Explain EXPLAIN QUERY TREE (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier bug
    Function and (children 1)
     ExpressionList (children 2)
      Function or (children 1)
       ExpressionList (children 3)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier k
          Literal UInt64_1
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier k
          Literal UInt64_2
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier k
          Literal UInt64_3
      Function or (children 1)
       ExpressionList (children 3)
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier s
          Literal UInt64_21
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier s
          Literal UInt64_22
        Function equals (children 1)
         ExpressionList (children 2)
          Identifier s
          Literal UInt64_23
    Set
