feat: migrator support tableType.It like ColumnTypes

migrator.go

@@ -1,10 +1,9 @@
 package gorm
 
 import (
-	"reflect"
-
 	"gorm.io/gorm/clause"
 	"gorm.io/gorm/schema"
+	"reflect"
 )
 
 // Migrator returns migrator
@@ -60,6 +59,16 @@ type Index interface {
 	Option() string
 }
 
+// TableType table type interface
+type TableType interface {
+	Catalog() string
+	Schema() string
+	Name() string
+	Type() string
+	Engine() (engine string, ok bool)
+	Comment() (comment string, ok bool)
+}
+
 // Migrator migrator interface
 type Migrator interface {
 	// AutoMigrate
@@ -76,7 +85,7 @@ type Migrator interface {
 	HasTable(dst interface{}) bool
 	RenameTable(oldName, newName interface{}) error
 	GetTables() (tableList []string, err error)
-	GetTableComment(tableName string) (comment string, err error)
+	TableType(dst interface{}) (TableType, error)
 
 	// Columns
 	AddColumn(dst interface{}, field string) error

migrator/migrator.go

@@ -948,7 +948,7 @@ func (m Migrator) GetTypeAliases(databaseTypeName string) []string {
 	return nil
 }
 
-// GetTableComment return table comment
-func (m Migrator) GetTableComment(tableName string) (string, error) {
-	return "", errors.New("not support")
+// TableType return tableType gorm.TableType and execErr error
+func (m Migrator) TableType(dst interface{}) (gorm.TableType, error) {
+	return nil, errors.New("not support")
 }

migrator/table_type.go

@@ -0,0 +1,45 @@
+package migrator
+
+import (
+	"database/sql"
+)
+
+// TableType table type implements TableType interface
+type TableType struct {
+	CatalogValue string
+	SchemaValue  string
+	NameValue    string
+	TypeValue    string
+	EngineValue  sql.NullString
+	CommentValue sql.NullString
+}
+
+// Catalog returns the catalog of the table.
+func (ct TableType) Catalog() string {
+	return ct.CatalogValue
+}
+
+// Schema returns the schema of the table.
+func (ct TableType) Schema() string {
+	return ct.SchemaValue
+}
+
+// Name returns the name of the table.
+func (ct TableType) Name() string {
+	return ct.NameValue
+}
+
+// Type returns the type of the table.
+func (ct TableType) Type() string {
+	return ct.TypeValue
+}
+
+// Engine returns the engine of current table.
+func (ct TableType) Engine() (engine string, ok bool) {
+	return ct.EngineValue.String, ct.EngineValue.Valid
+}
+
+// Comment returns the comment of current table.
+func (ct TableType) Comment() (comment string, ok bool) {
+	return ct.CommentValue.String, ct.CommentValue.Valid
+}