I want to Scan a sql.Row into a slice like so:
func printRows(rows *sql.Rows){
defer rows.Close()
for rows.Next() {
var row = []interface{}{}
err := rows.Scan(row...)
if err != nil {
log.Fatal(err)
}
r, err := json.Marshal(row)
if err != nil {
log.Fatal(err)
}
log.Println("row:", r);
}
}
but I am getting this error:
2020/02/23 20:05:14 raw query: SELECT * FROM user_table LIMIT 500 2020/02/23 20:05:14 sql: expected 6 destination arguments in Scan, not 0
anyone know how to make this generic without using a slice?
You can do it this way:
cols, err := rows.Columns() // Remember to check err afterwards
vals := make([]interface{}, len(cols))
for i, _ := range cols {
vals[i] = new(string)
}
for rows.Next() {
err = rows.Scan(vals...)
}
on the inte.net they say you can use:
vals[i] = new(sql.RawBytes)
instead of
vals[i] = new(string)
but I think (string) is fine, idk
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