MySql.Data.EntityFrameworkCore vs Pomelo.EntityFrameworkCore.MySql [closed]
MySql.Data.EntityFrameworkCore vs Pomelo.EntityFrameworkCore.MySql [closed]
mysql
Proxy TCP stream (MySQL and Redis) with Nginx
I do not think Nginx can be used for what you’re trying to use it for. While it can be used to proxy tcp streams or load balance them, it’s not necessarily knowledgable of the protocol and request structure within them. So to answer your question: from database sharding perspective – is it possible to … Read more
Is it possible to define a timestamp column that is not null and has no default and no special behavior on update?
Timestamp columns are a special case. See here: By default, TIMESTAMP columns are NOT NULL, cannot contain NULL values, and assigning NULL assigns the current timestamp. For more detailed information read up on Data Type Default Values. Specifically that situation applies when not running in strict mode. If running in strict mode, inserting a NULL … Read more
Pandas read sql integer became float
Problem is your data contains NaN values, so int is automatically cast to float. I think you can check NA type promotions: When introducing NAs into an existing Series or DataFrame via reindex or some other means, boolean and integer types will be promoted to a different dtype in order to store the NAs. These … Read more
MySQL listen notify equivalent
Ok, so what I found is that you can make UDF functions in mysql that can do anything but need to be written in C/C++. They can be then called from triggers on updates in database and notify your application when update happened. I saw that there are some security concerns. I did not use … Read more
MySql: Insert a row and get the content
Execute your insert statement and then you can do this: SELECT * FROM `items` WHERE `id`= LAST_INSERT_ID()
MyIsam engine transaction support
MyISAM effectively works in auto-commit mode (as it’s not a transactional engine), and it just ignores the commit/rollback. Actually storage engine is a different layer in the MySQL architecture, separated from the SQL parser, the SQL layer communicates to the storage engine with lower-level API, and that’s the reason there is a common SQL and … Read more
MySQL – SQL_BIG_SELECTS
MySQL determines whether or not a query is a ‘big select’ based on the value of ‘max_join_size’. If the query is likely to have to examine more than this number of rows, it will consider it a ‘big select’. Use ‘show variables’ to view the value of the max join size. I believe that indexing … Read more