func tableColumnExist(db *sql.DB, table, column string) (bool, error) {
dbname, err := dbutil.DbQueryStr(db, `SELECT DATABASE();`)
if err != nil {
return false, err
}
q := `SELECT count(*) FROM information_schema.COLUMNS WHERE TABLE_SCHEMA = ? AND TABLE_NAME = ? AND COLUMN_NAME = ?`
cnt, err := dbutil.DbQueryI(db, q, dbname, table, column)
return cnt > 0, err
}
func tableExist(db *sql.DB, table string) (bool, error) {
str, err := dbutil.DbQueryStr(db, `show tables like ?`, table)
return str != "", err
}