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Questions tagged [dirtyread]

40 questions
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Java : Dirty Check for ArrayList?

How can I perform a dirty check on an ArrayList in Java? I have an object Animal { String animalName; String animalType; String animalPlace } I have two lists: List animalList1 = new ArrayList(); List animalList2…
sTg
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Set Isolation level to DIRTY READ in Entity Framework with Informix

Is there a way to set isolation levels in Entity Framework 5 with Informix database or LOCK MODE TO WAIT? I have tried to set isolation using SQL query, at the time of DbContext object creation. var dataContext = new DatabaseNameContext(); …
Explore
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How to make Dirty Read?

Will this be an example of Dirty Read? T1 & T2 transactions SET IMPLICIT_TRANSACTIONS OFF Dirty read example
ARCY_MAT
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Will the select interfered by DML

When using clean read (Read committed)... Will a select query be interfered by another DML (Insert, Update, Delete) query ? If yes, can you provide some cases. I'm using SQL Server 2005. What is the possiblity the below query will be yield…
The King
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Dirty CoW patch on CentOS 7.2 - kernel-debuginfo

While working on a temporary fix for my servers, for Dirty-COW , I discovered what seems to be a bug in CentOS 7. The bug seems to be wrong kernel version of a kernel-debuginfo package. Here is the kernel version: # uname…
user6400520
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Data access strategy for a site like SO - sorted SQL queries and simultaneous updates that affect the sort?

I'm working on a Grails web app that would be similar in access patterns to StackOverflow or MyLifeIsAverage - users can vote on entries, and their votes are used to sort a list of entries based on the number of votes. Votes can be placed while the…
Kaleb Brasee
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How to compare two images pixel by pixel and frame new image from the dirty part of image

I am capturing the screen using robot.screenCapture() and frame bufferedImage1. Again I am capturing desktop screen and frame bufferedImage2. Could please tell me how to compare these 2 images (bufferedImage1 and bufferedImage2) pixel by pixel. If…
mini
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How to capture dirty parts of screen in java?

I am developing RDP Application. Where server has to send the dirty parts of the screen and client has to update that part of image. I am able to send the total screen of desktop using Robot class as BufferedImage bufferedImage =…
mini
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How Read Committed Isolation Level prevents dirty reads

i start with a simple question: according to Dirty Read definition in Wikipedia and Msdn : we have 2 concurrent transactions, T1 and T2 Dirty Reads Occur in ,when T1 is Updating a row and T2 is reading row that "is not Committed yet" by T1 but at…
raoof hojat
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check BigQuery table status before querying

I just wonder if there's any way to check if the target table is being written data or it's safe to make query and read data from it. Something like table status (unreadable, dirty, clean, etc) would be great. I tried to use api and get job…
Vincent Y
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How to handle Concurrency issue?

How to handle Concurrency issue? I am sending two files.1 file from frontend UI and 1 file from backend. Suppose File A content is Hello I am XYZ Suppose File B content is Hello I am ABC When i am sending the files at the same time then the both…
chetan kambli
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Dirty read example using ISOLATION LEVELS

For teaching purposes I want to provide an example with dirty reads. Using the READ_UNCOMMITED isolation level. However I am not able to get this example working. I tried many different things but it still does not work. So I hope you are able to…
Marinus
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Dirty read problem- updation in database after transaction doing dirty read commits

Suppose we have 2 transactions as T1, T2 with T2 doing dirty read on data modified by T1 and committing before T1. Now suppose T1 fails and is rolled back. My question is- Since T2 is committed, changes made by T2 are transferred from shared buffer…
AMAN GUPTA
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MySQL dirty reads vs dirty reads defined in SQL standard

From MySQL manual: READ UNCOMMITTED SELECT statements are performed in a nonlocking fashion, but a possible earlier version of a row might be used. Thus, using this isolation level, such reads are not consistent. This is also called a dirty read.…
Croco
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Avoid dirty/phantom reads while selecting from database

I have two tables A and B. My transactions are like this: Read -> read from table A Write -> write in table B, write in table A I want to avoid dirty/phantom reads since I have multiple nodes making request to same database. Here is an example:…
Raghunandan J
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