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API reference

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Introduction

The YEDIS API provides a clustered, auto-sharded, globally distributed and persistent key-value API that is compatible with the Redis commands library. A Redis client can connect, send requests, and receive results from YugabyteDB.

Data types

The following data types can be read and written via the YEDIS API.

Data type	Development status
String	Supported
Hash	Supported
Set	Supported
Sorted set	Supported
List	Not yet supported
Bitmaps	Not yet supported
HyperLogLogs	Not yet supported
GeoSpatial	Not yet supported
Time series	New data type in YugabyteDB

Commands

Redis-cli or any Redis applications can access YugabyteDB using the YEDIS API. The following Redis commands are accepted.

Command	Description
String data type
`APPEND`	Append data to end of string
`DEL`	Delete keys from a database
`EXISTS`	Check if the keys are present
`EXPIRE`	Set key timeout in seconds
`EXPIREAT`	Set key timeout as timestamp
`SET`	Write or overwrite a string value
`SETEX`	Write or overwrite a string value and set TTL in seconds
`PSETEX`	Write or overwrite a string value and set TTL in milliseconds
`SETRANGE`	Write a subsection of a string
`GET`	Read string value
`GETRANGE`	Read substring
`GETSET`	Atomically read and write a string
`INCR`	Increment the value by one
`KEYS`	Retrieve all keys matching a pattern
`PEXPIRE`	Set key timeout in milliseconds
`PEXPIREAT`	Set key timeout as timestamp in milliseconds
`PTTL`	Get time to live for key in milliseconds
`TTL`	Get time to live for key in seconds
Hash data type
`HDEL`	Remove specified entries from a hash
`HEXISTS`	Check if the subkeys are present in the hash
`HGET`	Read a field in hash
`HGETALL`	Read all the contents in a hash
`HKEYS`	Read all value-keys in a hash
`HLEN`	Get the number of entries in a hash
`HMGET`	Read values for the given keys in a hash
`HMSET`	Write values for the given keys in a hash
`HSET`	Write one entry in a hash
`HSTRLEN`	Read the length of a specified entry in a hash
`HVALS`	Read all values in a hash
Set data type
`SADD`	Add entries to a set
`SCARD`	Read the number of entries in a set
`SISMEMBER`	Check if the members are present in a set
`SMEMBERS`	Read all members of a set
`SREM`	Remove members from a set
`STRLEN`	Read the length of a string
Time series data type
`TSADD`	Add a time series entry
`TSCARD`	Retrieve the number of elements in the given time series
`TSGET`	Retrieve a time series entry
`TSLASTN`	Retrieve the latest N time series entries for a given time series
`TSRANGEBYTIME`	Retrieve time series entries for a given time range
`TSREM`	Delete a time series entry
`TSREVRANGEBYTIME`	Retrieve time series entries for a given time range ordered from newest to oldest
Sorted set data type
`ZADD`	Add a sorted set entry
`ZCARD`	Get cardinality of a sorted set
`ZRANGE`	Retrieve sorted set entries for given index range
`ZRANGEBYSCORE`	Retrieve sorted set entries for a given score range
`ZREM`	Delete a sorted set entry
`ZREVRANGE`	Retrieve sorted set entries for given index range ordered from highest to lowest score
`ZSCORE`	Get the score of member at a sorted set key
General
`AUTH`	Authenticates a client connection to YEDIS API
`CONFIG`	Not fully supported. Only used to set the required password(s) for YEDIS API
`ECHO`	Output messages
`MONITOR`	Debugging tool to see all requests that are processed by a YEDIS API server
`ROLE`	Read role of a node
`RENAME`	Rename one key as another
Database
`FLUSHALL`	Delete all keys from all databases
`FLUSHDB`	Delete all keys from a database
`CREATEDB`	Create a new yedis database
`LISTDB`	List all the yedis databases present
`DELETEDB`	Delete a yedis database
`SELECT`	Select the target database to communcate with
Pub-Sub
`PUBSUB`	Used to query the state of the Pub/Sub system.
`PUBLISH`	Publishes a message to the specified channel
`SUBSCRIBE`	Subscribes the client to the specified channel(s)
`PSUBSCRIBE`	Subscribes the client to the specified pattern(s)
`UNSUBSCRIBE`	Unubscribes the client from the specified channel(s)
`PUNSUBSCRIBE`	Unubscribes the client from the specified pattern(s)