errors.As is meant to check whether err (or other error in its chain) can be assigned to the value that target is pointing at. Let's consider this example: errors.As(err, &pgx.ErrNoRows) pgx.ErrNoRows (and pgx.ErrTxClosed) is typed as error, thus in all errors.As calls, the target is typed as *error. Err is always an error. So this call is basically asking whether error can be assigned to error. If err != nil, this is always true, thus this check doesn't make any sense over a plain err != nil. Go 1.19 now checks this issue and if it's found, it refuses to compile the code, see: https://go-review.googlesource.com/c/tools/+/339889 This commit changes usages of errors.As() to errors.Is(). The Is() method doesn't check assignability but equality (the only different between Is() and a plain old == operator is that Is() also inspects the whole error chain). This fixes the check because now, we are basically checking if err (or any other error in its chain) == pgx.ErrTxClosed which is exactly what we want. Signed-off-by: Ondřej Budai <ondrej@budai.cz> |
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| dbjobqueue.go | ||