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Es uses collapsebuilder to de duplicate and return only a certain field
2022-07-05 01:26:00 【talen_ hx296】
duplicate removal
SearchRequest searchRequest = new SearchRequest(esIndices2.toArray(new String[esIndices2.size()]));
// Build search criteria
SearchSourceBuilder sourceBuilder = new SearchSourceBuilder();
// Specify the de duplication field
CollapseBuilder collapseBuilder = new CollapseBuilder("userName.keyword");
searchRequest.source(sourceBuilder.query(boolBuilder).collapse(collapseBuilder).trackTotalHits(true));
Specified field
earchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
searchSourceBuilder.fetchSource("userName", null)
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