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author | Grail Finder <wohilas@gmail.com> | 2025-10-19 13:14:56 +0300 |
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committer | Grail Finder <wohilas@gmail.com> | 2025-10-19 13:14:56 +0300 |
commit | 60ccaed2009c535c9c92c163995577fcde7aadb6 (patch) | |
tree | 4621fdbcd4b86cc32c7c05ff13b907136424f765 /rag_new/storage.go | |
parent | dfa164e871a62f814aeeb9ced6350e74a52f65b3 (diff) |
Chore: remove old rag
Diffstat (limited to 'rag_new/storage.go')
-rw-r--r-- | rag_new/storage.go | 300 |
1 files changed, 0 insertions, 300 deletions
diff --git a/rag_new/storage.go b/rag_new/storage.go deleted file mode 100644 index 2ab56fb..0000000 --- a/rag_new/storage.go +++ /dev/null @@ -1,300 +0,0 @@ -package rag_new - -import ( - "gf-lt/models" - "gf-lt/storage" - "encoding/binary" - "fmt" - "log/slog" - "sort" - "strings" - "unsafe" - - "github.com/jmoiron/sqlx" -) - -// VectorStorage handles storing and retrieving vectors from SQLite -type VectorStorage struct { - logger *slog.Logger - sqlxDB *sqlx.DB - store storage.FullRepo -} - -func NewVectorStorage(logger *slog.Logger, store storage.FullRepo) *VectorStorage { - return &VectorStorage{ - logger: logger, - sqlxDB: store.DB(), // Use the new DB() method - store: store, - } -} - -// CreateTables creates the necessary tables for vector storage -func (vs *VectorStorage) CreateTables() error { - // Create tables for different embedding dimensions - queries := []string{ - `CREATE TABLE IF NOT EXISTS embeddings_384 ( - id INTEGER PRIMARY KEY AUTOINCREMENT, - embeddings BLOB NOT NULL, - slug TEXT NOT NULL, - raw_text TEXT NOT NULL, - filename TEXT NOT NULL, - created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP - )`, - `CREATE TABLE IF NOT EXISTS embeddings_5120 ( - id INTEGER PRIMARY KEY AUTOINCREMENT, - embeddings BLOB NOT NULL, - slug TEXT NOT NULL, - raw_text TEXT NOT NULL, - filename TEXT NOT NULL, - created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP - )`, - // Indexes for better performance - `CREATE INDEX IF NOT EXISTS idx_embeddings_384_filename ON embeddings_384(filename)`, - `CREATE INDEX IF NOT EXISTS idx_embeddings_5120_filename ON embeddings_5120(filename)`, - `CREATE INDEX IF NOT EXISTS idx_embeddings_384_slug ON embeddings_384(slug)`, - `CREATE INDEX IF NOT EXISTS idx_embeddings_5120_slug ON embeddings_5120(slug)`, - - // Additional indexes that may help with searches - `CREATE INDEX IF NOT EXISTS idx_embeddings_384_created_at ON embeddings_384(created_at)`, - `CREATE INDEX IF NOT EXISTS idx_embeddings_5120_created_at ON embeddings_5120(created_at)`, - } - - for _, query := range queries { - if _, err := vs.sqlxDB.Exec(query); err != nil { - return fmt.Errorf("failed to create table: %w", err) - } - } - return nil -} - -// SerializeVector converts []float32 to binary blob -func SerializeVector(vec []float32) []byte { - buf := make([]byte, len(vec)*4) // 4 bytes per float32 - for i, v := range vec { - binary.LittleEndian.PutUint32(buf[i*4:], mathFloat32bits(v)) - } - return buf -} - -// DeserializeVector converts binary blob back to []float32 -func DeserializeVector(data []byte) []float32 { - count := len(data) / 4 - vec := make([]float32, count) - for i := 0; i < count; i++ { - vec[i] = mathBitsToFloat32(binary.LittleEndian.Uint32(data[i*4:])) - } - return vec -} - -// mathFloat32bits and mathBitsToFloat32 are helpers to convert between float32 and uint32 -func mathFloat32bits(f float32) uint32 { - return binary.LittleEndian.Uint32((*(*[4]byte)(unsafe.Pointer(&f)))[:4]) -} - -func mathBitsToFloat32(b uint32) float32 { - return *(*float32)(unsafe.Pointer(&b)) -} - -// WriteVector stores an embedding vector in the database -func (vs *VectorStorage) WriteVector(row *models.VectorRow) error { - tableName, err := vs.getTableName(row.Embeddings) - if err != nil { - return err - } - - // Serialize the embeddings to binary - serializedEmbeddings := SerializeVector(row.Embeddings) - - query := fmt.Sprintf( - "INSERT INTO %s (embeddings, slug, raw_text, filename) VALUES (?, ?, ?, ?)", - tableName, - ) - - if _, err := vs.sqlxDB.Exec(query, serializedEmbeddings, row.Slug, row.RawText, row.FileName); err != nil { - vs.logger.Error("failed to write vector", "error", err, "slug", row.Slug) - return err - } - - return nil -} - -// getTableName determines which table to use based on embedding size -func (vs *VectorStorage) getTableName(emb []float32) (string, error) { - switch len(emb) { - case 384: - return "embeddings_384", nil - case 5120: - return "embeddings_5120", nil - default: - return "", fmt.Errorf("no table for embedding size of %d", len(emb)) - } -} - -// SearchClosest finds vectors closest to the query vector using efficient cosine similarity calculation -func (vs *VectorStorage) SearchClosest(query []float32) ([]models.VectorRow, error) { - tableName, err := vs.getTableName(query) - if err != nil { - return nil, err - } - - // For better performance, instead of loading all vectors at once, - // we'll implement batching and potentially add L2 distance-based pre-filtering - // since cosine similarity is related to L2 distance for normalized vectors - - querySQL := fmt.Sprintf("SELECT embeddings, slug, raw_text, filename FROM %s", tableName) - rows, err := vs.sqlxDB.Query(querySQL) - if err != nil { - return nil, err - } - defer rows.Close() - - // Use a min-heap or simple slice to keep track of top 3 closest vectors - type SearchResult struct { - vector models.VectorRow - distance float32 - } - - var topResults []SearchResult - - // Process vectors one by one to avoid loading everything into memory - for rows.Next() { - var ( - embeddingsBlob []byte - slug, rawText, fileName string - ) - - if err := rows.Scan(&embeddingsBlob, &slug, &rawText, &fileName); err != nil { - vs.logger.Error("failed to scan row", "error", err) - continue - } - - storedEmbeddings := DeserializeVector(embeddingsBlob) - - // Calculate cosine similarity (returns value between -1 and 1, where 1 is most similar) - similarity := cosineSimilarity(query, storedEmbeddings) - distance := 1 - similarity // Convert to distance where 0 is most similar - - result := SearchResult{ - vector: models.VectorRow{ - Embeddings: storedEmbeddings, - Slug: slug, - RawText: rawText, - FileName: fileName, - }, - distance: distance, - } - - // Add to top results and maintain only top 3 - topResults = append(topResults, result) - - // Sort and keep only top 3 - sort.Slice(topResults, func(i, j int) bool { - return topResults[i].distance < topResults[j].distance - }) - - if len(topResults) > 3 { - topResults = topResults[:3] // Keep only closest 3 - } - } - - // Convert back to VectorRow slice - var results []models.VectorRow - for _, result := range topResults { - result.vector.Distance = result.distance - results = append(results, result.vector) - } - - return results, nil -} - -// ListFiles returns a list of all loaded files -func (vs *VectorStorage) ListFiles() ([]string, error) { - var fileLists [][]string - - // Query both tables and combine results - for _, table := range []string{"embeddings_384", "embeddings_5120"} { - query := fmt.Sprintf("SELECT DISTINCT filename FROM %s", table) - rows, err := vs.sqlxDB.Query(query) - if err != nil { - // Continue if one table doesn't exist - continue - } - - var files []string - for rows.Next() { - var filename string - if err := rows.Scan(&filename); err != nil { - continue - } - files = append(files, filename) - } - rows.Close() - - fileLists = append(fileLists, files) - } - - // Combine and deduplicate - fileSet := make(map[string]bool) - var allFiles []string - for _, files := range fileLists { - for _, file := range files { - if !fileSet[file] { - fileSet[file] = true - allFiles = append(allFiles, file) - } - } - } - - return allFiles, nil -} - -// RemoveEmbByFileName removes all embeddings associated with a specific filename -func (vs *VectorStorage) RemoveEmbByFileName(filename string) error { - var errors []string - - for _, table := range []string{"embeddings_384", "embeddings_5120"} { - query := fmt.Sprintf("DELETE FROM %s WHERE filename = ?", table) - if _, err := vs.sqlxDB.Exec(query, filename); err != nil { - errors = append(errors, err.Error()) - } - } - - if len(errors) > 0 { - return fmt.Errorf("errors occurred: %s", strings.Join(errors, "; ")) - } - - return nil -} - -// cosineSimilarity calculates the cosine similarity between two vectors -func cosineSimilarity(a, b []float32) float32 { - if len(a) != len(b) { - return 0.0 - } - - var dotProduct, normA, normB float32 - for i := 0; i < len(a); i++ { - dotProduct += a[i] * b[i] - normA += a[i] * a[i] - normB += b[i] * b[i] - } - - if normA == 0 || normB == 0 { - return 0.0 - } - - return dotProduct / (sqrt(normA) * sqrt(normB)) -} - -// sqrt returns the square root of a float32 -func sqrt(f float32) float32 { - // A simple implementation of square root using Newton's method - if f == 0 { - return 0 - } - guess := f / 2 - for i := 0; i < 10; i++ { // 10 iterations should be enough for good precision - guess = (guess + f/guess) / 2 - } - return guess -}
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