Should be use the database name from the configuration when query pg database size?

[GangZhuo]

The following 201 lines of code: rows, err := db.Query("select pg_database_size('homer_data');")

heplify-server/rotator/rotator.go

Lines 195 to 218 in 90a8a5b

	func (r *Rotator) GetDatabaseSize(db *sql.DB, schema string) (float64, error) {
	var databaseSize string
	var size float64
	var err error
	switch schema {
	case "maxusage":
	rows, err := db.Query("select pg_database_size('homer_data');")
	checkDBErr(err)
	if err == nil {
	if rows.Next() {
	err = rows.Scan(&databaseSize)
	if err != nil {
	logp.Err("%v", err)
	return 0, err
	}
	}
	size, err = strconv.ParseFloat(databaseSize, 64)
	} else {
	logp.Err("Error maxusage: %v", err)
	return 0, err
	}
	default:
	rows, err := db.Query("select * from sys_df();")
	checkDBErr(err)