forked from mirror/gorm
104 lines
2.6 KiB
Go
104 lines
2.6 KiB
Go
package gorm
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import (
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"fmt"
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"reflect"
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"strings"
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"time"
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)
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type mssql struct{}
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func (s *mssql) BinVar(i int) string {
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return "$$" // ?
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}
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func (s *mssql) SupportLastInsertId() bool {
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return true
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}
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func (s *mssql) HasTop() bool {
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return true
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}
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func (s *mssql) SqlTag(value reflect.Value, size int, autoIncrease bool) string {
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switch value.Kind() {
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case reflect.Bool:
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return "bit"
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case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uintptr:
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if autoIncrease {
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return "int IDENTITY(1,1)"
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}
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return "int"
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case reflect.Int64, reflect.Uint64:
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if autoIncrease {
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return "bigint IDENTITY(1,1)"
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}
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return "bigint"
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case reflect.Float32, reflect.Float64:
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return "float"
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case reflect.String:
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if size > 0 && size < 65532 {
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return fmt.Sprintf("nvarchar(%d)", size)
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}
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return "text"
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case reflect.Struct:
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if _, ok := value.Interface().(time.Time); ok {
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return "datetime2"
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}
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default:
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if _, ok := value.Interface().([]byte); ok {
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if size > 0 && size < 65532 {
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return fmt.Sprintf("varchar(%d)", size)
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}
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return "text"
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}
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}
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panic(fmt.Sprintf("invalid sql type %s (%s) for mssql", value.Type().Name(), value.Kind().String()))
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}
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func (s *mssql) ReturningStr(tableName, key string) string {
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return ""
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}
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func (s *mssql) SelectFromDummyTable() string {
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return ""
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}
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func (s *mssql) Quote(key string) string {
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return fmt.Sprintf(" \"%s\"", key)
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}
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func (s *mssql) databaseName(scope *Scope) string {
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dbStr := strings.Split(scope.db.parent.source, ";")
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for _, value := range dbStr {
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s := strings.Split(value, "=")
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if s[0] == "database" {
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return s[1]
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}
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}
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return ""
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}
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func (s *mssql) HasTable(scope *Scope, tableName string) bool {
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var count int
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scope.NewDB().Raw("SELECT count(*) FROM INFORMATION_SCHEMA.tables WHERE table_name = ? AND table_catalog = ?", tableName, s.databaseName(scope)).Row().Scan(&count)
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return count > 0
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}
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func (s *mssql) HasColumn(scope *Scope, tableName string, columnName string) bool {
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var count int
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scope.NewDB().Raw("SELECT count(*) FROM information_schema.columns WHERE table_catalog = ? AND table_name = ? AND column_name = ?", s.databaseName(scope), tableName, columnName).Row().Scan(&count)
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return count > 0
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}
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func (s *mssql) HasIndex(scope *Scope, tableName string, indexName string) bool {
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var count int
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scope.NewDB().Raw("SELECT count(*) FROM sys.indexes WHERE name=? AND object_id=OBJECT_ID(?)", indexName, tableName).Row().Scan(&count)
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return count > 0
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}
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func (s *mssql) RemoveIndex(scope *Scope, indexName string) {
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scope.NewDB().Exec(fmt.Sprintf("DROP INDEX %v ON %v", indexName, scope.QuotedTableName()))
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}
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