table.express | Use dplyr verbs to build data.table expressions | Data Visualization library

by asardaes R Version: v0.4.0 License: MPL-2.0

X-Ray Key Features Code Snippets(1)Community Discussions(5)Vulnerabilities Install Support

kandi X-RAY | table.express Summary

table.express is a R library typically used in Analytics, Data Visualization applications. table.express has no bugs, it has no vulnerabilities, it has a Weak Copyleft License and it has low support. You can download it from GitHub.

Use dplyr verbs to build data.table expressions

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Quality

Security

License

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Support

table.express has a low active ecosystem.

It has 63 star(s) with 4 fork(s). There are 4 watchers for this library.

It had no major release in the last 12 months.

There are 0 open issues and 21 have been closed. On average issues are closed in 7 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of table.express is v0.4.0

Quality

table.express has 0 bugs and 0 code smells.

Security

table.express has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

table.express code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

table.express is licensed under the MPL-2.0 License. This license is Weak Copyleft.

Weak Copyleft licenses have some restrictions, but you can use them in commercial projects.

Reuse

table.express releases are available to install and integrate.

Installation instructions are not available. Examples and code snippets are available.

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table.express Key Features

No Key Features are available at this moment for table.express.

table.express Examples and Code Snippets

Table express,Essence

Lines of Code : 7

License : Weak Copyleft (MPL-2.0)

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# the expression is what matters here, input is left empty
data.table() %>%
    start_expr %>%
    select(col) %>%
    where(var == val) %>%
    order_by(v)
#> .DT_[var == val, list(col)][order(v)]

Community Discussions

Trending Discussions on table.express

Custom aggregate function in flink type hint

PyFlink UDAF InternalRow vs. Row

Got "pyflink.util.exceptions.TableException: findAndCreateTableSource failed." when running PyFlink example

Why does Flink FileSystem sink splits into multiple files

Invalid constant for day-time interval: org.apache.flink.table.api.ApiExpression

QUESTION

Custom aggregate function in flink type hint

Asked 2021-Sep-29 at 16:46

I'm experimenting with Apache Flink for a project. I'm using Flink to aggregate environment data captured by a series of sensors. In order to calculate an air quality index I'm trying to implement a custom aggregate function to use in the grouped select with a window, but I have a problem with type hint. Here's the function code with the DataTypeHint annotation:

...

ANSWER

Answered 2021-Sep-29 at 16:46

The string version of a data type hint only works with SQL types. For POJOs and other classes, you can use @DataTypeHint(bridgedTo = AQIAccumulator.class).

Alternatively, you can simply override getTypeInference and provide all components programmatically.

But for your example Flink should be smart enough to derive all types automatically using reflection. No hints required.

Source https://stackoverflow.com/questions/69378764

QUESTION

PyFlink UDAF InternalRow vs. Row

Asked 2021-Jun-23 at 11:11

I'm trying to call an outer function through custom UDAF in PyFlink. The function I use requires the data to be in a dictionary object. I tried to use row(t.rowtime, t.b, t.c).cast(schema) to achieve such effect.

Outside the UDAF, this expression works well. Inside the UDAF, this expression is translated to InternalRow which cannot be converted into a dictionary object.

Is there a way to force UDAF to use Row instead of InternalRow?

...

ANSWER

Answered 2021-Jun-23 at 11:11

Thanks for reporting the issue. It is a bug. I have created a JIRA https://issues.apache.org/jira/browse/FLINK-23121 to fix it. It will be fixed in the release 1.13.2

Source https://stackoverflow.com/questions/68026832

QUESTION

Got "pyflink.util.exceptions.TableException: findAndCreateTableSource failed." when running PyFlink example

Asked 2021-Apr-28 at 14:39

I am running below PyFlink program (copied from https://ci.apache.org/projects/flink/flink-docs-release-1.12/dev/python/table_api_tutorial.html)

...

ANSWER

Answered 2021-Mar-16 at 02:07

The problem is that the legacy DataSet you are using does not support the FileSystem connector you declared. You can use blink Planner to achieve your needs.

Source https://stackoverflow.com/questions/66632765

QUESTION

Why does Flink FileSystem sink splits into multiple files

Asked 2021-Mar-15 at 09:26

I want to use Flink to read from an input file, do some aggregation, and write the result to an output file. The job is in batch mode. See wordcount.py below:

...

ANSWER

Answered 2021-Mar-15 at 09:26

The first time you ran it without having specified the parallelism, and so you got the default parallelism -- which is greater than 1 (probably 4 or 8, depending on how many cores your computer has).

Flink is designed to be scalable, and to achieve that, parallel instances of an operator, such as a sink, are decoupled from one another. Imagine, for example, a large cluster with 100s or 1000s of nodes. For this to work well, each instance needs to write to its own file.

The commas were changed to tabs because you specified .field_delimiter('\t').

Source https://stackoverflow.com/questions/66634813

QUESTION

Invalid constant for day-time interval: org.apache.flink.table.api.ApiExpression

Asked 2021-Jan-08 at 18:16

I have following simple code that performs processing time based tumble window, with table api, but an exception throws when I run it. I have no idea about what it is talking about, could someone help take a look?Thanks!

The Stock case class is defined as follows:

case class Stock(id: String, trade_date: Timestamp, price: Double)

The application code is:

...

ANSWER

Answered 2021-Jan-08 at 18:15

The error message is really not clear, although what's going on is a clash between the java syntax and the scala syntax for the tumbling window expression.

This is the java syntax for a tumbling window, and doesn't seem to be accepted by the scala API:

Source https://stackoverflow.com/questions/65574796

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install table.express

You can download it from GitHub.

Support

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