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PODumping MySQL tables to JSON with Golang
 

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  1. PODumping MySQL tables to JSON with Golang
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    <p>Was putting together a quick dumper for MySQL to JSON in Go. However I find that everything that I retrieve from the database is a <code>[]byte</code> array. Thus instead of native JSON integers or booleans, I'm getting everything encoded as strings.</p> <p>Subset of the code:</p> <pre><code>import ( "encoding/json" "database/sql" _ "github.com/go-sql-driver/mysql" ) func dumpTable(w io.Writer, table) { // ... rows, err := Query(db, fmt.Sprintf("SELECT * FROM %s", table)) checkError(err) columns, err := rows.Columns() checkError(err) scanArgs := make([]interface{}, len(columns)) values := make([]interface{}, len(columns)) for i := range values { scanArgs[i] = &amp;values[i] } for rows.Next() { err = rows.Scan(scanArgs...) checkError(err) record := make(map[string]interface{}) for i, col := range values { if col != nil { fmt.Printf("\n%s: type= %s\n", columns[i], reflect.TypeOf(col)) switch t := col.(type) { default: fmt.Printf("Unexpected type %T\n", t) case bool: fmt.Printf("bool\n") record[columns[i]] = col.(bool) case int: fmt.Printf("int\n") record[columns[i]] = col.(int) case int64: fmt.Printf("int64\n") record[columns[i]] = col.(int64) case float64: fmt.Printf("float64\n") record[columns[i]] = col.(float64) case string: fmt.Printf("string\n") record[columns[i]] = col.(string) case []byte: // -- all cases go HERE! fmt.Printf("[]byte\n") record[columns[i]] = string(col.([]byte)) case time.Time: // record[columns[i]] = col.(string) } } } s, _ := json.Marshal(record) w.Write(s) io.WriteString(w, "\n") } } </code></pre>
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    1. PTQuestion
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    1. USkoblas
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    1. VO
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      1. VTUpMod
    1. COwhat output are you trying to create? That would be helpful in understanding what you're asking for. When I hear "dumping mysql" I think of `show tables` and `describe tablex`, but I'm not sure if that's what you're wanting.
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      1. USBrenden
    2. COThe ```SELECT * FROM %s", table``` statement - thus the contents of the table
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      1. USkoblas
    3. COI don't know how to get the result set without specifying the types of the columns. I'll retract my answer since it didn't satisfy the question.
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      1. PODumping MySQL tables to JSON with Golang
      1. USrexposadas
 

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