【发布时间】：2013-09-07 18:37:20
【问题描述】：
以下是我们的按 ID 查找服务的密码：
START n=node:PATIENTS('MEMBER_PLAN_ID:(1 2)') return n
其中 1 2 是传递的 id。当我们传递大约 2000 个 id 时，会发生以下错误：
java.lang.RuntimeException: org.apache.lucene.queryParser.ParseException: Cannot parse 'MEMBER_PLAN_ID:(1 2)': too many boolean clauses
at org.neo4j.index.impl.lucene.IndexType.query(IndexType.java:304)
at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:227)
at org.neo4j.index.impl.lucene.LuceneIndex.query(LuceneIndex.java:238)
at org.neo4j.cypher.internal.spi.gdsimpl.GDSBackedQueryContext$$anon$1.indexQuery(GDSBackedQueryContext.scala:87)
at org.neo4j.cypher.internal.executionplan.builders.IndexQueryBuilder$$anonfun$getNodeGetter$2.apply(IndexQueryBuilder.scala:83)
at org.neo4j.cypher.internal.executionplan.builders.IndexQueryBuilder$$anonfun$getNodeGetter$2.apply(IndexQueryBuilder.scala:81)
at org.neo4j.cypher.internal.pipes.StartPipe$$anonfun$internalCreateResults$1.apply(StartPipe.scala:36)
at org.neo4j.cypher.internal.pipes.StartPipe$$anonfun$internalCreateResults$1.apply(StartPipe.scala:35)
at scala.collection.Iterator$$anon$13.__AW_hasNext(Iterator.scala:371)
at scala.collection.Iterator$$anon$13.hasNext(Iterator.scala)
at org.neo4j.cypher.internal.ClosingIterator$$anonfun$hasNext$1.apply$mcZ$sp(ClosingIterator.scala:36)
at org.neo4j.cypher.internal.ClosingIterator$$anonfun$hasNext$1.apply(ClosingIterator.scala:35)
at org.neo4j.cypher.internal.ClosingIterator$$anonfun$hasNext$1.apply(ClosingIterator.scala:35)
at org.neo4j.cypher.internal.ClosingIterator.failIfThrows(ClosingIterator.scala:86)
at org.neo4j.cypher.internal.ClosingIterator.hasNext(ClosingIterator.scala:35)
at org.neo4j.cypher.PipeExecutionResult.hasNext(PipeExecutionResult.scala:157)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:327)
at scala.collection.convert.Wrappers$IteratorWrapper.hasNext(Wrappers.scala:29)
at org.neo4j.cypher.PipeExecutionResult$$anon$1.hasNext(PipeExecutionResult.scala:73)
at net.ahm.graph.dao.PatientDAO.__AW_findPatients(PatientDAO.java:376)
Caused by: org.apache.lucene.queryParser.ParseException: Cannot parse 'MEMBER_PLAN_ID:(1 2)': too many boolean clauses
at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:221)
at org.neo4j.index.impl.lucene.IndexType.query(IndexType.java:300)
... 38 more
Caused by: org.apache.lucene.search.BooleanQuery$TooManyClauses: maxClauseCount is set to 1024
at org.apache.lucene.search.BooleanQuery.add(BooleanQuery.java:136)
at org.apache.lucene.queryParser.QueryParser.getBooleanQuery(QueryParser.java:958)
at org.apache.lucene.queryParser.QueryParser.getBooleanQuery(QueryParser.java:933)
at org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:1281)
at org.apache.lucene.queryParser.QueryParser.Clause(QueryParser.java:1323)
at org.apache.lucene.queryParser.QueryParser.Query(QueryParser.java:1245)
at org.apache.lucene.queryParser.QueryParser.TopLevelQuery(QueryParser.java:1234)
at org.apache.lucene.queryParser.QueryParser.parse(QueryParser.java:206)
... 39 more
我们在堆栈跟踪中看到：maxClauseCount 设置为 1024
有没有办法在使用 Cypher 时从 Neo4j 配置此限制？
【问题讨论】：
-
这可能令人望而却步。你的用例是什么？
-
一个外部系统根据规则选出一群病人。然后它在 1 次往返中从 neo4j 中查询有关这些患者的某些信息。
-
我认为，如果您不使用基于 Java 的 Cypher，那就更令人望而却步了。
-
我是 Neo4j 的新手。我唯一的要求是在 1 次往返中获取多个患者的信息。我们在旧版 Oracle 服务中有一个 IN sql
标签： java performance lucene neo4j cypher