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Posted to dev@drill.apache.org by "lifeng.wang@baifendian.com" <li...@baifendian.com> on 2015/01/08 04:39:56 UTC
转发: drill support mysql?
你好：
请问drill目前是否支持mysql
如果我自己想开发一套连接mysql的插件我该怎么做？
Hello:
Does the drill is currently supports mysql
If I want to develop a set of connection mysql plugin what should I do?
lifeng.wang@baifendian.com
Re: drill support mysql?
Posted by Yash Sharma <ya...@gmail.com>.
Hey Matthew,
Welcome to Drill.
Its great to have you volunteering. Thanks.
What are the parts you would be interested in? Would you like to explore
the JsonRecordReader and HBase/Mongo Plugin ?
These are the components in a good state and there is lot to learn from
these. I would love to work with you on any issues/doubts you have and we
can continue on new development.
Regarrds
On Fri, Feb 27, 2015 at 10:25 PM, Matthew Burgess <ma...@gmail.com>
wrote:
> I am interested in participating w.r.t. JDBC topics, both the storage
> plugin
> and Drill's JDBC driver. Unfortunately I haven't had much time to
> contribute, but if there are smaller tasks I could take, I would definitely
> be interested.
>
> Regards,
> Matt
>
> From: Yash Sharma <ya...@gmail.com>
> Reply-To: <de...@drill.apache.org>
> Date: Friday, February 27, 2015 at 11:45 AM
> To: "dev@drill.apache.org" <de...@drill.apache.org>
> Subject: Re: drill support mysql?
>
> Hi All/Linfeng,
> I would like to explore the options here and am reopening the thread for
> more information on the work done so far and to get more fellow
> contributors interested in the same.
>
> Thanks,
> Yash
>
> On Fri, Jan 16, 2015 at 12:57 AM, Jason Altekruse <
> altekrusejason@gmail.com>
> wrote:
>
> > That's what we were thinking. This would make the only work that needs
> to
> > be done is to implement a mapping between Enumerable and value vectors
> for
> > getting the data into Drill.
> >
> > Linfeng, does this sound like something you would be interested in
> trying
> > to contribute to Drill?
> >
> > -Jason
> >
> > On Thu, Jan 15, 2015 at 10:59 AM, Julian Hyde <ju...@gmail.com>
> > wrote:
> >
> >> > Calcite has a JDBC adapter, so it can convert parts of the query
> plan to
> >> > SQL and execute it in the JDBC source. Generally you want to push
> down as
> >> > much as possible. It works with MySQL and pretty much any JDBC data
> > source.
> >> >
> >> > Drill uses Calcite internally, so if Drill exposed Calcite adapters
> as
> >> > data sources this problem would be solved.
> >> >
> >> > Julian
> >> >
> >>> > > On Jan 15, 2015, at 10:30 AM, Jason Altekruse <
> > altekrusejason@gmail.com>
> >> > wrote:
> >>> > >
> >>> > > Hello Linfeng!
> >>> > >
> >>> > > Welcome to the Drill community!
> >>> > >
> >>> > > Currently drill does not support querying traditional databases
> like
> >> > MySQL,
> >>> > > but it is a feature we have discussed adding for some time. If
> you are
> >>> > > interested in trying to add your own, you can start by taking a
> look at
> >>> > > some of the existing storage plugins. For a basic overview of the
> > process
> >>> > > of populating the in memory data structure for records in Drill, I
> > would
> >>> > > recommend reading through the Json reader implementation. While
> the in
> >>> > > memory format for Drill is columnar, to allow for various
> execution
> >>> > > optimizations, a simple row-by-row interface is provided for
> writing
> > into
> >>> > > the data structure.
> >>> > >
> >>> > >
> >> >
> >
> >
> https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/a
> > pache/drill/exec/vector/complex/fn/JsonReader.java
> >>> > >
> >>> > > Another important aspect of creating a storage plugin is
> leveraging the
> >>> > > underlying systems capabilities to avoid reading an entire
> dataset for
> >> > each
> >>> > > query. We have a system in place for pushing down filters and
> selected
> >>> > > columns to the underlying storage layer. This is not necessary to
> be
> > able
> >>> > > to run queries in Drill, as you can simply read all of the data
> out of
> >> > the
> >>> > > storage system and let Drill filter it out as necessary, but for
> many
> >>> > > workloads this will obviously be sub-optimal in many cases ( just
> about
> >>> > > anything but a select *). For an example of some of this filter
> > rewriting
> >>> > > you can see the work done on the Mongo plugin.
