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Update tutorial-12-mysql_cli.md

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xiehan
2024-09-12 20:03:55 +08:00
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@@ -265,7 +265,7 @@ Since it is a highly concurrent asynchronous client, this means that the client
### 1\. Creating and initializing WFMySQLConnection
When creating a WFMySQLConnection, you need to pass in globally unique **id**, and the subsequent calls on this WFMySQLConnection will use this id to find the corresponding unique connection.
When creating a WFMySQLConnection, you need to pass in **id**, and the subsequent calls on this WFMySQLConnection will use this id and url to find the corresponding unique connection.
When initializing a WFMySQLConnection, you need to pass a URL, and then you do not need to set the URL for the task created on this connection.
@@ -311,6 +311,10 @@ WFMySQLConnection is equivalent to a secondary factory. In the framework, we arr
### 3\. Cautions
Do not generate new connection id infinitely, becauase easy id will occupy a little memory. The connection will be put to an internal connection pool if user didn't run a disconnect task, and will been reused by another WFMySQLConnection object initialized with the same id and url.
Running tasks on the same connection parallelly will fail with error **EAGAIN**.
If you have started `BEGIN` but have not `COMMIT` or `ROLLBACK` during the transaction and the connection has been interrupted during the transaction, the connection will be automatically reconnected internally by the framework, and you will get **ECONNRESET** error in the next task request. In this case, the transaction statements those have not been `COMMIT` would be expired and you may need to send them again.
### 4\. Preparation