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database/sql: clarify behavior of DB.Close

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It wasn't clear for existing docs if DB.Close forcefully closed
connections or waited for them to finish.

Fixes #23753

Change-Id: Id7df31224c93181c8d01bab7b0b23da25b42a288
Reviewed-on: https://go-review.googlesource.com/103397
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Daniel Theophanes 2018-03-29 10:01:27 -07:00
parent 8e43c37229
commit 7a7b63f3e7
1 changed files with 3 additions and 1 deletions
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4
src/database/sql/sql.go
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@ -738,7 +738,9 @@ func (db *DB) Ping() error {
return db.PingContext(context.Background())
}
// Close closes the database, releasing any open resources.
// Close closes the database and prevents new queries from starting.
// Close then waits for all queries that have started processing on the server
// to finish.
//
// It is rare to Close a DB, as the DB handle is meant to be
// long-lived and shared between many goroutines.