CreateQuery table_to_merge_c (children 3)
 Identifier table_to_merge_c
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration id (children 1)
    DataType UInt64
   ColumnDeclaration val (children 1)
    DataType String
 Storage definition (children 2)
  Function ReplacingMergeTree (children 1)
   ExpressionList
  Identifier id