计算查询结果数量

在创建导出任务之前，您可以使用 matters.count 方法统计来自 Gmail 或网上论坛查询的邮件数。根据此信息，您可以优化查询过滤条件，以返回更多或更少的结果。

如需使用保险柜资源，该帐号必须具有所需的保险柜权限和对该诉讼或调查的访问权限。要访问诉讼或调查，帐号必须创建了诉讼或调查、与该诉讼或调查共享，或者拥有查看所有诉讼或调查权限。

以下示例展示了如何计算对符合以下条件的邮件的查询返回的结果数：

• 归账号 email1 和 email2 所有的消息。
• 排除邮件草稿。
• 条信息已发送至 [e-mail]。

Java

public Long count(Vault client, String matterId) {
  AccountInfo emailsToSearch = new AccountInfo().setEmails(ImmutableList.of("email1", "email2"));
  MailOptions mailQueryOptions = new MailOptions().setExcludeDrafts(true);
  String queryTerms = "to:[e-mail]";
  Query query =
    new Query()
      .setCorpus("MAIL")
      .setDataScope("ALL_DATA")
      .setSearchMethod("ACCOUNT")
      .setAccountInfo(emailsToSearch)
      .setTerms(queryTerms);
  CountArtifactsRequest request = new CountArtifactsRequest().setQuery(query);
  Operation operation = client.matters().count(matterId, request).execute();

  while(!operation.getDone()) {
    sleep(2000);
    operation = service.operations().get(operation.getName()).execute();
  }
  if(operation.getResponse() != null) {
    return Long.parseLong(operation.getResponse.get("total_count").toString());
  }
  return -1;
}
 

Python

def count(service, matter_id):
  emails_to_search = ['email1', 'email2']
  mail_query_options = {'excludeDrafts': True}
  query_terms = 'to:[e-mail]'
  mail_query = {
    'corpus': 'MAIL',
    'dataScope': 'ALL_DATA',
    'searchMethod': 'ACCOUNT',
    'accountInfo': {
        'emails': emails_to_search
    },
    'terms': query_terms,
    'mailOptions': mail_query_options,
  }
  request = {
    'query': mail_query
  }
  operation = service.matters().count(matterId=matter_id, body=request).execute()

  while not operation.getDone():
    time.sleep(2)
    operation = service.operations().get(name=operation.getName()).execute()

  if operation.getResponse() is None:
    return -1

  return operation.getResponse()["total_count"]