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Cleanup of the database, better chunking, better matching.

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This commit is contained in:
Adam Treat 2023-05-20 14:29:30 -04:00 committed by AT
parent 5f533e76a1
commit 54fc980cb5
2 changed files with 155 additions and 22 deletions
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175
gpt4all-chat/localdocs.cpp
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@ -113,20 +113,20 @@ QStringList generateGrams(const QString &input, int N)
for (int i = 0; i < words.size() - (N - 1); ++i) {
QStringList currentNgram;
for (int j = 0; j < N; ++j) {
currentNgram.append(words[i + j]);
currentNgram.append("\"" + words[i + j] + "\"");
}
ngrams.append("\"" + currentNgram.join(" ") + "\"");
ngrams.append("NEAR(" + currentNgram.join(" ") + ", " + QString::number(N) + ")");
}
return ngrams;
}
bool selectChunk(QSqlQuery &q, const QList<QString> &collection_names, const QString &chunk_text)
{
for (int N = 5; N > 1; N--) {
const int N_WORDS = chunk_text.split(QRegularExpression("\\s+")).size();
for (int N = N_WORDS; N > 2; N--) {
// first try trigrams
QList<QString> text = generateGrams(chunk_text, N);
QString orText = text.join(" OR ");
qDebug() << "before" << chunk_text << "after" << orText;
const QString collection_names_str = collection_names.join("', '");
const QString formatted_query = SELECT_SQL.arg("'" + collection_names_str + "'");
if (!q.prepare(formatted_query))
@ -135,6 +135,9 @@ bool selectChunk(QSqlQuery &q, const QList<QString> &collection_names, const QSt
bool success = q.exec();
if (!success) return false;
if (q.next()) {
#if defined(DEBUG)
qDebug() << "hit on" << N << "before" << chunk_text << "after" << orText;
#endif
q.previous();
return true;
}
@ -175,6 +178,10 @@ const auto SELECT_COLLECTIONS_FROM_FOLDER_SQL = QLatin1String(R"(
select collection_name from collections where folder_id = ?;
)");
const auto SELECT_COLLECTIONS_SQL = QLatin1String(R"(
select collection_name, folder_id from collections;
)");
bool addCollection(QSqlQuery &q, const QString &collection_name, int folder_id)
{
if (!q.prepare(INSERT_COLLECTION_SQL))
@ -215,6 +222,16 @@ bool selectCollectionsFromFolder(QSqlQuery &q, int folder_id, QList<QString> *co
return true;
}
bool selectAllFromCollections(QSqlQuery &q, QList<QPair<QString, int>> *collections) {
if (!q.prepare(SELECT_COLLECTIONS_SQL))
return false;
if (!q.exec())
return false;
while (q.next())
collections->append(qMakePair(q.value(0).toString(), q.value(1).toInt()));
return true;
}
const auto INSERT_FOLDERS_SQL = QLatin1String(R"(
insert into folders(folder_path) values(?);
)");
@ -223,10 +240,14 @@ const auto DELETE_FOLDERS_SQL = QLatin1String(R"(
delete from folders where id = ?;
)");
const auto SELECT_FOLDERS_SQL = QLatin1String(R"(
const auto SELECT_FOLDERS_FROM_PATH_SQL = QLatin1String(R"(
select id from folders where folder_path = ?;
)");
const auto SELECT_FOLDERS_FROM_ID_SQL = QLatin1String(R"(
select folder_path from folders where id = ?;
)");
const auto FOLDERS_SQL = QLatin1String(R"(
create table folders(id integer primary key, folder_path varchar unique);
)");
@ -250,7 +271,7 @@ bool removeFolderFromDB(QSqlQuery &q, int folder_id) {
}
bool selectFolder(QSqlQuery &q, const QString &folder_path, int *id) {
if (!q.prepare(SELECT_FOLDERS_SQL))
if (!q.prepare(SELECT_FOLDERS_FROM_PATH_SQL))
return false;
q.addBindValue(folder_path);
if (!q.exec())
@ -261,6 +282,18 @@ bool selectFolder(QSqlQuery &q, const QString &folder_path, int *id) {
return true;
}
bool selectFolder(QSqlQuery &q, int id, QString *folder_path) {
if (!q.prepare(SELECT_FOLDERS_FROM_ID_SQL))
return false;
q.addBindValue(id);
if (!q.exec())
return false;
Q_ASSERT(q.size() < 2);
if (q.next())
*folder_path = q.value(0).toString();
return true;
}
const auto INSERT_DOCUMENTS_SQL = QLatin1String(R"(
insert into documents(folder_id, document_time, document_path) values(?, ?, ?);
)");
@ -285,6 +318,10 @@ const auto SELECT_DOCUMENTS_SQL = QLatin1String(R"(
select id from documents where folder_id = ?;
)");
const auto SELECT_ALL_DOCUMENTS_SQL = QLatin1String(R"(
select id, document_path from documents;
)");
bool addDocument(QSqlQuery &q, int folder_id, qint64 document_time, const QString &document_path, int *document_id)
{
if (!q.prepare(INSERT_DOCUMENTS_SQL))
@ -441,22 +478,30 @@ void Database::handleDocumentErrorAndScheduleNext(const QString &errorMessage,
void Database::chunkStream(QTextStream &stream, int document_id)
{
QString text = stream.readAll();
int chunkSize = 256;
int overlap = 25;
const int chunkSize = 256;
int chunk_id = 0;
int charCount = 0;
QList<QString> words;
for (int i = 0; i + chunkSize < text.length(); i += (chunkSize - overlap)) {
QString chunk = text.mid(i, chunkSize);
QSqlQuery q;
if (!addChunk(q,
document_id,
++chunk_id,
chunk,
0 /*embedding_id*/,
QString() /*embedding_path*/
)) {
qWarning() << "ERROR: Could not insert chunk into db" << q.lastError();
while (!stream.atEnd()) {
QString word;
stream >> word;
charCount += word.length();
words.append(word);
if (charCount + words.size() - 1 >= chunkSize || stream.atEnd()) {
const QString chunk = words.join(" ");
QSqlQuery q;
if (!addChunk(q,
document_id,
++chunk_id,
chunk,
0 /*embedding_id*/,
QString() /*embedding_path*/
)) {
qWarning() << "ERROR: Could not insert chunk into db" << q.lastError();
}
words.clear();
charCount = 0;
}
}
}
@ -466,7 +511,18 @@ void Database::scanQueue()
if (m_docsToScan.isEmpty())
return;
const DocumentInfo info = m_docsToScan.dequeue();
DocumentInfo info = m_docsToScan.dequeue();
// Update info
info.doc.stat();
// If the doc has since been deleted or no longer readable, then we schedule more work and return
// leaving the cleanup for the cleanup handler
if (!info.doc.exists() || !info.doc.isReadable()) {
if (!m_docsToScan.isEmpty()) QTimer::singleShot(0, this, &Database::scanQueue);
return;
}
const int folder_id = info.folder;
const qint64 document_time = info.doc.fileTime(QFile::FileModificationTime).toMSecsSinceEpoch();
const QString document_path = info.doc.canonicalFilePath();
@ -565,7 +621,6 @@ void Database::scanDocuments(int folder_id, const QString &folder_path)
while (it.hasNext()) {
it.next();
QFileInfo fileInfo = it.fileInfo();
fileInfo.setCaching(false);
if (fileInfo.isDir()) {
addFolderToWatch(fileInfo.canonicalFilePath());
continue;
@ -663,7 +718,13 @@ void Database::removeFolder(const QString &collection, const QString &path)
return;
}
removeFolderInternal(collection, folder_id, path);
}
void Database::removeFolderInternal(const QString &collection, int folder_id, const QString &path)
{
// Determine if the folder is used by more than one collection
QSqlQuery q;
QList<QString> collections;
if (!selectCollectionsFromFolder(q, folder_id, &collections)) {
qWarning() << "ERROR: Cannot select collections from folder" << folder_id << q.lastError();
@ -771,6 +832,73 @@ void Database::retrieveFromDB(const QList<QString> &collections, const QString &
emit retrieveResult(results);
}
void Database::cleanDB()
{
#if defined(DEBUG)
qDebug() << "cleanDB";
#endif
// Scan all folders in db to make sure they still exist
QSqlQuery q;
QList<QPair<QString, int>> collections;
if (!selectAllFromCollections(q, &collections)) {
qWarning() << "ERROR: Cannot select collections" << q.lastError();
return;
}
for (auto pair : collections) {
// Find the path for the folder
QString collection = pair.first;
int folder_id = pair.second;
QString folder_path;
if (!selectFolder(q, folder_id, &folder_path)) {
qWarning() << "ERROR: Cannot select folder from id" << folder_id << q.lastError();
return;
}
QFileInfo info(folder_path);
if (!info.exists() || !info.isReadable()) {
#if defined(DEBUG)
qDebug() << "clean db removing folder" << folder_id << folder_path;
#endif
removeFolderInternal(collection, folder_id, folder_path);
}
}
// Scan all documents in db to make sure they still exist
if (!q.prepare(SELECT_ALL_DOCUMENTS_SQL)) {
qWarning() << "ERROR: Cannot prepare sql for select all documents" << q.lastError();
return;
}
if (!q.exec()) {
qWarning() << "ERROR: Cannot exec sql for select all documents" << q.lastError();
return;
}
while (q.next()) {
int document_id = q.value(0).toInt();
QString document_path = q.value(1).toString();
QFileInfo info(document_path);
if (info.exists() && info.isReadable())
continue;
#if defined(DEBUG)
qDebug() << "clean db removing document" << document_id << document_path;
#endif
// Remove all chunks and documents that either don't exist or have become unreadable
QSqlQuery query;
if (!removeChunksByDocumentId(query, document_id)) {
qWarning() << "ERROR: Cannot remove chunks of document_id" << document_id << query.lastError();
}
if (!removeDocument(query, document_id)) {
qWarning() << "ERROR: Cannot remove document_id" << document_id << query.lastError();
}
}
}
void Database::directoryChanged(const QString &path)
{
#if defined(DEBUG)
@ -794,6 +922,9 @@ void Database::directoryChanged(const QString &path)
return;
}
// Clean the database
cleanDB();
// Rescan the documents associated with the folder
scanDocuments(folder_id, path);
}

2
gpt4all-chat/localdocs.h
View File

@ -26,6 +26,7 @@ public Q_SLOTS:
void addFolder(const QString &collection, const QString &path);
void removeFolder(const QString &collection, const QString &path);
void retrieveFromDB(const QList<QString> &collections, const QString &text);
void cleanDB();
Q_SIGNALS:
void docsToScanChanged();
@ -38,6 +39,7 @@ private Q_SLOTS:
bool removeFolderFromWatch(const QString &path);
private:
void removeFolderInternal(const QString &collection, int folder_id, const QString &path);
void chunkStream(QTextStream &stream, int document_id);
void handleDocumentErrorAndScheduleNext(const QString &errorMessage,
int document_id, const QString &document_path, const QSqlError &error);