完全匹配查询

执行简单的精确匹配查询

精确匹配查询允许您选择字段与特定值匹配的所有文档。

您可以对多种字段类型使用完全匹配查询。查询语法因类型而异。

本文中的示例使用具有以下字段的架构：

字段名称	字段类型
`description`	`TEXT`
`condition`	`TAG`
`price`	`NUMERIC`

您可以在快速入门指南中找到有关创建索引和加载演示数据的更多详细信息。

数值字段

要对数值字段执行完全匹配查询，您需要构造具有相同 start 和 end 值的范围查询：

FT.SEARCH index "@field:[value value]"

or

FT.SEARCH index "@field:[value]" DIALECT 2 # requires v2.10

or

FT.SEARCH index "@field==value" DIALECT 2 # requires v2.10

如有关范围查询的文章中所述，您还可以使用FILTER论点：

FT.SEARCH index "*" FILTER field start end

以下示例向您展示如何查询价格正好为 270 USD 的 bicycles：

>_ Redis 命令行界面

> FT.SEARCH idx:bicycle "@price:[270 270]"
1) (integer) 1
2) "bicycle:0"
3) 1) "$"
   2) "{\"pickup_zone\":\"POLYGON((-74.0610 40.7578, ...

> FT.SEARCH idx:bicycle "@price:[270]" # requires v2.10
1) (integer) 1
2) "bicycle:0"
3) 1) "$"
   2) "{\"pickup_zone\":\"POLYGON((-74.0610 40.7578, ...

> FT.SEARCH idx:bicycle "@price==270" # requires v2.10
1) (integer) 1
2) "bicycle:0"
3) 1) "$"
   2) "{\"pickup_zone\":\"POLYGON((-74.0610 40.7578, ...

> FT.SEARCH idx:bicycle "*" FILTER price 270 270
1) (integer) 1
2) "bicycle:0"
3) 1) "$"
   2) "{\"pickup_zone\":\"POLYGON((-74.0610 40.7578, ...


            
            

            
            
            
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Tag field
A tag is a short sequence of text, for example, "new" or "Los Angeles".

  
  
  
  Important:
  If you need to query for short texts, use a tag query instead of a full-text query. Tag fields are more space-efficient for storing index entries and often lead to lower query complexity for exact match queries.

You can construct a tag query for a single tag in the following way:
FT.SEARCH index "@field:{tag}"

  
  
  
  Note:
  The curly brackets are mandatory for tag queries.

This short example shows you how to query for new bicycles:












    





    
    




    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    














    
        
        
        
        
        
        
            
                >_ Redis CLI
            
        

