Explain EXPLAIN SYNTAX (children 1)
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 2)
    ExpressionList (children 4)
     Identifier i
     Identifier j
     ColumnsListMatcher (children 2)
      ExpressionList (children 3)
       Identifier i
       Identifier j
       Identifier k
      ColumnsTransformerList (children 1)
       ColumnsApplyTransformer
     ColumnsListMatcher (children 2)
      ExpressionList (children 2)
       Identifier i
       Identifier j
      ColumnsTransformerList (children 1)
       ColumnsExceptTransformer (children 1)
        Identifier i
    TablesInSelectQuery (children 1)
     TablesInSelectQueryElement (children 1)
      TableExpression (children 1)
       TableIdentifier columns_transformers
