public static ShowResultSet execute(ShowStmt statement, ConnectContext context) {
        return GlobalStateMgr.getCurrentState().getShowExecutor().showExecutorVisitor.visit(statement, context);
    }
@Test
    public void testShowDbPriv() throws AnalysisException, DdlException {
        ShowDbStmt stmt = new ShowDbStmt(null);

        ctx.setGlobalStateMgr(AccessTestUtil.fetchBlockCatalog());
        ctx.setCurrentUserIdentity(UserIdentity.ROOT);
        ShowResultSet resultSet = ShowExecutor.execute(stmt, ctx);
    }