Explain EXPLAIN (children 2)
 Set
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 4)
    ExpressionList (children 1)
     Asterisk
    TablesInSelectQuery (children 2)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier test_table_1 (alias lhs)
     TablesInSelectQueryElement (children 2)
      TableExpression (children 1)
       TableIdentifier test_table_2 (alias rhs)
      TableJoin (children 1)
       Function equals (children 1)
        ExpressionList (children 2)
         Identifier lhs.id
         Identifier rhs.id
    Function and (children 1)
     ExpressionList (children 2)
      Function notEquals (children 1)
       ExpressionList (children 2)
        Identifier lhs.id
        Literal UInt64_0
      Function notEquals (children 1)
       ExpressionList (children 2)
        Identifier rhs.id
        Literal UInt64_0
    Set
