Release 302 (6 Feb 2019)

General

• Fix cluster starvation when wait for minimum number of workers is enabled. ({issue}155)
• Fix backup of queries blocked waiting for minimum number of workers. ({issue}155)
• Fix failure when preparing statements that contain a quoted reserved word as a table name. ({issue}80)
• Fix query failure when spilling is triggered during certain phases of query execution. ({issue}164)
• Fix SHOW CREATE VIEW output to preserve table name quoting. ({issue}80)
• Add {doc}/connector/elasticsearch. ({issue}118)
• Add support for boolean type to {func}approx_distinct. ({issue}82)
• Add support for boolean columns to EXPLAIN with type IO. ({issue}157)
• Add SphericalGeography type and related {doc}geospatial functions </functions/geospatial>. ({issue}166)
• Remove deprecated system memory pool. ({issue}168)
• Improve query performance for certain queries involving ROLLUP. ({issue}105)

CLI

• Add --trace-token option to set the trace token. ({issue}117)
• Display spilled data size as part of debug information. ({issue}161)

Web UI

• Add spilled data size to query details page. ({issue}161)

Security

• Add http.server.authentication.krb5.principal-hostname configuration option to set the hostname for the Kerberos service principal. ({issue}146, {issue}153)
• Add support for client-provided extra credentials that can be utilized by connectors. ({issue}124)

Hive connector

• Fix Parquet predicate pushdown for smallint, tinyint types. ({issue}131)
• Add support for Google Cloud Storage (GCS). Credentials can be provided globally using the hive.gcs.json-key-file-path configuration property, or as a client-provided extra credential named hive.gcs.oauth if the hive.gcs.use-access-token configuration property is enabled. ({issue}124)
• Allow creating tables with the external_location property pointing to an empty S3 directory. ({issue}75)
• Reduce GC pressure from Parquet reader by constraining the maximum column read size. ({issue}58)
• Reduce network utilization and latency for S3 when reading ORC or Parquet. ({issue}142)

Kafka connector

• Fix query failure when reading information_schema.columns without an equality condition on table_name. ({issue}120)

Redis connector

• Fix query failure when reading information_schema.columns without an equality condition on table_name. ({issue}120)

SPI

• Include query peak task user memory in QueryCreatedEvent and QueryCompletedEvent. ({issue}163)
• Include plan node cost and statistics estimates in QueryCompletedEvent. ({issue}134)
• Include physical and internal network input data size in QueryCompletedEvent. ({issue}133)