Hi Eugene,
In community wiki there are several "under the hood" documents like [1].
Unfortunately there is no document about SQL. It seems that such document
would be useful for you and many others. Perhaps, if you have habit to
document your findings (in blogs or somewhere else) it could become
v
Hello!
I recommend starting with H2TreeIndex class. Maybe dropping mails on
developer list with precise questions.
Regards,
--
Ilya Kasnacheev
пн, 17 сент. 2018 г. в 16:25, eugene miretsky :
> Thanks!
>
> I am curious about the process of loading data from Ignite to H2 on the
> fly, as H2 cre
Thanks!
I am curious about the process of loading data from Ignite to H2 on the
fly, as H2 creating indexes but storing them in Ignite. Can you point me to
some JIRAs that discuss it, or which part of the code is responsible for
that?
On Mon, Sep 17, 2018 at 9:18 AM Ilya Kasnacheev
wrote:
> Hel
Hello!
1. 1. H2 executes the query, during which it has to load rows from tables,
and Ignite does the row loading part. Then Ignite will collect query
results on all nodes and aggregate them on a single node.
1. 2. Index is created by H2, but it is stored in Ignite pages (?).
2. Maybe you're right
Thanks!
1.
1. "Ignite feeds H2 rows that it asks for, and H2 creates indexes on
them and executes queries on them." - what exactly do you mean
by that? Do
you mean that all parts of a query that use indexes are executed by H2,
then the actual data is retrieved from Ignite
Hello!
1. H2 does not store data but, as far as my understanding goes, it created
SQL indexes from data. Ignite feeds H2 rows that it asks for, and H2
creates indexes on them and executes queries on them.
2. Ignite always has special index on your key (since it's a key-value
storage it can always
Hello,
Please find below link to SQL documentation :
https://apacheignite-sql.readme.io/docs/overview
You will find answers to most of your queries here.
1. H2 is only used as SQL query parsing engine and for generating execution
plans. Data was/is always stored in Caches.
3. All kind of quer
Hello,
Trying to understand how exactly SQL queries are executed in Ignite. A few
questions
1. To what extent is H2 used? Does it store the data? Does it create the
indexes? Is it used only for generating execution plans? I believe that all
the data used to be stored in H2, but with the
