表可在有数据）。 当此行得到执行，我得到以下异常：
javax.cache.CacheException: class org.apache.ignite.IgniteCheckedException: null
at org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:1823)
at org.apache.ignite.internal.processors.cache.IgniteCacheProxy.query(IgniteCacheProxy.java:795)
at org.apache.ignite.internal.processors.cache.IgniteCacheProxy.query(IgniteCacheProxy.java:765)
at com.demo.ignite.test1.EmployeeQuery2.createCopyTable(EmployeeQuery2.java:71)
at com.demo.ignite.test1.EmployeeQuery2.main(EmployeeQuery2.java:55)
Caused by: class org.apache.ignite.IgniteCheckedException: null
at org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2316)
at org.apache.ignite.internal.processors.query.GridQueryProcessor.querySqlFields(GridQueryProcessor.java:1820)
... 4 more
Caused by: java.lang.NullPointerException
at org.apache.ignite.internal.processors.query.h2.IgniteH2Indexing.queryDistributedSqlFields(IgniteH2Indexing.java:1343)
at org.apache.ignite.internal.processors.query.GridQueryProcessor$5.applyx(GridQueryProcessor.java:1815)
at org.apache.ignite.internal.processors.query.GridQueryProcessor$5.applyx(GridQueryProcessor.java:1813)
at org.apache.ignite.internal.util.lang.IgniteOutClosureX.apply(IgniteOutClosureX.java:36)
at org.apache.ignite.internal.processors.query.GridQueryProcessor.executeQuery(GridQueryProcessor.java:2293)
... 5 more
我看到变量“twoStepQry”是类IgniteH2Indexing.java的1343线空。我无法理解我是否错过了一些东西。
我正在使用apache-ignite-2.1.0。
另外，如果我创建一个VIEW，它是如何在内部工作的？它是否锁定在缓存中的条目中，还是将其复制到其他缓存中？