我是OData服务的新手,我编写了一个查询来检索带有空值的特定字段,我在OData中构建了这个查询,并将它传递给弹性搜索来检索data.But,查询似乎不起作用。
The query is as follows:
$filter=assignedToEM eq null.
I have also tried giving as: $filter=assignedToEM eq 'null'
The query has been built as :
{
"from" : 0,
"size" : 15,
"query":