refactor: 接口 ISqlDialect 改名 SqlDialect(仓颉惯例,去掉 I 前缀,删除兼容别名,同步 README 与文件名 sql_dialect.cj)

src/migrations/migrations.cj

@@ -275,12 +275,12 @@ public open class Migration {
 }
 
 /**
- * DDL SQL 工厂：MigrationOperation → SQL（类型映射与差异语法委托给 ISqlDialect）。
+ * DDL SQL 工厂：MigrationOperation → SQL（类型映射与差异语法委托给 SqlDialect）。
  */
 public class DdlFactory {
     public init() {}
 
-    public func toSql(op: MigrationOperation, dialect: ISqlDialect): String {
+    public func toSql(op: MigrationOperation, dialect: SqlDialect): String {
         match (op.kind) {
             case MigrationOperationKind.CreateTable => createTableSql(op, dialect)
             case MigrationOperationKind.DropTable => "DROP TABLE IF EXISTS ${dialect.quoteName(op.tableName)}"
@@ -303,7 +303,7 @@ public class DdlFactory {
     ///   - 有同名列且类型一致 → AddColumn 幂等跳过（空列表）；AlterColumn 保留原 SQL（处理非空/长度等变化）
     ///   - 有同名列但类型不同 → 先 DROP COLUMN 再 ADD COLUMN（重建该字段）
     /// existingType 来自 information_schema.data_type；None 表示列不存在。
-    public func resolveColumnSqls(op: MigrationOperation, dialect: ISqlDialect,
+    public func resolveColumnSqls(op: MigrationOperation, dialect: SqlDialect,
         existingType: ?String): ArrayList<String> {
         let result = ArrayList<String>()
         let col = op.column.getOrThrow()
@@ -369,7 +369,7 @@ public class DdlFactory {
         sb.toString()
     }
 
-    private func createTableSql(op: MigrationOperation, dialect: ISqlDialect): String {
+    private func createTableSql(op: MigrationOperation, dialect: SqlDialect): String {
         let sb = StringBuilder()
         sb.append("CREATE TABLE IF NOT EXISTS ${dialect.quoteName(op.tableName)} (\n")
         var first = true
@@ -384,7 +384,7 @@ public class DdlFactory {
         sb.toString()
     }
 
-    private func createIndexSql(op: MigrationOperation, dialect: ISqlDialect): String {
+    private func createIndexSql(op: MigrationOperation, dialect: SqlDialect): String {
         let sb = StringBuilder()
         sb.append("CREATE ")
         if (op.unique) {
@@ -406,7 +406,7 @@ public class DdlFactory {
         sb.toString()
     }
 
-    private func columnDefSql(col: ColumnDefinition, dialect: ISqlDialect): String {
+    private func columnDefSql(col: ColumnDefinition, dialect: SqlDialect): String {
         let sb = StringBuilder()
         sb.append(dialect.quoteName(col.name))
         sb.append(" ${dialect.columnTypeSql(col.columnType, col.autoIncrement, col.maxLength)}")

src/migrations/migrator.cj

@@ -18,10 +18,10 @@ import simcu::orm.sql.*
  */
 public class Migrator {
     private let _datasource: Datasource
-    private let _dialect: ISqlDialect
+    private let _dialect: SqlDialect
     private let _historyTable = "simcu_orm_migrations"
 
-    public init(datasource: Datasource, dialect: ISqlDialect) {
+    public init(datasource: Datasource, dialect: SqlDialect) {
         this._datasource = datasource
         this._dialect = dialect
     }