Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 3)
    ExpressionList (children 2)
     Identifier test
     Function materialize (alias s) (children 1)
      ExpressionList (children 1)
       Literal \'Привет, World\'
    Function or (children 1)
     ExpressionList (children 3)
      Function like (alias test) (children 1)
       ExpressionList (children 2)
        Identifier s
        Literal \'hell%\'
      Function ilike (children 1)
       ExpressionList (children 2)
        Identifier s
        Literal \'%привет%\'
      Function ilike (children 1)
       ExpressionList (children 2)
        Identifier s
        Literal \'world%\'
    Set
