Release 0.101#
General#
Add support for CREATE TABLE (in addition to CREATE TABLE AS).
Add
IF EXISTS
support to DROP TABLE and DROP VIEW.Add
array_agg()
function.Add
array_intersect()
function.Add
array_position()
function.Add
regexp_split()
function.Add support for
millisecond
todate_diff()
anddate_add()
.Fix excessive memory usage in
map_agg()
.Fix excessive memory usage in queries that perform partitioned top-N operations with
row_number()
.Optimize ARRAY comparison operators.
Fix analysis of
UNION
queries for tables with hidden columns.Fix
JOIN
associativity to be left-associative instead of right-associative.Add
source
column toruntime.queries
table in System connector.Add
coordinator
column toruntime.nodes
table in System connector.Add
errorCode
,errorName
anderrorType
toerror
object in REST API (errorCode
previously existed but was always zero).Fix
DatabaseMetaData.getIdentifierQuoteString()
in JDBC driver.Handle thread interruption in JDBC driver
ResultSet
.Add
history
command and support for running previous commands via!n
to the CLI.Change Driver to make as much progress as possible before blocking. This improves responsiveness of some limit queries.
Add predicate push down support to JMX connector.
Add support for unary
PLUS
operator.Improve scheduling speed by reducing lock contention.
Extend optimizer to understand physical properties such as local grouping and sorting.
Add support for streaming execution of window functions.
Make
UNION
run partitioned, if underlying plan is partitioned.Add
hash_partition_count
session property to control hash partitions.
Web UI#
The main page of the web UI has been completely rewritten to use ReactJS. It also has a number of new features, such as the ability to pause auto-refresh via the āZā key and also with a toggle in the UI.
Hive#
Add support for connecting to S3 using EC2 instance credentials. This feature is enabled by default. To disable it, set
hive.s3.use-instance-credentials=false
in your Hive catalog properties file.Treat ORC files as splittable.
Change PrestoS3FileSystem to use lazy seeks, which improves ORC performance.
Fix ORC
DOUBLE
statistic for columns containingNaN
.Lower the Hive metadata refresh interval from two minutes to one second.
Invalidate Hive metadata cache for failed operations.
Support
s3a
file system scheme.Fix discovery of splits to correctly backoff when the queue is full.
Add support for non-canonical Parquet structs.
Add support for accessing Parquet columns by name. By default, columns in Parquet files are accessed by their ordinal position in the Hive table definition. To access columns based on the names recorded in the Parquet file, set
hive.parquet.use-column-names=true
in your Hive catalog properties file.Add JMX stats to PrestoS3FileSystem.
Add
hive.recursive-directories
config option to recursively scan partition directories for data.
SPI#
Add connector callback for rollback of
INSERT
andCREATE TABLE AS
.Introduce an abstraction for representing physical organizations of a table and describing properties such as partitioning, grouping, predicate and columns.
ConnectorPartition
and related interfaces are deprecated and will be removed in a future version.Rename
ConnectorColumnHandle
toColumnHandle
.
Note
This is a backwards incompatible change with the previous connector SPI. If you have written a connector, you will need to update your code before deploying this release.