fix: editing table data on mysql versions without generated column support

Refs #462

Author: ansgarbecker

extra/locale/heidisql.po

@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: HeidiSQL\n"
 "POT-Creation-Date: 2012-11-05 21:40\n"
-"PO-Revision-Date: 2026-03-18 19:40+0100\n"
+"PO-Revision-Date: 2026-03-20 10:10+0100\n"
 "Last-Translator: Ansgar Becker <anse@heidisql.com>\n"
 "Language-Team: English (http://www.transifex.com/projects/p/heidisql/language/en/)\n"
 "Language: en\n"
@@ -4931,8 +4931,8 @@ msgstr "Could not find node to focus."
 msgid "Could not load full row data."
 msgstr "Could not load full row data."
 
-msgid "Column %s is defined as generated. You cannot edit its content."
-msgstr "Column %s is defined as generated. You cannot edit its content."
+msgid "Column %s is defined as generated per \"%s\". You cannot edit its content."
+msgstr "Column %s is defined as generated per \"%s\". You cannot edit its content."
 
 #: main.pas:8462
 msgid "Not available on %s"

source/const.inc

@@ -99,7 +99,8 @@ const
   MsgUnhandledNetType: String = 'Unhandled connection type (%d)';
   MsgUnhandledControl: String = 'Unhandled control in %s';
   MsgDisconnect: String = 'Connection to %s closed at %s';
-  TextInvalidColumn: String = '?';
+  // This must be an empty string, otherwise TTableColumn's get GenerationExpression=XYZ on old servers
+  TextInvalidColumn: String = '';
   FILEFILTER_SQLITEDB = '*.sqlite3;*.sqlite;*.db;*.s3db';
   FILEEXT_SQLITEDB = 'sqlite3';
   PROPOSAL_ITEM_HEIGHT = 18;

source/main.pas

@@ -10773,7 +10773,7 @@ procedure TMainForm.AnyGridEditing(Sender: TBaseVirtualTree; Node:
         if Assigned(ColInfo) then begin
           Allowed := ColInfo.GenerationExpression.IsEmpty;
           if not Allowed then
-            ErrorDialog(f_('Column %s is defined as generated. You cannot edit its content.', [IntToStr(Column)]));
+            ErrorDialog(f_('Column %s is defined as generated per "%s". You cannot edit its content.', [IntToStr(Column), ColInfo.GenerationExpression]));
         end;
       end;