> >>> > >
> >>> > >
> >> >
> >
> >
> https://github.com/apache/drill/tree/master/contrib/storage-mongo/src/main/jav
> > a/org/apache/drill/exec/store/mongo
> >>> > >
> >>> > > An important thing to note here is that the filters have to be
> > rewritten
> >>> > > from Drill convention to Mongo convention. In the case of a MySQL
> > plugin,
> >>> > > the storage system really could perform any sql operations that
> require
> >>> > > only the tables within your MySQL instance and likely further
> optimize
> >>> > > those subsets of the queries. To implement this functionality, we
> could
> >> > go
> >>> > > far beyond what we have implemented with other storage plugins in
> terms
> >> > of
> >>> > > pushdown, which requires more complex rewriting. Thankfully a
> > dependency
> >>> > > that Drill is already leveraging for its planning, calcite, has
> the
> >>> > > capabilities to do these types of more complex pushdowns already.
> It
> > uses
> >>> > > an Enumerable interface (a fancy iterator) to expose data from
> one of
> > its
> >>> > > storage engines, such as a relational database, calcite includes a
> >> > simpler
> >>> > > single node execution engine that can actually act much like
> Drill for
> >>> > > smaller workloads. Likely the best first step for getting MySQL
> working
> >>> > > would be to write a Drill storage plugin that takes an Enumerable
> as
> >> > input,
> >>> > > then we should be able to leverage all of calcite's existing
> >> > functionality
> >>> > > for doing the query rewrites and pushdowns relatively easily.
> >>> > >
> >>> > > -Jason Altekruse
> >>> > >
> >>> > > On Wed, Jan 7, 2015 at 7:39 PM, lifeng.wang@baifendian.com <
> >>> > > lifeng.wang@baifendian.com> wrote:
> >>> > >
> >>>> > >> 你好：
> >>>> > >> 请问drill目前是否支持mysql
> >>>> > >> 如果我自己想开发一套连接mysql的插件我该怎么做？
> >>>> > >>
> >>>> > >> Hello:
> >>>> > >> Does the drill is currently supports mysql
> >>>> > >> If I want to develop a set of connection mysql plugin what
> should I
> > do?
> >>>> > >>
> >>>> > >>
> >>>> > >>
> >>>> > >>
> >>>> > >> lifeng.wang@baifendian.com
> >>>> > >>
> >> >
> >> >
> >
>
>
>
>
Re: drill support mysql?
Posted by Matthew Burgess <ma...@gmail.com>.
I am interested in participating w.r.t. JDBC topics, both the storage plugin
and Drill's JDBC driver. Unfortunately I haven't had much time to
contribute, but if there are smaller tasks I could take, I would definitely
be interested.
Regards,
Matt
From: Yash Sharma <ya...@gmail.com>
Reply-To: <de...@drill.apache.org>
Date: Friday, February 27, 2015 at 11:45 AM
To: "dev@drill.apache.org" <de...@drill.apache.org>
Subject: Re: drill support mysql?
Hi All/Linfeng,
I would like to explore the options here and am reopening the thread for
more information on the work done so far and to get more fellow
contributors interested in the same.
Thanks,
Yash
On Fri, Jan 16, 2015 at 12:57 AM, Jason Altekruse <al...@gmail.com>
wrote:
> That's what we were thinking. This would make the only work that needs to
> be done is to implement a mapping between Enumerable and value vectors for
> getting the data into Drill.
>
> Linfeng, does this sound like something you would be interested in trying
> to contribute to Drill?
>
> -Jason
>
> On Thu, Jan 15, 2015 at 10:59 AM, Julian Hyde <ju...@gmail.com>
> wrote:
>
>> > Calcite has a JDBC adapter, so it can convert parts of the query plan to
>> > SQL and execute it in the JDBC source. Generally you want to push down as
>> > much as possible. It works with MySQL and pretty much any JDBC data
> source.
>> >
>> > Drill uses Calcite internally, so if Drill exposed Calcite adapters as
>> > data sources this problem would be solved.
>> >
>> > Julian
>> >
>>> > > On Jan 15, 2015, at 10:30 AM, Jason Altekruse <
> altekrusejason@gmail.com>
>> > wrote:
>>> > >
>>> > > Hello Linfeng!
>>> > >
>>> > > Welcome to the Drill community!
