mirror of https://github.com/go-gorm/gorm.git
81 lines
2.1 KiB
Go
81 lines
2.1 KiB
Go
package gorm
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
"time"
|
|
)
|
|
|
|
type mssql struct {
|
|
commonDialect
|
|
}
|
|
|
|
func (mssql) HasTop() bool {
|
|
return true
|
|
}
|
|
|
|
func (mssql) SqlTag(value reflect.Value, size int, autoIncrease bool) string {
|
|
switch value.Kind() {
|
|
case reflect.Bool:
|
|
return "bit"
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
|
|
if autoIncrease {
|
|
return "int IDENTITY(1,1)"
|
|
}
|
|
return "int"
|
|
case reflect.Int64, reflect.Uint64:
|
|
if autoIncrease {
|
|
return "bigint IDENTITY(1,1)"
|
|
}
|
|
return "bigint"
|
|
case reflect.Float32, reflect.Float64:
|
|
return "float"
|
|
case reflect.String:
|
|
if size > 0 && size < 65532 {
|
|
return fmt.Sprintf("nvarchar(%d)", size)
|
|
}
|
|
return "text"
|
|
case reflect.Struct:
|
|
if _, ok := value.Interface().(time.Time); ok {
|
|
return "datetime2"
|
|
}
|
|
default:
|
|
if _, ok := value.Interface().([]byte); ok {
|
|
if size > 0 && size < 65532 {
|
|
return fmt.Sprintf("varchar(%d)", size)
|
|
}
|
|
return "text"
|
|
}
|
|
}
|
|
panic(fmt.Sprintf("invalid sql type %s (%s) for mssql", value.Type().Name(), value.Kind().String()))
|
|
}
|
|
|
|
func (s mssql) HasTable(scope *Scope, tableName string) bool {
|
|
var (
|
|
count int
|
|
databaseName = s.CurrentDatabase(scope)
|
|
)
|
|
s.RawScanInt(scope, &count, "SELECT count(*) FROM INFORMATION_SCHEMA.tables WHERE table_name = ? AND table_catalog = ?", tableName, databaseName)
|
|
return count > 0
|
|
}
|
|
|
|
func (s mssql) HasColumn(scope *Scope, tableName string, columnName string) bool {
|
|
var (
|
|
count int
|
|
databaseName = s.CurrentDatabase(scope)
|
|
)
|
|
s.RawScanInt(scope, &count, "SELECT count(*) FROM information_schema.columns WHERE table_catalog = ? AND table_name = ? AND column_name = ?", databaseName, tableName, columnName)
|
|
return count > 0
|
|
}
|
|
|
|
func (s mssql) HasIndex(scope *Scope, tableName string, indexName string) bool {
|
|
var count int
|
|
s.RawScanInt(scope, &count, "SELECT count(*) FROM sys.indexes WHERE name=? AND object_id=OBJECT_ID(?)", indexName, tableName)
|
|
return count > 0
|
|
}
|
|
|
|
func (s mssql) CurrentDatabase(scope *Scope) (name string) {
|
|
s.RawScanString(scope, &name, "SELECT DB_NAME() AS [Current Database]")
|
|
return
|
|
}
|