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How can we trace BeginTransaction(), RollbackTransaction() and CommitTransaction()?

See original GitHub issue

Discussed in https://github.com/linq2db/linq2db/discussions/3073

^{Originally posted by ww9 June 24, 2021} Hi, I’ve been trying to log SQL queries like this and it works but it doesn’t tell me about transactions which are important to my log.

Environment details

linq2db version: Release 4.0.0-preview.1 Database Server: MariaDB 10.4 Database Provider: MySql.Data 8.0.25 Operating system: Windows 10 x64 .NET Framework: .NET 5.0

Trace setup

LinqToDB.Data.DataConnection.TraceSwitch.Level = TraceLevel.Verbose;
LinqToDB.Data.DataConnection.OnTrace = (TraceInfo info) =>
{
   System.Diagnostics.Debug.WriteLine("\n\n" + info.Operation.ToString() + "." 
      + info.TraceInfoStep + " @@@@@@@@@@@@@@@@\n" + info.SqlText);
};
LinqToDB.Data.DataConnection.TurnTraceSwitchOn();

Application code

db.BeginTransaction();
db.UserAgent.Value(u => u.Hash, "hash").Value(u => u.AgentString, "agent").Insert();
db.RollbackTransaction();

Output (missing any information about transactions):

ExecuteNonQuery.BeforeExecute @@@@@@@@@@@@@@@@
-- Default MySql.Official MySql
DECLARE @Hash VarChar(4) -- String
SET     @Hash = 'hash'
DECLARE @AgentString VarChar(5) -- String
SET     @AgentString = 'agent'

INSERT INTO `app`.`user_agent`
(
	`Hash`,
	`AgentString`
)
VALUES
(
	@Hash,
	@AgentString
)

ExecuteNonQuery.AfterExecute @@@@@@@@@@@@@@@@
-- Default MySql.Official MySql
DECLARE @Hash VarChar(4) -- String
SET     @Hash = 'hash'
DECLARE @AgentString VarChar(5) -- String
SET     @AgentString = 'agent'

INSERT INTO `app`.`user_agent`
(
	`Hash`,
	`AgentString`
)
VALUES
(
	@Hash,
	@AgentString
)

DisposeQuery.Completed @@@@@@@@@@@@@@@@
-- Default MySql.Official MySql
DECLARE @Hash VarChar(4) -- String
SET     @Hash = 'hash'
DECLARE @AgentString VarChar(5) -- String
SET     @AgentString = 'agent'

INSERT INTO `app`.`user_agent`
(
	`Hash`,
	`AgentString`
)
VALUES
(
	@Hash,
	@AgentString
)

How can I trace transaction start, rollback and commit?

</div>

Issue Analytics

State:
Created 2 years ago
Reactions:1
Comments:6 (6 by maintainers)

Top GitHub Comments

1reaction

MaceWinducommented, Jun 25, 2021

Also there are Async versions of those API - they should be also logged

1reaction

MaceWinducommented, Jun 25, 2021

@vw9, btw, if you will send PR, introduce new TraceOperation entries for begin/commit/rollback

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