conditionally query for fields in elasticsearch - elasticsearch

Question

I m new to Elasticsearch and before posting this question I have googled for help but not understanding how to write the query which i wanted to write.
My problem is I have few bunch of documents which i want to query, few of those documents has field "DueDate" and few of those has "PlannedCompletionDate" but not both exist in a single document. So I want to write a query which should conditionally query for a field from documents and return all documents.
For example below I m proving sample documents of each type and my query should return results from both the documents, I need to write query which should check for field existence and return the document
"_source": {
...
"plannedCompleteDate": "2019-06-30T00:00:00.000Z",
...
}
"_source": {
...
"dueDate": "2019-07-26T07:00:00.000Z",
...
}

Answer 1

You can use range query with the combination of the boolean query to achieve your use case.
Adding a working example with index mapping, data, search query, and search result
Index Mapping:
{
"mappings": {
"properties": {
"plannedCompleteDate": {
"type": "date",
"format": "yyyy-MM-dd"
},
"dueDate": {
"type": "date",
"format": "yyyy-MM-dd"
}
}
}
}
Index Data:
{
"plannedCompleteDate": "2019-05-30"
}
{
"plannedCompleteDate": "2020-06-30"
}
{
"dueDate": "2020-05-30"
}
Search Query:
{
"query": {
"bool": {
"should": [
{
"range": {
"plannedCompleteDate": {
"gte": "2020-01-01",
"lte": "2020-12-31"
}
}
},
{
"range": {
"dueDate": {
"gte": "2020-01-01",
"lte": "2020-12-31"
}
}
}
]
}
}
}
Search Result:
"hits": [
{
"_index": "65808850",
"_type": "_doc",
"_id": "1",
"_score": 1.0,
"_source": {
"plannedCompleteDate": "2020-06-30"
}
},
{
"_index": "65808850",
"_type": "_doc",
"_id": "2",
"_score": 1.0,
"_source": {
"dueDate": "2020-05-30"
}
}
]