参考:DocumentDB SQL with ARRAY_CONTAINS
问题:对下面发生的事情是否有更好,更有效的查询?
在上面的参考问题中,编写了UDF以检查数组中的对象是否与传入的字符串匹配。在此变体中,我将一个字符串数组传递给UDF。
现在我有一个有效的 O(N ^ 2)版本,我希望CosmosDB可以使用更有效的解决方案。
function ScopesContainsNames(scopes, names){
var s, _i,_j, _ilen, _jLen;
for (_i = 0, _ilen = scopes.length; _i < _ilen; _i++) {
for (_j = 0, _jLen = names.length; _j < _jLen; _j++) {
s = scopes[_i];
n = names[_j];
if (s.name === n) {
return true;
}
}
}
return false;
}
我的查询内容如下。
SELECT * FROM c WHERE udf.ScopesContainsNames(c.scopes, ["apples", "strawberries", "bananas"])
以下是我的文档的示例:
{
"scopes": [
{
"name": "apples",
"displayName": "3048b61e-06d8-4dbf-a4ab-d4c2ba0a8943/a"
},
{
"name": "bananas",
"displayName": "3048b61e-06d8-4dbf-a4ab-d4c2ba0a8943/a"
}
],
"enabled": true,
"name": "dc1e4c12-95c1-4b7f-bf27-f60f0c29bf52/a",
"displayName": "218aea3d-4492-447e-93be-2d3646802ac6/a",
"description": "4aa62367-7421-4fb6-88c7-2699c9c309dd/a",
"userClaims": [
"98988d5b-38b5-400c-aecf-da57d2b66433/a"
],
"properties": {
"437d7bab-a4fb-4b1d-b0b9-f5111d01882a/a": "863defc1-c177-4ba5-b699-15f4fee78ea5/a"
},
"id": "677d4a49-a46c-4613-b3f6-f390ab0d013a",
"_rid": "q6I9AOf180hJAAAAAAAAAA==",
"_self": "dbs/q6I9AA==/colls/q6I9AOf180g=/docs/q6I9AOf180hJAAAAAAAAAA==/",
"_etag": "\"00000000-0000-0000-1ede-f2bc622201d5\"",
"_attachments": "attachments/",
"_ts": 1560097098
}