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Merge pull request #1954 from citusdata/citus-7.2.0-changelog-1516086689 

Add changelog entry for 7.2.0
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Burak Velioglu 2018-01-16 11:23:14 +03:00 committed by GitHub
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CHANGELOG.md
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### citus v7.2.0 (January 16, 2018) ###
* Adds support for CTEs
* Adds support for subqueries that require merge step
* Adds support for set operations (UNION, INTERSECT, ...)
* Adds support for querying local tables in CTEs and subqueries
* Adds support for more SQL coverage in subqueries for reference tables
* Adds support for count(distinct) in queries with a subquery
* Adds support for non-equijoins when there is already an equijoin for queries
* Adds support for non-equijoins when there is already an equijoin for subquery
* Adds support for real-time executor to run in transaction blocks
* Adds infrastructure for storing intermediate distributed query results
* Adds a new GUC named `enable_repartition_joins` for auto executor switch
* Adds support for limiting the intermediate result size
* Improves support for queries with unions containing filters
* Improves support for queries with unions containing joins
* Improves support for subqueries in the `WHERE` clause
* Increases `COPY` throughput
* Enables pushing down queries containing only recurring tuples and `GROUP BY`
* Load-balance queries that read from 0 shards
* Improves support for using functions in subqueries
* Fixes a bug that could cause real-time executor to crash during cancellation
* Fixes a bug that could cause real-time executor to get stuck on cancellation
* Fixes a bug that could block modification queries unnecessarily
* Fixes a bug that could cause assigning wrong IDs to transactions
* Fixes a bug that could cause an assert failure with `ANALYZE` statements
* Fixes a bug that could allow pushing down wrong set operations in subqueries
* Fixes a bug that could cause a deadlock in create_distributed_table
* Fixes a bug that could confuse user about `ANALYZE` usage
* Fixes a bug that could lead to false positive distributed deadlock detections
* Relaxes the locking for DDL commands on partitioned tables
* Relaxes the locking on `COPY` with replication
* Logs more remote commands when citus.log_remote_commands is set
### citus v6.2.5 (January 11, 2018) ###
* Fixes a bug that could crash the coordinator while reporting a remote error