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+/**
+ * vim: set ts=4 :
+ * =============================================================================
+ * SourceMod (C)2004-2008 AlliedModders LLC.  All rights reserved.
+ * =============================================================================
+ *
+ * This file is part of the SourceMod/SourcePawn SDK.
+ *
+ * This program is free software; you can redistribute it and/or modify it under
+ * the terms of the GNU General Public License, version 3.0, as published by the
+ * Free Software Foundation.
+ * 
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+ * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * As a special exception, AlliedModders LLC gives you permission to link the
+ * code of this program (as well as its derivative works) to "Half-Life 2," the
+ * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
+ * by the Valve Corporation.  You must obey the GNU General Public License in
+ * all respects for all other code used.  Additionally, AlliedModders LLC grants
+ * this exception to all derivative works.  AlliedModders LLC defines further
+ * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
+ * or <http://www.sourcemod.net/license.php>.
+ *
+ * Version: $Id$
+ */
+ 
+#if defined _dbi_included
+ #endinput
+#endif
+#define _dbi_included
+
+/**
+ * @handle Driver
+ *
+ * Contains information about an SQL driver.
+ */
+ 
+/**
+ * @handle Database
+ *
+ * Contains information about a database connection.
+ */
+ 
+/**
+ * @handle Query
+ *
+ * Contains information about an active query and its 
+ * result sets.
+ */
+ 
+/**
+ * @handle Statement : Query
+ *
+ * Extends a Query Handle and can be used as a Query Handle.
+ * Statement Handles are for prepared queries and contain
+ * their own function for binding parameters.  Statement
+ * Handles can be used instead of database Handles in a few
+ * select functions.
+ */
+
+/**
+ * Describes a database field fetch status.
+ */
+enum DBResult
+{
+	DBVal_Error = 0,		/**< Column number/field is invalid. */
+	DBVal_TypeMismatch = 1,	/**< You cannot retrieve this data with this type. */
+	DBVal_Null = 2,			/**< Field has no data (NULL) */
+	DBVal_Data = 3,			/**< Field has data */
+};
+
+/**
+ * Describes binding types.
+ */
+enum DBBindType
+{
+	DBBind_Int = 0,			/**< Bind an integer. */
+	DBBind_Float = 1,		/**< Bind a float. */
+	DBBind_String = 2,		/**< Bind a string. */
+};
+
+/**
+ * Threading priority level.
+ */
+enum DBPriority
+{
+	DBPrio_High = 0,		/**< High priority. */
+	DBPrio_Normal = 1,		/**< Normal priority. */
+	DBPrio_Low = 2,			/**< Low priority. */
+};
+
+/**
+ * Creates an SQL connection from a named configuration.
+ *
+ * @param confname		Named configuration.
+ * @param persistent	True to re-use a previous persistent connection if
+ *						possible, false otherwise.
+ * @param error			Error buffer.
+ * @param maxlength		Maximum length of the error buffer.
+ * @return				A database connection Handle, or INVALID_HANDLE on failure.
+ */
+native Handle:SQL_Connect(const String:confname[], bool:persistent, String:error[], maxlength);
+
+/**
+ * Creates a default SQL connection.
+ *
+ * @param error			Error buffer.
+ * @param maxlength		Maximum length of the error buffer.
+ * @param persistent	True to re-use a previous persistent connection
+ *						if possible, false otherwise.
+ * @return				A database connection Handle, or INVALID_HANDLE on failure.
+ * 						On failure the error buffer will be filled with a message.
+ */
+stock Handle:SQL_DefConnect(String:error[], maxlength, bool:persistent=true)
+{
+	return SQL_Connect("default", persistent, error, maxlength);
+}
+
+/**
+ * Connects to a database using key value pairs containing the database info.
+ * The key/value pairs should match what would be in databases.cfg.
+ *
+ * I.e. "driver" should be "default" or a driver name (or ommitted for 
+ * the default).  For SQLite, only the "database" parameter is needed in addition.
+ * For drivers which require external connections, more of the parameters may be 
+ * needed.
+ *
+ * In general it is discouraged to use this function.  Connections should go through 
+ * databases.cfg for greatest flexibility on behalf of users.
+ *
+ * @param keyvalues		Key/value pairs from a KeyValues handle, describing the connection.
+ * @param error			Error buffer.
+ * @param maxlength		Maximum length of the error buffer.
+ * @param persistent	True to re-use a previous persistent connection if
+ *						possible, false otherwise.
