CreateQuery index (children 3)
 Identifier index
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration key (children 1)
    DataType Int32
   ColumnDeclaration name (children 1)
    DataType String
   ColumnDeclaration merge_date (children 1)
    DataType Date
 Storage definition (children 1)
  Function MergeTree (children 1)
   ExpressionList (children 3)
    Identifier merge_date
    Identifier key
    Literal UInt64_8192