CreateQuery d5 (children 3)
 Identifier d5
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration key (children 1)
    DataType Int
   ColumnDeclaration value (children 1)
    DataType Int
 Storage definition (children 2)
  Function MergeTree (children 1)
   ExpressionList
  Identifier key
