对于我的 Neo4j 查询，如何将语法从 Cypher 2.0.1 恢复到 Cypher 2.0.0？

Question

我在查询中使用了一系列嵌套的 FOREACH 循环，这些循环在 Neo4j 的多个安装中都能正常运行，并且具有我们用于测试的匹配数据集。随着最近对 Cypher 2.0.1 的更改，我的查询不起作用。

我最初的直觉是替换 /var/lib/neo4j/lib/neo4j-cypher-2.0.0.jar 文件，但我不想把事情搞砸。有什么想法吗？

示例图：http://console.neo4j.org/?id=ktrcwx

这是查询（我强调的“**”表示发生错误的点）：

$ MATCH (total:Recipe)
>     WITH count(DISTINCT total) AS tots, timestamp() AS time
>     MATCH (ia:Ingredient)<-[:HAS_INGREDIENT]-(recab:Recipe)-[recHasB:HAS_INGREDIENT]->(ib:Ingredient)
>       WHERE id(ia)=5167
>       WITH DISTINCT ib AS idB, count(DISTINCT recab) AS recAB , count(DISTINCT recHasB) AS recB, tots, time
>     MATCH (i:Ingredient)<-[:HAS_INGREDIENT]-(r:Recipe)
>       WHERE id(i)=5167
>       WITH [i, count(DISTINCT r.id), idB, recAB, recB, tots, time] AS c
>     FOREACH (row IN c |
>       FOREACH (i1 in **c[0] |**
>         FOREACH (recA in c[1] |
>           FOREACH (i2 in c[2]|
>             FOREACH (recAB in c[3] |
>               FOREACH (recB in c[4] |
>                 FOREACH (totalRec in c[5] |
>                   CREATE (i1:Ingredient )-[pm1:PMI]->(i2: Ingredient)
>                   SET startNode(pm1).pmiTime = c[6], endNode(pm1).pmiTime = c[6], pm1.weight = log( (totalRec*recAB) /(recA*recB) ), pm1.pmiTime= c[6]
>                   CREATE (i1:Ingredient )<-[pm2:PMI]-(i2: Ingredient)
>                   SET startNode(pm2).pmiTime = c[6], endNode(pm2).pmiTime = c[6], pm2.weight = log( (totalRec*recAB) /(recA*recB) ), pm2.pmiTime= c[6]
>                 )
>               )
>             )
>           )
>         )
>       )
>     );

这是错误：

SyntaxException: Type mismatch: expected Collection<T> but was Any (line 10, column 25)"      FOREACH (i1 in c[0] |"

