Release 0.194

    • Fix deadlock in memory management logic introduced in the previous release.

    • Restrict (number of result elements) to 10,000 or less for min(col, n), max(col, n), min_by(col1, col2, n), and max_by(col1, col2, n).

    • Improve error message when a session property references an invalid catalog.

    • Reduce memory usage of histogram() aggregation function.

    • Include minimum and maximum values for columns in SHOW STATS.

    Web UI Changes

    • Fix previously empty peak memory display in the query details page.

    • Fix regression in CLI that makes it always print “query aborted by user” when the result is displayed with a pager, even if the query completes successfully.

    • Return a non-zero exit status when an error occurs.

    • Add --ignore-errors option to continue processing in batch mode when an error occurs.

    JDBC Driver Changes

    • Allow setting client tags via the ClientTags client info property.

    • Expose update type via getUpdateType() on PrestoStatement.

    • Consistently fail queries that attempt to read partitions that are offline. Previously, the query can have one of the following outcomes: fail as expected, skip those partitions and finish successfully, or hang indefinitely.

    • Allow setting username used to access Hive metastore via the config property.

    • Add hive_storage_format and respect_table_format session properties, corresponding to the hive.storage-format and hive.respect-table-format config properties.

    Cassandra Changes