Generic cache read fix

plugins/org.jkiss.dbeaver.generic/src/org/jkiss/dbeaver/ext/generic/model/IndexCache.java

@@ -118,7 +118,7 @@ class IndexCache extends JDBCCompositeCache<GenericStructContainer, GenericTable
         String columnName = GenericUtils.safeGetStringTrimmed(indexObject, dbResult, JDBCConstants.COLUMN_NAME);
         String ascOrDesc = GenericUtils.safeGetStringTrimmed(indexObject, dbResult, JDBCConstants.ASC_OR_DESC);
 
-        GenericTableColumn tableColumn = parent.getAttribute(session.getProgressMonitor(), columnName);
+        GenericTableColumn tableColumn = CommonUtils.isEmpty(columnName) ? null : parent.getAttribute(session.getProgressMonitor(), columnName);
         if (tableColumn == null) {
             log.debug("Column '" + columnName + "' not found in table '" + parent.getName() + "' for index '" + object.getName() + "'");
             return null;

plugins/org.jkiss.dbeaver.generic/src/org/jkiss/dbeaver/ext/generic/model/PrimaryKeysCache.java

@@ -96,7 +96,7 @@ class PrimaryKeysCache extends JDBCCompositeCache<GenericStructContainer, Generi
     {
         String columnName = GenericUtils.safeGetStringTrimmed(pkObject, dbResult, JDBCConstants.COLUMN_NAME);
         if (CommonUtils.isEmpty(columnName)) {
-            log.warn("Null primary key column for '" + object.getName() + "'");
+            log.debug("Null primary key column for '" + object.getName() + "'");
             return null;
         }
         if (columnName.startsWith("[") && columnName.endsWith("]")) {