Overview of changes
Here are some key features and fixes:
- Support for unique constraints to ensure that a column does not have duplicate values in YCQL.
- Support fine grained selection and update of JSON attributes, built-in JSON operators in YCQL.
- Support for AVERAGE, blob conversion functions in YCQL.
- Ability to read from the local datacenter when using YEDIS.
- Support ZSCORE in YEDIS.
- Support bounded staleness for follower reads.
- Presto integration.
Key Commits
- [
ab0611e] ENG-3453: Add TLS support to RPC layer - [
70fcb1b] Add a workload to test secondary indexes in postgres. - [
b06d6c3] Use thread pool to pickup status tablet when wait is disallowed - [
979fbc8] Ensure we allow the same column multiple times in WHERE and IF clauses for json and collection columns - [
aa3621e] Fix check failure when reading in future - [
8e0bf34] #322: Always raise unique constraint error for unique secondary index violation - [
bc58df3] Fix TSAN issue with sys_catalog in catalog manager - [
43c1146] (#331) ENG-3407: Pick local transaction status tablet - [
25177f6] Remove redundant delete from index table - [
9879ada] #276: Bounded staleness for follower reads - [
c6e0c4d] #322: Abort transaction on failed DML. - [
b8ddceb] #322: Implement unique secondary index - [
7ccda6f] #327: Fix missing null index column values. - [
642e0e7] #325: Fix SEGV when creating an index with an unsupported index column datatype. - [
97f32b2] #287: Fix occasional inconsistent read of data written in a distributed transaction - [
405396a] #293: Use a separate RocksDB for provisional records - [
d0779bd] #294: Tserver misses new master info in some cases. - [
9582136] (#294) Fix tserver overwriting master address list in-memory. - [
1c3a235] #311 Prefer local tserver, or tservers in the same zone when redis_allow_reads_from_followers is set - [
a855a96] ENG-3378 cqlsh: "select * from system.transactions" crashes tserver. - [
de1a8f9] (#303): Handle multiple updates to same column in SET expression appropriately. - [
c846c6c] Support fine grained updates for JSON columns. - [
41f4982] #310: Fixes for yb-ctl setup_redis wait and num_shards - [
25c75f4] Add support of NTP clock to master - [
6287d0a] ENG-3282: #313: Use HostPort in Proxy instead of Endpoint - [
03dc761] ENG-2724 Strongly Typed Uuids - [
3146d18] Implement transaction read restart - [
c2e0f20] Add metric to track read requests requiring restart. - [
57d40c6] #312 Fix handling of min value as token upper bound - [
3ac9146] Add metric to track expired transactions. - [
103f074] #307: Fix occasional "SetTransaction with non empty batcher" error when committing a distributed transaction - [
7bb3972] ENG-3317: Fix issues with high concurrent transaction aborts because of write conflicts - [
99f0ae1] #264 Implement blob conversion functions in YQL (simple data types). - [
4b450cd] #238: Retry distributed transaction on conflicts - [
eddf548] (#291) [YCQL] Aggregation functions headers - [
0be501d] ENG-3293: implement secondary index workload - [
40d75b7] Remove error logging and reduce pool overflow log rate. - [
5b4b4b4] #296 Add the size_estimates system table to YCQL - [
9aca5e0] Update Spark and Cassandra driver versions - [
4f1d848] (#26) Implement CAST(expr as Typename) builtin function (especially for json) - [
2dfc031] (#290): Add support for avg in YCQL - [
30c425f] ENG-3213: Implement IsLeaderLoadBalanced RPC - [
9a13bde] Remove ExecContext::Error overloaded APIs - [
1c011ea] #277: Add metric to track distribute transaction conflicts - [
71f1d82] Ensure json scalar strings don't require quotes. - [
28845be] Fix some sample apps to honor the user specified table name. - [
49edf46] Add custom numeric opcode to builtin function directory. - [
deb2fc5] #282: Enhance master change config to remove a dead peer. - [
56803e3] ENG-3184: Two read buffers per connection should not count towards the read buffer limit - [
5dae084] Reduce rpc timeout defaults for redis - [
f619ccd] ENG-3239. Remove repeated log. - [
94d19c0] (#175) ENG 3108: Implement ZSCORE - [
5bfb330] ENG-3217: Introduce interval for update consumption of root mem tracker - [
92ce6d0] #260 Accept lowercase options expire_in expire_at. Improve the error messages when the absolute timestamp is incorrect - [
eb5b0f8] #259 Fix inconsistencies in YCQL keyword list - [
5d48691] #237: Fix transaction status leadership change - [
7bf8cbb] (#163) Support fine grained selection of json attributes in CQL. - [
5cc9357] (#162) Add support in docdb to correctly evaluate json operators.