refactor: 实现 DbType 类型，集中处理部分差异化的数据库操作

server/internal/db/api/db_test.go

@@ -9,46 +9,46 @@ import (
 func Test_escapeSql(t *testing.T) {
 	tests := []struct {
 		name   string
-		dbType string
+		dbType entity.DBType
 		sql    string
 		want   string
 	}{
 		{
-			dbType: entity.DbTypeMysql,
+			dbType: entity.DBTypeMysql{},
 			sql:    "\\a\\b",
 			want:   "'\\\\a\\\\b'",
 		},
 		{
-			dbType: entity.DbTypeMysql,
+			dbType: entity.DBTypeMysql{},
 			sql:    "'a'",
 			want:   "'''a'''",
 		},
 		{
 			name:   "不间断空格",
-			dbType: entity.DbTypeMysql,
+			dbType: entity.DBTypeMysql{},
 			sql:    "a\u00A0b",
 			want:   "'a\u00A0b'",
 		},
 		{
-			dbType: entity.DbTypePostgres,
+			dbType: entity.DBTypePostgres{},
 			sql:    "\\a\\b",
 			want:   " E'\\\\a\\\\b'",
 		},
 		{
-			dbType: entity.DbTypePostgres,
+			dbType: entity.DBTypePostgres{},
 			sql:    "'a'",
 			want:   "'''a'''",
 		},
 		{
 			name:   "不间断空格",
-			dbType: entity.DbTypePostgres,
+			dbType: entity.DBTypePostgres{},
 			sql:    "a\u00A0b",
 			want:   "'a\u00A0b'",
 		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got := escapeSql(tt.dbType, tt.sql)
+			got := tt.dbType.QuoteLiteral(tt.sql)
 			require.Equal(t, tt.want, got)
 		})
 	}