nGQL

Support LIMIT to limit the number of items returned from a result set. (#750)
Support YIELD in Pipe Syntax to designate return type. (#745)
Support ORDER BY used to sort the records in the result set. (#537)
Support udf_is_in to check if a value matches any value in a given value set. (#1096)
Support DELETE VERTEX to delete the vertex and its associated in and out edges. (#868)
Support UUID() to generate the global unique identifiers. (#958, #961, #1031)
Support Logic Symbols XOR, OR，AND and NOT. (#858)
Support TIMESTAMP data type. (#843)
Add more functions for String data type, such as upper(), trim(), lower(), substr(). (#841)
Support type casting in logic comparison. (#964)
Add leader information for SHOW HOSTS statement. (#918)
Support SHOW CONFIGS statement to show configuration options of the specific service [meta/storage/graph], GET CONFIGS to get the option value and UPDATE CONFIGS to update the option value. (#504)
Support FIND PATH statement to find the shortest path and full path. (#847)
Enhance GO statement to support graph traversal over multiple edge types. (#699)
Simplify the build process. (#1047, #948, #1083)

Storage

Support PUT/GET interface in storage engine. (#977)
Add Leader balance. (#731, #881)
Support HTTP interface to monitor performance metrics (such as QPS, Latency AVG/ P99/ P999, etc.) of each storage server. (#872, #1136)
Support scaling out/in for storage. (#421, #444, #795, #881, #998)
Support retry for Meta client, three times by default. (#814)

Split metad, storaged and graphd into three images. Add Dockerfiles to build images. (#923)
Add Golang client support and move clients to separate repositories, check vesoft-inc/nebula-go and vesoft-inc/nebula-java for details.