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[11284] Implement prepared statements for INSERT+DELETE+UPDATE SQL requests. Should improve player save performance + lower MySQL server CPU usage.

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Note: PostgreSQL does not have prepared statements implemented using native APIs.

Huge thanks to Undergarun, kero99 and Vinolentus.

Signed-off-by: Ambal <pogrebniak@gala.net>
This commit is contained in:
Ambal 2011-03-25 21:52:59 +02:00
parent d9374d936f
commit 40ef9cbf2f
24 changed files with 1823 additions and 488 deletions
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38
src/shared/Database/SqlOperations.h
View file

@ -31,43 +31,53 @@
class Database;
class SqlConnection;
class SqlDelayThread;
class SqlStmtParameters;
class SqlOperation
{
public:
virtual void OnRemove() { delete this; }
virtual void Execute(SqlConnection *conn) = 0;
virtual bool Execute(SqlConnection *conn) = 0;
virtual ~SqlOperation() {}
};
/// ---- ASYNC STATEMENTS / TRANSACTIONS ----
class SqlStatement : public SqlOperation
class SqlPlainRequest : public SqlOperation
{
private:
const char *m_sql;
public:
SqlStatement(const char *sql) : m_sql(mangos_strdup(sql)){}
~SqlStatement() { char* tofree = const_cast<char*>(m_sql); delete [] tofree; }
void Execute(SqlConnection *conn);
SqlPlainRequest(const char *sql) : m_sql(mangos_strdup(sql)){}
~SqlPlainRequest() { char* tofree = const_cast<char*>(m_sql); delete [] tofree; }
bool Execute(SqlConnection *conn);
};
class SqlTransaction : public SqlOperation
{
private:
std::vector<const char *> m_queue;
std::vector<SqlOperation * > m_queue;
public:
SqlTransaction() {}
~SqlTransaction();
void DelayExecute(const char *sql)
{
char* _sql = mangos_strdup(sql);
m_queue.push_back(_sql);
}
void DelayExecute(SqlOperation * sql) { m_queue.push_back(sql); }
void Execute(SqlConnection *conn);
bool Execute(SqlConnection *conn);
};
class SqlPreparedRequest : public SqlOperation
{
public:
SqlPreparedRequest(int nIndex, SqlStmtParameters * arg);
~SqlPreparedRequest();
bool Execute(SqlConnection *conn);
private:
const int m_nIndex;
SqlStmtParameters * m_param;
};
/// ---- ASYNC QUERIES ----
@ -95,7 +105,7 @@ class SqlQuery : public SqlOperation
SqlQuery(const char *sql, MaNGOS::IQueryCallback * callback, SqlResultQueue * queue)
: m_sql(mangos_strdup(sql)), m_callback(callback), m_queue(queue) {}
~SqlQuery() { char* tofree = const_cast<char*>(m_sql); delete [] tofree; }
void Execute(SqlConnection *conn);
bool Execute(SqlConnection *conn);
};
class SqlQueryHolder
@ -124,6 +134,6 @@ class SqlQueryHolderEx : public SqlOperation
public:
SqlQueryHolderEx(SqlQueryHolder *holder, MaNGOS::IQueryCallback * callback, SqlResultQueue * queue)
: m_holder(holder), m_callback(callback), m_queue(queue) {}
void Execute(SqlConnection *conn);
bool Execute(SqlConnection *conn);
};
#endif //__SQLOPERATIONS_H