+ * @return				A database connection Handle, or INVALID_HANDLE on failure.
+ * 						On failure the error buffer will be filled with a message.
+ * @error				Invalid KeyValues handle.
+ */
+native Handle:SQL_ConnectCustom(Handle:keyvalues,
+								String:error[],
+								maxlength,
+								bool:persistent);
+
+/**
+ * Grabs a handle to an SQLite database, creating one if it does not exist.  
+ *
+ * Unless there are extenuating circumstances, you should consider using "sourcemod-local" as the 
+ * database name.  This provides some unification between plugins on behalf of users.
+ *
+ * As a precaution, you should always create some sort of unique prefix to your table names so 
+ * there are no conflicts, and you should never drop or modify tables that you do not own.
+ *
+ * @param database		Database name.  
+ * @param error			Error buffer.
+ * @param maxlength		Maximum length of the error buffer.
+ * @return				A database connection Handle, or INVALID_HANDLE on failure.
+ * 						On failure the error buffer will be filled with a message.
+ */
+stock Handle:SQLite_UseDatabase(const String:database[],
+								String:error[], 
+								maxlength)
+{
+	new Handle:kv, Handle:db;
+
+	kv = CreateKeyValues("");
+	KvSetString(kv, "driver", "sqlite");
+	KvSetString(kv, "database", database);
+
+	db = SQL_ConnectCustom(kv, error, maxlength, false);
+
+	CloseHandle(kv);
+
+	return db;
+}
+
+/**
+ * This function is deprecated.  Use SQL_ConnectCustom or SQLite_UseDatabase instead.
+ */
+#pragma deprecated Use SQL_ConnectCustom instead.
+native Handle:SQL_ConnectEx(Handle:driver, 
+							const String:host[],
+							const String:user[], 
+							const String:pass[],
+							const String:database[],
+							String:error[],
+							maxlength,
+							bool:persistent=true,
+							port=0,
+							maxTimeout=0);
+							
+/**
+ * Returns if a named configuration is present in databases.cfg.
+ *
+ * @param name			Configuration name.
+ * @return				True if it exists, false otherwise.
+ */
+native bool:SQL_CheckConfig(const String:name[]);
+
+/**
+ * Returns a driver Handle from a name string.
+ *
+ * If the driver is not found, SourceMod will attempt
+ * to load an extension named dbi.<name>.ext.[dll|so].
+ *
+ * @param name			Driver identification string, or an empty
+ *						string to return the default driver.
+ * @return				Driver Handle, or INVALID_HANDLE on failure.
+ */
+native Handle:SQL_GetDriver(const String:name[]="");
+
+/**
+ * Reads the driver of an opened database.
+ *
+ * @param database		Database Handle.
+ * @param ident			Option buffer to store the identification string.
+ * @param ident_length	Maximum length of the buffer.
+ * @return				Driver Handle.
+ */
+native Handle:SQL_ReadDriver(Handle:database, String:ident[]="", ident_length=0);
+
+/**
+ * Retrieves a driver's identification string.
+ *
+ * Example: "mysql", "sqlite"
+ *
+ * @param driver		Driver Handle, or INVALID_HANDLE for the default driver.
+ * @param ident			Identification string buffer.
+ * @param maxlength		Maximum length of the buffer.
+ * @noreturn
+ * @error				Invalid Handle other than INVALID_HANDLE.
+ */
+native SQL_GetDriverIdent(Handle:driver, String:ident[], maxlength);
+
+/**
+ * Retrieves a driver's product string.
+ *
+ * Example: "MySQL", "SQLite"
+ *
+ * @param driver		Driver Handle, or INVALID_HANDLE for the default driver.
+ * @param product		Product string buffer.
+ * @param maxlength		Maximum length of the buffer.
+ * @noreturn
+ * @error				Invalid Handle other than INVALID_HANDLE.
+ */
+native SQL_GetDriverProduct(Handle:driver, String:product[], maxlength);
+
+/**
+ * Sets the character set of the current connection. 
+ * Like SET NAMES .. in mysql, but stays after connection problems.
+ * 
+ * Example: "utf8", "latin1"
+ *
+ * @param database      Database Handle.
+ * @param characterset  The character set string to change to.
+ * @return              True, if character set was changed, false otherwise.
+ */
+native bool:SQL_SetCharset(Handle:database, const String:charset[]);
+
+/**
+ * Returns the number of affected rows from the last query.
+ *
+ * @param hndl			A database OR statement Handle.
