Pranav, there are `QueryExecution` that holding logicalPlan, optimizedPlan
and sparkPlan(physical) in Spark:
https://github.com/apache/spark/blob/master/sql/core/src/main/scala/org/apache/spark/sql/execution/QueryExecution.scala
In fact, my code is similar to it. I have an object holding
The general idea is that schemas are created before connections, look the same
to everyone, and continue to live after connections close. You’d be breaking
that principle, so you should be careful.
Maybe you can write a SchemaFactory that can see some of the connection
parameters, maybe via a
Hi Developers ,
Hope you are well .
I would like to modify model.json so that I can pass additional key - value
parameters .
I am able to pass additional parameters with connection URL .
Is it right to modify JsonRoot class ? Or any other way around?
Regards,
Kartik
Ian,
When you say ‘our approach’ and ‘our users’, I guess you are talking about your
organization as opposed to the Calcite community in general. You say you are
‘using JdbcMeta’ but I don’t really understand what that means. Can you expand
on your use case/environment?
I think of Java UDFs
Hello,
Our current approach to defining custom UDFs and their implementations works by…
1. Defining the udf and its implementation in a class member function
2. Creating a Calcite definitions in the form of `schema.Function`s via
`ScalarFunctionImpl.create` or
Pranav,
There is a doc[1] which talks about how to write a rule. You can also take
a look at existing
rules such as FilterTableScanRule[2], ProjectTableScanRule[3] for reference.
[1] https://calcite.apache.org/docs/howto.html#create-a-planner-rule
[2]
Egor,
Calcite's `SqlValidatorImpl` does not support to validate a statement list
now.
You can loop over the list by yourself, and validate one query at a time.
Egor Ryashin 于2022年8月23日周二 17:23写道：
> Hi all,
>
> I try to use validation with multi-statement AST but it fails when I call
>
Hi all,
I try to use validation with multi-statement AST but it fails when I call
validate() with NPE about namespace, I wonder how should I set this namespace:
NlsString ';'
BigDecimal 1
Exception in thread "main" java.lang.NullPointerException: namespace for SELECT
';', scope
