CreateQuery t_block_number_delete (children 3)
 Identifier t_block_number_delete
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration x (children 1)
    DataType UInt32
   ColumnDeclaration ts (children 1)
    DataType DateTime
 Storage definition (children 3)
  Function MergeTree
  Identifier x
  Set
