After several studies I see that MySQL applies gap blocking where it is not necessary. That's why I want to ask this question, is it something determi ...
After several studies I see that MySQL applies gap blocking where it is not necessary. That's why I want to ask this question, is it something determi ...
I need a example, please What do you mean by applying the lock to a pseudo-record? https://dev.mysql.com/doc/refman/8.0/en/innodb-locking.html#innod ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-locking.html#innodb-record-locks Record Locks A record lock is a lock on an index record. For exa ...
I have the following query, and I wanted to use the diagram to CONFIRM IF I UNDERSTAND IT RIGHT: "pk" is the primary key I am having trouble und ...
https://dev.mysql.com/doc/refman/8.0/en/innodb-locking.html#innodb-intention-locks Record Locks A record lock is a lock on an index record. ...
I have the following query that uses the psql SKIP LOCKED feature to poll messages from a queue table sorted by the insertion time. My subquery also l ...
I am developing a bank API and I have a question about row lock. I have transaction table, client table and account table and I store user balance in ...
I am new to Postgres(even to SQL). I am building a key DB which has a table named Key. My question is how can I perform the following on pg. If one c ...
I'm trying to convert a database from MsSQL to MySQL. How exactly should the transaction configuration be done in MySQL for the Serializable isolatio ...
I was trying to understand ROWLOCK in SQL server to update a record after locking it. Here is my observation and would like to get a confirm if ROWLOC ...
I have a situation where I have multiple (potentially hundreds) threads repeating the same task (using a java scheduled executor, if you are curious). ...
We have implemented an WordAddin and use EF6 to connect to the oracle database. With the addin the user can load a document from the database. After e ...
I have requirement where we need to update the row without holding the lock for the while updating. Here is the details of the requirements, we will ...
The situation: PostgresSQL database. Application with SQL Alchemy ORM (not really important). Table with millions of rows. Hundreds of processes ac ...
I'm writing some code that uses row level locking with MySQL (innodb backend). The pseudocode is: I can't find on the mysql documentation info on ...
What is the default row-level lock mode used in PostgreSQL? And because the question is related to Sequelize ORM, so, it would be nice to know which m ...
I'm trying to perform an operation on a MySQL database table using the InnoDB storage engine. This operation is an INSERT-or-UPDATE type operation whe ...
I am experiencing row lock contention in my oracle DB. I tried to kill some session to unlock them, but this rows are still locked. I know exact which ...
I'm studying about MySQL and how it works, and something confuses me and I don't find any clear explanation on the web about this. What exactly is t ...
Let me start my question with an SQL example. Here is the table setup: Create table x and y. With y.x refers to x.id. Insert a row into x (id= ...