Release 303 (13 Feb 2019)

General

• Fix incorrect padding for CHAR values containing Unicode supplementary characters. Previously, such values would be incorrectly padded with too few spaces. ({issue}195)
• Fix an issue where a union of a table with a VALUES statement would execute on a single node, which could lead to out of memory errors. ({issue}207)
• Fix /v1/info to report started status after all plugins have been registered and initialized. ({issue}213)
• Improve performance of window functions by avoiding unnecessary data exchanges over the network. ({issue}177)
• Choose the distribution type for semi joins based on cost when the join_distribution_type session property is set to AUTOMATIC. ({issue}160)
• Expand grouped execution support to window functions, making it possible to execute them with less peak memory usage. ({issue}169)

Web UI

• Add additional details to and improve rendering of live plan. ({issue}182)

CLI

• Add --progress option to show query progress in batch mode. ({issue}34)

Hive connector

• Fix query failure when reading Parquet data with no columns selected. This affects queries such as SELECT count(*). ({issue}203)

Mongo connector

• Fix failure for queries involving joins or aggregations on ObjectId type. ({issue}215)

Base-JDBC connector library

• Allow customizing how query predicates are pushed down to the underlying database. ({issue}109)
• Allow customizing how values are written to the underlying database. ({issue}109)

SPI

• Remove deprecated methods getSchemaName and getTableName from the SchemaTablePrefix class. These were replaced by the getSchema and getTable methods. ({issue}89)
• Remove deprecated variants of methods listTables and listViews from the ConnectorMetadata class. ({issue}89)