Add upper: prefix to error messages for easier debugging

error.go

@@ -27,26 +27,26 @@ import (
 
 // Shared error messages.
 var (
-	ErrNoMoreRows               = errors.New(`No more rows in this result set.`)
-	ErrNotConnected             = errors.New(`You're currently not connected.`)
-	ErrMissingDatabaseName      = errors.New(`Missing database name.`)
-	ErrMissingCollectionName    = errors.New(`Missing collection name.`)
-	ErrCollectionDoesNotExist   = errors.New(`Collection does not exist.`)
-	ErrSockerOrHost             = errors.New(`You may connect either to a unix socket or a tcp address, but not both.`)
-	ErrQueryLimitParam          = errors.New(`A query can accept only one db.Limit() parameter.`)
-	ErrQuerySortParam           = errors.New(`A query can accept only one db.Sort{} parameter.`)
-	ErrQueryOffsetParam         = errors.New(`A query can accept only one db.Offset() parameter.`)
-	ErrMissingConditions        = errors.New(`Missing selector conditions.`)
-	ErrUnsupported              = errors.New(`This action is currently unsupported on this database.`)
-	ErrUndefined                = errors.New(`This value is undefined.`)
-	ErrQueryIsPending           = errors.New(`Can't execute this instruction while the result set is still open.`)
-	ErrUnsupportedDestination   = errors.New(`Unsupported destination type.`)
-	ErrUnsupportedType          = errors.New(`This type does not support marshaling.`)
-	ErrUnsupportedValue         = errors.New(`This value does not support unmarshaling.`)
-	ErrUnknownConditionType     = errors.New(`Arguments of type %T can't be used as constraints.`)
-	ErrTooManyClients           = errors.New(`Can't connect to database server: too many clients.`)
-	ErrGivingUpTryingToConnect  = errors.New(`Giving up trying to connect: too many clients.`)
-	ErrMissingConnURL           = errors.New(`Missing DSN`)
-	ErrNotImplemented           = errors.New(`Call not implemented`)
-	ErrAlreadyWithinTransaction = errors.New(`Already within a transaction`)
+	ErrNoMoreRows               = errors.New(`upper: no more rows in this result set.`)
+	ErrNotConnected             = errors.New(`upper: you're currently not connected.`)
+	ErrMissingDatabaseName      = errors.New(`upper: missing database name.`)
+	ErrMissingCollectionName    = errors.New(`upper: missing collection name.`)
+	ErrCollectionDoesNotExist   = errors.New(`upper: collection does not exist.`)
+	ErrSockerOrHost             = errors.New(`upper: you may connect either to a unix socket or a tcp address, but not both.`)
+	ErrQueryLimitParam          = errors.New(`upper: a query can accept only one db.Limit() parameter.`)
+	ErrQuerySortParam           = errors.New(`upper: a query can accept only one db.Sort{} parameter.`)
+	ErrQueryOffsetParam         = errors.New(`upper: a query can accept only one db.Offset() parameter.`)
+	ErrMissingConditions        = errors.New(`upper: missing selector conditions.`)
+	ErrUnsupported              = errors.New(`upper: this action is currently unsupported on this database.`)
+	ErrUndefined                = errors.New(`upper: this value is undefined.`)
+	ErrQueryIsPending           = errors.New(`upper: can't execute this instruction while the result set is still open.`)
+	ErrUnsupportedDestination   = errors.New(`upper: unsupported destination type.`)
+	ErrUnsupportedType          = errors.New(`upper: this type does not support marshaling.`)
+	ErrUnsupportedValue         = errors.New(`upper: this value does not support unmarshaling.`)
+	ErrUnknownConditionType     = errors.New(`upper: arguments of type %T can't be used as constraints.`)
+	ErrTooManyClients           = errors.New(`upper: can't connect to database server: too many clients.`)
+	ErrGivingUpTryingToConnect  = errors.New(`upper: giving up trying to connect: too many clients.`)
+	ErrMissingConnURL           = errors.New(`upper: missing DSN`)
+	ErrNotImplemented           = errors.New(`upper: call not implemented`)
+	ErrAlreadyWithinTransaction = errors.New(`upper: already within a transaction`)
 )