CreateQuery tv (children 3)
 Identifier tv
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType UInt32
   ColumnDeclaration t (children 1)
    DataType DateTime
   ColumnDeclaration tv (children 1)
    DataType Float64
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier key
    Identifier t