+ * @return				Number of rows affected by the last query.
+ * @error				Invalid database or statement Handle.
+ */
+native SQL_GetAffectedRows(Handle:hndl);
+
+/**
+ * Returns the last query's insertion id.
+ *
+ * @param hndl			A database, query, OR statement Handle.
+ * @return				Last query's insertion id.
+ * @error				Invalid database, query, or statement Handle.
+ */
+native SQL_GetInsertId(Handle:hndl);
+
+/**
+ * Returns the error reported by the last query.
+ *
+ * @param hndl			A database, query, OR statement Handle.
+ * @param error			Error buffer.
+ * @param maxlength		Maximum length of the buffer.
+ * @return				True if there was an error, false otherwise.
+ * @error				Invalid database, query, or statement Handle.
+ */
+native bool:SQL_GetError(Handle:hndl, String:error[], maxlength);
+
+/**
+ * Escapes a database string for literal insertion.  This is not needed
+ * for binding strings in prepared statements.  
+ *
+ * Generally, database strings are inserted into queries enclosed in 
+ * single quotes (').  If user input has a single quote in it, the 
+ * quote needs to be escaped.  This function ensures that any unsafe 
+ * characters are safely escaped according to the database engine and 
+ * the database's character set.
+ *
+ * NOTE: SourceMod only guarantees properly escaped strings when the query
+ * encloses the string in ''. While drivers tend to allow " instead, the string
+ * may be not be escaped (for example, on SQLite)!
+ *
+ * @param database			A database Handle.
+ * @param string		String to quote.
+ * @param buffer		Buffer to store quoted string in.
+ * @param maxlength		Maximum length of the buffer.
+ * @param written		Optionally returns the number of bytes written.
+ * @return				True on success, false if buffer is not big enough.
+ *						The buffer must be at least 2*strlen(string)+1.
+ * @error				Invalid database or statement Handle.
+ */
+native bool:SQL_EscapeString(Handle:database, 
+							 const String:string[], 
+							 String:buffer[], 
+							 maxlength, 
+							 &written=0);
+
+/**
+ * This is a backwards compatibility stock.  You should use SQL_EscapeString() 
+ * instead, as this function will probably be deprecated in SourceMod 1.1.
+ */
+stock bool:SQL_QuoteString(Handle:database,
+						   const String:string[],
+						   String:buffer[],
+						   maxlength,
+						   &written=0)
+{
+	return SQL_EscapeString(database, string, buffer, maxlength, written);
+}
+
+/**
+ * Executes a query and ignores the result set.
+ *
+ * @param database		A database Handle.
+ * @param query			Query string.
+ * @param len			Optional parameter to specify the query length, in 
+ *						bytes.  This can be used to send binary queries that 
+ * 						have a premature terminator.
+ * @return				True if query succeeded, false otherwise.  Use
+ *						SQL_GetError to find the last error.
+ * @error				Invalid database Handle.
+ */
+native bool:SQL_FastQuery(Handle:database, const String:query[], len=-1);
+
+/**
+ * Executes a simple query and returns a new query Handle for
+ * receiving the results.
+ *
+ * @param database		A database Handle.
+ * @param query			Query string.
+ * @param len			Optional parameter to specify the query length, in 
+ *						bytes.  This can be used to send binary queries that 
+ * 						have a premature terminator.
+ * @return				A new Query Handle on success, INVALID_HANDLE
+ *						otherwise.  The Handle must be freed with CloseHandle().
+ * @error				Invalid database Handle.
+ */
+native Handle:SQL_Query(Handle:database, const String:query[], len=-1);
+
+/**
+ * Creates a new prepared statement query.  Prepared statements can
+ * be executed any number of times.  They can also have placeholder
+ * parameters, similar to variables, which can be bound safely and
+ * securely (for example, you do not need to quote bound strings).
+ *
+ * Statement handles will work in any function that accepts a Query handle.
+ *
+ * @param database		A database Handle.
+ * @param query			Query string.
+ * @param error			Error buffer.
+ * @param maxlength		Maximum size of the error buffer.
+ * @return				A new statement Handle on success, INVALID_HANDLE
+ *						otherwise.  The Handle must be freed with CloseHandle().
+ * @error				Invalid database Handle.
+ */
+native Handle:SQL_PrepareQuery(Handle:database, const String:query[], String:error[], maxlength);
+
+/**
+ * Advances to the next set of results.
+ *
+ * In some SQL implementations, multiple result sets can exist on one query.  
