SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier test
   Function and (children 1)
    ExpressionList (children 2)
     Function empty (children 1)
      ExpressionList (children 1)
       Identifier json.^`a`
     Function equals (children 1)
      ExpressionList (children 2)
       Identifier json.a.b.c
       Literal UInt64_0
