CreateQuery pk (children 3)
 Identifier pk
 Columns definition (children 1)
  ExpressionList (children 1)
   ColumnDeclaration x (children 1)
    DataType DateTime
 Storage definition (children 3)
  Function MergeTree
  Function toStartOfMinute (children 1)
   ExpressionList (children 1)
    Identifier x
  Set