+ * This is possible in MySQL with simple queries when executing a CALL 
+ * query.  If this is the case, all result sets must be processed before
+ * another query is made.
+ *
+ * @param query			A query Handle.
+ * @return				True if there was another result set, false otherwise.
+ * @error				Invalid query Handle.
+ */
+native bool:SQL_FetchMoreResults(Handle:query);
+
+/**
+ * Returns whether or not a result set exists.  This will
+ * return true even if 0 results were returned, but false
+ * on queries like UPDATE, INSERT, or DELETE.
+ *
+ * @param query			A query (or statement) Handle.
+ * @return				True if there is a result set, false otherwise.
+ * @error				Invalid query Handle.
+ */
+native bool:SQL_HasResultSet(Handle:query);
+
+/**
+ * Retrieves the number of rows in the last result set.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @return				Number of rows in the current result set.
+ * @error				Invalid query Handle.
+ */
+native SQL_GetRowCount(Handle:query);
+
+/**
+ * Retrieves the number of fields in the last result set.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @return				Number of fields in the current result set.
+ * @error				Invalid query Handle.
+ */
+native SQL_GetFieldCount(Handle:query);
+
+/**
+ * Retrieves the name of a field by index.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param field			Field number (starting from 0).
+ * @param name			Name buffer.
+ * @param maxlength		Maximum length of the name buffer.
+ * @noreturn
+ * @error				Invalid query Handle, invalid field index, or
+ *						no current result set.
+ */
+native SQL_FieldNumToName(Handle:query, field, String:name[], maxlength);
+
+/**
+ * Retrieves a field index by name.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param name			Name of the field (case sensitive).
+ * @param field			Variable to store field index in.
+ * @return				True if found, false if not found.
+ * @error				Invalid query Handle or no current result set.
+ */
+native bool:SQL_FieldNameToNum(Handle:query, const String:name[], &field);
+
+/**
+ * Fetches a row from the current result set.  This must be 
+ * successfully called before any results are fetched.
+ *
+ * If this function fails, SQL_MoreResults() can be used to
+ * tell if there was an error or the result set is finished.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @return				True if a row was fetched, false otherwise.
+ * @error				Invalid query Handle.
+ */
+native bool:SQL_FetchRow(Handle:query);
+
+/**
+ * Returns if there are more rows.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @return				True if there are more rows, false otherwise.
+ * @error				Invalid query Handle.
+ */
+native bool:SQL_MoreRows(Handle:query);
+
+/**
+ * Rewinds a result set back to the first result.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @return				True on success, false otherwise.
+ * @error				Invalid query Handle or no current result set.
+ */
+native bool:SQL_Rewind(Handle:query);
+
+/**
+ * Fetches a string from a field in the current row of a result set.  
+ * If the result is NULL, an empty string will be returned.  A NULL 
+ * check can be done with the result parameter, or SQL_IsFieldNull().
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param field			The field index (starting from 0).
+ * @param buffer		String buffer.
+ * @param maxlength		Maximum size of the string buffer.
+ * @param result		Optional variable to store the status of the return value.
+ * @return				Number of bytes written.
+ * @error				Invalid query Handle or field index, invalid
+ *						type conversion requested from the database,
+ *						or no current result set.
+ */
+native SQL_FetchString(Handle:query, field, String:buffer[], maxlength, &DBResult:result=DBVal_Error);
+
+/**
+ * Fetches a float from a field in the current row of a result set.  
+ * If the result is NULL, a value of 0.0 will be returned.  A NULL 
+ * check can be done with the result parameter, or SQL_IsFieldNull().
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param field			The field index (starting from 0).
+ * @param result		Optional variable to store the status of the return value.
+ * @return				A float value.
+ * @error				Invalid query Handle or field index, invalid
+ *						type conversion requested from the database,
+ *						or no current result set.
+ */
+native Float:SQL_FetchFloat(Handle:query, field, &DBResult:result=DBVal_Error);
+
+/**
+ * Fetches an integer from a field in the current row of a result set.  
+ * If the result is NULL, a value of 0 will be returned.  A NULL 
+ * check can be done with the result parameter, or SQL_IsFieldNull().
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param field			The field index (starting from 0).
+ * @param result		Optional variable to store the status of the return value.
+ * @return				An integer value.
+ * @error				Invalid query Handle or field index, invalid
+ *						type conversion requested from the database,
+ *						or no current result set.
