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Release 318 (26 Aug 2019)

General​

  • Fix query failure when using DISTINCT FROM with the UUID or IPADDRESS types. (#1180)
  • Improve query performance when optimize_hash_generation is enabled. (#1071)
  • Improve performance of information schema tables. (#999, #1306)
  • Rename http.server.authentication.* configuration options to http-server.authentication.*. (#1270)
  • Change query CPU tracking for resource groups to update periodically while the query is running. Previously, CPU usage would only update at query completion. This improves resource management fairness when using CPU-limited resource groups. (#1128)
  • Remove distributed_planning_time_ms column from system.runtime.queries. (#1084)
  • Add support for Asia/Qostanay time zone. (#1221)
  • Add session properties that allow overriding the query per-node memory limits: query_max_memory_per_node and query_max_total_memory_per_node. These properties can be used to decrease limits for a query, but not to increase them. (#1212)
  • Add Google Sheets connector. (#1030)
  • Add planning_time_ms column to the system.runtime.queries table that shows the time spent on query planning. This is the same value that used to be in the analysis_time_ms column, which was a misnomer. (#1084)
  • Add last_day_of_month() function. (#1295)
  • Add support for cancelling queries via the system.runtime.kill_query procedure when they are in the queue or in the semantic analysis stage. (#1079)
  • Add queries that are in the queue or in the semantic analysis stage to the system.runtime.queries table. (#1079)

Web UI​

  • Display information about queries that are in the queue or in the semantic analysis stage. (#1079)
  • Add support for cancelling queries that are in the queue or in the semantic analysis stage. (#1079)

Hive connector​

  • Fix query failure due to missing credentials while writing empty bucket files. (#1298)
  • Fix bucketing of NaN values of real type. Previously NaN values could be assigned a wrong bucket. (#1336)
  • Fix reading RCFile collection delimiter set by Hive version earlier than 3.0. (#1321)
  • Return proper error when selecting "$bucket" column from a table using Hive bucketing v2. (#1336)
  • Improve performance of S3 object listing. (#1232)
  • Improve performance when reading data from GCS. (#1200)
  • Add support for reading data from S3 Requester Pays buckets. This can be enabled using the hive.s3.requester-pays.enabled configuration property. (#1241)
  • Allow inserting into bucketed, unpartitioned tables. (#1127)
  • Allow inserting into existing partitions of bucketed, partitioned tables. (#1347)

PostgreSQL connector​

  • Add support for providing JDBC credential in a separate file. This can be enabled by setting the credential-provider.type=FILE and connection-credential-file config options in the catalog properties file. (#1124)
  • Allow logging all calls to JdbcClient. This can be enabled by turning on DEBUG logging for io.prestosql.plugin.jdbc.JdbcClient. (#1274)
  • Add possibility to force mapping of certain types to varchar. This can be enabled by setting jdbc-types-mapped-to-varchar to comma-separated list of type names. (#186)
  • Add support for PostgreSQL timestamp[] type. (#1023, #1262, #1328)

MySQL connector​

  • Add support for providing JDBC credential in a separate file. This can be enabled by setting the credential-provider.type=FILE and connection-credential-file config options in the catalog properties file. (#1124)
  • Allow logging all calls to JdbcClient. This can be enabled by turning on DEBUG logging for io.prestosql.plugin.jdbc.JdbcClient. (#1274)
  • Add possibility to force mapping of certain types to varchar. This can be enabled by setting jdbc-types-mapped-to-varchar to comma-separated list of type names. (#186)

Redshift connector​

  • Add support for providing JDBC credential in a separate file. This can be enabled by setting the credential-provider.type=FILE and connection-credential-file config options in the catalog properties file. (#1124)
  • Allow logging all calls to JdbcClient. This can be enabled by turning on DEBUG logging for io.prestosql.plugin.jdbc.JdbcClient. (#1274)
  • Add possibility to force mapping of certain types to varchar. This can be enabled by setting jdbc-types-mapped-to-varchar to comma-separated list of type names. (#186)

SQL Server connector​

  • Add support for providing JDBC credential in a separate file. This can be enabled by setting the credential-provider.type=FILE and connection-credential-file config options in the catalog properties file. (#1124)
  • Allow logging all calls to JdbcClient. This can be enabled by turning on DEBUG logging for io.prestosql.plugin.jdbc.JdbcClient. (#1274)
  • Add possibility to force mapping of certain types to varchar. This can be enabled by setting jdbc-types-mapped-to-varchar to comma-separated list of type names. (#186)

SPI​

  • Add Block.isLoaded() method. (#1216)
  • Update security APIs to accept the new ConnectorSecurityContext and SystemSecurityContext classes. (#171)
  • Allow connectors to override minimal schedule split batch size. (#1251)