IN运算符提供的操作数过多;操作数:119 dynamodb

ani*_*ako 4 amazon-dynamodb dynamo-local

尝试在dynamodb中使用IN操作,但出现以下错误。有人可以帮我替代解决方案吗?

var params = {

TableName : "table_name",
FilterExpression : "id IN ("+Object.keys(profileIdObject).toString()+ ")",
ExpressionAttributeValues : profileIdObject
Run Code Online (Sandbox Code Playgroud)

};

错误:: {

  "message": "Invalid FilterExpression: The IN operator is provided with too many operands; number of operands: 119",
  "code": "ValidationException",
  "time": "2018-02-13T08:48:02.597Z",
  "statusCode": 400,
  "retryable": false,
  "retryDelay": 25.08276239472692
Run Code Online (Sandbox Code Playgroud)

}

小智 6

根据 dynamodb 文档,IN 比较器的最大操作数数量为 100

因此,您可以分为许多操作,例如:

FilterExpression : "id IN (1,2,3, ....) OR id IN (101,102,103,...) ..."

使用此功能:

let getFilterExp = function (x) {
    let arr = []
    let currentIndex = 0
    let counter = 0
    let max = 99

    arr[currentIndex] = {}

    for (let y in x) {
        if (counter < max) {
            arr[currentIndex][y] = x[y]
            counter++
        }
        else {
            currentIndex++
            arr[currentIndex] = {}
            arr[currentIndex][y] = x[y]
            counter = 0
        }
    }

    let exp = ''
    for (let i = 0; i < arr.length; i++) {
        if (i == 0) {
            exp += "id IN (" + Object.keys(arr[i]).toString() + ")"
        }
        else {
            exp += " OR id IN (" + Object.keys(arr[i]).toString() + ") "
        }
    }

    return exp
}
Run Code Online (Sandbox Code Playgroud)

其中 x 是您的情况下的 profileIdObject

let filterExp = getFilterExp(profileIdObject )
Run Code Online (Sandbox Code Playgroud)


Abr*_*mon 5

根据文档:

IN比较器的最大操作数为100

在这里找到:https : //docs.aws.amazon.com/amazondynamodb/latest/developerguide/Limits.html#limits-expression-parameters

您需要分多个批次执行查询/扫描,在您的情况下,Object.keys(profileIdObject).toString()第一批次为100,第二批次为19。然后合并结果。