+ */
+native SQL_FetchInt(Handle:query, field, &DBResult:result=DBVal_Error);
+
+/**
+ * Returns whether a field's data in the current row of a result set is 
+ * NULL or not.  NULL is an SQL type which means "no data."
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param field			The field index (starting from 0).
+ * @return				True if data is NULL, false otherwise.
+ * @error				Invalid query Handle or field index, or no
+ *						current result set.
+ */
+native bool:SQL_IsFieldNull(Handle:query, field);
+
+/**
+ * Returns the length of a field's data in the current row of a result
+ * set.  This only needs to be called for strings to determine how many
+ * bytes to use.  Note that the return value does not include the null
+ * terminator.
+ * 
+ * @param query			A query (or statement) Handle.
+ * @param field			The field index (starting from 0).
+ * @return				Number of bytes for the field's data size.
+ * @error				Invalid query Handle or field index or no
+ *						current result set.
+ */
+native SQL_FetchSize(Handle:query, field);
+
+/**
+ * Binds a parameter in a prepared statement to a given integer value.
+ * 
+ * @param statement		A statement (prepared query) Handle.
+ * @param param			The parameter index (starting from 0).
+ * @param number		The number to bind.
+ * @param signed		True to bind the number as signed, false to 
+ *						bind it as unsigned.
+ * @noreturn
+ * @error				Invalid statement Handle or parameter index, or
+ *						SQL error.
+ */
+native SQL_BindParamInt(Handle:statement, param, number, bool:signed=true);
+
+/**
+ * Binds a parameter in a prepared statement to a given float value.
+ * 
+ * @param statement		A statement (prepared query) Handle.
+ * @param param			The parameter index (starting from 0).
+ * @param value			The float number to bind.
+ * @noreturn
+ * @error				Invalid statement Handle or parameter index, or
+ *						SQL error.
+ */
+native SQL_BindParamFloat(Handle:statement, param, Float:value);
+
+/**
+ * Binds a parameter in a prepared statement to a given string value.
+ * 
+ * @param statement		A statement (prepared query) Handle.
+ * @param param			The parameter index (starting from 0).
+ * @param value			The string to bind.
+ * @param copy			Whether or not SourceMod should copy the value
+ *						locally if necessary.  If the string contents
+ *						won't change before calling SQL_Execute(), this
+ *						can be set to false for optimization.
+ * @noreturn
+ * @error				Invalid statement Handle or parameter index, or
+ *						SQL error.
+ */
+native SQL_BindParamString(Handle:statement, param, const String:value[], bool:copy);
+
+/**
+ * Executes a prepared statement.  All parameters must be bound beforehand.
+ *
+ * @param statement		A statement (prepared query) Handle.
+ * @return				True on success, false on failure.
+ * @error				Invalid statement Handle.
+ */
+native bool:SQL_Execute(Handle:statement);
+
+/**
+ * Locks a database so threading operations will not interrupt.
+ * 
+ * If you are using a database Handle for both threading and non-threading,
+ * this MUST be called before doing any set of non-threading DB operations.
+ * Otherwise you risk corrupting the database driver's memory or network
+ * connection.
+ * 
+ * Leaving a lock on a database and then executing a threaded query results
+ * in a dead lock! Make sure to call SQL_UnlockDatabase()!
+ *
+ * If the lock cannot be acquired, the main thread will pause until the 
+ * threaded operation has concluded.
+ *
+ * @param database		A database Handle.
+ * @noreturn
+ * @error				Invalid database Handle.
+ */
+native SQL_LockDatabase(Handle:database);
+
+/**
+ * Unlocks a database so threading operations may continue.
+ *
+ * @param database		A database Handle.
+ * @noreturn
+ * @error				Invalid database Handle.
+ */
+native SQL_UnlockDatabase(Handle:database);
+
+/**
+ * General callback for threaded SQL stuff.
+ *
+ * @param owner			Parent object of the Handle (or INVALID_HANDLE if none).
+ * @param hndl			Handle to the child object (or INVALID_HANDLE if none).
+ * @param error			Error string if there was an error.  The error could be 
+ *						empty even if an error condition exists, so it is important 
+ *						to check the actual Handle value instead.
+ * @param data			Data passed in via the original threaded invocation.
+ * @param 
+ */
+functag public SQLTCallback(Handle:owner, Handle:hndl, const String:error[], any:data);
+
+/**
+ * Tells whether two database handles both point to the same database 
+ * connection.
+ *
+ * @param hndl1			First database Handle.
