DDlog v1.2.3

[1.2.3] - Dec 13, 2021

Quality-of-life improvements

• Avoid recompiling Rust crates when only arrangement debug info changes.

DDlog v1.2.2

[1.2.2] - Dec 9, 2021

Bug fixes

• Fix jump-to-record functionality in HTML profiles.

DDlog v1.2.1

[1.2.1] - Dec 8, 2021

Bug fixes

• Fix row highlighting in HTML profiles.

DDlog v1.2.0

[1.2.0] - Dec 8, 2021

Bug fixes

• Fix broken command recording in the DDlogDynamic API.

SQL-to-DDlog compiler

• More efficient joins
• Bug fixes

Self-profiler

• Add anchors to the profile, so one can create hyperlinks to individual profile
  entries.

DDlog v1.1.0

[1.1.0] - Nov 12, 2021

Rust API changes

• Feature-gate AnyDeserialize impl. The DDlog compiler generates an
  implementation of the AnyDeserialize trait, which allows clients to
  deserialize instances of ddlog_std::Any provided they know relation id of
  the value being deserialized. This feature is not used by most applications,
  but can cause significant code bloat and slow down compilation. We
  feature-gate this impl, so that only users who require this functionality
  have to pay the price.

DDlog v1.0.0

[1.0.0] - Nov 9, 2021

Self-profiler revamp

The self-profiler remains a useful tool for troubleshooting DDlog performance
issues. It runs with low overhead, allows enabling/disabling CPU and change
profiling at runtime to only instrument parts of the program, and because it is
integrated into the DDlog runtime it can precisely match each DD operator to the
corresponding DDlog operator. DDshow does not currently have these features.

In this release we revamp the self profiler to improve its ergonomics. The new
self-profiler has the following features:

• Produces profiles in the form of interactive HTML tables. Each
  row in the table represents a DD operator and contains operator
  description, e.g., "Arrange relation 'Rel1' by 'x,y,z'" along with
  links to one or more source code location that this operator
  corresponds to (e.g., all locations where this specific arrangement
  of 'Rel1' is used).

• The new dump_profile API dumps the profile into an HTML file
  on the disk instead of returning it as a string. All profiles
  generated by the same process are generated in the same folder, even
  if the process creates multiple instances of DDlog. This folder
  also contains a complete snapshot of all DDlog code in the
  program, so that the profiler can show program sources even when
  the program does not run on the same system where it was compiled.

• Internally, the self-profiler represents profiles using a
  well-defined JSON format. New APIs were added to extract
  each of the four profiles currently supported by DDlog (arrangement
  size profile, peak arrangement size profile, change profile, and
  CPU profile) in the JSON format, for automatic processing by
  third-party tools.

DDlog v1.0.0-alpha

This release includes a revamped self-profiler as a feature preview for testing and evaluation only.

DDlog v0.50.0

[0.50.0] - Oct 20, 2021

Libraries

• internment.dl: optimized the implementation of Intern::default() to avoid
  excessive heap allocations and contention.

API changes

• ddlog_clone(): C and Java API to clone a ddlog_record.

Bug fixes

• Fixed parser bug caused by grammar ambiguity whereby index could be interpreted
  as part of an index declaration or as a regular identifier.

DDlog v0.49.0

[0.49.0] - Oct 4, 2021

New features

• Rust compilation option checked_weights for the code generated by
  DDlog, which will crash DDlog programs at runtime if they overflow the
  weights attached to data values. This may be preferable to generating
  incorrect results.

• Add queryIndex Java API (#1093)

Bug fixes

• Closures that depend on generic types generate invalid Rust (#1072).

FlatBuffers

• Upgrade to FlatBuffers v2.0.0. The previous version of FlatBuffers used in
  DDlog is not compatible with recent OS X releases.

SQL-to-DDlog compiler

• Add support for identity views for input tables in DDlogJooqProvider (#1094)
• Translate vector-type fields properly in DDlogJooqProvider (#1089)
• Expose DDlogJooqProvider DSLContext (#1086)
• Windows and Joins work when columns have alias (#1087)

DDlog v0.48.2

[0.48.2] - Sep 13, 2021

Bug fixes

• Fixed a bug in the implementation of Intern<> that could lead to incorrect
  behavior of comparison operators and hashXXX() functions.