将Postgresql数组直接读取到Golang Slice中

Question

I have a query which returns a row with a single column containing an array of strings (character varying[]):

{http://wp.me/p62MJv-Jc,http://tyrant.click/1LGBoD6}

Is there any easy way to read this directly into a Golang slice? E.g.

var arr []string

for rows.Next() {
    rows.Scan(&arr)
    fmt.Println(len(arr))
}

Produces:

0

Answer 1

As mentioned by Victor in the comments on the original post, this post answers the question well with its explanation of pg.Array().

Taken directly from the link:

To read a Postgres array value into a Go slice, use:

func getTags(db *sql.DB, title string) (tags []string) {
    // the select query, returning 1 column of array type
    sel := "SELECT tags FROM posts WHERE title=$1"

    // wrap the output parameter in pq.Array for receiving into it
    if err := db.QueryRow(sel, title).Scan(pq.Array(&tags)); err != nil {
        log.Fatal(err)
    }

    return
}

I've just got this working in a project of my own as well, so can confirm it works.