这是运行中的类路径：

Neo4j Server is running at pid 4347
NEO4J_HOME:        /var/lib/neo4j
NEO4J_SERVER_PORT: 7474
NEO4J_INSTANCE:    /var/lib/neo4j
JAVA_HOME:
JAVA_OPTS:         -server -XX:+DisableExplicitGC -Dorg.neo4j.server.properties=conf/neo4j-server.properties -Djava.util.logging.config.file=conf/logging.properties -Dlog4j.configuration=file:conf/log4j.properties -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled
CLASSPATH:         /var/lib/neo4j/lib/concurrentlinkedhashmap-lru-1.3.1.jar:/var/lib/neo4j/lib/geronimo-jta_1.1_spec-1.1.1.jar:/var/lib/neo4j/lib/lucene-core-3.6.2.jar:/var/lib/neo4j/lib/neo4j-cypher-2.0.0.jar:/var/lib/neo4j/lib/neo4j-cypher-commons-2.0.0.jar:/var/lib/neo4j/lib/neo4j-cypher-compiler-1.9-2.0.0.jar:/var/lib/neo4j/lib/neo4j-cypher-compiler-2.0-2.0.0.jar:/var/lib/neo4j/lib/neo4j-graph-algo-2.0.0.jar:/var/lib/neo4j/lib/neo4j-graph-matching-2.0.0.jar:/var/lib/neo4j/lib/neo4j-jmx-2.0.0.jar:/var/lib/neo4j/lib/neo4j-kernel-2.0.0.jar:/var/lib/neo4j/lib/neo4j-lucene-index-2.0.0.jar:/var/lib/neo4j/lib/neo4j-shell-2.0.0.jar:/var/lib/neo4j/lib/neo4j-udc-2.0.0.jar:/var/lib/neo4j/lib/org.apache.servicemix.bundles.jline-0.9.94_1.jar:/var/lib/neo4j/lib/parboiled-core-1.1.6.jar:/var/lib/neo4j/lib/parboiled-scala_2.10-1.1.6.jar:/var/lib/neo4j/lib/scala-library-2.10.3.jar:/var/lib/neo4j/lib/server-api-2.0.0.jar:/var/lib/neo4j/system/lib/asm-3.1.jar:/var/lib/neo4j/system/lib/bcprov-jdk16-140.jar:/var/lib/neo4j/system/lib/commons-beanutils-1.8.0.jar:/var/lib/neo4j/system/lib/commons-beanutils-core-1.8.0.jar:/var/lib/neo4j/system/lib/commons-collections-3.2.1.jar:/var/lib/neo4j/system/lib/commons-compiler-2.6.1.jar:/var/lib/neo4j/system/lib/commons-configuration-1.6.jar:/var/lib/neo4j/system/lib/commons-digester-1.8.1.jar:/var/lib/neo4j/system/lib/commons-io-1.4.jar:/var/lib/neo4j/system/lib/commons-lang-2.4.jar:/var/lib/neo4j/system/lib/commons-logging-1.1.1.jar:/var/lib/neo4j/system/lib/jackson-core-asl-1.9.7.jar:/var/lib/neo4j/system/lib/jackson-jaxrs-1.9.7.jar:/var/lib/neo4j/system/lib/jackson-mapper-asl-1.9.7.jar:/var/lib/neo4j/system/lib/janino-2.6.1.jar:/var/lib/neo4j/system/lib/javax.servlet-3.0.0.v201112011016.jar:/var/lib/neo4j/system/lib/jcl-over-slf4j-1.6.1.jar:/var/lib/neo4j/system/lib/jersey-core-1.9.jar:/var/lib/neo4j/system/lib/jersey-multipart-1.9.jar:/var/lib/neo4j/system/lib/jersey-server-1.9.jar:/var/lib/neo4j/system/lib/jetty-http-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-io-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-security-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-server-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-servlet-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-util-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-webapp-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-xml-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jsr311-api-1.1.2.r612.jar:/var/lib/neo4j/system/lib/logback-access-1.0.9.jar:/var/lib/neo4j/system/lib/logback-classic-1.0.9.jar:/var/lib/neo4j/system/lib/logback-core-1.0.9.jar:/var/lib/neo4j/system/lib/mimepull-1.6.jar:/var/lib/neo4j/system/lib/neo4j-browser-2.0.0.jar:/var/lib/neo4j/system/lib/neo4j-server-2.0.0.jar:/var/lib/neo4j/system/lib/neo4j-server-2.0.0-static-web.jar:/var/lib/neo4j/system/lib/rhino-1.7R3.jar:/var/lib/neo4j/system/lib/rrd4j-2.0.7.jar:/var/lib/neo4j/system/lib/slf4j-api-1.6.2.jar:/var/lib/neo4j/conf/

