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Add note to Writer documentation

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Neil Alexander 2020-08-21 10:37:21 +01:00
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commit a9a5bb5bc5
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internal/sqlutil/writer.go
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@ -36,6 +36,9 @@ import "database/sql"
// will ALWAYS be nil in this mode. This is useful if you just // will ALWAYS be nil in this mode. This is useful if you just
// want to perform a single query on an already-prepared statement // want to perform a single query on an already-prepared statement
// without the overhead of opening a new transaction to do it in. // without the overhead of opening a new transaction to do it in.
//
// You MUST take particular care not to call Do() from within f()
// on the same Writer, or it will likely result in a deadlock.
type Writer interface { type Writer interface {
// Queue up one or more database write operations within the // Queue up one or more database write operations within the
// provided function to be executed when it is safe to do so. // provided function to be executed when it is safe to do so.