You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
498 lines
12 KiB
498 lines
12 KiB
/****************************************************************************
|
|
**
|
|
** Implementation of SQLite driver classes.
|
|
**
|
|
** Copyright (C) 1992-2003 Trolltech AS. All rights reserved.
|
|
**
|
|
** This file is part of the sql module of the TQt GUI Toolkit.
|
|
** EDITIONS: FREE, ENTERPRISE
|
|
**
|
|
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
|
|
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
**
|
|
****************************************************************************/
|
|
|
|
#include "qsql_sqlite3.h"
|
|
|
|
#include <ntqdatetime.h>
|
|
#include <ntqvaluevector.h>
|
|
#include <ntqregexp.h>
|
|
#include <ntqfile.h>
|
|
#include <sqlite3.h>
|
|
#include <ntqptrvector.h>
|
|
#if !defined Q_WS_WIN32
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
typedef struct sqlite3_stmt sqlite3_stmt;
|
|
|
|
#define TQSQLITE3_DRIVER_NAME "TQSQLITE3"
|
|
|
|
static TQVariant::Type qSqliteType(int tp)
|
|
{
|
|
switch (tp) {
|
|
case SQLITE_INTEGER:
|
|
return TQVariant::Int;
|
|
case SQLITE_FLOAT:
|
|
return TQVariant::Double;
|
|
case SQLITE_BLOB:
|
|
return TQVariant::ByteArray;
|
|
case SQLITE_TEXT:
|
|
default:
|
|
return TQVariant::String;
|
|
}
|
|
}
|
|
|
|
static TQSqlError qMakeError(sqlite3 *access, const TQString &descr, TQSqlError::Type type,
|
|
int errorCode = -1)
|
|
{
|
|
return TQSqlError(descr,
|
|
TQString::fromUtf8(sqlite3_errmsg(access)),
|
|
type, errorCode);
|
|
}
|
|
|
|
class TQSQLite3DriverPrivate
|
|
{
|
|
public:
|
|
TQSQLite3DriverPrivate();
|
|
sqlite3 *access;
|
|
bool utf8;
|
|
};
|
|
|
|
TQSQLite3DriverPrivate::TQSQLite3DriverPrivate() : access(0)
|
|
{
|
|
utf8 = true;
|
|
}
|
|
|
|
class TQSQLite3ResultPrivate
|
|
{
|
|
public:
|
|
TQSQLite3ResultPrivate(TQSQLite3Result *res);
|
|
void cleanup();
|
|
bool fetchNext(TQtSqlCachedResult::RowCache *row);
|
|
bool isSelect();
|
|
// initializes the recordInfo and the cache
|
|
void initColumns(TQtSqlCachedResult::RowCache **row = 0);
|
|
void finalize();
|
|
|
|
TQSQLite3Result* q;
|
|
sqlite3 *access;
|
|
|
|
sqlite3_stmt *stmt;
|
|
|
|
uint skippedStatus: 1; // the status of the fetchNext() that's skipped
|
|
TQtSqlCachedResult::RowCache *skipRow;
|
|
|
|
uint utf8: 1;
|
|
TQSqlRecord rInf;
|
|
};
|
|
|
|
static const uint initial_cache_size = 128;
|
|
|
|
TQSQLite3ResultPrivate::TQSQLite3ResultPrivate(TQSQLite3Result* res) : q(res), access(0),
|
|
stmt(0), skippedStatus(false), skipRow(0), utf8(false)
|
|
{
|
|
}
|
|
|
|
void TQSQLite3ResultPrivate::cleanup()
|
|
{
|
|
finalize();
|
|
rInf.clear();
|
|
skippedStatus = false;
|
|
delete skipRow;
|
|
skipRow = 0;
|
|
q->setAt(TQSql::BeforeFirst);
|
|
