CreateQuery 02563_db dist_t_1 (children 4)
 Identifier 02563_db
 Identifier dist_t_1
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration timestamp (children 1)
    DataType DateTime64 (children 1)
     ExpressionList (children 1)
      Literal UInt64_9
   ColumnDeclaration a (children 1)
    DataType String
   ColumnDeclaration b (children 1)
    DataType String
 Storage definition (children 1)
  Function Distributed (children 1)
   ExpressionList (children 3)
    Literal \'test_shard_localhost\'
    Literal \'02563_db\'
    Literal \'t_1\'
