- 修复 Firebird Embedded 版本系统表 isidentity_type 兼容问题；

Providers/FreeSql.Provider.Firebird/FirebirdAdo/FirebirdAdo.cs

@@ -35,6 +35,29 @@ namespace FreeSql.Firebird
                 }
             }
         }
+
+        public bool IsFirebird2_5 => ServerVersion.Contains("Firebird 2.5");
+        public string ServerVersion
+        {
+            get
+            {
+                if (string.IsNullOrEmpty(_serverVersion) && MasterPool != null)
+                    using (var conn = MasterPool.Get())
+                    {
+                        try
+                        {
+                            _serverVersion = conn.Value.ServerVersion;
+                        }
+                        catch
+                        {
+                            _serverVersion = "3.0.0";
+                        }
+                    }
+                return _serverVersion;
+            }
+        }
+        string _serverVersion;
+
         public override object AddslashesProcessParam(object param, Type mapType, ColumnInfo mapColumn)
         {
             if (param == null) return "NULL";

Providers/FreeSql.Provider.Firebird/FirebirdCodeFirst.cs

@@ -160,7 +160,7 @@ namespace FreeSql.Firebird
                     tboldname = null; //如果新表已经存在，不走改表名逻辑
 
                 //对比字段，只可以修改类型、增加字段、有限的修改字段名；保证安全不删除字段
-                var sql = _commonUtils.FormatSql(@"
+                var sql = _commonUtils.FormatSql($@"
 select
 trim(a.rdb$field_name),
 case
@@ -176,12 +176,12 @@ case
     coalesce((select ' SUB_TYPE ' || rdb$type from rdb$types where b.rdb$field_type = 261 and rdb$type = b.rdb$field_sub_type and rdb$field_name = 'RDB$FIELD_SUB_TYPE' rows 1),'')
   end || trim(case when b.rdb$dimensions = 1 then '[]' else '' end),
 case when a.rdb$null_flag = 1 then 0 else 1 end,
-case when a.rdb$identity_type = 1 then 1 else 0 end,
+{((_orm.Ado as FirebirdAdo)?.IsFirebird2_5 == true ? "0" : "case when a.rdb$identity_type = 1 then 1 else 0 end")},
 a.rdb$description
 from rdb$relation_fields a
 inner join rdb$fields b on b.rdb$field_name = a.rdb$field_source
 inner join rdb$relations d on d.rdb$relation_name = a.rdb$relation_name
-where a.rdb$system_flag = 0 and trim(d.rdb$relation_name) = {0}
+where a.rdb$system_flag = 0 and trim(d.rdb$relation_name) = {{0}}
 order by a.rdb$relation_name, a.rdb$field_position", tboldname ?? tbname);
                 var ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
                 var tbstruct = ds.ToDictionary(a => string.Concat(a[0]), a =>

Providers/FreeSql.Provider.Firebird/FirebirdDbFirst.cs

@@ -196,7 +196,7 @@ where rdb$system_flag=0" + (tbname == null ? "" : $" and {(ignoreCase ? "upper(t
             }
             loc8.Append(")");
 
-            sql = string.Format(@"
+            sql = $@"
 select
 trim(d.rdb$relation_name),
 trim(a.rdb$field_name),
@@ -226,15 +226,15 @@ case
     coalesce((select ' SUB_TYPE ' || rdb$type from rdb$types where b.rdb$field_type = 261 and rdb$type = b.rdb$field_sub_type and rdb$field_name = 'RDB$FIELD_SUB_TYPE' rows 1),'')
   end || trim(case when b.rdb$dimensions = 1 then '[]' else '' end),
 case when a.rdb$null_flag = 1 then 0 else 1 end,
-case when a.rdb$identity_type = 1 then 1 else 0 end,
+{((_orm.Ado as FirebirdAdo)?.IsFirebird2_5 == true ? "0" : "case when a.rdb$identity_type = 1 then 1 else 0 end")},
 a.rdb$description,
 a.rdb$default_value
 from rdb$relation_fields a
 inner join rdb$fields b on b.rdb$field_name = a.rdb$field_source
 inner join rdb$relations d on d.rdb$relation_name = a.rdb$relation_name
-where a.rdb$system_flag = 0 and {0}
+where a.rdb$system_flag = 0 and {loc8}
 order by a.rdb$relation_name, a.rdb$field_position
-", loc8);
+";
             ds = _orm.Ado.ExecuteArray(CommandType.Text, sql);
             if (ds == null) return loc1;