Question

我正在创建一个聊天机器人，该机器人从BigQuery检索数据，但是Dialogflow中的数据类型存在问题：

Dialogflow参数为：评分（@ sys.number-int），国家（字符串），部门（字符串）

当我执行以下代码时，bigquery似乎正在以字符串形式接收Rating（Country和Department是在BigQuery中正常工作的字符串），所以这就是为什么我尝试了CAST但没有运气的原因。

有人可以帮我从Dialogflow将INT64变量传递给BigQuery吗？

 function buyAgainPredictor(agent) {
    const OPTIONS = {
                query: 'WITH pred_table AS (SELECT CAST(`request.body.queryResult.outputContexts[0].parameters.Rating´ AS INT64) as Rating, "request.body.queryResult.outputContexts[0].parameters.Department" as Department,  "request.body.queryResult.outputContexts[0].parameters.Country" as Country)' +
                'SELECT cast(predicted_label as INT64) as predicted_label ' +
                'FROM ML.PREDICT(MODEL Customer_feedback.recommend_model,  TABLE pred_table)',
                timeoutMs: 10000,
                useLegacySql: false,
                queryParameters: {}

DialogFlow parameter definition

Answer 1

您没有替换字符串中的变量。在query中尝试：

`WITH pred_table AS (
  SELECT ${request.body.queryResult.outputContexts[0].parameters.Rating} as Rating,
     "${request.body.queryResult.outputContexts[0].parameters.Department}" as Department,
     "${request.body.queryResult.outputContexts[0].parameters.Country}" as Country)

SELECT cast(predicted_label as INT64) as predicted_label 
     FROM ML.PREDICT(MODEL Customer_feedback.recommend_model, TABLE pred_table)`

通常，您不想在SQL查询（SQL injection）中使用用户输入，请查看parameterized queries上的文档。考虑到这一点，您可以尝试以下方法：

const OPTIONS = {
    query: `WITH pred_table AS (
                SELECT @rating as Rating,
                       @department as Department,  
                       @country as Country)

            SELECT cast(predicted_label as INT64) as predicted_label
                 FROM ML.PREDICT(MODEL Customer_feedback.recommend_model, TABLE pred_table)`,

    timeoutMs: 10000,
    useLegacySql: false,
    queryParameters: {
        rating: parameters.Rating,
        department: parameters.Department,
        country: parameters.Country
    }
}

与BigQuery进行Dialogflow集成-将整数参数传递给BQ

1 个答案: