CQL | Categorical Query Language IDE | Data Migration library

by CategoricalData Java Version: Current License: AGPL-3.0

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | CQL Summary

CQL is a Java library typically used in Migration, Data Migration applications. CQL has no bugs, it has no vulnerabilities, it has build file available, it has a Strong Copyleft License and it has low support. You can download it from GitHub.

Categorical Query Language IDE

Support

Quality

Security

License

Reuse

Support

CQL has a low active ecosystem.

It has 253 star(s) with 18 fork(s). There are 29 watchers for this library.

It had no major release in the last 6 months.

There are 39 open issues and 31 have been closed. On average issues are closed in 76 days. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of CQL is current.

Quality

CQL has 0 bugs and 0 code smells.

Security

CQL has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

CQL code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

CQL is licensed under the AGPL-3.0 License. This license is Strong Copyleft.

Strong Copyleft licenses enforce sharing, and you can use them when creating open source projects.

Reuse

CQL releases are not available. You will need to build from source code and install.

Build file is available. You can build the component from source.

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

CQL saves you 83714 person hours of effort in developing the same functionality from scratch.

It has 98708 lines of code, 7888 functions and 623 files.

It has high code complexity. Code complexity directly impacts maintainability of the code.

Top functions reviewed by kandi - BETA

kandi has reviewed CQL and discovered the below as its top functions. This is intended to give you an instant insight into CQL implemented functionality, and help decide if they suit your requirements.

Mapping between side
Returns the tabulated text table
Displays the schema
Append the query to the table
Show the algebra table
Populate the base type table
Table transformation
Compute the vertices
Returns a SQL constraint for equality constraints
Create the SQL constraint
Create a constraint
Create the SQL statement to delete the given entity
Create a trigger for a given constraint
Create a delete constraint
Evaluate the constraints
Evaluates the schema
Evaluates a single instance
Evaluates the relation
Gets token list
Displays a JFrame
Evaluate relation
Build the menu
Gets the tabs for this page
Write help
Returns an instance
Computes the best match
Return the query
Evaluate the expression
Returns the java class for the given string
Display summary report
Main method for testing

Get all kandi verified functions for this library.

CQL Key Features

No Key Features are available at this moment for CQL.

CQL Examples and Code Snippets

No Code Snippets are available at this moment for CQL.

Community Discussions

Trending Discussions on CQL

Upgraded Cassandra 3.11 to 4.0, failed with "node with address ... already exists"

JanusGraph Java unable to add vertex/edge

How does gocql client pick the right Tablet server, for any query?

Cassandra (CQL) select IN query with Cassandra4IO

Is it possible to drop a column from AWS Keyspaces table?

Scylla token range select result ordering

Is the Cassandra Getting Started Instructions Broken?

Spring data Cassandra not able to perform Paginaton, after passing the CassandraPageRequest

Converting ECQL from geotools to SQL

QUESTION

Upgraded Cassandra 3.11 to 4.0, failed with "node with address ... already exists"

Asked 2022-Mar-07 at 00:15

we try to upgrade apache cassandra 3.11.12 to 4.0.2, this is the first node we upgrade in this cluster (seed node). we drain the node and stop the service before replace the version.

system log:

...

ANSWER

Answered 2022-Mar-07 at 00:15

During startup, Cassandra tries to retrieve the host ID by querying the local system table with:

Source https://stackoverflow.com/questions/71343502

QUESTION

JanusGraph Java unable to add vertex/edge

Asked 2022-Mar-06 at 13:51

I've been trying to create interact with my JanusGraph setup in docker. But after many tries I still don't succeed.

How I connect to JG.

...

ANSWER

Answered 2022-Mar-06 at 13:51

The GraphTraversal object is only a "plan" to be carried out. To have it take effect, you need a closing method like next, toList, etc., like you did for the count.

The confusion probably arose from the fact that the gremlin console automatically keeps nexting the traversal a configured number of times.

Source https://stackoverflow.com/questions/71369727

QUESTION

How does gocql client pick the right Tablet server, for any query?

Asked 2022-Jan-27 at 09:41

yugabyte cluster has 2 regions, 3 AZs, 6 node architecture.

4 nodes in central region, 2 nodes in east region

...

ANSWER

Answered 2022-Jan-27 at 09:41

How can a client driver know, which tablet server to send the request?

The driver periodically queries this table:

Source https://stackoverflow.com/questions/70828795

QUESTION

Cassandra (CQL) select IN query with Cassandra4IO

Asked 2022-Jan-20 at 22:41

I am using scala with Cassandra4io library. I am trying to perform a select IN query. The parameter of IN is like a tuple (comma separated string values). And it has not worked for me. I tried different approaches.

...

ANSWER

Answered 2022-Jan-20 at 22:41

sorry for the delay on this. It turns out that adding that extra set of parenthesis around your value (in the example above IN (${clientIds})) throws off the string interpolator leading it to select the wrong Binder datatype which is used to serialize the datatype in your query before it sends it off to Cassandra (ouch!).

