DbConnection Class Reference
[Public API]
This class represents connection to database.
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#include <database.h>
Inheritance diagram for DbConnection:
Public Types | |
| enum | unicode_flag_t { DEBEA_UNICODE_DEFAULT, DEBEA_UNICODE_ON, DEBEA_UNICODE_OFF } |
| Should driver use UNICODE capability. | |
Public Member Functions | |
| virtual void | begin ()=0 |
| Start transaction. | |
| virtual void | commit ()=0 |
| Commit transaction. | |
| void | decUsed () |
| Decrease usage counter. | |
| virtual void | disconnect ()=0 |
| disconnect. | |
| virtual std::list< std::string > | getRelationNames ()=0 |
| Get list of relations that connected database advertise to us This list does not contain system tables, only ones that are created by user. | |
| void | incUsed () |
| Increase usage counter. | |
| bool | isUsed () const |
| Check if connection is used. | |
| virtual bool | isValid () const =0 |
| Check if connection is valid. | |
| virtual void | rollback ()=0 |
| Rollback transaction. | |
| DbResult * | sendQuery (const char *pSql) |
| Send SQL SELECT to database. | |
| DbResult * | sendQuery (const std::string &pSql) |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
| int | sendUpdate (const std::string &pSql) |
| This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. | |
| int | sendUpdate (const char *pSql) |
| Send SQL update commands to database. | |
| virtual | ~DbConnection () |
| Destructor. | |
Protected Member Functions | |
| virtual DbResult * | execQuery (const char *pSql)=0 |
| Override with database specific implementation. | |
| virtual int | execUpdate (const char *pSql)=0 |
| Override with database specific implementation. | |
Protected Attributes | |
| int | mUseCount |
| Usage counter used by streams. | |
Detailed Description
This class represents connection to database.You can send commands or queries to database using this connection object. Most databases does not support multiple query processing on single connection so if you use sendQuery() method for a second time be sure that DbResult from first query is destroyed or all rows are fetched.
Member Function Documentation
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Decrease usage counter. Used by streams. |
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disconnect. After you call this method isValid() will return false. |
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Override with database specific implementation.
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Override with database specific implementation.
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Increase usage counter. Used by streams. |
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Check if connection is used. This flag is useful for classes that will control connection object, ie. Database connection managers. |
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Check if connection is valid. Connection can be invalid because of protocol error or broken connection to backend server
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Send SQL SELECT to database.
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Send SQL update commands to database.
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The documentation for this class was generated from the following file:
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