// ------------------------------------------------------------------------------------------------ #include "Connection.hpp" #include "Statement.hpp" #include "Module.hpp" // ------------------------------------------------------------------------------------------------ #include // ------------------------------------------------------------------------------------------------ namespace SqMod { // ------------------------------------------------------------------------------------------------ SQInteger Connection::Typename(HSQUIRRELVM vm) { static SQChar name[] = _SC("SqSQLiteConnection"); sq_pushstring(vm, name, sizeof(name)); return 1; } // ------------------------------------------------------------------------------------------------ void Connection::Validate() const { // Is the handle valid? if (!m_Handle) SqThrowF("Invalid SQLite connection reference"); } // ------------------------------------------------------------------------------------------------ Connection::Connection() : m_Handle() { /* ... */ } // ------------------------------------------------------------------------------------------------ Connection::Connection(CSStr name) : m_Handle(name) { if (m_Handle.m_Hnd) m_Handle->Create(name, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL); } // ------------------------------------------------------------------------------------------------ Connection::Connection(CSStr name, Int32 flags) : m_Handle(name) { if (m_Handle.m_Hnd) m_Handle->Create(name, flags, NULL); } // ------------------------------------------------------------------------------------------------ Connection::Connection(CSStr name, Int32 flags, CSStr vfs) : m_Handle(name) { if (m_Handle.m_Hnd) m_Handle->Create(name, flags, vfs); } // ------------------------------------------------------------------------------------------------ Int32 Connection::Exec(CSStr str) { // Validate the handle Validate(); // Attempt to execute the specified query if ((m_Handle = sqlite3_exec(m_Handle, str, NULL, NULL, NULL)) != SQLITE_OK) SqThrowF("Unable to execute query [%s]", m_Handle.ErrMsg()); // Return rows affected by this query return sqlite3_changes(m_Handle); } // ------------------------------------------------------------------------------------------------ Object Connection::Query(CSStr str) const { // Validate the handle Validate(); // Return the requested information return Object(new Statement(m_Handle, str)); } // ------------------------------------------------------------------------------------------------ void Connection::Queue(CSStr str) { // Validate the handle Validate(); // Is there a query to commit? if (IsQueryEmpty(str)) SqThrowF("No query string to queue"); // Add the specified string to the queue m_Handle->mQueue.push_back(str); } // ------------------------------------------------------------------------------------------------ bool Connection::IsReadOnly() const { // Validate the handle Validate(); // Request the desired information const int result = sqlite3_db_readonly(m_Handle, "main"); // Verify the result if (result == -1) SqThrowF("'main' is not the name of a database on connection"); // Return the requested information return (result != 1); } // ------------------------------------------------------------------------------------------------ bool Connection::TableExists(CCStr name) const { // Validate the handle Validate(); // Prepare a statement to inspect the master table Statement stmt(m_Handle, "SELECT count(*) FROM [sqlite_master] WHERE [type]='table' AND [name]=?"); // Could the statement be created? if (stmt.IsValid()) { // Bind the specified name onto the statement parameter stmt.IndexBindS(1, name); // Attempt to step the statement and obtain a value if (stmt.Step()) return (sqlite3_column_int(stmt, 0) == 1); } // Assume it doesn't exist return false; } // ------------------------------------------------------------------------------------------------ Object Connection::GetLastInsertRowID() const { // Validate the handle Validate(); // Obtain the initial stack size const StackGuard sg(_SqVM); // Push a long integer instance with the requested value on the stack _SqMod->PushSLongObject(_SqVM, sqlite3_last_insert_rowid(m_Handle)); // Get the object from the stack and return it return Var< Object >(_SqVM, -1).value; } // ------------------------------------------------------------------------------------------------ void Connection::SetBusyTimeout(Int32 millis) { // Validate the handle Validate(); // Apply requested timeout if ((m_Handle = sqlite3_busy_timeout(m_Handle, millis)) != SQLITE_OK) SqThrowF("Unable to set busy timeout [%s]", m_Handle.ErrMsg()); } // ------------------------------------------------------------------------------------------------ Int32 Connection::GetInfo(Int32 operation, bool