如何在node.js环境中将查询语句传递给bigquery

Question

在大查询期间，SQL语句中函数的参数我想通过将其作为@变量名插入来更新sql语句的结果。但是，没有方法支持node.js。

对于Python，有类似以下示例的方法。您可以使用函数的参数作为@变量名。

query = "" "
SELECT word, word_count
FROM `bigquery-public-data.samples.shakespeare`
WHERE corpus = @ corpus
AND word_count> = @min_word_count
ORDER BY word_count DESC;"" "
query_params = [
bigquery.ScalarQueryParameter ('corpus', 'STRING', 'romeoandjuliet'),
bigquery.ScalarQueryParameter ('min_word_count', 'INT64', 250)]
job_config = bigquery.QueryJobConfig ()
job_config.query_parameters = query_params

相关文档： https://cloud.google.com/bigquery/docs/parameterized-queries#bigquery-query-params-python

我想请教一下。

Answer 1

当您使用选项中的 params 键传递参数化查询时，BigQuery node.js 客户端支持参数化查询。刚刚更新了文档以显示这一点。希望这可以帮助！

例子：

const sqlQuery = `SELECT word, word_count
      FROM \`bigquery-public-data.samples.shakespeare\`
      WHERE corpus = @corpus
      AND word_count >= @min_word_count
      ORDER BY word_count DESC`;

const options = {
  query: sqlQuery,
  // Location must match that of the dataset(s) referenced in the query.
  location: 'US',
  params: {corpus: 'romeoandjuliet', min_word_count: 250},
};

// Run the query
const [rows] = await bigquery.query(options);