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一個VIEW我試圖創建使用以下語法上的Apache點燃觀點：無法創建Apache中的Ignite
emplCache.query(new SqlFieldsQuery(
"CREATE VIEW EmployeeCopy AS (SELECT * FROM Employee);")).getAll();
（假定Employee表可在有數據）。 當此行得到執行，我得到以下異常：
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
我看到變量「twoStepQry」是類IgniteH2Indexing.java的1343線空。我無法理解我是否錯過了一些東西。
我正在使用apache-ignite-2.1.0。
另外，如果我創建一個VIEW，它是如何在內部工作的？它是否鎖定在緩存中的條目中，還是將其複製到其他緩存中？