I have written elasticsearch query using java api in which status count is fetched per day.
Code:
SearchResponse responseOutput = client.prepareSearch(ConstantsValue.indexName)
.setTypes(ConstantsValue._Type)
.setFetchSource(new String[]{"STATUS", "DTCREATED"}, null)
.setQuery(
QueryBuilders.filteredQuery(QueryBuilders.matchAllQuery(),
FilterBuilders.rangeFilter("DTCREATED").from(fromDate).to(toDate))).
addAggregation(AggregationBuilders.terms("STATUS_AGG").field("STATUS")
.subAggregation(AggregationBuilders.dateHistogram("DATE_AGG").field("DTCREATED").interval(DateHistogram.Interval.DAY).format("yyyy-MM-dd"))
)
.addSort("DTCREATED", SortOrder.ASC)
.get();
I am trying to sort data by DTCREATED field which contains both date and time but query does not provide sorted result. I can't find what I am missing in query. Any help ?
What if you have your .addSort as below:
.addSort(SortBuilders.fieldSort("DTCREATED").order(SortOrder.ASC))
Few samples here might help you.
Related
I am new in writing aggregate queries in Mongo DB + Spring
Scenario: We are storing birthDate(Jjava.uti.Date) in mongo db which got stored as ISO date. Now we are trying to look for the records which are matching with the dayOfMonth and Month only. So that we can corresponding object from the list.
I had gone through few solutions and here is the way I am trying but this is giving me a null set of records.
Aggregation agg = Aggregation.newAggregation(
Aggregation.project().andExpression("dayOfMonth(birthDate)").as("day").andExpression("month(birthDate)")
.as("month"),
Aggregation.group("day", "month"));
AggregationResults<Employee> groupResults = mongoTemplate.aggregate(agg, Employee.class, Employee.class);
I also tried applying a a query with the help of Criteria but this is also giving me a Employee object which all null content.
Aggregation agg = Aggregation.newAggregation(Aggregation.match(Criteria.where("birthDate").lte(new Date())), Aggregation.project().andExpression("dayOfMonth(birthDate)").as("day").andExpression("month(birthDate)")
.as("month"),
Aggregation.group("day", "month"));
AggregationResults<Employee> groupResults = mongoTemplate.aggregate(agg, Employee.class, Employee.class);
I must missing some important thing which is giving me these null data.
Additional Info: Employee object has only birthDate(Date) and email(String) in it
Please try to specify the fields to be included in the $project stage.
project("birthDate", "...").andExpression("...
The _id field is, by default, included in the output documents. To include any other fields from the input documents in the output documents, you must explicitly specify the inclusion in $project.
see: MongoDBReference - $project (aggregation)
I've created DATAMONGO-2200 to add an option to project directly onto the fields of a given domain type via something like project(Employee.class).
I have some custom data(let's call Camera) in my ElasticSearch, the data showed in Kibana is like
And I tried to delete data by Query according to the accepted answer in this article ElasticSearch Delete by Query, my code is like
String query = "{\"Name\":\"test Added into Es\"}";
DeleteByQuery delete = new DeleteByQuery.Builder(query).addIndex(this._IndexName).addType(this._TypeName).build();
JestResult deleteResult = this._JestClient.execute(delete);
And the result is 404 Not Found.
Its obvious that there exist one Camera data in ElasticSearch which Name match the query, so I believe the 404 is caused by other reason.
Did I do anything wrong? Should I change the query string?
The query needs to be a real query, not a partial document
Try with this instead
String query = "{\"query\": { \"match\": {\"Name\":\"test Added into Es\"}}}";
for example i want to find age between 16 and 25 from a collection in mongoDB.
my query is..
Query query = new Query(Criteria.where("visibility").is(1)
.and("type").is("guide").and("age").gte(16).and("age").lte(25));
but it is giving exception. reason is mongo template do not support lte() and gte() with same column. so how can i handle it ? is their any solution ?
Try not to include an extra and("age") part in your criteria. What you need is this:
Query query = new Query(Criteria.where("visibility").is(1)
.and("type").is("guide").and("age").gte(16).lte(25));
Im using 3.6.2 lucene and I try to write query which will select all docs.
Here's some of my code:
searchString = "content:*";
query = parser.parse(QueryParser.escape(searchString));
indexSearcher.search(query, null, collector);
But this request returns only about 25% of docs, I cant get why and how to make such query.
UPDATE
*:* also didn't select all docs, but replacing query with new MatchAllDocsQuery() helped, thanks.
Use MatchAllDocsQuery. It's string representation is *:*.
I am using MongoTemplate for my DB operations. Now i want to fetch the maximum fields values from the selected result. Can someone guide me how i write the query so that when i pass the query to find method it will return me the desired maximum fields of document . Thanks in advance
Regards
You can find "the object with the maximum field value" in spring-data-mongodb. Mongo will optimize sort/limit combinations IF the sort field is indexed (or the #Id field). Otherwise it is still pretty good because it will use a top-k algorithm and avoid the global sort (mongodb sort doc). This is from Mkyong's example but I do the sort first and set the limit to one second.
Query query = new Query();
query.with(new Sort(Sort.Direction.DESC, "idField"));
query.limit(1);
MyObject maxObject = mongoTemplate.findOne(query, MyObject.class);