Store last multiline query

When loading, the last multiline query used will be available.

Also, refactored the part to execute multiline queries in a
separate function.

relational_gui/guihandler.py

@@ -94,10 +94,10 @@ class relForm(QtWidgets.QMainWindow):
         compatibility.set_utf8_text(self.ui.txtResult, itm[0])
         compatibility.set_utf8_text(self.ui.txtQuery, itm[1])
 
-    def execute(self):
-        '''Executes the query'''
-        if self.multiline:
+    def _run_multiline(self):
         query = compatibility.get_py_str(self.ui.txtMultiQuery.toPlainText())
+        self.settings.setValue('multiline/query', query)
+
         queries = query.split('\n')
 
         for query in queries:
@@ -116,15 +116,19 @@ class relForm(QtWidgets.QMainWindow):
                 expr = parser.parse(query)
                 result = eval(expr, self.relations)
                 self.relations[relname] = result
-                    self.updateRelations()  # update the list
-                    self.selectedRelation = result
-                    self.showRelation(self.selectedRelation)
             except Exception as e:
                 print(str(e))
                 QtWidgets.QMessageBox.information(None, QtWidgets.QApplication.translate("Form", "Error"), u"%s\n%s" %
                                               (QtWidgets.QApplication.translate("Form", "Check your query!"), str(e)))
-            return
+                break
+        self.updateRelations()  # update the list
+        self.selectedRelation = result
+        self.showRelation(self.selectedRelation)
 
+    def execute(self):
+        '''Executes the query'''
+        if self.multiline:
+            return self._run_multiline()
 
         #Single line query
         query = compatibility.get_py_str(self.ui.txtQuery.text())
@@ -277,6 +281,7 @@ class relForm(QtWidgets.QMainWindow):
     def restore_settings(self):
         # self.settings.value('session_name','default').toString()
         self.setMultiline(self.settings.value('multiline','false')=='true')
+        self.ui.txtMultiQuery.setPlainText(self.settings.value('multiline/query',''))
 
     def showSurvey(self):
         if self.Survey == None: