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2020-07-04 09:21:21
13.28. Release 0.215
General Changes
- Fix regression in 0.214 that could cause queries to produce incorrect results for queries using map types.
- Fix reporting of the processed input data for source stages in
EXPLAIN ANALYZE
. - Fail queries that use non-leaf resource groups. Previously, they would remain queued forever.
- Improve CPU usage for specific queries (#11757).
- Extend stats and cost model to support
row_number()
window function estimates. - Improve the join type selection and the reordering of join sides for cases where the join output size cannot be estimated.
- Add dynamic scheduling support to grouped execution. When a stage is executed with grouped execution and the stage has no remote sources, table partitions can be scheduled to tasks in a dynamic way, which can help mitigating skew for queries using grouped execution. This feature can be enabled with the
dynamic_schedule_for_grouped_execution
session property or the dynamic-schedule-for-grouped-execution
config property. - Add
beta_cdf()
and inverse_beta_cdf()
functions. - Split the reporting of raw input data and processed input data for source operators.
- Remove collection and reporting of raw input data statistics for the
Values
, Local Exchange
, and Local Merge Sort
operators. - Simplify
EXPLAIN (TYPE IO)
output when there are too many discrete components. This avoids large output at the cost of reduced granularity. - Add
parse_presto_data_size()
function. - Add support for
UNION ALL
to optimizer’s cost model. - Add support for estimating the cost of filters by using a default filter factor. The default value for the filter factor can be configured with the
default_filter_factor_enabled
session property or the optimizer.default-filter-factor-enabled
.
Geospatial Changes
- Add input validation checks to
ST_LineString()
to conform with the specification. - Improve spatial join performance.
- Enable spatial joins for join conditions expressed with the
ST_Within()
function.
Web UI Changes
- Fix Capture Snapshot button for showing current thread stacks.
- Fix dropdown for expanding stage skew component on the query details page.
- Improve the performance of the thread snapshot component on the worker status page.
- Make the reporting of Cumulative Memory usage consistent on the query list and query details pages.
- Remove legacy thread UI.
Hive Changes
- Add predicate pushdown support for the
DATE
type to the Parquet reader. This change also fixes a bug that may cause queries with predicates on DATE
columns to fail with type mismatch errors.
Redis Changes
- Prevent printing the value of the
redis.password
configuration property to log files.