openCypher 查詢逾時提示

查詢逾時行為可以透過查詢層級查詢提示 ，依每個查詢進行設定QUERY:TIMEOUTMILLISECONDS。它必須與 USING子句搭配使用。查詢提示接受非負值。

# Using query-level timeout hint 

% curl https://<endpoint>:<port>/opencypher \
  -d "query=USING QUERY:TIMEOUTMILLISECONDS 100 MATCH(n) RETURN n LIMIT 1"

查詢逾時行為將考慮叢集層級逾時和查詢層級逾時的最小值。請參閱以下範例以了解查詢逾時行為。如需叢集層級查詢逾時的詳細資訊，請參閱 neptune_query_timeout。

# Suppose `neptune_query_timeout` is 10000 ms and query-level timeout is set to 100 ms
# It will consider 100 ms as the final timeout 

% curl https://<endpoint>:<port>/opencypher \
  -d "query=USING QUERY:TIMEOUTMILLISECONDS 100 MATCH(n) RETURN n LIMIT 1"

# Suppose `neptune_query_timeout` is 100 ms and query-level timeout is set to 10000 ms
# It will still consider 100 ms as the final timeout 

% curl https://<endpoint>:<port>/opencypher \
  -d "query=USING QUERY:TIMEOUTMILLISECONDS 10000 MATCH(n) RETURN n LIMIT 1"