message: fix(Parser): fix bug of DISTINCT
diff: @@ -276,11 +276,11 @@ antlrcpp::Any QueryParser::visitSelectClause(SPARQLParser::SelectClauseContext *
  {
  string tmp = ctx->children[1]->getText();
  transform(tmp.begin(), tmp.end(), tmp.begin(), ::toupper);
  - if (ctx->children[1]->getText() == "DISTINCT")
  + if (tmp == "DISTINCT")
  query_tree_ptr->setProjectionModifier(QueryTree::Modifier_Distinct);
  - else if (ctx->children[1]->getText() == "REDUCED")
  + else if (tmp == "REDUCED")
  throw runtime_error("[ERROR] REDUCED is currently not supported.");
  - else if (ctx->children[1]->getText() == "*")
  + else if (tmp == "*")
  query_tree_ptr->setProjectionAsterisk();
  }
  