        
            > FT.SEARCH idx:bicycle "@condition:{new}"
 1) (integer) 5
 2) "bicycle:0"
 3) 1) "$"
    2) "{\"pickup_zone\":\"POLYGON((-74.0610 40.7578, -73.9510 40.7578, -73.9510 40.6678, -74.0610 40.6678, -74.0610 40.7578))\",\"store_location\":\"-74.0060,40.7128\",\"brand\":\"Velorim\",\"model\":\"Jigger\",\"price\":270,\"description\":\"Small and powerful, the Jigger is the best ride for the smallest of tikes! This is the tiniest kids\xe2\x80\x99 pedal bike on the market available without a coaster brake, the Jigger is the vehicle of choice for the rare tenacious little rider raring to go.\",\"condition\":\"new\"}"
 4) "bicycle:5"
 5) 1) "$"
    2) "{\"pickup_zone\":\"POLYGON((-0.1778 51.5524, 0.0822 51.5524, 0.0822 51.4024, -0.1778 51.4024, -0.1778 51.5524))\",\"store_location\":\"-0.1278,51.5074\",\"brand\":\"Breakout\",\"model\":\"XBN 2.1 Alloy\",\"price\":810,\"description\":\"The XBN 2.1 Alloy is our entry-level road bike \xe2\x80\x93 but that\xe2\x80\x99s not to say that it\xe2\x80\x99s a basic machine. With an internal weld aluminium frame, a full carbon fork, and the slick-shifting Claris gears from Shimano\xe2\x80\x99s, this is a bike which doesn\xe2\x80\x99t break the bank and delivers craved performance.\",\"condition\":\"new\"}"
 6) "bicycle:6"
 7) 1) "$"
    2) "{\"pickup_zone\":\"POLYGON((2.1767 48.9016, 2.5267 48.9016, 2.5267 48.5516, 2.1767 48.5516, 2.1767 48.9016))\",\"store_location\":\"2.3522,48.8566\",\"brand\":\"ScramBikes\",\"model\":\"WattBike\",\"price\":2300,\"description\":\"The WattBike is the best e-bike for people who still feel young at heart. It has a Bafang 1000W mid-drive system and a 48V 17.5AH Samsung Lithium-Ion battery, allowing you to ride for more than 60 miles on one charge. It\xe2\x80\x99s great for tackling hilly terrain or if you just fancy a more leisurely ride. With three working modes, you can choose between E-bike, assisted bicycle, and normal bike modes.\",\"condition\":\"new\"}"
 8) "bicycle:7"
 9) 1) "$"
    2) "{\"pickup_zone\":\"POLYGON((13.3260 52.5700, 13.6550 52.5700, 13.6550 52.2700, 13.3260 52.2700, 13.3260 52.5700))\",\"store_location\":\"13.4050,52.5200\",\"brand\":\"Peaknetic\",\"model\":\"Secto\",\"price\":430,\"description\":\"If you struggle with stiff fingers or a kinked neck or back after a few minutes on the road, this lightweight, aluminum bike alleviates those issues and allows you to enjoy the ride. From the ergonomic grips to the lumbar-supporting seat position, the Roll Low-Entry offers incredible comfort. The rear-inclined seat tube facilitates stability by allowing you to put a foot on the ground to balance at a stop, and the low step-over frame makes it accessible for all ability and mobility levels. The saddle is very soft, with a wide back to support your hip joints and a cutout in the center to redistribute that pressure. Rim brakes deliver satisfactory braking control, and the wide tires provide a smooth, stable ride on paved roads and gravel. Rack and fender mounts facilitate setting up the Roll Low-Entry as your preferred commuter, and the BMX-like handlebar offers space for mounting a flashlight, bell, or phone holder.\",\"condition\":\"new\"}"
10) "bicycle:8"
11) 1) "$"
    2) "{\"pickup_zone\":\"POLYGON((1.9450 41.4301, 2.4018 41.4301, 2.4018 41.1987, 1.9450 41.1987, 1.9450 41.4301))\",\"store_location\":\"2.1734, 41.3851\",\"brand\":\"nHill\",\"model\":\"Summit\",\"price\":1200,\"description\":\"This budget mountain bike from nHill performs well both on bike paths and on the trail. The fork with 100mm of travel absorbs rough terrain. Fat Kenda Booster tires give you grip in corners and on wet trails. The Shimano Tourney drivetrain offered enough gears for finding a comfortable pace to ride uphill, and the Tektro hydraulic disc brakes break smoothly. Whether you want an affordable bike that you can take to work, but also take trail in mountains on the weekends or you\xe2\x80\x99re just after a stable, comfortable ride for the bike path, the Summit gives a good value for money.\",\"condition\":\"new\"}"

            
            

            
            
            
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Use double quotes and DIALECT 2 for exact match queries involving tags that contain special characters. As of v2.10, the only character that needs escaping in queries involving double-quoted tags is the double-quote character. Here's an example of using double-quoted tags that contain special characters:












    





    
    




    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    














    
        
        
        
        
        
        
            
                >_ Redis CLI
            
        

        
            > FT.CREATE idx:email ON JSON PREFIX 1 key: SCHEMA $.email AS email TAG
OK
> JSON.SET key:1 $ '{"email": "test@redis.com"}'
OK
> FT.SEARCH idx:email '@email:{"test@redis.com"}' DIALECT 2
1) (integer) 1
2) "key:1"
3) 1) "$"
   2) "{\"email\":\"test@redis.com\"}"

            
            

            
            
            
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Full-text field
A detailed explanation of full-text queries is available in the full-text queries documentation. You can also query for an exact match of a phrase within a text field:
FT.SEARCH index "@field:\"phrase\""

  
  
  
  Important:
  The phrase must be wrapped by escaped double quotes for an exact match query.
You can't use a phrase that starts with a stop word.


Here is an example for finding all bicycles that have a description containing the exact text 'rough terrain':












    





    
    




    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    

    
    
    
    
    
    














    
        
        
        
        
        
        
            
                >_ Redis CLI
            
        

        
            FT.SEARCH idx:bicycle "@description:\"rough terrain\""
1) (integer) 1
2) "bicycle:8"
3) 1) "$"
   2) "{\"pickup_zone\":\"POLYGON((1.9450 41.4301, 2.4018 41.4301, 2.4018 41.1987, 1.9450 41.1987, 1.9450 41.4301))\",\"store_location\":\"2.1734, 41.3851\",\"brand\":\"nHill\",\"model\":\"Summit\",\"price\":1200,\"description\":\"This budget mountain bike from nHill performs well both on bike paths and on the trail. The fork with 100mm of travel absorbs rough terrain. Fat Kenda Booster tires give you grip in corners and on wet trails. The Shimano Tourney drivetrain offered enough gears for finding a comfortable pace to ride uphill, and the Tektro hydraulic disc brakes break smoothly. Whether you want an affordable bike that you can take to work, but also take trail in mountains on the weekends or you\xe2\x80\x99re just after a stable, comfortable ride for the bike path, the Summit gives a good value for money.\",\"condition\":\"new\"}"

            
            

            
            
            
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                        Get Redis Insight
                    
                
            
           
           
        


    







        

  
  
    
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完全匹配查询

数值字段

Tag field

Full-text field

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