Release 0.61

Add support for Table Value Constructors

Presto now supports the SQL table value constructor syntax to create inline tables. The VALUES clause can be used anywhere a SELECT statement is allowed. For example, as a top-level query:

1. VALUES ('a', 1), ('b', 2);

1. _col0 | _col1
2. -------+-------
3. a     |     1
4. b     |     2
5. (2 rows)

Alternatively, in the FROM clause:

1. SELECT *
2. FROM (
3. VALUES
4. ('a', 'ape'),
5. ('b', 'bear')
6. ) AS animal (letter, animal)
7. JOIN (
8. VALUES
9. ('a', 'apple'),
10. ('b', 'banana')
11. ) AS fruit (letter, fruit)
12. USING (letter);

1. letter | animal | letter |  fruit
2. --------+--------+--------+---------
3. a      | ape    | a      | apple
4. b      | bear   | b      | banana
5. (2 rows)

Cassandra

  • Add support for upper-case schema, table, and columns names.
  • Add support for DECIMAL type.

Amazon S3 support

  • Completely rewritten Hadoop FileSystem implementation for S3 using the Amazon AWS SDK, with major performance and reliability improvements.
  • Add support for writing data to S3.

Miscellaneous

  • General improvements to the JDBC driver, specifically with respect to metadata handling.
  • Fix division by zero errors in variance aggregation functions (VARIANCE, STDDEV, etc.).
  • Fix a bug when using DISTINCT aggregations in the HAVING clause.
  • Fix an out of memory issue when writing large tables.
  • Fix a bug when using ORDER BY rand() in a JOIN query.
  • Fix handling of timestamps in maps and lists in Hive connector.
  • Add instrumentation for Hive metastore and HDFS API calls to track failures and latency. These metrics are exposed via JMX.