highwater, bool reset) { // Don't even bother to continue if there's no valid connection handle Validate(); // Where to retrieve the information Int32 cur_value; Int32 hiwtr_value; // Attempt to retrieve the specified information if ((m_Handle = sqlite3_db_status(m_Handle, operation, &cur_value, &hiwtr_value, reset)) != SQLITE_OK) SqThrowF("Unable to get runtime status information", m_Handle.ErrMsg()); // Return the high-water value if requested else if (highwater) return hiwtr_value; // Return the requested information return cur_value; } // ------------------------------------------------------------------------------------------------ Connection Connection::CopyToMemory() { // Validate the handle Validate(); // Is the database already in memory? if (m_Handle->mMemory) SqThrowF("The database is already in memory"); // Destination database ConnHnd db(_SC("")); // Attempt to open the in-memory database db->Create(_SC(":memory:"), SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL); // Clear the temporary buffer GetTempBuff()[0] = 0; // Begin a transaction to replicate the schema of origin database if ((m_Handle = sqlite3_exec(m_Handle, "BEGIN", NULL, NULL, NULL)) != SQLITE_OK) SqThrowF("Unable to begin schema replication [%s]", m_Handle.ErrMsg()); // Attempt to replicate the schema of origin database to the in-memory one else if ((m_Handle = sqlite3_exec(m_Handle, "SELECT [sql] FROM [sqlite_master] WHERE [sql] NOT NULL AND [tbl_name] != 'sqlite_sequence'", &Connection::ProcessDDLRow, db->mPtr, NULL)) != SQLITE_OK) { // Did the error occurred from the DDL process function? if (GetTempBuff()[0] != 0) // Throw the resulted message but also include the point where it failed SqThrowF("Unable to replicate schema [%s]", GetTempBuff()); // Obtain the message from the connection handle if possible else SqThrowF("Unable to replicate schema [%s]", m_Handle.ErrMsg()); } // Attempt to commit the changes to the database schema replication else if ((m_Handle = sqlite3_exec(m_Handle, "COMMIT", NULL, NULL, NULL)) != SQLITE_OK) SqThrowF("Unable to commit schema replication [%s]", m_Handle.ErrMsg()); // Attempt to attach the origin database to the in-memory one else if ((db = sqlite3_exec(db, QFmtStr("ATTACH DATABASE '%q' as origin", m_Handle->mName.c_str()), NULL, NULL, NULL)) != SQLITE_OK) SqThrowF("Unable to attach origin [%s]", db.ErrMsg()); // Begin a transaction to replicate the data of origin database else if ((db = sqlite3_exec(db, "BEGIN", NULL, NULL, NULL) != SQLITE_OK)) SqThrowF("Unable to begin data replication [%s]", db.ErrMsg()); // Attempt to replicate the data of origin database to the in-memory one else if ((db = sqlite3_exec(db, "SELECT [name] FROM [origin.sqlite_master] WHERE [type]='table'", &Connection::ProcessDMLRow, db->mPtr, NULL)) != SQLITE_OK) { // Did the error occurred from the DML process function? if (GetTempBuff()[0] != 0) { // Throw the resulted message but also include the point where it failed SqThrowF("Unable to replicate data [%s]", GetTempBuff()); } // Obtain the message from the connection handle if possible else SqThrowF("Unable to replicate data [%s]", db.ErrMsg()); } // Attempt to commit the changes to the database data replication else if ((db = sqlite3_exec(db, "COMMIT", NULL, NULL, NULL)) != SQLITE_OK) { // Attempt to rollback changes from the data copy operation if ((db = sqlite3_exec(db, "ROLLBACK", NULL, NULL, NULL)) != SQLITE_OK) SqThrowF("Unable to rollback data replication [%s]", db.ErrMsg()); // Attempt to detach the disk origin from in-memory database else if ((db = sqlite3_exec(db, "DETACH DATABASE origin", NULL, NULL, NULL)) != SQLITE_OK) SqThrowF("Unable to detach origin [%s]", db.ErrMsg()); // Operation failed SqThrowF("Unable to commit data replication [%s]", db.ErrMsg()); } // At this point everything went fine and the database instance should be returned return Connection(db); } // ------------------------------------------------------------------------------------------------ void Connection::CopyToDatabase(const Connection & db) { // Make sure that we have two valid database handles Validate(); db.Validate(); // Attempt to take the snapshot and return the result TakeSnapshot(db.m_Handle); } // ------------------------------------------------------------------------------------------------ Int32 Connection::Flush(Uint32 num) { // Validate the handle Validate(); // We need to supply a null callback Object env; Function func; // Attempt to flush the requested amount of queries return m_Handle->Flush(num, env, func); } // ------------------------------------------------------------------------------------------------ Int32 Connection::Flush(Uint32 num, Object & env, Function & func) { // Validate the handle Validate(); // Attempt to flush the requested