>>> > >
>>> > > Currently drill does not support querying traditional databases like
>> > MySQL,
>>> > > but it is a feature we have discussed adding for some time. If you are
>>> > > interested in trying to add your own, you can start by taking a look at
>>> > > some of the existing storage plugins. For a basic overview of the
> process
>>> > > of populating the in memory data structure for records in Drill, I
> would
>>> > > recommend reading through the Json reader implementation. While the in
>>> > > memory format for Drill is columnar, to allow for various execution
>>> > > optimizations, a simple row-by-row interface is provided for writing
> into
>>> > > the data structure.
>>> > >
>>> > >
>> >
>
> https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/a
> pache/drill/exec/vector/complex/fn/JsonReader.java
>>> > >
>>> > > Another important aspect of creating a storage plugin is leveraging the
>>> > > underlying systems capabilities to avoid reading an entire dataset for
>> > each
>>> > > query. We have a system in place for pushing down filters and selected
>>> > > columns to the underlying storage layer. This is not necessary to be
> able
>>> > > to run queries in Drill, as you can simply read all of the data out of
>> > the
>>> > > storage system and let Drill filter it out as necessary, but for many
>>> > > workloads this will obviously be sub-optimal in many cases ( just about
>>> > > anything but a select *). For an example of some of this filter
> rewriting
>>> > > you can see the work done on the Mongo plugin.
>>> > >
>>> > >
>> >
>
> https://github.com/apache/drill/tree/master/contrib/storage-mongo/src/main/jav
> a/org/apache/drill/exec/store/mongo
>>> > >
>>> > > An important thing to note here is that the filters have to be
> rewritten
>>> > > from Drill convention to Mongo convention. In the case of a MySQL
> plugin,
>>> > > the storage system really could perform any sql operations that require
>>> > > only the tables within your MySQL instance and likely further optimize
>>> > > those subsets of the queries. To implement this functionality, we could
>> > go
>>> > > far beyond what we have implemented with other storage plugins in terms
>> > of
>>> > > pushdown, which requires more complex rewriting. Thankfully a
> dependency
>>> > > that Drill is already leveraging for its planning, calcite, has the
>>> > > capabilities to do these types of more complex pushdowns already. It
> uses
>>> > > an Enumerable interface (a fancy iterator) to expose data from one of
> its
>>> > > storage engines, such as a relational database, calcite includes a
>> > simpler
>>> > > single node execution engine that can actually act much like Drill for
>>> > > smaller workloads. Likely the best first step for getting MySQL working
>>> > > would be to write a Drill storage plugin that takes an Enumerable as
>> > input,
>>> > > then we should be able to leverage all of calcite's existing
>> > functionality
>>> > > for doing the query rewrites and pushdowns relatively easily.
>>> > >
>>> > > -Jason Altekruse
>>> > >
>>> > > On Wed, Jan 7, 2015 at 7:39 PM, lifeng.wang@baifendian.com <
>>> > > lifeng.wang@baifendian.com> wrote:
>>> > >
>>>> > >> 你好：
>>>> > >> 请问drill目前是否支持mysql
>>>> > >> 如果我自己想开发一套连接mysql的插件我该怎么做？
>>>> > >>
>>>> > >> Hello:
>>>> > >> Does the drill is currently supports mysql
>>>> > >> If I want to develop a set of connection mysql plugin what should I
> do?
>>>> > >>
>>>> > >>
>>>> > >>
>>>> > >>
>>>> > >> lifeng.wang@baifendian.com
>>>> > >>
>> >
>> >
>
Re: drill support mysql?
Posted by Yash Sharma <ya...@gmail.com>.
Hi All/Linfeng,
I would like to explore the options here and am reopening the thread for
more information on the work done so far and to get more fellow
contributors interested in the same.
Thanks,
Yash
On Fri, Jan 16, 2015 at 12:57 AM, Jason Altekruse <al...@gmail.com>
wrote:
> That's what we were thinking. This would make the only work that needs to
> be done is to implement a mapping between Enumerable and value vectors for
> getting the data into Drill.
>
> Linfeng, does this sound like something you would be interested in trying
> to contribute to Drill?
>
> -Jason
>
> On Thu, Jan 15, 2015 at 10:59 AM, Julian Hyde <ju...@gmail.com>
> wrote:
>
> > Calcite has a JDBC adapter, so it can convert parts of the query plan to
> > SQL and execute it in the JDBC source. Generally you want to push down as
> > much as possible. It works with MySQL and pretty much any JDBC data
> source.
