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From Apache Wiki <>
Subject [Incubator Wiki] Update of "OptiqProposal" by AshutoshChauhan
Date Wed, 30 Apr 2014 22:17:55 GMT
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The "OptiqProposal" page has been changed by AshutoshChauhan:

New page:
= Optiq =
== Abstract ==

Optiq is a framework that allows efficient translation of queries involving heterogeneous
and federated data.

== Proposal ==

Optiq is a highly customizable engine for parsing and planning queries on data in a wide variety
of formats. It allows database-like access, and in particular a SQL interface and advanced
query optimization, for data not residing in a traditional database.

== Background ==

Databases were traditionally engineered in a monolithic stack, providing a data storage format,
data processing algorithms, query parser, query planner, built-in functions, metadata repository
and connectivity layer. They innovate in some areas but rarely in all.

Modern data management systems are decomposing that stack into separate components, separating
data, processing engine, metadata, and query language support. They are highly heterogeneous,
with data in multiple locations and formats, caching and redundant data, different workloads,
and processing occurring in different engines.

Query planning (sometimes called query optimization) has always been a key function of a DBMS,
because it allows the implementors to introduce new query-processing algorithms, and allows
data administrators to re-organize the data without affecting applications built on that data.
In a componentized system, the query planner integrates the components (data formats, engines,
algorithms) without introducing unncessary coupling or performance tradeoffs.

But building a query planner is hard; many systems muddle along without a planner, and indeed
a SQL interface, until the demand from their customers is overwhelming.

There is an opportunity to make this process more efficient by creating a re-usable framework.

== Rationale ==

Optiq allows database-like access, and in particular a SQL interface and advanced query optimization,
for data not residing in a traditional database. It is complementary to many current Hadoop
and NoSQL systems, which have innovative and performant storage and runtime systems but lack
a SQL interface and intelligent query translation.

Optiq is already in use by several projects, including Apache Drill, Apache Hive and Cascading
Lingual, and commercial products.

Optiq's architecture consists of:

An extensible relational algebra.
SPIs (service-provider interfaces) for metadata (schemas and tables), planner rules, statistics,
cost-estimates, user-defined functions.
Built-in sets of rules for logical transformations and common data-sources.
Two query planning engines driven by rules, statistics, etc. One engine is cost-based, the
other rule-based.
Optional SQL parser, validator and translator to relational algebra.
Optional JDBC driver.
== Initial Goals ==

The initial goals are be to move the existing codebase to Apache and integrate with the Apache
development process. Once this is accomplished, we plan for incremental development and releases
that follow the Apache guidelines.

As we move the code into the org.apache namespace, we will restructure components as necessary
to allow clients to use just the components of Optiq that they need.

A version 1.0 release, including pre-built binaries, will foster wider adoption.

== Current Status ==

Optiq has had over a dozen minor releases over the last 18 months. Its core SQL parser and
validator, and its planning engine and core rules, are mature and robust and are the basis
for several production systems; but other components and SPIs are still undergoing rapid evolution.

=== Meritocracy ===

We plan to invest in supporting a meritocracy. We will discuss the requirements in an open
forum. We encourage the companies and projects using Optiq to discuss their requirements in
an open forum and to participate in development. We will encourage and monitor community participation
so that privileges can be extended to those that contribute.

Optiq's pluggable architecture encourages developers to contribute extensions such as adapters
for data sources, new planning rules, and better statistics and cost-estimation functions.
We look forward to fostering a rich ecosystem of extensions.

=== Community ===

Building a data management system requires a high degree of technical skill, and correspondingly,
the community of developers directly using Optiq is potentially fairly small, albeit highly
technical and engaged. But we also expect engagement from members of the communities of projects
that use Optiq, such as Drill and Hive. And we intend to structure Optiq so that it can be
used for lighter weight applications, such as providing a SQL and JDBC interface to a NoSQL

=== Core Developers ===

The developers on the initial committers list are all experienced open source developers,
and are actively using Optiq in their projects.

 * Julian Hyde is lead developer of Mondrian, an open source OLAP engine, and an Apache Drill
 * Chris Wensel is lead developer of Cascading, and of Lingual, the SQL interface to Cascading
built using Optiq.
 * Jacques Nadeau is lead developer of Apache Drill, which uses Optiq.

In addition, there are several regular contributors whom we hope will graduate to committers
during the incubation process.

We realize that additional employer diversity is needed, and we will work aggressively to
recruit developers from additional companies.

=== Alignment ===

Apache, and in particular the ecosystem surrounding Hadoop, contains several projects for
building data management systems that leverage each other's capabilities. Optiq is a natural
fit for that ecosystem, and will help foster projects meeting new challenges.

Optiq is already used by Apache Hive and Apache Drill; Optiq embeds Apache Spark as an optional
engine; we are in discussion with Apache Phoenix about integrating JDBC and query planning.

== Known Risks ==

=== Orphaned Products ===

Optiq is already a key component in three independent projects, each backed by a different
company, so the risk of being orphaned is relatively low. We plan to mitigate this risk by
recruiting additional committers, and promoting Optiq's adoption as a framework by other projects.

=== Inexperience with Open Source ===

The initial committers are all Apache members, some of whom have several years in the Apache
Hadoop community. The founder of the project, Julian Hyde, has been a founder and key developer
in open source projects for over ten years.

=== Homogenous Developers ===

The initial committers are employed by a number of companies, including Concurrent, Hortonworks,
MapR Technologies and We are committed to recruiting additional committers
from outside these companies.

=== Reliance on Salaried Developers ===

Like most open source projects, Optiq receives substantial support from salaried developers.
This is to be expected given that it is a highly technical framework. However, they are all
passionate about the project, and we are confident that the project will continue even if
no salaried developers contribute to the project. As a framework, the project encourages the
involvement of members of other projects, and of academic researchers. We are committed to
recruiting additional committers including non-salaried developers.

=== Relationships with Other Apache Products ===

As mentioned in the Alignment section, Optiq is being used by Apache Hive and Apache Drill,
and has adapters for Apache Phoenix and Apache Spark. Optiq often operates on data in a Hadoop
environment, so collaboration with other Hadoop projects is desirable and highly likely.

=== An Excessive Fascination with the Apache Brand ===

Optiq solves a real problem, as evidenced by its take-up by other projects. This proposal
is not for the purpose of generating publicity. Rather, the primary benefits to joining Apache
are those outlined in the Rationale section.

== Documentation ==

Additional documentation for Optiq may be found on its github site:

 * [[|Overview]]
 * [[|Tutorial]]
 * [[|HOWTO]]
 * [[|Reference guide]]

=== Presentation: ===

| SQL on Big Data using Optiq]]
== Initial Source ==

The initial code codebase resides in three projects, all hosted on github:


=== Source and Intellectual Property Submission Plan ===

The initial codebase is already distributed under the Apache 2.0 License. The owners of the
IP have indicated willingness to sign the SGA.

=== External Dependencies ===

Optiq and Linq4j have the following external dependencies.

 * Java 1.6, 1.7 or 1.8
 * Apache Maven, Commons
 * JavaCC (BSD license)
 * Sqlline 1.1.6 (BSD license)
 * Junit 4.11 (EPL)
 * Janino (BSD license)
 * Guava (Apache 2.0 license)
 * Eigenbase-resgen, eigenbase-xom, eigenbase-properties (Apache 2.0 license)

Some of Optiq's adapters (optiq-csv, optiq-mongodb, optiq-spark, optiq-splunk) are currently
developed alongside core Optiq, and have the following additional dependencies:

 * Open CSV 2.3 (Apache 2.0 license)
 * Apache Incubator Spark
 * Mongo Java driver (Apache 2.0 license)
Upon acceptance to the incubator, we would begin a thorough analysis of all transitive dependencies
to verify this information and introduce license checking into the build and release process
by integrating with Apache Rat.

=== Cryptography ===

Optiq will eventually support encryption on the wire. This is not one of the initial goals,
and we do not expect Optiq to be a controlled export item due to the use of encryption.

== Required Resources ==

=== Mailing Lists ===

 * (will be migrated from

=== Source control ===

The Optiq team would like to use git for source control, due to our current use of git/github.
We request a writeable git repo git://, and mirroring to be
set up to github through INFRA.

=== Issue Tracking ===

Optiq currently uses the github issue tracking system associated with its github repo:
We will migrate to the Apache JIRA:

== Initial Committers ==

 * Julian Hyde (jhyde at apache dot org) 
 * Jacques Nadeau (jacques at apache dot org) 
 * James R. Taylor (jamestaylor at apache dot org) 
 * Chris Wensel (cwensel at apache dot org)

=== Affiliations ===

The initial committers are employees of Concurrent, Hortonworks, MapR and

 * Julian Hyde (Hortonworks)
 * Jacques Nadeau (MapR Technologies)
 * James R. Taylor (
 * Chris Wensel (Concurrent)

== Sponsors ==

=== Champion ===

 * Ashutosh Chauhan (hashutosh at apache dot org)

=== Nominated Mentors ===

 * Ted Dunning (tdunning at apache dot org) – Chief Application Architect at MapR Technologies;
committer for Lucene, Mahout and ZooKeeper.
 * Alan Gates (gates at apache dot org) - Architect at Hortonworks; committer for Pig, Hive
and others.
 * Steven Noels (stevenn at apache dot org) - Chief Technical Officer at NGDATA; committer
for Cocoon and Forrest, mentor for Phoenix.

=== Sponsoring Entity ===

The Apache Incubator.

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