func (mi *Indexer) SchemaVersion() (version int, err os.Error) {
var client *mysql.Client
client, err = mi.getConnection()
if err != nil {
return
}
defer mi.releaseConnection(client)
err = client.Query("SELECT value FROM meta WHERE metakey='version'")
if err != nil {
return
}
res, err := client.UseResult()
if err != nil {
return
}
row := res.FetchRow()
if row == nil {
return 0, nil
}
version, err = strconv.Atoi(row[0].(string))
client.FreeResult()
return
}
func dbExists(db *mysql.Client, dbname string) bool {
check(db.Query("SHOW DATABASES"))
result, err := db.UseResult()
check(err)
defer result.Free()
for {
row := result.FetchRow()
if row == nil {
break
}
if row[0].(string) == dbname {
return true
}
}
return false
}
func (mi *Indexer) IsAlive() (ok bool, err os.Error) {
var client *mysql.Client
client, err = mi.getConnection()
if err != nil {
return
}
defer mi.releaseConnection(client)
err = client.Query("SELECT 1 + 1")
if err != nil {
return
}
_, err = client.UseResult()
if err != nil {
return
}
client.FreeResult()
return true, nil
}