kandi X-RAY | cockroach Summary
kandi X-RAY | cockroach Summary
CockroachDB is a distributed SQL database built on a transactional and strongly-consistent key-value store. It scales horizontally; survives disk, machine, rack, and even datacenter failures with minimal latency disruption and no manual intervention; supports strongly-consistent ACID transactions; and provides a familiar SQL API for structuring, manipulating, and querying data. For more details, see our FAQ or architecture document.
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Trending Discussions on cockroach
I have a data frame called ldat_1. I want create a new column called
language from the
In the new
language column, I need two factor levels called
To create that
language column, using the levels of
Condition column, I want
"T2" "T3" "T4" "T5" "T6" to become
"TM2" "TM3" "TM4" "TM5" "TM6" to become
hear is my some code:...
ANSWERAnswered 2022-Mar-30 at 10:16
In base R, use
grepl to detect if
"TM", if so, assign
"malay", otherwise assign
"english". This works fine since you have only two possibilities.
I'm trying to make a little game for my girlfriend to test my abilities with basic coding structures in python 3.10. I keep running into issues either with the program not running at all or getting infinite loopbacks using while True. another issue I have had is that when the else statement is triggered the computer simply moves on to the next line of code and won't loop back.
for this program specifically, it's a little "choose 1 2 or 3" program. I call it Cat Doors. you start off by choosing your cat 1 2 or 3 and they have names that display. if you enter a number or an input that is not 1 2 or 3 it spits out a statement telling you (well her my gf) to try again. I wanted it to loop back if the input was not 1 2 or 3 but I can't get it to cooperate. if the other statements triggered with 1 2 or 3 then it would ideally move on to the next line of code. another issue I was having was that the program closes after the last line is executed. I'm really new to this so please go easy on me haha....
ANSWERAnswered 2022-Mar-22 at 01:16
how does this work for you:
How to return for loop values without any html template in flask , in the below code I need to get all jokes values having multiple jokes route but i want them to be displayed as a list one below the other , currently the output I am getting is as a whole list item , I am aware i can use jinja for this but here i want to do without creating any html page...
ANSWERAnswered 2022-Jan-28 at 09:55
you can use this function, adding a
separator between each joke:
when there is concurrent updates happening on the same record, transaction 1 is able to update but as per the cockroach database documentation transaction t2 should be on queue, but transaction t2 is immediately failing. Do we need to add any other configuration to make transaction wait in queue instead of it throwing an immedaite retry transaction error. Thanks in advance...
ANSWERAnswered 2022-Jan-10 at 14:27
Yes, the client should handle transaction retry errors. Note that whenever possible, CockroachDB will auto-retry a transaction internally without notifying the client. CockroachDB will only send a serialization error to the client when it cannot resolve the error automatically without client-side intervention. In this case, cockroach provides client side tools to manually or automatically retry the txn. See the docs here.
While performing write/read operations in cockroach database with springboot, we are getting below error intermittently. Any solutions here is appreciated. Thanks
org.postgresql.util.PSQLException: ERROR: restart transaction: TransactionRetryWithProtoRefreshError: ReadWithinUncertaintyIntervalError: read at time 1640760553.619962171,0 encountered previous write with future timestamp
ANSWERAnswered 2022-Jan-03 at 13:40
The documentation states that this error is a sign of contention. It also suggests four ways of solving it:
- Be prepared to retry on uncertainty (and other) errors, as described in client-side retry handling.
- Use historical reads with SELECT ... AS OF SYSTEM TIME.
- Design your schema and queries to reduce contention. For more information about how contention occurs and how to avoid it, see Understanding and avoiding transaction contention. In particular, if you are able to send all of the statements in your transaction in a single batch, CockroachDB can usually automatically retry the entire transaction for you.
- If you trust your clocks, you can try lowering the --max-offset option to cockroach start, which provides an upper limit on how long a transaction can continue to restart due to uncertainty.
Did you already try these?
I was trying to migrate from Another RDBMS to cockroachDB but I think there is no such functionality like stored procedures in Cockroach. So what is the best alternative to make a stored procedure in cockroachDB ?...
ANSWERAnswered 2021-Jul-29 at 17:39
CockroachDB does not support stored procedures and the best alternative would depend on the problem you are trying to solve. A few examples:
- If the stored procedure contains business logic, we'd recommend moving that logic to the application.
- Simple stored procedures that contain a single DML statement should be moved into the application's DataAccess logic.
- More complex stored procedures that contain explicit transactions or error code should be moved to the application-level transactions.
EDIT: Stored Procedures as a Litmus Test, an article by Joe Emison, compares Stored Procedures to other solutions. It may be helpful in understanding alternatives.
I'll run a command that will push output to a FIFO file in the file system.
In bash, I can write
timeout 3000 cat server_fifo>server.url to wait until either the fifo was pushed an output, or it reaches the 3000 timeout.
I wonder how we can do this in golang, i.e. keep waiting for the output of an fifo file, and set a timeout for this wait.
Per matishsiao's gist script here, I know we can do...
ANSWERAnswered 2021-Nov-08 at 05:50
This is a simple boilerplate you can use:
Is there a way to turn off the the recording of time series data in a single node cluster via some start up flags? I'm using cockroachdb version 20.1.2.
It appears this property will turn it off...
ANSWERAnswered 2021-Aug-25 at 14:19
There is no other way.
Building and storing timeseries is a cluster-wide job and is controlled through cluster settings.
This is distinct from node-level features that can be controlled through command line flags.
You can find some details on this on the cluster settings page:
In contrast to cluster-wide settings, node-level settings apply to a single node. They are defined by flags passed to the cockroach start command when starting a node and cannot be changed without stopping and restarting the node.
I have created a list of map of antigens(elements) and added some antigens into another list i.e. selected. I want the color of the list item to be red if it is contained in the selected list. But it doesn't show color change even on printing the selected items the antigen is present there....
ANSWERAnswered 2021-Aug-21 at 20:10
Because you probably don't have equality operators in your model of antigens.
You either do that, or create a list containing the names of antigens for example.
Why I cant connect to cockroachdb via powershell ?
I use this command:...
ANSWERAnswered 2021-Jun-21 at 16:05
I wonder if there's an issue with special characters in the shell. Having never used PowerShell this is only a guess, but does it work if you put the URL string in quotes?
No vulnerabilities reported
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