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使用和/或多个过滤器的TinkerTop问题

gremlin-server tinkerpop3 gremlin

Srinath Ganesh · 技术社区 · 7 年前

我过滤了多个属性并获取了一个节点,所以如果有多个 filter 加入 and 和 or 。2工作正常,但从3号开始似乎就崩溃了。

下面是错误的简化演示。

用 滤波器

gremlin> g.V().filter(has("name", "marko"))
==>v[1]

gremlin> g.V().filter(has("name", "marko")).and().filter(has("name", "marko"))
==>v[1]

gremlin> g.V().filter(has("name", "marko")).and().filter(has("name", "marko")).and().filter(has("name", "marko"))
java.util.ConcurrentModificationException
Type ':help' or ':h' for help.
Display stack trace? [yN]

没有 滤波器

gremlin> g.V().has("name", "marko")
==>v[1]

gremlin> g.V().has("name", "marko").and().has("name", "marko")
==>v[1]

gremlin> g.V().has("name", "marko").and().has("name", "marko").and().has("name", "marko")
java.util.ConcurrentModificationException
Type ':help' or ':h' for help.
Display stack trace? [yN]

dummy-name 是不存在的东西 。仍然因另一个错误崩溃

gremlin> g.V().hasLabel("dummy-name").filter(has("name", "a").or().has("name", "b").or().has("name", "c"))
    java.lang.ArrayIndexOutOfBoundsException
    Type ':help' or ':h' for help.
    Display stack trace? [yN]y
    java.lang.ArrayIndexOutOfBoundsException

连接NEO4J并使用时 滤波器 它把我扔了

test_gremlin.py", line 49, in execut_final_query
    results = future_results.result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 432, in result
    return self.__get_result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/home/admin-12/.local/lib/python3.6/site-packages/gremlin_python/driver/resultset.py", line 81, in cb
    f.result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 425, in result
    return self.__get_result()
  File "/usr/lib/python3.6/concurrent/futures/_base.py", line 384, in __get_result
    raise self._exception
  File "/usr/lib/python3.6/concurrent/futures/thread.py", line 56, in run
    result = self.fn(*self.args, **self.kwargs)
  File "/home/admin-12/.local/lib/python3.6/site-packages/gremlin_python/driver/connection.py", line 77, in _receive
    self._protocol.data_received(data, self._results)
  File "/home/admin-12/.local/lib/python3.6/site-packages/gremlin_python/driver/protocol.py", line 106, in data_received
    "{0}: {1}".format(status_code, data["status"]["message"]))
gremlin_python.driver.protocol.GremlinServerError: 597: None

我写错了问题吗?或者这是个虫子?

版本:gremlin 3.3.1

1 回复 | 直到 7 年前

stephen mallette 7 年前

我不知道为什么是多重的 and() 虽然我认为情况不可能立即生效,但我认为他们应该这样做,所以我在JIRA中为此提出了一个问题: TINKERPOP-2029

但是,这确实有效:

gremlin> g.V().and(filter(has("name", "marko")), filter(has("name", "marko")), filter(has("name", "marko")))
==>v[1]

或者更简单地说:

gremlin> g.V().and(has("name", "marko"), has("name", "marko"), has("name", "marko"))
==>v[1]

在你对你写的你真正想做的问题的评论中 a 和 b 或 c 和 d -这种方法似乎是可行的:

gremlin> g.V().or(and(has('name','marko'),has('age',29)),and(has('name','josh'),has('age',32)))
==>v[1]
==>v[4]

或者在这种情况下,更简单地说:

gremlin> g.V().or(has('name','marko').has('age',29),has('name','josh').has('age',32))
==>v[1]
==>v[4]