[GUI] Save as vector layer dialog: add hints about using TARGET_ARCGI…

…S_VERSION=ARCGIS_PRO_3_2_OR_LATER when needed

Fixes #58690

src/gui/ogr/qgsvectorlayersaveasdialog.cpp

@@ -308,6 +308,57 @@ QList<QPair<QLabel *, QWidget *> > QgsVectorLayerSaveAsDialog::createControls( c
 
 void QgsVectorLayerSaveAsDialog::accept()
 {
+#if GDAL_VERSION_NUM >= GDAL_COMPUTE_VERSION(3,9,0)
+  if ( format() == QLatin1String( "OpenFileGDB" ) )
+  {
+    // The OpenFileGDB driver supports 64-bit integer fields starting with GDAL 3.9,
+    // if selecting the TARGET_ARCGIS_VERSION=ARCGIS_PRO_3_2_OR_LATER option
+    bool targetAll = true;
+    for ( const QString &layerOption : layerOptions() )
+    {
+      if ( layerOption == QLatin1String( "TARGET_ARCGIS_VERSION=ARCGIS_PRO_3_2_OR_LATER" ) )
+      {
+        targetAll = false;
+      }
+    }
+    if ( targetAll )
+    {
+      for ( int i = 0; i < mLayer->fields().size(); ++i )
+      {
+        QgsField fld = mLayer->fields().at( i );
+        if ( fld.type() == QMetaType::Type::LongLong )
+        {
+          if ( QMessageBox::question( this,
+                                      tr( "Save Vector Layer As" ),
+                                      tr( "The layer contains at least one 64-bit integer field, which, with the current settings, can only be exported as a Real field. It could be exported as a 64-bit integer field if the TARGET_ARCGIS_VERSION layer option is set to ARCGIS_PRO_3_2_OR_LATER. Do you want to continue and export it as a Real field?" ) ) != QMessageBox::Yes )
+          {
+            return;
+          }
+          break;
+        }
+      }
+    }
+  }
+  else if ( format() == QLatin1String( "FileGDB" ) )
+  {
+    // The FileGDB driver based on the ESRI SDK doesn't support 64-bit integers
+    for ( int i = 0; i < mLayer->fields().size(); ++i )
+    {
+      QgsField fld = mLayer->fields().at( i );
+      if ( fld.type() == QMetaType::Type::LongLong )
+      {
+        if ( QMessageBox::question( this,
+                                    tr( "Save Vector Layer As" ),
+                                    tr( "The layer contains at least one 64-bit integer field, which cannot be exported as such when using this output driver. 64-bit integer fields could be supported by selecting the %1 format and setting its TARGET_ARCGIS_VERSION layer option to ARCGIS_PRO_3_2_OR_LATER. Do you want to continue and export it as a Real field?" ).arg( tr( "ESRI File Geodatabase" ) ) ) != QMessageBox::Yes )
+        {
+          return;
+        }
+        break;
+      }
+    }
+  }
+#endif
+
   if ( QFile::exists( fileName() ) )
   {
     QgsVectorFileWriter::EditionCapabilities caps =