marble | high performance in-memory hive sql engine | SQL Database library
kandi X-RAY | marble Summary
kandi X-RAY | marble Summary
A high performance in-memory hive sql engine based on Apache Calcite
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Top functions reviewed by kandi - BETA
- Evaluates the UDF instance variable
- Generates an expression for a list of arguments
- Generate an UDF instance declaration
- Define implementors for Hive operators
- Register UDAF classes
- Gets the operator in SqlStd operator table
- Infers the return type of the given operator binding
- New instance of GenericUDF
- Creates a DataTable from a JDBC ResultSet
- Get SqlTypeName for given jdbc type
- Converts cast to cast
- Execute a SQL query
- Evaluate the cast result
- Entry point to the database
- Execute an iterate over the given parameters
- Perform constant reduction
- Infers the return type
- Builds initial statements for the HBaseUDF instanceHolder
- Call a hive udf
- Create a RexExecutable for the query
- Converts the row to Map
- Gets the table environment
- Create queryable table
- Creates DataTable from sqlList
- Do not NULL add
- Infers the type of the operation that is returned for the given operator
marble Key Features
marble Examples and Code Snippets
Community Discussions
Trending Discussions on marble
QUESTION
Trying to understand event driven microservices; like in this video. It seems like the basic idea is "producers create tasks that change the state of a system. Consumers read all relevant tasks (from whatever topic they care about) and make decisions off that"
So, if I had a system of jars- say a red, blue, and green jar (topics). And then had producers adding marbles to each jar (deciding color based on random number, let's say). The producers would tell kafka "add a marble to red. Add a marble to blue... etc" Then, the consumers, every time we wanted to count jars would get the entire log and say "ok, a marble was added to red, so redCount++, then a marble was added to blue so blueCount++..." for the dozens/hundreds/thousands of lines that the log file takes up?
That can't be correct; I know it can't be correct. It seems incredibly inefficient; almost anti-efficient!
What am I missing in my knowledge of kafka tasks?
...ANSWER
Answered 2021-Jun-08 at 16:06The data in each of those topics will be retained as per a property log.retention.{hours|minutes|ms}
. At the Kafka server level, this is set to 7 days by default for all topics. You could change this at a topic level as well.
In such a setting, a consumer will not be able to read the entire history if it needed to, so in this instance typically a consumer would:
- consume the message i.e. "a marble no. 5 was added to red jar" at offset number 5
- carry out the increment step i.e.
redCount++
and store the latest information (redCount = 5
) in a local state store - Then commit the offset back to Kafka telling that it has read the message at offset number 5
- Then, just wait for the next message...
If however, your consumer doesn't have a local state store - In this case, you would need to increase the retention period i.e. log.retention.ms=-1
to store the data forever. You could configure the configure the consumers to store that information locally in memory but in the event of failures there would be no choice but for the consumers to read from the beginning. This I agree is inefficient.
QUESTION
I am working out of "HTML5 and CSS5 Illustrated Complete" Second Edition by Sasha Vodnik. I did the initial Unit D example to a Tee, however logo styling and the positioning aren't applying correctly or at all.
...ANSWER
Answered 2021-Feb-16 at 19:29Add top: 0;
to your header in CSS. It should look like this:
QUESTION
Been getting this error when running 'ng build' on my Angular 12.0.2 project
...ANSWER
Answered 2021-Jun-02 at 17:41We figured it out. As you can see in our packages.json
, we have a dependency on webpack
. It seems angular-devkit/build-angular
does as well. We believe this created the known issue of multiple webpacks colliding and causing issues. Removing our dependency on webpack
fixed the issue.
QUESTION
I havet this codepen: https://codepen.io/sp2012/pen/VwpyWdp . Unfortunately, this code is too advanced for me. The game has three maps. I want to keep only the first map and when the game is finished, if you click on the map the game restarts.
The code follows:
This is the HTML:
...ANSWER
Answered 2021-Jun-01 at 06:17Just comment out the second and third level section of the levels[0] object (maps). Change the HTML content that makes reference to other levels.
QUESTION
I have an issue using the operator. Basically I have multiple payslips and I want to keep a debounce for each payslip and trigger a query. I want to subscribe to only the last query that succeed for a specific payslip and if a new request is triggered for this payslip before the previous one finished, I want to cancel the previous one.
Here's a sample marble diagram for what i'm looking for:
-----1----1-----1----3----3----3----3-----1---3---1---3---1------>
(magic operators for which I'm unclear)
-------------------1-------------------3-----1---3---1---3---1--->
I have debounce and query, which I like, but it does this:
-----1----1-----1----3----3----3----3-----1---3---1---3---1------>
debounce
-------------------1-------------------3--------------------1---->
...ANSWER
Answered 2021-May-30 at 10:44I am struggling to find anything wrong with your code or it's outcomes.
I have put the following test code in the ThinkRx playground
QUESTION
Consider this angular component:
...ANSWER
Answered 2021-May-24 at 22:45Your main question is:
I would like more granular control of observable behavior. I don't really intend to complete the getStatus() observable.
If you do not want to complete it then it essentially is not a cold observable, its a hot observable, that would mean you can create a subject and pass
QUESTION
Problem: There are R red marbles, G green marbles and B blue marbles (R≤G≤B) Count the number of ways to arrange them in a straight line so that the two marbles next to each other are of different colors.
For example, R=G=B=2, the answer is 30.
I have tried using recursion and of course TLE:
Define r(R,B,G) to be the number of ways of arranging them where the first marble is red. Define b(R,B,G),g(R,B,G) respectively.
Then r(R, B, G) = b(R-1,B,G) + g(R-1,B,G)
And the answer is r(R,B,G) + b(R,B,G) + g(R,B,G)
But we can see that r(R, B, G) = b(B, R, G) ...
So, we just need a function f(x,y,z)=f(y,x−1,z)+f(z,x−1,y)
And the answer is f(x,y,z) + f(y,z,x) + f(z,x,y).
The time limit is 2 seconds.
I don't think dynamic is not TLE because R, G, B <= 2e5
...ANSWER
Answered 2021-May-24 at 15:38Some things to limit the recursion:
- If R>G+B+1, then there is no way to avoid having 2 adjacent reds. (Similar argument for G>R+B+1 & B>R+G+1.)
- If R=G+B+1, then you alternate reds with non-reds, and your problem is reduced to how many ways you can arrange G greens and B blacks w/o worrying about adjacency (and should thus have a closed-form solution). (Again, similar argument for G=R+B+1 and B=R+G+1.)
QUESTION
I need help to create a RXJS stream which does the following.
Input: Keyboard inputevent a to z Emit value if:
- Character has NOT been used before
- Character has been used before but it is more than 5 seconds ago. else discard value
Marble diagram (- is 1 second):
...ANSWER
Answered 2021-May-16 at 13:54You can group your input by character using groupBy
. We can then grab the first occurrence in each group and finally merge everything back. As luck would have it, groupBy
lets us define a duration selector to specify how long a group should live, so if we set that to 5 seconds, we basically "reset" each group after that time:
QUESTION
I need to make a function that takes in a RXJS stream and return an accumulated result for last x minute (or a given timerange) I think this is probably easier to explain if I give an example:
I'll try to illustrate what I want with marble diagrams:
...ANSWER
Answered 2021-May-14 at 16:30Think of every value as having a minute-long lifetime - it "enters" when it's born, and it "exits" when it's finished.
So each value needs to be converted into an observable modeling the enter/exit events. Then all you need is a simple reducer to accumulate the events into the value/count map you want.
Creating a custom operator from this is straightforward. You can parameterize the "lifetime", and even the reducer that handles the enter/exit actions (tons of ways to accumulate and de-accumulate).
QUESTION
I want to group all related dependencies in one merge request (MR), as the examples below:
In one MR (all starting @angular/ except @angular/cli):
...ANSWER
Answered 2021-May-11 at 12:00Apparently it was a bug
https://github.com/renovatebot/renovate/pull/9949
In the version 25.18.5 should be fixed
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install marble
You can use marble like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the marble component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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