CreateQuery tab_00612 (children 3)
 Identifier tab_00612
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration key (children 1)
    DataType UInt64
   ColumnDeclaration n (children 1)
    DataType Nested (children 1)
     ExpressionList (children 1)
      NameTypePair x (children 1)
       DataType UInt64
 Storage definition (children 2)
  Function MergeTree
  Identifier key