Release 338 (07 Jul 2020)

General

• Fix incorrect results when joining tables on a masked column. ({issue}4251)
• Fix planning failure when multiple columns have a mask. ({issue}4322)
• Fix incorrect comparison for TIMESTAMP WITH TIME ZONE values with precision larger than 3. ({issue}4305)
• Fix incorrect rounding for timestamps before 1970-01-01. ({issue}4370)
• Fix query failure when using VALUES with a floating point NaN value. ({issue}4119)
• Fix query failure when joining tables on a real or double column and one of the joined tables contains NaN value. ({issue}4272)
• Fix unauthorized error for internal requests to management endpoints. ({issue}4304)
• Fix memory leak while using dynamic filtering. ({issue}4228)
• Improve dynamic partition pruning for broadcast joins. ({issue}4262)
• Add support for setting column comments via the COMMENT ON COLUMN syntax. ({issue}2516)
• Add compatibility mode for legacy clients when rendering datetime type names with default precision in information_schema tables. This can be enabled via the deprecated.omit-datetime-type-precision configuration property or omit_datetime_type_precision session property. ({issue}4349, {issue}4377)
• Enforce NOT NULL column declarations when writing data. ({issue}4144)

JDBC driver

• Fix excessive CPU usage when reading query results. ({issue}3928)
• Implement DatabaseMetaData.getClientInfoProperties(). ({issue}4318)

Elasticsearch connector

• Add support for reading numeric values encoded as strings. ({issue}4341)

Hive connector

• Fix incorrect query results when Parquet file has no min/max statistics for an integral column. ({issue}4200)
• Fix query failure when reading from a table partitioned on a real or double column containing a NaN value. ({issue}4266)
• Fix sporadic failure when writing to bucketed sorted tables on S3. ({issue}2296)
• Fix handling of strings when translating Hive views. ({issue}3266)
• Do not require cache directories to be configured on coordinator. ({issue}3987, {issue}4280)
• Fix Azure ADL caching support. ({issue}4240)
• Add support for setting column comments. ({issue}2516)
• Add hidden $partition column for partitioned tables that contains the partition name. ({issue}3582)

Kafka connector

• Fix query failure when a column is projected and also referenced in a query predicate when reading from Kafka topic using RAW decoder. ({issue}4183)

MySQL connector

• Fix type mapping for unsigned integer types. ({issue}4187)

Oracle connector

• Exclude internal schemas (e.g., sys) from schema listings. ({issue}3784)
• Add support for connection pooling. ({issue}3770)

Base-JDBC connector library

• Exclude the underlying database's information_schema from schema listings. ({issue}3834)