SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function concat (children 1)
     ExpressionList (children 2)
      Literal \'ScalarSubqueriesGlobalCacheHit \'
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier ProfileEvents
        Literal \'ScalarSubqueriesGlobalCacheHit\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.query_log
   Function and (children 1)
    ExpressionList (children 4)
     Function notEquals (children 1)
      ExpressionList (children 2)
       Identifier type
       Literal \'QueryStart\'
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier current_database
       Function currentDatabase (children 1)
        ExpressionList
     Function like (children 1)
      ExpressionList (children 2)
       Identifier query
       Literal \'select%\'
     Function equals (children 1)
      ExpressionList (children 2)
       Function arrayElement (children 1)
        ExpressionList (children 2)
         Identifier Settings
         Literal \'execute_exists_as_scalar_subquery\'
       Literal \'1\'
