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Always defer *sql.Rows.Close and consult with Err (#844)

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* Always defer *sql.Rows.Close and consult with Err

database/sql.Rows.Next() makes sure to call Close only after exhausting
result rows which would NOT happen when returning early from a bad Scan.
Close being idempotent makes it a great candidate to get always deferred
regardless of what happens later on the result set.

This change also makes sure call Err() after exhausting Next() and
propagate non-nil results from it as the documentation advises.

Closes #764

Signed-off-by: Kiril Vladimiroff <kiril@vladimiroff.org>

* Override named result parameters in last returns

Signed-off-by: Kiril Vladimiroff <kiril@vladimiroff.org>

* Do the same over new changes that got merged

Signed-off-by: Kiril Vladimiroff <kiril@vladimiroff.org>

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
This commit is contained in:
Kiril Vladimiroff 2020-02-11 16:12:21 +02:00 • committed by GitHub
parent d45f869cdd
commit d5dbe546e4
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24 changed files with 81 additions and 49 deletions
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2
federationsender/storage/postgres/joined_hosts_table.go
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@ -132,5 +132,5 @@ func joinedHostsFromStmt(
})
}
return result, nil
return result, rows.Err()
}