CreateQuery multi_int (children 3)
 Identifier multi_int
 Columns definition (children 1)
  ExpressionList (children 2)
   ColumnDeclaration k (children 1)
    DataType Int64
   ColumnDeclaration c (children 1)
    DataType Nullable (children 1)
     ExpressionList (children 1)
      DataType Int64
 Storage definition (children 3)
  Function MergeTree
  Identifier k
  Identifier k
