no error description in golang when trying to read the table names of a ms-access db

Question

I try to read out the table names of an Access database (aka. an mdb-file) in go. My code is pretty much a mixture of an example of how to use the go-driver and the stackoverflow answer on how to get the table names from an mdb file.

The result is the the text

get table names

on the command-line which means that the row log.Fatal("get table names", err) got triggered. But as a golang-beginner, i don't know why this happened because the error message seems to be empty, so i don't get any further information.

package main

import (
    "database/sql"
    "fmt"
    "log"
    _ "github.com/mattn/go-adodb"
)

func main() {
    mdbFilePath := "./register.mdb"

    db, err := openAccessDb(mdbFilePath)
    if err != nil {
        log.Fatal("open file error:", err)
    }

    tableNames, err := getTableNames(db)
    if err != nil {
        log.Fatal("get table names", err)
    }

    if len(tableNames) <= 0 {
        fmt.Println("no tables found in " + mdbFilePath)
        return
    }
    // print out all the table names
    for index, tableName := range tableNames {
        fmt.Printf("table {%d}: {%s}\n", index+1, tableName)
    }
}

func openAccessDb(mdbFilePath string) (*sql.DB, error) {
    db, err := sql.Open(
        "adodb",
        "Provider=Microsoft.Jet.OLEDB.4.0;Data Source="+mdbFilePath+";")
    return db, err
}

func getTableNames(db *sql.DB) ([]string, error) {
    rows, err := db.Query(
        `SELECT MSysObjects.Name AS table_name
        FROM MSysObjects
        WHERE (((Left([Name],1))<>"~")
        AND ((Left([Name],4))<>"MSys")
        AND ((MSysObjects.Type) In (1,4,6)))
        order by MSysObjects.Name`)
    if err != nil {
        return nil, err
    }
    defer rows.Close()

    tableNames := make([]string, 4)
    for rows.Next() {
        var name string
        if err := rows.Scan(&name); err != nil {
            return nil, err
        }
        tableNames = append(tableNames, name)
    }
    if err := rows.Err(); err != nil {
        return nil, err
    }

    return tableNames, nil
}

UPDATE

the error comes from the select-query. But i don't know how to fix this as this comes, as mentioned, directly from another stackoverflow answer