amount of queries return m_Handle->Flush(num, env, func); } // ------------------------------------------------------------------------------------------------ void Connection::TraceOutput(void * /*ptr*/, CCStr sql) { _SqMod->LogInf("SQLite Trace: %s", sql); } void Connection::ProfileOutput(void * /*ptr*/, CCStr sql, sqlite3_uint64 time) { _SqMod->LogInf("SQLite profile (time: %llu): %s", time, sql); } // ------------------------------------------------------------------------------------------------ int Connection::ProcessDDLRow(void * db, int columns_count, char ** values, char ** /*columns*/) { // Make sure that exactly one column exists in the result if (columns_count != 1) FmtStr("Error occurred during DDL: columns != 1"); // Execute the sql statement in values[0] in the received database connection else if (sqlite3_exec((sqlite3 *)db, values[0], NULL, NULL, NULL) != SQLITE_OK) FmtStr("Error occurred during DDL execution: %s", sqlite3_errmsg((sqlite3 *)db)); else // Continue processing return 0; // Operation aborted return -1; } int Connection::ProcessDMLRow(void * db, int columns_count, char ** values, char ** /*columns*/) { // Make sure that exactly one column exists in the result if (columns_count != 1) { FmtStr("Error occurred during DML: columns != 1"); // Operation aborted return -1; } // Generate the query string with the received values char * sql = sqlite3_mprintf("INSERT INTO main.%q SELECT * FROM origin.%q", values[0], values[0]); // Attempt to execute the generated query string on the received database connection if (sqlite3_exec((sqlite3 *)db, sql, NULL, NULL, NULL) != SQLITE_OK) FmtStr("Error occurred during DML execution: %s", sqlite3_errmsg((sqlite3 *)db)); else { // Free the generated query string sqlite3_free(sql); // Continue processing return 0; } // Free the generated query string sqlite3_free(sql); // Operation aborted return -1; } // ------------------------------------------------------------------------------------------------ void Connection::TakeSnapshot(const ConnHnd & destination) { // Attempt to initialize a backup structure sqlite3_backup * backup = sqlite3_backup_init(destination, "main", m_Handle, "main"); // See if the backup structure could be created if (!backup) SqThrowF("Unable to initialize the backup structure [%s]", destination.ErrMsg()); // -1 to copy the entire source database to the destination if ((m_Handle = sqlite3_backup_step(backup, -1)) != SQLITE_DONE) { // Finalize the backup structure first sqlite3_backup_finish(backup); // Now it's safe to throw the error SqThrowF("Unable to copy source [%s]", m_Handle.ErrStr()); } // Clean up resources allocated by sqlite3_backup_init() if ((m_Handle = sqlite3_backup_finish(backup)) != SQLITE_OK) SqThrowF("Unable to finalize backup [%s]", m_Handle.ErrStr()); } // ------------------------------------------------------------------------------------------------ SQInteger Connection::ExecF(HSQUIRRELVM vm) { const Int32 top = sq_gettop(vm); // Do we even have enough arguments? if (top <= 1) return sq_throwerror(vm, "Missing the query string"); // Obtain the connection instance Var< Connection * > inst(vm, 1); // Do we have a valid connection instance? if (!inst.value) return sq_throwerror(vm, "Invalid connection instance"); // Do we have a valid connection reference? else if (!inst.value->m_Handle) return sq_throwerror(vm, "Invalid SQLite connection reference"); // Is the specified message value a string or something convertible to string? else if (top == 2 && ((sq_gettype(vm, -1) == OT_STRING) || !SQ_FAILED(sq_tostring(vm, -1)))) { CCStr sql = NULL; // Attempt to retrieve the string from the stack if (SQ_FAILED(sq_getstring(vm, -1, &sql))) { // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); // Now we can throw the error message return sq_throwerror(vm, "Unable to retrieve the query"); } // Prevent the object from being destroyed once we pop it Var< Object > obj(vm, -1); // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); // Attempt to execute the specified query if ((inst.value->m_Handle = sqlite3_exec(inst.value->m_Handle, sql, NULL, NULL, NULL)) != SQLITE_OK) { // Generate the error message and throw the resulted string return sq_throwerror(vm, FmtStr("Unable to execute query [%s]", inst.value->m_Handle.ErrMsg())); } // Push the result onto the stack sq_pushinteger(vm, sqlite3_changes(inst.value->m_Handle)); } // Do we have enough values to call the format function? else if (top > 2) { SStr sql = NULL; SQInteger len = 0; // Attempt to generate the specified string format SQRESULT ret = sqstd_format(vm, 3, &len, &sql); // Did the format failed? if (SQ_FAILED(ret)) return ret; // Propagate the exception // Attempt to execute the resulted query if ((inst.value->m_Handle = sqlite3_exec(inst.value->m_Handle, sql, NULL, NULL, NULL)) != SQLITE_OK) { // Generate the error message and throw the resulted string return sq_throwerror(vm, FmtStr("Unable to execute query [%s]", inst.value->m_Handle.ErrMsg())); } // Push the result onto the stack sq_pushinteger(vm, sqlite3_changes(inst.value->m_Handle)); } // All methods of retrieving the string value failed else return sq_throwerror(vm, "Unable to extract the query string"); // At this point we should have a return value on the stack return 1; } // ------------------------------------------------------------------------------------------------ SQInteger Connection::QueueF(HSQUIRRELVM vm) { const Int32 top = sq_gettop(vm); // Do we even have enough arguments? if (top <= 1) return sq_throwerror(vm, "Missing the query string"); // Obtain the connection instance Var< Connection * > inst(vm, 1); // Do we have a valid connection instance? if (!inst.value) return sq_throwerror(vm, "Invalid connection instance"); // Do we have a valid connection reference? else if (!inst.value->m_Handle) return sq_throwerror(vm, "Invalid SQLite connection reference"); // Is the specified message value a string or something convertible to string? else if (top == 2 && ((sq_gettype(vm, -1) == OT_STRING) || !SQ_FAILED(sq_tostring(vm, -1)))) { CCStr sql = NULL; // Attempt to retrieve the string from the stack if (SQ_FAILED(sq_getstring(vm, -1, &sql))) { // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); // Now we can throw the error message return sq_throwerror(vm, "Unable to retrieve the query"); } // Is there even a query to queue? else if (IsQueryEmpty(sql)) { // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); // Now we can throw the error message return sq_throwerror(vm,"No query to queue"); } // Attempt to queue the specified query inst.value->m_Handle->mQueue.push_back(sql); // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); } // Do we have enough values to call the format function? else if (top > 2) { SStr sql = NULL; SQInteger len = 0; // Attempt to generate the specified string format SQRESULT ret = sqstd_format(vm, 3, &len, &sql); // Did the format failed? if (SQ_FAILED(ret)) return ret; // Propagate the exception // Is there even a query to queue? else if (IsQueryEmpty(sql)) return sq_throwerror(vm,"No query to queue"); // Attempt to queue the specified query inst.value->m_Handle->mQueue.push_back(sql); } // All methods of retrieving the string value failed else return sq_throwerror(vm, "Unable to extract the query string"); // This function does not return a value return 0; } // ------------------------------------------------------------------------------------------------ SQInteger Connection::QueryF(HSQUIRRELVM vm) { const Int32 top = sq_gettop(vm); // Do we even have enough arguments? if (top <= 1) return sq_throwerror(vm, "Missing the query string"); // Obtain the connection instance Var< Connection * > inst(vm, 1); // Do we have a valid connection instance? if (!inst.value) return sq_throwerror(vm, "Invalid connection instance"); // Do we have a valid connection reference? else if (!inst.value->m_Handle) return sq_throwerror(vm, "Invalid SQLite connection reference"); // Is the specified message value a string or something convertible to string? else if (top == 2 && ((sq_gettype(vm, -1) == OT_STRING) || !SQ_FAILED(sq_tostring(vm, -1)))) { CCStr sql = NULL; // Attempt to retrieve the string from the stack if (SQ_FAILED(sq_getstring(vm, -1, &sql))) { // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); // Now we can throw the error message return sq_throwerror(vm, "Unable to retrieve the query"); } // Prevent the object from being destroyed once we pop it Var< Object > obj(vm, -1); // If the value was converted to a string then pop the string sq_pop(vm, sq_gettop(vm) - top); // Attempt to create a statement with the specified query try { ClassType< Statement >::PushInstance(vm, new Statement(inst.value->m_Handle, sql)); } catch (const Sqrat::Exception & e) { return sq_throwerror(vm, e.Message().c_str()); } } // Do we have enough values to call the format function? else if (top > 2) { SStr sql = NULL; SQInteger len = 0; // Attempt to generate the specified string format SQRESULT ret = sqstd_format(vm, 3, &len, &sql); // Did the format failed? if (SQ_FAILED(ret)) return ret; // Propagate the exception // Attempt to create a statement with the specified query try { ClassType< Statement >::PushInstance(vm, new Statement(inst.value->m_Handle, sql)); } catch (const Sqrat::Exception & e) { return sq_throwerror(vm, e.Message().c_str()); } } // All methods of retrieving the string value failed else return sq_throwerror(vm, "Unable to extract the query string"); // At this point we should have a return value on the stack return 1; } } // Namespace:: SqMod