q->setActive(false);
|
|
q->cleanup();
|
|
}
|
|
|
|
void TQSQLite3ResultPrivate::finalize()
|
|
{
|
|
if (!stmt)
|
|
return;
|
|
|
|
sqlite3_finalize(stmt);
|
|
stmt = 0;
|
|
}
|
|
|
|
// called on first fetch
|
|
void TQSQLite3ResultPrivate::initColumns(TQtSqlCachedResult::RowCache** row)
|
|
{
|
|
rInf.clear();
|
|
|
|
int nCols = sqlite3_column_count(stmt);
|
|
if (nCols <= 0)
|
|
return;
|
|
|
|
q->init(nCols);
|
|
|
|
for (int i = 0; i < nCols; ++i) {
|
|
TQString colName = TQString::fromUtf8(sqlite3_column_name(stmt, i));
|
|
|
|
int dotIdx = colName.findRev('.');
|
|
rInf.append(TQSqlField(colName.mid(dotIdx == -1 ? 0 : dotIdx + 1),
|
|
qSqliteType(sqlite3_column_type(stmt, i))));
|
|
}
|
|
|
|
// skip the first fetch
|
|
if (row && !*row) {
|
|
*row = new TQtSqlCachedResult::RowCache(nCols);
|
|
skipRow = *row;
|
|
}
|
|
}
|
|
|
|
bool TQSQLite3ResultPrivate::fetchNext(TQtSqlCachedResult::RowCache* row)
|
|
{
|
|
int res;
|
|
unsigned int i;
|
|
|
|
if (skipRow) {
|
|
// already fetched
|
|
if (row)
|
|
*row = *skipRow;
|
|
delete skipRow;
|
|
skipRow = 0;
|
|
return skippedStatus;
|
|
}
|
|
|
|
if (!stmt)
|
|
return false;
|
|
|
|
// keep trying while busy, wish I could implement this better.
|
|
while ((res = sqlite3_step(stmt)) == SQLITE_BUSY) {
|
|
// sleep instead requesting result again immidiately.
|
|
#if defined Q_OS_WIN
|
|
Sleep(1000);
|
|
#else
|
|
sleep(1);
|
|
#endif
|
|
}
|
|
|
|
switch(res) {
|
|
case SQLITE_ROW:
|
|
// check to see if should fill out columns
|
|
if (rInf.isEmpty())
|
|
// must be first call.
|
|
initColumns(&row);
|
|
if (!row)
|
|
return true;
|
|
for (i = 0; i < rInf.count(); ++i)
|
|
// todo - handle other types
|
|
(*row)[i] = TQString::fromUtf8((char *)(sqlite3_column_text(stmt, i)));
|
|
// values[i + idx] = utf8 ? TQString::fromUtf8(fvals[i]) : TQString::fromAscii(fvals[i]);
|
|
return true;
|
|
case SQLITE_DONE:
|
|
if (rInf.isEmpty())
|
|
// must be first call.
|
|
initColumns(&row);
|
|
q->setAt(TQSql::AfterLast);
|
|
return false;
|
|
case SQLITE_ERROR:
|
|
case SQLITE_MISUSE:
|
|
default:
|
|
// something wrong, don't get col info, but still return false
|
|
q->setLastError(qMakeError(access, "Unable to fetch row", TQSqlError::Connection, res));
|
|
finalize();
|
|
q->setAt(TQSql::AfterLast);
|
|
return false;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
TQSQLite3Result::TQSQLite3Result(const TQSQLite3Driver* db)
|
|
: TQtSqlCachedResult(db)
|
|
{
|
|
d = new TQSQLite3ResultPrivate(this);
|
|
d->access = db->d->access;
|
|
}
|
|
|
|
TQSQLite3Result::~TQSQLite3Result()
|
|
{
|
|
d->cleanup();
|
|
delete d;
|
|
}
|
|
|
|
/*
|
|
Execute \a query.
|
|
*/
|
|
bool TQSQLite3Result::reset (const TQString &query)
|
|
{
|
|
// this is where we build a query.
