CreateQuery ORDERS_shard (children 3)
 Identifier ORDERS_shard
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration O_ORDERKEY (children 1)
    DataType UInt64
   ColumnDeclaration O_ORDERPRIORITY (children 1)
    DataType UInt32
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier O_ORDERKEY
