CreateQuery mytable (children 3)
 Identifier mytable
 Columns definition (children 1)
  ExpressionList (children 4)
   ColumnDeclaration timestamp (children 1)
    DataType UInt64
   ColumnDeclaration insert_timestamp (children 1)
    DataType UInt64
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration value (children 1)
    DataType Float64
 Storage definition (children 3)
  Function ReplacingMergeTree (children 1)
   ExpressionList (children 1)
    Identifier insert_timestamp
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier key
    Identifier timestamp
  Function tuple (children 1)
   ExpressionList (children 2)
    Identifier key
    Identifier timestamp
