func (b *Backend) Inspect(db *sql.DB, m driver.Model) (*sql.Table, error) {
var database string
if err := db.QueryRow("SELECT DATABASE() FROM DUAL").Scan(&database); err != nil {
return nil, err
}
return b.SqlBackend.Inspect(db, m, database)
}
func (b *Backend) HasIndex(db *sql.DB, m driver.Model, idx *index.Index, name string) (bool, error) {
var exists int
err := db.QueryRow("SELECT 1 FROM pg_class WHERE relname = $1 AND relkind = 'i'", name).Scan(&exists)
if err == sql.ErrNoRows {
err = nil
}
return exists != 0, err
}
func (b *Backend) Insert(db *sql.DB, m driver.Model, query string, args ...interface{}) (driver.Result, error) {
fields := m.Fields()
if fields.AutoincrementPk {
q := query + " RETURNING " + fields.MNames[fields.PrimaryKey]
var id int64
err := db.QueryRow(q, args...).Scan(&id)
// We need to perform a "real" insert to find the real error, so
// just let the code fall to the Exec at the end of the function
// if there's an error.
if err == nil {
return insertResult(id), nil
}
}
return db.Exec(query, args...)
}