@Override
 public void visit(DeclareStatement obj) {
   preVisitVisitor(obj);
   visitNode(obj.getVariable());
   visitNode(obj.getExpression());
   postVisitVisitor(obj);
 }
 private void collectDeclareVariable(
     DeclareStatement obj,
     GroupSymbol variables,
     TempMetadataAdapter metadata,
     GroupContext externalGroups)
     throws QueryResolverException, TeiidComponentException {
   ElementSymbol variable = obj.getVariable();
   String typeName = obj.getVariableType();
   GroupSymbol gs = variable.getGroupSymbol();
   if (gs == null) {
     String outputName = variable.getShortName();
     variable.setGroupSymbol(new GroupSymbol(ProcedureReservedWords.VARIABLES));
     variable.setOutputName(outputName);
   } else {
     if (gs.getSchema() != null
         || !gs.getShortName().equalsIgnoreCase(ProcedureReservedWords.VARIABLES)) {
       handleUnresolvableDeclaration(
           variable,
           QueryPlugin.Util.getString(
               "ERR.015.010.0031",
               new Object[] {ProcedureReservedWords.VARIABLES, variable})); // $NON-NLS-1$
     }
   }
   boolean exists = false;
   try {
     ResolverVisitor.resolveLanguageObject(variable, null, externalGroups, metadata);
     exists = true;
   } catch (QueryResolverException e) {
     // ignore, not already defined
   }
   if (exists) {
     handleUnresolvableDeclaration(
         variable,
         QueryPlugin.Util.getString("ERR.015.010.0032", variable.getOutputName())); // $NON-NLS-1$
   }
   variable.setType(DataTypeManager.getDataTypeClass(typeName));
   variable.setGroupSymbol(variables);
   TempMetadataID id =
       new TempMetadataID(
           variable.getName(),
           typeName.equalsIgnoreCase(SQLConstants.NonReserved.EXCEPTION)
               ? Exception.class
               : variable.getType());
   id.setUpdatable(true);
   variable.setMetadataID(id);
   // TODO: this will cause the variables group to loose it's cache of resolved symbols
   metadata
       .getMetadataStore()
       .addElementToTempGroup(ProcedureReservedWords.VARIABLES, variable.clone());
 }