> >
> > Drill uses Calcite internally, so if Drill exposed Calcite adapters as
> > data sources this problem would be solved.
> >
> > Julian
> >
> > > On Jan 15, 2015, at 10:30 AM, Jason Altekruse <
> altekrusejason@gmail.com>
> > wrote:
> > >
> > > Hello Linfeng!
> > >
> > > Welcome to the Drill community!
> > >
> > > Currently drill does not support querying traditional databases like
> > MySQL,
> > > but it is a feature we have discussed adding for some time. If you are
> > > interested in trying to add your own, you can start by taking a look at
> > > some of the existing storage plugins. For a basic overview of the
> process
> > > of populating the in memory data structure for records in Drill, I
> would
> > > recommend reading through the Json reader implementation. While the in
> > > memory format for Drill is columnar, to allow for various execution
> > > optimizations, a simple row-by-row interface is provided for writing
> into
> > > the data structure.
> > >
> > >
> >
> https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/fn/JsonReader.java
> > >
> > > Another important aspect of creating a storage plugin is leveraging the
> > > underlying systems capabilities to avoid reading an entire dataset for
> > each
> > > query. We have a system in place for pushing down filters and selected
> > > columns to the underlying storage layer. This is not necessary to be
> able
> > > to run queries in Drill, as you can simply read all of the data out of
> > the
> > > storage system and let Drill filter it out as necessary, but for many
> > > workloads this will obviously be sub-optimal in many cases ( just about
> > > anything but a select *). For an example of some of this filter
> rewriting
> > > you can see the work done on the Mongo plugin.
> > >
> > >
> >
> https://github.com/apache/drill/tree/master/contrib/storage-mongo/src/main/java/org/apache/drill/exec/store/mongo
> > >
> > > An important thing to note here is that the filters have to be
> rewritten
> > > from Drill convention to Mongo convention. In the case of a MySQL
> plugin,
> > > the storage system really could perform any sql operations that require
> > > only the tables within your MySQL instance and likely further optimize
> > > those subsets of the queries. To implement this functionality, we could
> > go
> > > far beyond what we have implemented with other storage plugins in terms
> > of
> > > pushdown, which requires more complex rewriting. Thankfully a
> dependency
> > > that Drill is already leveraging for its planning, calcite, has the
> > > capabilities to do these types of more complex pushdowns already. It
> uses
> > > an Enumerable interface (a fancy iterator) to expose data from one of
> its
> > > storage engines, such as a relational database, calcite includes a
> > simpler
> > > single node execution engine that can actually act much like Drill for
> > > smaller workloads. Likely the best first step for getting MySQL working
> > > would be to write a Drill storage plugin that takes an Enumerable as
> > input,
> > > then we should be able to leverage all of calcite's existing
> > functionality
> > > for doing the query rewrites and pushdowns relatively easily.
> > >
> > > -Jason Altekruse
> > >
> > > On Wed, Jan 7, 2015 at 7:39 PM, lifeng.wang@baifendian.com <
> > > lifeng.wang@baifendian.com> wrote:
> > >
> > >> 你好：
> > >> 请问drill目前是否支持mysql
> > >> 如果我自己想开发一套连接mysql的插件我该怎么做？
> > >>
> > >> Hello:
> > >> Does the drill is currently supports mysql
> > >> If I want to develop a set of connection mysql plugin what should I
> do?
> > >>
> > >>
> > >>
> > >>
> > >> lifeng.wang@baifendian.com
> > >>
> >
> >
>
Re: drill support mysql?
Posted by Jason Altekruse <al...@gmail.com>.
That's what we were thinking. This would make the only work that needs to
be done is to implement a mapping between Enumerable and value vectors for
getting the data into Drill.
Linfeng, does this sound like something you would be interested in trying
to contribute to Drill?
-Jason
On Thu, Jan 15, 2015 at 10:59 AM, Julian Hyde <ju...@gmail.com> wrote:
> Calcite has a JDBC adapter, so it can convert parts of the query plan to
> SQL and execute it in the JDBC source. Generally you want to push down as
> much as possible. It works with MySQL and pretty much any JDBC data source.
>
> Drill uses Calcite internally, so if Drill exposed Calcite adapters as
> data sources this problem would be solved.
>
> Julian
>
> > On Jan 15, 2015, at 10:30 AM, Jason Altekruse <al...@gmail.com>
> wrote:
> >
> > Hello Linfeng!
