CreateQuery test_materialize (children 3)
 Identifier test_materialize
 Columns definition (children 1)
  ExpressionList (children 3)
   ColumnDeclaration part (children 1)
    DataType Int
   ColumnDeclaration key (children 1)
    DataType Int
   ColumnDeclaration value (children 1)
    DataType String
 Storage definition (children 4)
  Function MergeTree (children 1)
   ExpressionList
  Identifier part
  Identifier key
  Set