This selected TEXT instead of List[TEXT]

What you want to do instead is reformulate the query like so:

Source https://stackoverflow.com/questions/70768085

QUESTION

Is it possible to drop a column from AWS Keyspaces table?

Asked 2022-Jan-11 at 14:29

I need to write roll-in and roll-back scripts for AWS Keyspaces. Roll-in is

...

ANSWER

Answered 2022-Jan-11 at 14:29

It looks like you cannot. From the doc mentioned in the original post, the supported syntax is:

Source https://stackoverflow.com/questions/70666066

QUESTION

Scylla token range select result ordering

Asked 2022-Jan-05 at 17:18

Is it guaranteed that rows returned for a token range CQL SELECT query are ordered by token value?

From the article https://www.scylladb.com/2017/02/13/efficient-full-table-scans-with-scylla-1-6/:

ScyllaDB orders partitions by a function of the partition key, known as the partitioner, and also as the token function

I'd like to have it confirmed that it's guaranteed (by a specification) because I'd like to implement efficient "group by partitioning key" without having to read the whole result set into memory. I'm using the latest Java driver for Scylla (not for C*) if that makes any difference.

...

ANSWER

Answered 2022-Jan-05 at 17:18

Yes, it is guaranteed (I am the author of that article).

Source https://stackoverflow.com/questions/70596349

QUESTION

Is the Cassandra Getting Started Instructions Broken?

Asked 2021-Dec-21 at 15:36

I'm trying to get started with Cassandra by following the directions on https://cassandra.apache.org/_/quickstart.html, but step two doesn't make sense. This command: docker run --name cassandra cassandra starts a container. Then the second command (docker run --rm -d --name cassandra --hostname cassandra --network cassandra cassandra) attempts to start another container with the same name which fails because the container already exists. But if it didn't it refers to a network that doesn't exist.

If instead of the first command I run docker network cassandra and then run the second command as given the command in step four (docker run --rm --network cassandra -v "$(pwd)/data.cql:/scripts/data.cql" -e CQLSH_HOST=cassandra -e CQLSH_PORT=9042 nuvo/docker-cqlsh) fails to connect to cassandra.

...

ANSWER

Answered 2021-Dec-21 at 05:49

The Cassandra quick start guide was written with the assumption that users know how to use Docker because that would be out-of-scope for the Apache Cassandra website.

The first docker run command you referred to is a barebones-method of starting Cassandra in a Docker container in the foreground which means that outputs are sent to stdout/stderr.

The second docker run command is the [preferred] alternative which starts the container in the background in detached mode (-d).

You can choose to run one or the other but not both commands. Cheers!

Source https://stackoverflow.com/questions/70430537

QUESTION

Asked 2021-Dec-13 at 00:41

I'm trying to insert data from a .csv file into cassandra by python. my code is reading this list and is connected to Cassandra, but when inserting, it gives the error: cassandra.protocol.SyntaxException: . I printed the query to see errors and it returns something strange.

...

ANSWER

Answered 2021-Dec-13 at 00:41

Actually, after trying all day, I found a way using Pandas to insert all the data from the .csv file: treatment using pd.Dataframe and a "for" inserting item by item, as below:

Source https://stackoverflow.com/questions/70325221

QUESTION

Spring data Cassandra not able to perform Paginaton, after passing the CassandraPageRequest

Asked 2021-Dec-06 at 04:57

Issue:

nextPageStateString is being passed to the client and during the next request its is converted back to Bytebuffer

below line

feedRepository.findAll(cassandraPageRequest); is throwing exception

I was just converting the serializing and deserializing the PageState, not sure why its complaining as I didn't modified the PagingState object.

Questions:

Am i doing the correctly serializing and deserializing the the byte buffer? if not what are other ways of doing it.

...

ANSWER

Answered 2021-Dec-06 at 04:57

Calling bytes.position(0); before CassandraPageRequest.of(pageRequest, bytes); has resolved the issue.

Source https://stackoverflow.com/questions/70234153

QUESTION

Converting ECQL from geotools to SQL

Asked 2021-Nov-23 at 14:14

Is there a java library for converting ECQL(geotools) to SQL ?

CQL and ECQL CQL (Common Query Language) is a query language created by the OGC for the Catalogue Web Services specification.

...

ANSWER

Answered 2021-Nov-23 at 14:14

GeoTools can convert most (many?) filter objects to SQL before sending them to a JDBCDatastore but it usually depends on which database you are targetting. See, for example, org.geotools.data.postgis.PostgisFilterToSQL - you could do something like:

Source https://stackoverflow.com/questions/70081058

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

Vulnerabilities

No vulnerabilities reported

Install CQL

You can download it from GitHub.
You can use CQL 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 CQL 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 .

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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