我已将我的数据存储在 AreangoDB 中的给定格式中,我在 DSP 中的集合名称:
"data": {
"1": [ {"db_name": "DSP"}, {"rel": "2"} ],
"2": [ {"rel_name": "DataSource"}, {"tuple": "201"}, {"tuple": "202"}, {"tuple": "203"} ],
"201": [ {"src_id": "Pos201510070"}, {"src_name": "Postgres"}, {"password": "root"}, {"host": "localhost"}, {"created_date": "20151007"}, {"user_name": "postgres"}, {"src_type": "Structured"}, {"db_name": "postgres"}, {"port": "None"} ],
"202": [ {"src_id": "pos201510060"}, {"src_name": "Postgres"},{"password": "root"}, {"host": "localhost"}, {"created_date": "20151006"}, {"user_name": "postgres"}, {"src_type": "Structured"}, {"db_name": "DSP"}, {"port": "5432"} ],
"203": [ {"src_id": "pos201510060"}, {"src_name": "Postgres"}, {"password": "root"}, {"host": "localhost"}, {"created_date": "20151006"}, {"user_name": "postgres"},{"src_type": "Structured"},{"db_name": "maindb"},{"port": "5432"} ]
}
我正在使用以下格式的上述数据执行查询:
FOR p IN NestedDSP
LET attributes = ATTRIBUTES(p)
FOR attribute IN attributes
LET key = ATTRIBUTES(attribute)[0]
LET value = attribute[key]
RETURN { subject: attribute, predicate: key, object: value }
当我向 ArangoDB 提交查询时,它返回的响应为:
Warnings:
[1542], 'invalid argument type in call to function 'ATTRIBUTES()''
[1542], 'invalid argument type in call to function 'ATTRIBUTES()''
[1542], 'invalid argument type in call to function 'ATTRIBUTES()''
[1542], 'invalid argument type in call to function 'ATTRIBUTES()''
Result:
[
{
"subject": "data",
"predicate": null,
"object": null
},
{
"subject": "_id",
"predicate": null,
"object": null
},
{
"subject": "_rev",
"predicate": null,
"object": null
},
{
"subject": "_key",
"predicate": null,
"object": null
}
]
请告诉我这个查询有什么问题,为什么答案像上面那样。我在 ArangoDB-2.7.3-win64 工作。
谢谢