forked from mirror/gorm
144 lines
3.4 KiB
Go
144 lines
3.4 KiB
Go
package gorm
|
|
|
|
import (
|
|
"database/sql"
|
|
"database/sql/driver"
|
|
"fmt"
|
|
"reflect"
|
|
"time"
|
|
|
|
"github.com/lib/pq/hstore"
|
|
)
|
|
|
|
type postgres struct {
|
|
}
|
|
|
|
func (s *postgres) BinVar(i int) string {
|
|
return fmt.Sprintf("$%v", i)
|
|
}
|
|
|
|
func (s *postgres) SupportLastInsertId() bool {
|
|
return false
|
|
}
|
|
|
|
func (s *postgres) HasTop() bool {
|
|
return false
|
|
}
|
|
|
|
func (s *postgres) SqlTag(value reflect.Value, size int) string {
|
|
switch value.Kind() {
|
|
case reflect.Bool:
|
|
return "boolean"
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
|
|
return "integer"
|
|
case reflect.Int64, reflect.Uint64:
|
|
return "bigint"
|
|
case reflect.Float32, reflect.Float64:
|
|
return "numeric"
|
|
case reflect.String:
|
|
if size > 0 && size < 65532 {
|
|
return fmt.Sprintf("varchar(%d)", size)
|
|
}
|
|
return "text"
|
|
case reflect.Struct:
|
|
if _, ok := value.Interface().(time.Time); ok {
|
|
return "timestamp with time zone"
|
|
}
|
|
case reflect.Map:
|
|
if value.Type() == hstoreType {
|
|
return "hstore"
|
|
}
|
|
default:
|
|
if _, ok := value.Interface().([]byte); ok {
|
|
return "bytea"
|
|
}
|
|
}
|
|
panic(fmt.Sprintf("invalid sql type %s (%s) for postgres", value.Type().Name(), value.Kind().String()))
|
|
}
|
|
|
|
func (s *postgres) PrimaryKeyTag(value reflect.Value, size int) string {
|
|
switch value.Kind() {
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
|
|
return "serial PRIMARY KEY"
|
|
case reflect.Int64, reflect.Uint64:
|
|
return "bigserial PRIMARY KEY"
|
|
default:
|
|
panic("Invalid primary key type")
|
|
}
|
|
}
|
|
|
|
func (s *postgres) ReturningStr(tableName, key string) string {
|
|
return fmt.Sprintf("RETURNING %v.%v", s.Quote(tableName), key)
|
|
}
|
|
|
|
func (s *postgres) SelectFromDummyTable() string {
|
|
return ""
|
|
}
|
|
|
|
func (s *postgres) Quote(key string) string {
|
|
return fmt.Sprintf("\"%s\"", key)
|
|
}
|
|
|
|
func (s *postgres) HasTable(scope *Scope, tableName string) bool {
|
|
var count int
|
|
newScope := scope.New(nil)
|
|
newScope.Raw(fmt.Sprintf("SELECT count(*) FROM INFORMATION_SCHEMA.tables where table_name = %v and table_type = 'BASE TABLE'", newScope.AddToVars(tableName)))
|
|
newScope.SqlDB().QueryRow(newScope.Sql, newScope.SqlVars...).Scan(&count)
|
|
return count > 0
|
|
}
|
|
|
|
func (s *postgres) HasColumn(scope *Scope, tableName string, columnName string) bool {
|
|
var count int
|
|
newScope := scope.New(nil)
|
|
newScope.Raw(fmt.Sprintf("SELECT count(*) FROM information_schema.columns WHERE table_name = %v AND column_name = %v",
|
|
newScope.AddToVars(tableName),
|
|
newScope.AddToVars(columnName),
|
|
))
|
|
newScope.SqlDB().QueryRow(newScope.Sql, newScope.SqlVars...).Scan(&count)
|
|
return count > 0
|
|
}
|
|
|
|
func (s *postgres) RemoveIndex(scope *Scope, indexName string) {
|
|
scope.Raw(fmt.Sprintf("DROP INDEX %v", s.Quote(indexName))).Exec()
|
|
}
|
|
|
|
var hstoreType = reflect.TypeOf(Hstore{})
|
|
|
|
type Hstore map[string]*string
|
|
|
|
func (h Hstore) Value() (driver.Value, error) {
|
|
hstore := hstore.Hstore{Map: map[string]sql.NullString{}}
|
|
if len(h) == 0 {
|
|
return nil, nil
|
|
}
|
|
|
|
for key, value := range h {
|
|
hstore.Map[key] = sql.NullString{String: *value, Valid: true}
|
|
}
|
|
return hstore.Value()
|
|
}
|
|
|
|
func (h *Hstore) Scan(value interface{}) error {
|
|
hstore := hstore.Hstore{}
|
|
|
|
if err := hstore.Scan(value); err != nil {
|
|
return err
|
|
}
|
|
|
|
if len(hstore.Map) == 0 {
|
|
return nil
|
|
}
|
|
|
|
*h = Hstore{}
|
|
for k := range hstore.Map {
|
|
if hstore.Map[k].Valid {
|
|
s := hstore.Map[k].String
|
|
(*h)[k] = &s
|
|
} else {
|
|
(*h)[k] = nil
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|