这是发生故障的类路径：

Neo4j Server is running at pid 1361
NEO4J_HOME:        /var/lib/neo4j
NEO4J_SERVER_PORT: 7474
NEO4J_INSTANCE:    /var/lib/neo4j
JAVA_HOME:
JAVA_OPTS:         -server -XX:+DisableExplicitGC - Dorg.neo4j.server.properties=conf/neo4j-server.properties -Djava.util.logging.config.file=conf/logging.properties -Dlog4j.configuration=file:conf/log4j.properties -XX:+UseConcMarkSweepGC -XX:+CMSClassUnloadingEnabled
CLASSPATH:         /var/lib/neo4j/lib/concurrentlinkedhashmap-lru-1.3.1.jar:/var/lib/neo4j/lib/geronimo-jta_1.1_spec-1.1.1.jar:/var/lib/neo4j/lib/lucene-core-3.6.2.jar:/var/lib/neo4j/lib/neo4j-cypher-2.0.1.jar:/var/lib/neo4j/lib/neo4j-cypher-commons-2.0.1.jar:/var/lib/neo4j/lib/neo4j-cypher-compiler-1.9-2.0.1.jar:/var/lib/neo4j/lib/neo4j-cypher-compiler-2.0-2.0.1.jar:/var/lib/neo4j/lib/neo4j-graph-algo-2.0.1.jar:/var/lib/neo4j/lib/neo4j-graph-matching-2.0.1.jar:/var/lib/neo4j/lib/neo4j-jmx-2.0.1.jar:/var/lib/neo4j/lib/neo4j-kernel-2.0.1.jar:/var/lib/neo4j/lib/neo4j-lucene-index-2.0.1.jar:/var/lib/neo4j/lib/neo4j-shell-2.0.1.jar:/var/lib/neo4j/lib/neo4j-udc-2.0.1.jar:/var/lib/neo4j/lib/org.apache.servicemix.bundles.jline-0.9.94_1.jar:/var/lib/neo4j/lib/parboiled-core-1.1.6.jar:/var/lib/neo4j/lib/parboiled-scala_2.10-1.1.6.jar:/var/lib/neo4j/lib/scala-library-2.10.3.jar:/var/lib/neo4j/lib/server-api-2.0.1.jar:/var/lib/neo4j/system/lib/asm-3.1.jar:/var/lib/neo4j/system/lib/bcprov-jdk16-140.jar:/var/lib/neo4j/system/lib/commons-beanutils-1.8.0.jar:/var/lib/neo4j/system/lib/commons-beanutils-core-1.8.0.jar:/var/lib/neo4j/system/lib/commons-collections-3.2.1.jar:/var/lib/neo4j/system/lib/commons-compiler-2.6.1.jar:/var/lib/neo4j/system/lib/commons-configuration-1.6.jar:/var/lib/neo4j/system/lib/commons-digester-1.8.1.jar:/var/lib/neo4j/system/lib/commons-io-1.4.jar:/var/lib/neo4j/system/lib/commons-lang-2.4.jar:/var/lib/neo4j/system/lib/commons-logging-1.1.1.jar:/var/lib/neo4j/system/lib/jackson-core-asl-1.9.7.jar:/var/lib/neo4j/system/lib/jackson-jaxrs-1.9.7.jar:/var/lib/neo4j/system/lib/jackson-mapper-asl-1.9.7.jar:/var/lib/neo4j/system/lib/janino-2.6.1.jar:/var/lib/neo4j/system/lib/javax.servlet-3.0.0.v201112011016.jar:/var/lib/neo4j/system/lib/jcl-over-slf4j-1.6.1.jar:/var/lib/neo4j/system/lib/jersey-core-1.9.jar:/var/lib/neo4j/system/lib/jersey-multipart-1.9.jar:/var/lib/neo4j/system/lib/jersey-server-1.9.jar:/var/lib/neo4j/system/lib/jetty-http-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-io-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-security-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-server-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-servlet-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-util-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-webapp-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jetty-xml-9.0.5.v20130815.jar:/var/lib/neo4j/system/lib/jsr311-api-1.1.2.r612.jar:/var/lib/neo4j/system/lib/logback-access-1.0.9.jar:/var/lib/neo4j/system/lib/logback-classic-1.0.9.jar:/var/lib/neo4j/system/lib/logback-core-1.0.9.jar:/var/lib/neo4j/system/lib/mimepull-1.6.jar:/var/lib/neo4j/system/lib/neo4j-browser-2.0.1.jar:/var/lib/neo4j/system/lib/neo4j-server-2.0.1.jar:/var/lib/neo4j/system/lib/neo4j-server-2.0.1-static-web.jar:/var/lib/neo4j/system/lib/rhino-1.7R3.jar:/var/lib/neo4j/system/lib/rrd4j-2.0.7.jar:/var/lib/neo4j/system/lib/slf4j-api-1.6.2.jar:/var/lib/neo4j/conf/

关于预期结果的说明： 对于集合中的每一行，查询应该创建 2 个关系：(i1)-[:PMI]->(i2) 和 (i2)-[:PMI]->(i1)。 [:PMI] 关系的权重是 Log() 函数中的数学运算。该图是(:Ingredient) 和(:Recipe) 节点。此查询将在(i1:Ingredient) 和包含(i1) 的配方中出现的每个(i2:Ingredient) 之间创建关系。这使我能够了解成分配对的概率。

Answer 1

您能否将您的非收藏品包装在[ ] 中，看看是否能解决问题？例如：FOREACH(i1 IN [c[0]] |

好的，这是对编译的轻微重写的尝试——如果你可以在 console.neo4j.org 上发布一些示例数据，如果它不起作用：

MATCH (total:Recipe)
WITH count(DISTINCT total) AS tots, timestamp() AS time
MATCH (ia:Ingredient)<-[:HAS_INGREDIENT]-(recab:Recipe)-[recHasB:HAS_INGREDIENT]->(ib:Ingredient)
WHERE id(ia)=5167
WITH DISTINCT ib AS idB, count(DISTINCT recab) AS recAB , count(DISTINCT recHasB) AS recB, tots, time
MATCH (i:Ingredient)<-[:HAS_INGREDIENT]-(r:Recipe)
WHERE id(i)=5167
WITH i, count(DISTINCT r.id) as recA, idB as i2, recAB, recB, tots, time  
CREATE (i)-[pm1:PMI {pmiTime:time, weight:log( (tots*recAB) /(recA*recB) )}]->(i2)
CREATE (i)<-[pm2:PMI {pmiTime:time, weight:log( (tots*recAB) /(recA*recB) )}]-(i2)
SET i.pmiTime = time, pm1.pmiTime = time, i2.pmiTime = time, pm2.pmiTime = time