CreateQuery merge_tree_deduplication (children 3)
 Identifier merge_tree_deduplication
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration value (children 1)
    DataType String
   ColumnDeclaration part (children 2)
    DataType UInt8
    Literal UInt64_77
 Storage definition (children 4)
  Function MergeTree (children 1)
   ExpressionList
  Identifier part
  Identifier key
  Set