> >
> > Welcome to the Drill community!
> >
> > Currently drill does not support querying traditional databases like
> MySQL,
> > but it is a feature we have discussed adding for some time. If you are
> > interested in trying to add your own, you can start by taking a look at
> > some of the existing storage plugins. For a basic overview of the process
> > of populating the in memory data structure for records in Drill, I would
> > recommend reading through the Json reader implementation. While the in
> > memory format for Drill is columnar, to allow for various execution
> > optimizations, a simple row-by-row interface is provided for writing into
> > the data structure.
> >
> >
> https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/fn/JsonReader.java
> >
> > Another important aspect of creating a storage plugin is leveraging the
> > underlying systems capabilities to avoid reading an entire dataset for
> each
> > query. We have a system in place for pushing down filters and selected
> > columns to the underlying storage layer. This is not necessary to be able
> > to run queries in Drill, as you can simply read all of the data out of
> the
> > storage system and let Drill filter it out as necessary, but for many
> > workloads this will obviously be sub-optimal in many cases ( just about
> > anything but a select *). For an example of some of this filter rewriting
> > you can see the work done on the Mongo plugin.
> >
> >
> https://github.com/apache/drill/tree/master/contrib/storage-mongo/src/main/java/org/apache/drill/exec/store/mongo
> >
> > An important thing to note here is that the filters have to be rewritten
> > from Drill convention to Mongo convention. In the case of a MySQL plugin,
> > the storage system really could perform any sql operations that require
> > only the tables within your MySQL instance and likely further optimize
> > those subsets of the queries. To implement this functionality, we could
> go
> > far beyond what we have implemented with other storage plugins in terms
> of
> > pushdown, which requires more complex rewriting. Thankfully a dependency
> > that Drill is already leveraging for its planning, calcite, has the
> > capabilities to do these types of more complex pushdowns already. It uses
> > an Enumerable interface (a fancy iterator) to expose data from one of its
> > storage engines, such as a relational database, calcite includes a
> simpler
> > single node execution engine that can actually act much like Drill for
> > smaller workloads. Likely the best first step for getting MySQL working
> > would be to write a Drill storage plugin that takes an Enumerable as
> input,
> > then we should be able to leverage all of calcite's existing
> functionality
> > for doing the query rewrites and pushdowns relatively easily.
> >
> > -Jason Altekruse
> >
> > On Wed, Jan 7, 2015 at 7:39 PM, lifeng.wang@baifendian.com <
> > lifeng.wang@baifendian.com> wrote:
> >
> >> 你好：
> >> 请问drill目前是否支持mysql
> >> 如果我自己想开发一套连接mysql的插件我该怎么做？
> >>
> >> Hello:
> >> Does the drill is currently supports mysql
> >> If I want to develop a set of connection mysql plugin what should I do?
> >>
> >>
> >>
> >>
> >> lifeng.wang@baifendian.com
> >>
>
>
Re: drill support mysql?
Posted by Julian Hyde <ju...@gmail.com>.
Calcite has a JDBC adapter, so it can convert parts of the query plan to SQL and execute it in the JDBC source. Generally you want to push down as much as possible. It works with MySQL and pretty much any JDBC data source.
Drill uses Calcite internally, so if Drill exposed Calcite adapters as data sources this problem would be solved.
Julian
> On Jan 15, 2015, at 10:30 AM, Jason Altekruse <al...@gmail.com> wrote:
>
> Hello Linfeng!
>
> Welcome to the Drill community!
>
> Currently drill does not support querying traditional databases like MySQL,
> but it is a feature we have discussed adding for some time. If you are
> interested in trying to add your own, you can start by taking a look at
> some of the existing storage plugins. For a basic overview of the process
> of populating the in memory data structure for records in Drill, I would
> recommend reading through the Json reader implementation. While the in
> memory format for Drill is columnar, to allow for various execution
> optimizations, a simple row-by-row interface is provided for writing into
> the data structure.
>
> https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/fn/JsonReader.java
>
> Another important aspect of creating a storage plugin is leveraging the
> underlying systems capabilities to avoid reading an entire dataset for each
> query. We have a system in place for pushing down filters and selected
> columns to the underlying storage layer. This is not necessary to be able
> to run queries in Drill, as you can simply read all of the data out of the
> storage system and let Drill filter it out as necessary, but for many
> workloads this will obviously be sub-optimal in many cases ( just about
> anything but a select *). For an example of some of this filter rewriting
> you can see the work done on the Mongo plugin.