+ * @param hndl2			Second database Handle.
+ * @return				True if the Handles point to the same 
+ *						connection, false otherwise.
+ * @error				Invalid Handle.
+ */
+native bool:SQL_IsSameConnection(Handle:hndl1, Handle:hndl2);
+
+/**
+ * Connects to a database via a thread.  This can be used instead of
+ * SQL_Connect() if you wish for non-blocking functionality.
+ *
+ * It is not necessary to use this to use threaded queries.  However, if you 
+ * don't (or you mix threaded/non-threaded queries), you should see 
+ * SQL_LockDatabase().
+ *
+ * @param callback		Callback; new Handle will be in hndl, owner is the driver.
+ *						If no driver was found, the owner is INVALID_HANDLE.
+ * @param name			Database name.
+ * @param data			Extra data value to pass to the callback.
+ * @noreturn
+ */
+native SQL_TConnect(SQLTCallback:callback, const String:name[]="default", any:data=0);
+
+/**
+ * Executes a simple query via a thread.  The query Handle is passed through
+ * the callback.
+ *
+ * The database Handle returned through the callback is always a new Handle,
+ * and if necessary, SQL_IsSameConnection() should be used to test against
+ * other conenctions.
+ *
+ * The query Handle returned through the callback is temporary and destroyed 
+ * at the end of the callback.  If you need to hold onto it, use CloneHandle().
+ *
+ * @param database		A database Handle.
+ * @param callback		Callback; database is in "owner" and the query Handle
+ *						is passed in "hndl".
+ * @param query			Query string.
+ * @param data			Extra data value to pass to the callback.
+ * @param prio			Priority queue to use.
+ * @noreturn
+ * @error				Invalid database Handle.
+ */
+native SQL_TQuery(Handle:database, SQLTCallback:callback, const String:query[], any:data=0, DBPriority:prio=DBPrio_Normal);
+
+/**
+ * Creates a new transaction object. A transaction object is a list of queries
+ * that can be sent to the database thread and executed as a single transaction.
+ *
+ * @return              A transaction handle.
+ */
+native Handle:SQL_CreateTransaction();
+
+/**
+ * Adds a query to a transaction object.
+ *
+ * @param txn           A transaction handle.
+ * @param query         Query string.
+ * @param data			Extra data value to pass to the final callback.
+ * @return              The index of the query in the transaction's query list.
+ * @error               Invalid transaction handle.
+ */
+native SQL_AddQuery(Handle:txn, const String:query[], any:data=0);
+
+/**
+ * Callback for a successful transaction.
+ *
+ * @param db            Database handle.
+ * @param data          Data value passed to SQL_ExecuteTransaction().
+ * @param numQueries    Number of queries executed in the transaction.
+ * @param results       An array of Query handle results, one for each of numQueries. They are closed automatically.
+ * @param queryData     An array of each data value passed to SQL_AddQuery().
+ * @noreturn
+ */
+functag public SQLTxnSuccess(Handle:db, any:data, numQueries, Handle:results[], any:queryData[]);
+
+/**
+ * Callback for a failed transaction.
+ *
+ * @param db            Database handle.
+ * @param data          Data value passed to SQL_ExecuteTransaction().
+ * @param numQueries    Number of queries executed in the transaction.
+ * @param error         Error message.
+ * @param failIndex      Index of the query that failed, or -1 if something else.
+ * @param queryData     An array of each data value passed to SQL_AddQuery().
+ * @noreturn
+ */
+functag public SQLTxnFailure(Handle:db, any:data, numQueries, const String:error[], failIndex, any:queryData[]);
+
+/**
+ * Sends a transaction to the database thread. The transaction handle is
+ * automatically closed. When the transaction completes, the optional
+ * callback is invoked.
+ *
+ * @param db            A database handle.
+ * @param txn           A transaction handle.
+ * @param onSuccess     An optional callback to receive a successful transaction.
+ * @param onError       An optional callback to receive an error message.
+ * @param data          An optional value to pass to callbacks.
+ * @param prio          Priority queue to use.
+ * @noreturn
+ * @error               An invalid handle.
+ */
+native SQL_ExecuteTransaction(
+		Handle:db,
+		Handle:txn,
+		SQLTxnSuccess:onSuccess=SQLTxnSuccess:-1,
+		SQLTxnFailure:onError=SQLTxnFailure:-1,
+		any:data=0,
+		DBPriority:priority=DBPrio_Normal);