CreateQuery rows_events_test (children 3)
 Identifier rows_events_test
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration k (children 1)
    DataType UInt32
   ColumnDeclaration v (children 1)
    DataType UInt32
 Storage definition (children 2)
  Function MergeTree
  Identifier k