redis how to combine multiple commands in 1 query - redis

Question

How to Query
red ferrari with limited edition
with topSpeed between 200 To 210 And
Price between 190 to 205
DATA
HMSET cars:1 make ferrari Price 199 limited yes color red topSpeed 202
HMSET cars:2 make porsche Price 555 limited no color yellow topSpeed 500
SADD make:ferrari 1
SADD color:red 1
SADD limited:yes 1
ZADD Price 199 1
ZADD topSpeed 202 1
SADD make:porsche 2
SADD color:yellow 2
SADD limited:no 2
ZADD Price 555 2
ZADD topSpeed 500 2
I Tried & Don't know how to add multiple range for price and topSpeed both?
multi.ZINTERSTORE('tempTom',4,
'color:red',
'make:ferrari',
'limited:yes',
'topSpeed'
);
multi.ZRANGEBYSCORE('tempTom' , 202 ,205) //range for topSpeed
//so how to add range for Price also ?
Output
[1,[]]
What am i doing wrong , how to query with multiple commands 1 after another ?

Answer 1

AFAIK - This is pretty much impossible to do with 1 query in Redis. You are trying to use a key-vale store as a relational database. There is a way to do it in Redis but with 2 queries. However, you can wrap it as a single transaction in MULTI / EXEC and thus effectively making it 1 query.
For example:
Create 2 more sets, one for topSpeed and another for price. Then just perform a SINTER between those two (first query). Then use that result to query your car (second query).
Explanation:
# Inserting cars top speed
ZADD car:top-speed:210 "ferrari"
ZADD car:top-speed:300 "porsche"
# Inserting cars price (e.g. both cars have the same price)
ZADD car:price:190 "ferrari" "porsche"
# Using SINTER to get all cars with top speed of 210 and a price of 190
SINTER car:top-speed:210 car:price:300 // output "ferrari"
Use the output to query your car set and get all the other details (Don't forget the MULTI / EXEC).
You can add more 'filters' by simply adding more sets and performing the intersection on all of them. You would however, have to populate all these sets whenever you add a new car. But this is normal in Redis and does not suffer big performance issues. You can check here for another similar example if my explanation is not clear.
Hope this helps

Answer 2

Perhaps EVAL is what you are looking for? (perhaps not)..
It uses LUA scripts to execute a batch of commands in one call (and optionally return the result).
It is KIND OF like a stored procedure for REDIS. The uploaded LUA gets cached so you don't need to load it over and over.
The examples I see aren't EXACTLY what you are looking for but demonstrate multi-part queries. You need to read down into them to see the meat before you give up on EVAL (I almost did).
Object Queries with Redis
A Speed Guide To Redis Lua Scripting
EVAL (from the redis docs)
The only reason I know about this is because a coworker here insists on using redis as a relational database. It is not unlike using a hammer as a screwdriver.