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CHANGELOG.md

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citus v5.2.0 (August 15, 2016)

  • Drops support for PostgreSQL 9.4; PostgreSQL 9.5 is required

  • Adds schema support for tables, other named objects (types, operators, etc.)

  • Evaluates non-immutable functions on master in all modification commands

  • Adds support for SERIAL types in non-partition columns

  • Adds support for RETURNING clause in INSERT, UPDATE, and DELETE commands

  • Adds support for multi-statement transactions involving a fixed set of nodes

  • Full SQL support for SELECT queries which can be executed on a single worker

  • Adds option to perform DDL changes using prepared transactions (2PC)

  • Adds an enable_ddl_propagation parameter to control DDL propagation

  • Accelerates shard pruning during merges

  • Adds master_modify_multiple_shards UDF to modify many shards at once

  • Adds COPY support for arrays of user-defined types

  • Now supports parameterized prepared statements for certain use cases

  • Extends LIMIT/OFFSET support to all executor types

  • Constraint violations now fail fast rather than hitting all placements

  • Makes master_create_empty_shard aware of shard placement policy

  • Reduces unnecessary sleep during queries processed by real-time executor

  • Improves task tracker executor's task cleanup logic

  • Relaxes restrictions on cancellation of DDL commands

  • Removes ONLY keyword from worker SELECT queries

  • Error message improvements and standardization

  • Moves master_update_shard_statistics function to pg_catalog schema

  • Fixes a bug where hash-partitioned anti-joins could return incorrect results

  • Now sets storage type correctly for foreign table-backed shards

  • Fixes master_update_shard_statistics issue with hash-partitioned tables

  • Fixes an issue related to extending table names that require escaping

  • Reduces risk of row counter overflows during modifications

  • Fixes a crash related to FILTER clause use in COUNT DISTINCT subqueries

  • Fixes crashes related to partition columns with high attribute numbers

  • Fixes certain subquery and join crashes

  • Detects flex for build even if PostgreSQL was built without it

  • Fixes assert-enabled crash when all_modifications_commutative is true

citus v5.2.0-rc.1 (August 1, 2016)

  • Initial 5.2.0 candidate

citus v5.1.1 (June 17, 2016)

  • Adds complex count distinct expression support in repartitioned subqueries

  • Improves task tracker job cleanup logic, addressing a memory leak

  • Fixes bug that generated incorrect results for LEFT JOIN queries

  • Improves compatibility with Debian's reproducible builds project

  • Fixes build issues on FreeBSD platforms

citus v5.1.0 (May 17, 2016)

  • Adds distributed COPY to rapidly populate distributed tables

  • Adds support for using EXPLAIN on distributed queries

  • Recognizes and fast-paths single-shard SELECT statements automatically

  • Increases INSERT throughput via shard pruning optimizations

  • Improves planner performance for joins involving tables with many shards

  • Adds ability to pass columns as arguments to function calls in UPDATEs

  • Introduces transaction manager for use by multi-shard commands

  • Adds COUNT(DISTINCT ...) pushdown optimization for hash-partitioned tables

  • Adds support for certain UNIQUE indexes on hash- or range-partitioned tables

  • Deprecates \stage in favor of using COPY for append-partition tables

  • Deprecates copy_to_distributed_table in favor of first-class COPY support

  • Fixes build problems when using non-packaged PostgreSQL installs

  • Fixes bug that sometimes skipped pruning when partitioned by a VARCHAR column

  • Fixes bug impeding use of user-defined functions in repartitioned subqueries

  • Fixes bug involving queries with equality comparisons of boolean types

  • Fixes crash that prevented use alongside pg_stat_statements

  • Fixes crash arising from SELECT queries that lack a target list

  • Improves warning and error messages

citus v5.1.0-rc.2 (May 10, 2016)

  • Fixes test failures

  • Fixes EXPLAIN output when FORMAT JSON in use

citus v5.1.0-rc.1 (May 4, 2016)

  • Initial 5.1.0 candidate

citus v5.0.1 (April 15, 2016)

  • Fixes issues on 32-bit systems

citus v5.0.0 (March 24, 2016)

  • Public release under AGPLv3

  • PostgreSQL extension compatible with PostgreSQL 9.5 and 9.4