Query Dsl Cont'd

• Leaf query clause: an equivalent of where clause in Sql statement for a particular field value

• query_string is using Lucene syntax: id:1

• Compound query clause: an equivalent of and, or, not, and etc. operators in sql statement

• bool represents boolean combinations of other queries, e.g.: must and filter

• must represents a condition that must be matched and will be used for computing score or relevancy of the search result

• filter act as a must condition, but will not contribute to the computation of score or relevancy of document found

• Additional options for bool are: should and must_not