ExecWithRetry executes a single SQL with optional retry.

GetJSON fetches a page and parses it as JSON.

GetRawInfo do what its name tells.

IsContextCanceledError returns whether the error is caused by context cancellation.

IsDirExists checks if dir exists.

IsRetryableError returns whether the error is transient (e.g.

KillMySelf sends sigint to current process, used in integration test only.

PrintInfo prints some information of the app, like git hash, binary build time, etc.

ShouldLogError returns whether the error should be logged.

TransactWithRetry executes an action in a transaction, and retry if the action failed with a retryable error.

UniqueTable returns an unique table name.

Writes a MySQL identifier into the string builder.

AppLogger is a logger for lightning, different from tidb logger.

Version information.

Version information.

Version information.

Version information.

Version information.

LogConfig serializes log related config in toml/json.

OnceError is an error value which will can be assigned once.