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                            # Query DSL

Elasticsearch提供基于Json的查詢功能，將DSL查詢看做AST樹的話，包含兩種子句類型：?
+ Leaf query clauses：葉子節點的查詢子句，主要用于檢索特定字段的特定值，例如match、term、range查詢。這些子句可以嵌套自己。?
+ Compound query clauses：復合子句，用于組合多個葉子查詢子句，形成邏輯，例如bool或者dis_max查詢，或者行為修改（例如constant_score查詢）?
查詢子句在query上下文與filter上下文表現有所區別。
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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