|
|
if (!driver() || !driver()->isOpen() || driver()->isOpenError())
|
|
return false;
|
|
|
|
d->cleanup();
|
|
|
|
setSelect(false);
|
|
|
|
int res = sqlite3_prepare(d->access, query.utf8().data(), (query.length() + 1) * sizeof(TQChar),
|
|
&d->stmt, 0);
|
|
|
|
if (res != SQLITE_OK) {
|
|
setLastError(qMakeError(d->access, "Unable to execute statement", TQSqlError::Statement, res));
|
|
d->finalize();
|
|
return false;
|
|
}
|
|
|
|
d->skippedStatus = d->fetchNext(0);
|
|
|
|
setSelect(!d->rInf.isEmpty());
|
|
setActive(true);
|
|
return true;
|
|
}
|
|
|
|
bool TQSQLite3Result::gotoNext(TQtSqlCachedResult::RowCache* row)
|
|
{
|
|
return d->fetchNext(row);
|
|
}
|
|
|
|
int TQSQLite3Result::size()
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
int TQSQLite3Result::numRowsAffected()
|
|
{
|
|
return sqlite3_changes(d->access);
|
|
}
|
|
|
|
/////////////////////////////////////////////////////////
|
|
|
|
TQSQLite3Driver::TQSQLite3Driver(TQObject * parent, const char *name)
|
|
: TQSqlDriver(parent, name)
|
|
{
|
|
d = new TQSQLite3DriverPrivate();
|
|
}
|
|
|
|
TQSQLite3Driver::TQSQLite3Driver(sqlite3 *connection, TQObject *parent, const char *name)
|
|
: TQSqlDriver(parent, name)
|
|
{
|
|
d = new TQSQLite3DriverPrivate();
|
|
d->access = connection;
|
|
setOpen(true);
|
|
setOpenError(false);
|
|
}
|
|
|
|
|
|
TQSQLite3Driver::~TQSQLite3Driver()
|
|
{
|
|
delete d;
|
|
}
|
|
|
|
bool TQSQLite3Driver::hasFeature(DriverFeature f) const
|
|
{
|
|
switch (f) {
|
|
case Transactions:
|
|
case Unicode:
|
|
case BLOB:
|
|
return true;
|
|
default:
|
|
break;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
SQLite dbs have no user name, passwords, hosts or ports.
|
|
just file names.
|
|
*/
|
|
bool TQSQLite3Driver::open(const TQString & db, const TQString &, const TQString &, const TQString &, int, const TQString &)
|
|
{
|
|
if (isOpen())
|
|
close();
|
|
|
|
if (db.isEmpty())
|
|
return false;
|
|
|
|
if (sqlite3_open(TQFile::encodeName(db), &d->access) == SQLITE_OK) {
|
|
setOpen(true);
|
|
setOpenError(false);
|
|
return true;
|
|
} else {
|
|
setLastError(qMakeError(d->access, "Error opening database",
|
|
TQSqlError::Connection));
|
|
setOpenError(true);
|
|
return false;
|
|
}
|
|
}
|
|
|
|
void TQSQLite3Driver::close()
|
|
{
|
|
if (isOpen()) {
|
|
if (sqlite3_close(d->access) != SQLITE_OK)
|
|
setLastError(qMakeError(d->access, "Error closing database",
|
|
TQSqlError::Connection));
|
|
d->access = 0;
|
|
setOpen(false);
|
|
setOpenError(false);
|
|
}
|
|
}
|
|
|
|
bool TQSQLite3Driver::ping()
|
|
{
|
|
if ( !isOpen() ) {
|
|
return FALSE;
|
|
}
|
|
|
|
// FIXME
|
|
// Implement ping if available
|
|
return TRUE;
|
|
}
|
|
|
|
TQSqlQuery TQSQLite3Driver::createQuery() const
|
|
{
|
|
return TQSqlQuery(new TQSQLite3Result(this));
|
|
}
|
|
|
|
bool TQSQLite3Driver::beginTransaction()
|
|
{
|
|
if (!isOpen() || isOpenError())
|
|
return false;
|
|
|
|
TQSqlQuery q(createQuery());
|
|
if (!q.exec("BEGIN")) {
|
|
setLastError(TQSqlError("Unable to begin transaction",
|
|
q.lastError().databaseText(), TQSqlError::Transaction));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool TQSQLite3Driver::commitTransaction()
|
|
{
|
|
if (!isOpen() || isOpenError())
|
|
return false;
|
|
|
|
TQSqlQuery q(createQuery());
|
|
if (!q.exec("COMMIT")) {
|
|
setLastError(TQSqlError("Unable to begin transaction",
|
|
