func getStats(sess sqlbuilder.Database) (map[string]int, error) {
stats := make(map[string]int)
res, err := sess.Driver().(*sql.DB).Query(`SHOW GLOBAL STATUS LIKE '%stmt%'`)
if err != nil {
return nil, err
}
var result struct {
VariableName string `db:"Variable_name"`
Value int `db:"Value"`
}
iter := sqlbuilder.NewIterator(res)
for iter.Next(&result) {
stats[result.VariableName] = result.Value
}
return stats, nil
}
// FindTablePrimaryKeys allows sqladapter find a table's primary keys.
func (d *database) FindTablePrimaryKeys(tableName string) ([]string, error) {
pk := make([]string, 0, 1)
stmt := exql.RawSQL(fmt.Sprintf("PRAGMA TABLE_INFO('%s')", tableName))
rows, err := d.Query(stmt)
if err != nil {
return nil, err
}
columns := []struct {
Name string `db:"name"`
PK int `db:"pk"`
}{}
if err := sqlbuilder.NewIterator(rows).All(&columns); err != nil {
return nil, err
}
maxValue := -1
for _, column := range columns {
if column.PK > 0 && column.PK > maxValue {
maxValue = column.PK
}
}
if maxValue > 0 {
for _, column := range columns {
if column.PK > 0 {
pk = append(pk, column.Name)
}
}
}
return pk, nil
}