user-defined-types

问题 Suppose the following example. There are classes A-C derived from std::exception: #include <exception> #include <string> #include <iostream> class A : public std::exception { std::string a_text; public: A(const std::string & a_text_) : a_text(a_text_) {} virtual ~A() throw() { } }; class B : public A { const std::string b_text; public: B(const std::string &a_text_, const std::string & b_text_) : A(a_text_), b_text(b_text_) {} virtual ~B() throw() {} }; template <typename T> class C : public B

问题 Suppose the following example. There are classes A-C derived from std::exception: #include <exception> #include <string> #include <iostream> class A : public std::exception { std::string a_text; public: A(const std::string & a_text_) : a_text(a_text_) {} virtual ~A() throw() { } }; class B : public A { const std::string b_text; public: B(const std::string &a_text_, const std::string & b_text_) : A(a_text_), b_text(b_text_) {} virtual ~B() throw() {} }; template <typename T> class C : public B

问题 Language: VBA - MS Access I am using User-Defined-Types (UDT) within my code. I would like to be able determine which section of the UDT i'm loading data into based on a state variable. My first attempt was to use "With" statements nested into an "IF" statement. This doesn't work (I get a compiler error that says Else without if). Is there a way to make this work? or another way of going about using a state variable to determine which section of the UDT i'm loading? Type MyOtherType Name as

问题 There is any way, in a user-defined type, to define a private attribute ? In my scenario, I need to define some attribute like utl_tcp.connection. I need something like this : CREATE TYPE TYPE_TCP AS OBJECT ( CONNECTION UTL_TCP.CONNECTION, IS_CONNECTED BOOLEAN ); It has been used previously inside a package , but now I should delete the package and use it as an object type. TYPE TYPE_TCP IS RECORD ( CONNECTION UTL_TCP.CONNECTION, IS_CONNECTED BOOLEAN ); All ideas/suggestions are Welcome Thank

问题 When I try to compile the procedure with collection type as in parameter, I'm getting the error like wrong number or types of arguments in call to 'P_AA' -------Procedure created with in parameter as nested table------------ create or replace procedure p_aa(serv in t45) is aa serv_item%rowtype; begin for i in 1..serv.count loop select a.* into aa from serv_item a where a.serv_item_id = serv(i); dbms_output.put_line('Serv item '||aa.serv_item_id||' '||'status '||aa.status); end loop; end; / --

问题 Is there any way to update part of a user-defined type in Oracle? Example: create or replace TYPE MY_TYPE AS OBJECT ( VAR_1 NUMBER, VAR_2 DATE, VAR_3 NUMBER, VAR_4 DATE ); Sample Table: create TABLE TEST_TABLE ( TBL_ID NUMBER, MY_DATA MY_TYPE ); Is there any way to do something like the following: UPDATE TEST_TABLE SET MY_DATA.VAR_3 = 1; Thanks! 回答1: Yes but for some reason you need to alias the table: UPDATE TEST_TABLE T SET T.MY_DATA.VAR_3 = 1; 来源： https://stackoverflow.com/questions

问题 In Spark 2.0, the one example I've found of creating a UDT in Scala seems to no longer be applicable. The UserDefinedType class has been set as private , with the comment: Note: This was previously a developer API in Spark 1.x. We are making this private in Spark 2.0 because we will very likely create a new version of this that works better with Datasets. It might be the intent of UDTRegistration to be the new mechanism of declaring UDT, but it's also private . So far, my research tells me

问题 I want to define a new data type consisting of an array with a size inputted by the user. For example if the user inputs 128, then my program should make a new type which is basically an array of 16 bytes. This structure's definition needs to be global since I am going to use that type thereafter in my program. It is necessary to have a dynamic size for this structure because I will have a HUGE database populated by that type of variables in the end. The code I have right now is: struct user

问题 I have a table like this: CREATE TABLE T_C_EVO_GAME_CONFIG_CHANGE_LOG( F_TABLE_MODIFIED VARCHAR2(40), F_OPERATION_PERFORMED VARCHAR2(30), F_ROWS_ALTERED INTEGER, F_LAST_UPDATED_BY VARCHAR2(200), F_LAST_UPDATED_DATE TIMESTAMP); I am trying to build a type with the same structure: create or replace type TYPE_EVOL_CONFIG_CHANGE_LOG as object ( F_TABLE_MODIFIED T_C_EVO_GAME_CONFIG_CHANGE_LOG.TABLE_MODIFIED%TYPE , F_OPERATION_PERFORMED T_C_EVO_GAME_CONFIG_CHANGE_LOG.OPERATION_PERFORMED%TYPE, F

问题 I got this error, "Custom type mapping for 'ClassXX' is not specified or is invalid. Is it possible that my member value type is not correct to match db UDTs? Here is my Code: ClassXX [OracleCustomTypeMapping("DB.T_OUTERTRAN")] public class ClassXX: AOracleCustomObject<ClassXX> { [OracleObjectMapping("OUTERSYSTEMCODE")] public int OuterSystemCode { get; set; } [OracleObjectMapping("TRANSACTIONSOURCE")] public int TransactionSource { get; set; } [OracleObjectMapping("TRANSACTIONTYPE")] public