q.lastError().databaseText(), TQSqlError::Transaction));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
bool TQSQLite3Driver::rollbackTransaction()
|
|
{
|
|
if (!isOpen() || isOpenError())
|
|
return false;
|
|
|
|
TQSqlQuery q(createQuery());
|
|
if (!q.exec("ROLLBACK")) {
|
|
setLastError(TQSqlError("Unable to begin transaction",
|
|
q.lastError().databaseText(), TQSqlError::Transaction));
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
TQStringList TQSQLite3Driver::tables(const TQString &typeName) const
|
|
{
|
|
TQStringList res;
|
|
if (!isOpen())
|
|
return res;
|
|
int type = typeName.toInt();
|
|
|
|
TQSqlQuery q = createQuery();
|
|
q.setForwardOnly(TRUE);
|
|
#if (TQT_VERSION-0 >= 0x030200)
|
|
if ((type & (int)TQSql::Tables) && (type & (int)TQSql::Views))
|
|
q.exec("SELECT name FROM sqlite_master WHERE type='table' OR type='view'");
|
|
else if (typeName.isEmpty() || (type & (int)TQSql::Tables))
|
|
q.exec("SELECT name FROM sqlite_master WHERE type='table'");
|
|
else if (type & (int)TQSql::Views)
|
|
q.exec("SELECT name FROM sqlite_master WHERE type='view'");
|
|
#else
|
|
q.exec("SELECT name FROM sqlite_master WHERE type='table' OR type='view'");
|
|
#endif
|
|
|
|
|
|
if (q.isActive()) {
|
|
while(q.next())
|
|
res.append(q.value(0).toString());
|
|
}
|
|
|
|
#if (TQT_VERSION-0 >= 0x030200)
|
|
if (type & (int)TQSql::SystemTables) {
|
|
// there are no internal tables beside this one:
|
|
res.append("sqlite_master");
|
|
}
|
|
#endif
|
|
|
|
return res;
|
|
}
|
|
|
|
TQSqlIndex TQSQLite3Driver::primaryIndex(const TQString &tblname) const
|
|
{
|
|
TQSqlRecordInfo rec(recordInfo(tblname)); // expensive :(
|
|
|
|
if (!isOpen())
|
|
return TQSqlIndex();
|
|
|
|
TQSqlQuery q = createQuery();
|
|
q.setForwardOnly(TRUE);
|
|
// finrst find a UNIQUE INDEX
|
|
q.exec("PRAGMA index_list('" + tblname + "');");
|
|
TQString indexname;
|
|
while(q.next()) {
|
|
if (q.value(2).toInt()==1) {
|
|
indexname = q.value(1).toString();
|
|
break;
|
|
}
|
|
}
|
|
if (indexname.isEmpty())
|
|
return TQSqlIndex();
|
|
|
|
q.exec("PRAGMA index_info('" + indexname + "');");
|
|
|
|
TQSqlIndex index(indexname);
|
|
while(q.next()) {
|
|
TQString name = q.value(2).toString();
|
|
TQSqlVariant::Type type = TQSqlVariant::Invalid;
|
|
if (rec.contains(name))
|
|
type = rec.find(name).type();
|
|
index.append(TQSqlField(name, type));
|
|
}
|
|
return index;
|
|
}
|
|
|
|
TQSqlRecordInfo TQSQLite3Driver::recordInfo(const TQString &tbl) const
|
|
{
|
|
if (!isOpen())
|
|
return TQSqlRecordInfo();
|
|
|
|
TQSqlQuery q = createQuery();
|
|
q.setForwardOnly(TRUE);
|
|
q.exec("SELECT * FROM " + tbl + " LIMIT 1");
|
|
return recordInfo(q);
|
|
}
|
|
|
|
TQSqlRecord TQSQLite3Driver::record(const TQString &tblname) const
|
|
{
|
|
if (!isOpen())
|
|
return TQSqlRecord();
|
|
|
|
return recordInfo(tblname).toRecord();
|
|
}
|
|
|
|
TQSqlRecord TQSQLite3Driver::record(const TQSqlQuery& query) const
|
|
{
|
|
if (query.isActive() && query.driver() == this) {
|
|
TQSQLite3Result* result = (TQSQLite3Result*)query.result();
|
|
return result->d->rInf;
|
|
}
|
|
return TQSqlRecord();
|
|
}
|
|
|
|
TQSqlRecordInfo TQSQLite3Driver::recordInfo(const TQSqlQuery& query) const
|
|
{
|
|
if (query.isActive() && query.driver() == this) {
|
|
TQSQLite3Result* result = (TQSQLite3Result*)query.result();
|
|
return TQSqlRecordInfo(result->d->rInf);
|
|
}
|
|
return TQSqlRecordInfo();
|
|
}
|