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citus/CHANGELOG.md

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citus v6.0.1 (November 29, 2016)

  • Fixes a bug causing failures during pg_upgrade

  • Fixes a bug preventing DML queries during colocated table creation

  • Fixes a bug that caused NULL parameters to be incorrectly passed as text

citus v6.0.0 (November 7, 2016)

  • Adds compatibility with PostgreSQL 9.6, now the recommended version

  • Removes the pg_worker_list.conf file in favor of a pg_dist_node table

  • Adds master_add_node and master_add_node UDFs to manage membership

  • Removes the \stage command and corresponding csql binary in favor of COPY

  • Removes copy_to_distributed_table in favor of first-class COPY support

  • Adds support for multiple DDL statements within a transaction

  • Adds support for certain foreign key constraints

  • Adds support for parallel INSERT INTO ... SELECT against colocated tables

  • Adds support for the TRUNCATE command

  • Adds support for HAVING clauses in SELECT queries

  • Adds support for EXCLUDE constraints which include the partition column

  • Adds support for system columns in queries (tableoid, ctid, etc.)

  • Adds support for relation name extension within INDEX definitions

  • Adds support for no-op UPDATEs of the partition column

  • Adds several general-purpose utility UDFs to aid in Citus maintenance

  • Adds master_expire_table_cache UDF to forcibly expire cached shards

  • Parallelizes the processing of DDL commands which affect distributed tables

  • Adds support for repartition jobs using composite or custom types

  • Enhances object name extension to handle long names and large shard counts

  • Parallelizes the master_modify_multiple_shards UDF

  • Changes distributed table creation to error if the target table is not empty

  • Changes the pg_dist_shard.logicalrelid column from an oid to regclass

  • Adds a placementid column to pg_dist_shard_placement, replacing Oid use

  • Removes the pg_dist_shard.shardalias distribution metadata column

  • Adds pg_dist_partition.repmodel to track tables using streaming replication

  • Adds internal infrastructure to take snapshots of distribution metadata

  • Addresses the need to invalidate prepared statements on metadata changes

  • Adds a mark_tables_colocated UDF for denoting pre-6.0 manual colocation

  • Fixes a bug affecting prepared statement execution within PL/pgSQL

  • Fixes a bug affecting COPY commands using composite types

  • Fixes a bug that could cause crashes during EXPLAIN EXECUTE

  • Separates worker and master job temporary folders

  • Eliminates race condition between distributed modification and repair

  • Relaxes the requirement that shard repairs also repair colocated shards

  • Implements internal functions to track which tables' shards are colocated

  • Adds pg_dist_partition.colocationid to track colocation group membership

  • Extends shard copy and move operations to respect colocation settings

  • Adds pg_dist_local_group to prepare for future MX-related changes

  • Adds create_distributed_table to easily create shards and infer colocation

citus v5.2.2 (November 7, 2016)

  • Adds support for IF NOT EXISTS clause of CREATE INDEX command

  • Adds support for RETURN QUERY and FOR ... IN PL/pgSQL features

  • Extends the router planner to handle more queries

  • Changes COUNT of zero-row sets to return 0 rather than an empty result

  • Reduces the minimum permitted task_tracker_delay to a single millisecond

  • Fixes a bug that caused crashes during joins with a WHERE false clause

  • Fixes a bug triggered by unique violation errors raised in long transactions

  • Fixes a bug resulting in multiple registration of transaction callbacks

  • Fixes a bug which could result in stale reads of distribution metadata

  • Fixes a bug preventing distributed modifications in some PL/pgSQL functions

  • Fixes some code paths that could hypothetically read uninitialized memory

  • Lowers log level of waiting for activity messages

citus v5.2.1 (September 6, 2016)

  • Fixes subquery pushdown to properly extract outer join qualifiers

  • Addresses possible memory leak during multi-shard transactions

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