feat: migrator support table comment (#114)

* feat: migrator support table comment

* feat: migrator support TableType. It like ColumnTypes.

* remove CatalogValue & EngineValue.

* upgrade gorm version.

go.mod

@@ -4,7 +4,7 @@ go 1.14
 
 require (
 	github.com/go-sql-driver/mysql v1.7.0
-	gorm.io/gorm v1.24.7-0.20230306060331-85eaf9eeda11
+	gorm.io/gorm v1.25.1-0.20230505075827-e61b98d69677
 )
 
 require github.com/jinzhu/now v1.1.5 // indirect

go.sum

@@ -9,3 +9,5 @@ gorm.io/gorm v1.23.8 h1:h8sGJ+biDgBA1AD1Ha9gFCx7h8npU7AsLdlkX0n2TpE=
 gorm.io/gorm v1.23.8/go.mod h1:l2lP/RyAtc1ynaTjFksBde/O8v9oOGIApu2/xRitmZk=
 gorm.io/gorm v1.24.7-0.20230306060331-85eaf9eeda11 h1:9qNbmu21nNThCNnF5i2R3kw2aL27U8ZwbzccNjOmW0g=
 gorm.io/gorm v1.24.7-0.20230306060331-85eaf9eeda11/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=
+gorm.io/gorm v1.25.1-0.20230505075827-e61b98d69677 h1:+vFpygNj+UclZztgzy/5ZGvkag6EH6moMm/MNTxkShk=
+gorm.io/gorm v1.25.1-0.20230505075827-e61b98d69677/go.mod h1:L4uxeKpfBml98NYqVqwAdmV1a2nBtAec/cf3fpucW/k=

migrator.go

@@ -367,3 +367,28 @@ func (m Migrator) CurrentSchema(stmt *gorm.Statement, table string) (string, str
 func (m Migrator) GetTypeAliases(databaseTypeName string) []string {
 	return typeAliasMap[databaseTypeName]
 }
+
+// TableType table type return tableType,error
+func (m Migrator) TableType(value interface{}) (tableType gorm.TableType, err error) {
+	var table migrator.TableType
+
+	err = m.RunWithValue(value, func(stmt *gorm.Statement) error {
+		var (
+			values = []interface{}{
+				&table.SchemaValue, &table.NameValue, &table.TypeValue, &table.CommentValue,
+			}
+			currentDatabase, tableName = m.CurrentSchema(stmt, stmt.Table)
+			tableTypeSQL               = "SELECT table_schema, table_name, table_type, table_comment FROM information_schema.tables WHERE table_schema = ? AND table_name = ?"
+		)
+
+		row := m.DB.Table(tableName).Raw(tableTypeSQL, currentDatabase, tableName).Row()
+
+		if scanErr := row.Scan(values...); scanErr != nil {
+			return scanErr
+		}
+
+		return nil
+	})
+
+	return table, err
+}