CreateQuery override_test (children 4)
 Identifier override_test
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration _part (children 1)
    DataType UInt32
 Storage definition (children 2)
  Function MergeTree
  Function tuple (children 1)
   ExpressionList
 SelectWithUnionQuery (children 1)
  ExpressionList (children 1)
   SelectQuery (children 1)
    ExpressionList (children 1)
     Literal UInt64_1
