5 files changed, 19 insertions, 19 deletions
diff --git a/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx b/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx
index 006266c78e5d..6d491ed34ee9 100644
--- a/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx
+++ b/connectivity/source/inc/FDatabaseMetaDataResultSet.hxx
@@ -245,31 +245,31 @@ namespace connectivity
         // some methods to get already defined ORowSetValues
         // this increase the reuse of ORowSetValues
         /// return an empty ORowSetValueDecorator
-        static ORowSetValueDecoratorRef getEmptyValue();
+        static ORowSetValueDecoratorRef const & getEmptyValue();
         /// return an ORowSetValueDecorator with 0 as value
-        static ORowSetValueDecoratorRef get0Value();
+        static ORowSetValueDecoratorRef const & get0Value();
         /// return an ORowSetValueDecorator with 1 as value
-        static ORowSetValueDecoratorRef get1Value();
+        static ORowSetValueDecoratorRef const & get1Value();
         /// return an ORowSetValueDecorator with ColumnSearch::BASIC as value
-        static ORowSetValueDecoratorRef getBasicValue();
+        static ORowSetValueDecoratorRef const & getBasicValue();
         /// return an ORowSetValueDecorator with string SELECT as value
-        static ORowSetValueDecoratorRef getSelectValue();
+        static ORowSetValueDecoratorRef const & getSelectValue();
         /// return an ORowSetValueDecorator with string INSERT as value
-        static ORowSetValueDecoratorRef getInsertValue();
+        static ORowSetValueDecoratorRef const & getInsertValue();
         /// return an ORowSetValueDecorator with string DELETE as value
-        static ORowSetValueDecoratorRef getDeleteValue();
+        static ORowSetValueDecoratorRef const & getDeleteValue();
         /// return an ORowSetValueDecorator with string UPDATE as value
-        static ORowSetValueDecoratorRef getUpdateValue();
+        static ORowSetValueDecoratorRef const & getUpdateValue();
         /// return an ORowSetValueDecorator with string CREATE as value
-        static ORowSetValueDecoratorRef getCreateValue();
+        static ORowSetValueDecoratorRef const & getCreateValue();
         /// return an ORowSetValueDecorator with string READ as value
-        static ORowSetValueDecoratorRef getReadValue();
+        static ORowSetValueDecoratorRef const & getReadValue();
         /// return an ORowSetValueDecorator with string ALTER as value
-        static ORowSetValueDecoratorRef getAlterValue();
+        static ORowSetValueDecoratorRef const & getAlterValue();
         /// return an ORowSetValueDecorator with string DROP as value
-        static ORowSetValueDecoratorRef getDropValue();
+        static ORowSetValueDecoratorRef const & getDropValue();
         /// return an ORowSetValueDecorator with string ' as value
-        static ORowSetValueDecoratorRef getQuoteValue();
+        static ORowSetValueDecoratorRef const & getQuoteValue();
 
     };
 }
diff --git a/connectivity/source/inc/calc/CConnection.hxx b/connectivity/source/inc/calc/CConnection.hxx
index b8b734a13114..63b1d4ab084d 100644
--- a/connectivity/source/inc/calc/CConnection.hxx
+++ b/connectivity/source/inc/calc/CConnection.hxx
@@ -70,7 +70,7 @@ namespace connectivity
             virtual css::uno::Reference< css::sdbc::XPreparedStatement > SAL_CALL prepareCall( const OUString& sql ) throw(css::sdbc::SQLException, css::uno::RuntimeException, std::exception) override;
 
             // no interface methods
-            css::uno::Reference< css::sheet::XSpreadsheetDocument> acquireDoc();
+            css::uno::Reference< css::sheet::XSpreadsheetDocument> const & acquireDoc();
             void releaseDoc();
 
             class ODocHolder
diff --git a/connectivity/source/inc/dbase/DIndex.hxx b/connectivity/source/inc/dbase/DIndex.hxx
index 5396e6475d48..afe45a478708 100644
--- a/connectivity/source/inc/dbase/DIndex.hxx
+++ b/connectivity/source/inc/dbase/DIndex.hxx
@@ -125,7 +125,7 @@ namespace connectivity
 
             ONDXPage* CreatePage(sal_uInt32 nPagePos, ONDXPage* pParent = nullptr, bool bLoad = false);
             void Collect(ONDXPage*);
-            ONDXPagePtr getRoot();
+            ONDXPagePtr const & getRoot();
 
             bool isUnique() const { return m_IsUnique; }
             bool UseCollector() const {return m_bUseCollector;}
diff --git a/connectivity/source/inc/hsqldb/HDriver.hxx b/connectivity/source/inc/hsqldb/HDriver.hxx
index 21bc04459b93..255c6609b5d3 100644
--- a/connectivity/source/inc/hsqldb/HDriver.hxx
+++ b/connectivity/source/inc/hsqldb/HDriver.hxx
@@ -72,7 +72,7 @@ namespace connectivity
                 @return
                     The driver which was currently selected.
             */
-            css::uno::Reference< css::sdbc::XDriver > loadDriver( );
+            css::uno::Reference< css::sdbc::XDriver > const & loadDriver( );
 
             /** shut down the connection and revoke the storage from the map
                 @param  _aIter
diff --git a/connectivity/source/inc/hsqldb/HStorageMap.hxx b/connectivity/source/inc/hsqldb/HStorageMap.hxx
index f0bbe98e24d2..62ae7ec3d233 100644
--- a/connectivity/source/inc/hsqldb/HStorageMap.hxx
+++ b/connectivity/source/inc/hsqldb/HStorageMap.hxx
@@ -48,9 +48,9 @@ namespace connectivity
             StreamHelper(const css::uno::Reference< css::io::XStream>& _xStream);
             ~StreamHelper();
 
-            css::uno::Reference< css::io::XInputStream>   getInputStream();
-            css::uno::Reference< css::io::XOutputStream>  getOutputStream();
-            css::uno::Reference< css::io::XSeekable>      getSeek();
+            css::uno::Reference< css::io::XInputStream> const &   getInputStream();
+            css::uno::Reference< css::io::XOutputStream> const &  getOutputStream();
+            css::uno::Reference< css::io::XSeekable> const &      getSeek();
         };