>
> https://github.com/apache/drill/tree/master/contrib/storage-mongo/src/main/java/org/apache/drill/exec/store/mongo
>
> An important thing to note here is that the filters have to be rewritten
> from Drill convention to Mongo convention. In the case of a MySQL plugin,
> the storage system really could perform any sql operations that require
> only the tables within your MySQL instance and likely further optimize
> those subsets of the queries. To implement this functionality, we could go
> far beyond what we have implemented with other storage plugins in terms of
> pushdown, which requires more complex rewriting. Thankfully a dependency
> that Drill is already leveraging for its planning, calcite, has the
> capabilities to do these types of more complex pushdowns already. It uses
> an Enumerable interface (a fancy iterator) to expose data from one of its
> storage engines, such as a relational database, calcite includes a simpler
> single node execution engine that can actually act much like Drill for
> smaller workloads. Likely the best first step for getting MySQL working
> would be to write a Drill storage plugin that takes an Enumerable as input,
> then we should be able to leverage all of calcite's existing functionality
> for doing the query rewrites and pushdowns relatively easily.
>
> -Jason Altekruse
>
> On Wed, Jan 7, 2015 at 7:39 PM, lifeng.wang@baifendian.com <
> lifeng.wang@baifendian.com> wrote:
>
>> 你好：
>> 请问drill目前是否支持mysql
>> 如果我自己想开发一套连接mysql的插件我该怎么做？
>>
>> Hello:
>> Does the drill is currently supports mysql
>> If I want to develop a set of connection mysql plugin what should I do?
>>
>>
>>
>>
>> lifeng.wang@baifendian.com
>>
Re: drill support mysql?
Posted by Jason Altekruse <al...@gmail.com>.
Hello Linfeng!
Welcome to the Drill community!
Currently drill does not support querying traditional databases like MySQL,
but it is a feature we have discussed adding for some time. If you are
interested in trying to add your own, you can start by taking a look at
some of the existing storage plugins. For a basic overview of the process
of populating the in memory data structure for records in Drill, I would
recommend reading through the Json reader implementation. While the in
memory format for Drill is columnar, to allow for various execution
optimizations, a simple row-by-row interface is provided for writing into
the data structure.
https://github.com/apache/drill/blob/master/exec/java-exec/src/main/java/org/apache/drill/exec/vector/complex/fn/JsonReader.java
Another important aspect of creating a storage plugin is leveraging the
underlying systems capabilities to avoid reading an entire dataset for each
query. We have a system in place for pushing down filters and selected
columns to the underlying storage layer. This is not necessary to be able
to run queries in Drill, as you can simply read all of the data out of the
storage system and let Drill filter it out as necessary, but for many
workloads this will obviously be sub-optimal in many cases ( just about
anything but a select *). For an example of some of this filter rewriting
you can see the work done on the Mongo plugin.
https://github.com/apache/drill/tree/master/contrib/storage-mongo/src/main/java/org/apache/drill/exec/store/mongo
An important thing to note here is that the filters have to be rewritten
from Drill convention to Mongo convention. In the case of a MySQL plugin,
the storage system really could perform any sql operations that require
only the tables within your MySQL instance and likely further optimize
those subsets of the queries. To implement this functionality, we could go
far beyond what we have implemented with other storage plugins in terms of
pushdown, which requires more complex rewriting. Thankfully a dependency
that Drill is already leveraging for its planning, calcite, has the
capabilities to do these types of more complex pushdowns already. It uses
an Enumerable interface (a fancy iterator) to expose data from one of its
storage engines, such as a relational database, calcite includes a simpler
single node execution engine that can actually act much like Drill for
smaller workloads. Likely the best first step for getting MySQL working
would be to write a Drill storage plugin that takes an Enumerable as input,
then we should be able to leverage all of calcite's existing functionality
for doing the query rewrites and pushdowns relatively easily.
-Jason Altekruse
On Wed, Jan 7, 2015 at 7:39 PM, lifeng.wang@baifendian.com <
lifeng.wang@baifendian.com> wrote:
> 你好：
> 请问drill目前是否支持mysql
> 如果我自己想开发一套连接mysql的插件我该怎么做？
>
> Hello:
> Does the drill is currently supports mysql
> If I want to develop a set of connection mysql plugin what should I do?
>
>
>
>
> lifeng.wang@baifendian.com
>