747 lines
21 KiB
TypeScript
747 lines
21 KiB
TypeScript
/**
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* Database Queries
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*
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* Prepared statements for CRUD operations on the knowledge graph.
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*/
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import Database from 'better-sqlite3';
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import {
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Node,
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Edge,
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FileRecord,
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UnresolvedReference,
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NodeKind,
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EdgeKind,
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Language,
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GraphStats,
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SearchOptions,
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SearchResult,
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} from '../types';
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/**
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* Database row types (snake_case from SQLite)
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*/
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interface NodeRow {
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id: string;
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kind: string;
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name: string;
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qualified_name: string;
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file_path: string;
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language: string;
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start_line: number;
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end_line: number;
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start_column: number;
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end_column: number;
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docstring: string | null;
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signature: string | null;
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visibility: string | null;
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is_exported: number;
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is_async: number;
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is_static: number;
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is_abstract: number;
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decorators: string | null;
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type_parameters: string | null;
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updated_at: number;
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}
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interface EdgeRow {
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id: number;
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source: string;
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target: string;
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kind: string;
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metadata: string | null;
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line: number | null;
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col: number | null;
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}
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interface FileRow {
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path: string;
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content_hash: string;
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language: string;
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size: number;
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modified_at: number;
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indexed_at: number;
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node_count: number;
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errors: string | null;
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}
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interface UnresolvedRefRow {
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id: number;
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from_node_id: string;
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reference_name: string;
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reference_kind: string;
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line: number;
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col: number;
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candidates: string | null;
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}
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/**
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* Convert database row to Node object
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*/
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function rowToNode(row: NodeRow): Node {
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return {
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id: row.id,
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kind: row.kind as NodeKind,
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name: row.name,
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qualifiedName: row.qualified_name,
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filePath: row.file_path,
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language: row.language as Language,
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startLine: row.start_line,
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endLine: row.end_line,
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startColumn: row.start_column,
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endColumn: row.end_column,
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docstring: row.docstring ?? undefined,
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signature: row.signature ?? undefined,
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visibility: row.visibility as Node['visibility'],
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isExported: row.is_exported === 1,
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isAsync: row.is_async === 1,
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isStatic: row.is_static === 1,
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isAbstract: row.is_abstract === 1,
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decorators: row.decorators ? JSON.parse(row.decorators) : undefined,
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typeParameters: row.type_parameters ? JSON.parse(row.type_parameters) : undefined,
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updatedAt: row.updated_at,
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};
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}
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/**
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* Convert database row to Edge object
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*/
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function rowToEdge(row: EdgeRow): Edge {
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return {
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source: row.source,
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target: row.target,
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kind: row.kind as EdgeKind,
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metadata: row.metadata ? JSON.parse(row.metadata) : undefined,
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line: row.line ?? undefined,
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column: row.col ?? undefined,
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};
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}
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/**
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* Convert database row to FileRecord object
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*/
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function rowToFileRecord(row: FileRow): FileRecord {
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return {
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path: row.path,
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contentHash: row.content_hash,
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language: row.language as Language,
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size: row.size,
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modifiedAt: row.modified_at,
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indexedAt: row.indexed_at,
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nodeCount: row.node_count,
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errors: row.errors ? JSON.parse(row.errors) : undefined,
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};
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}
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/**
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* Query builder for the knowledge graph database
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*/
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export class QueryBuilder {
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private db: Database.Database;
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// Node cache for frequently accessed nodes (LRU-style, max 1000 entries)
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private nodeCache: Map<string, Node> = new Map();
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private readonly maxCacheSize = 1000;
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// Prepared statements (lazily initialized)
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private stmts: {
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insertNode?: Database.Statement;
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updateNode?: Database.Statement;
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deleteNode?: Database.Statement;
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deleteNodesByFile?: Database.Statement;
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getNodeById?: Database.Statement;
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getNodesByFile?: Database.Statement;
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getNodesByKind?: Database.Statement;
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insertEdge?: Database.Statement;
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upsertFile?: Database.Statement;
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deleteEdgesBySource?: Database.Statement;
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deleteEdgesByTarget?: Database.Statement;
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getEdgesBySource?: Database.Statement;
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getEdgesByTarget?: Database.Statement;
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insertFile?: Database.Statement;
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updateFile?: Database.Statement;
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deleteFile?: Database.Statement;
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getFileByPath?: Database.Statement;
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getAllFiles?: Database.Statement;
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insertUnresolved?: Database.Statement;
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deleteUnresolvedByNode?: Database.Statement;
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getUnresolvedByName?: Database.Statement;
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} = {};
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constructor(db: Database.Database) {
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this.db = db;
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}
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// ===========================================================================
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// Node Operations
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// ===========================================================================
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/**
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* Insert a new node
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*/
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insertNode(node: Node): void {
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if (!this.stmts.insertNode) {
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this.stmts.insertNode = this.db.prepare(`
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INSERT INTO nodes (
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id, kind, name, qualified_name, file_path, language,
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start_line, end_line, start_column, end_column,
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docstring, signature, visibility,
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is_exported, is_async, is_static, is_abstract,
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decorators, type_parameters, updated_at
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) VALUES (
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@id, @kind, @name, @qualifiedName, @filePath, @language,
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@startLine, @endLine, @startColumn, @endColumn,
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@docstring, @signature, @visibility,
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@isExported, @isAsync, @isStatic, @isAbstract,
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@decorators, @typeParameters, @updatedAt
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)
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`);
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}
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this.stmts.insertNode.run({
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id: node.id,
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kind: node.kind,
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name: node.name,
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qualifiedName: node.qualifiedName,
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filePath: node.filePath,
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language: node.language,
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startLine: node.startLine,
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endLine: node.endLine,
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startColumn: node.startColumn,
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endColumn: node.endColumn,
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docstring: node.docstring ?? null,
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signature: node.signature ?? null,
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visibility: node.visibility ?? null,
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isExported: node.isExported ? 1 : 0,
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isAsync: node.isAsync ? 1 : 0,
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isStatic: node.isStatic ? 1 : 0,
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isAbstract: node.isAbstract ? 1 : 0,
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decorators: node.decorators ? JSON.stringify(node.decorators) : null,
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typeParameters: node.typeParameters ? JSON.stringify(node.typeParameters) : null,
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updatedAt: node.updatedAt,
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});
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}
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/**
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* Insert multiple nodes in a transaction
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*/
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insertNodes(nodes: Node[]): void {
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this.db.transaction(() => {
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for (const node of nodes) {
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this.insertNode(node);
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}
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})();
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}
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/**
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* Update an existing node
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*/
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updateNode(node: Node): void {
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if (!this.stmts.updateNode) {
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this.stmts.updateNode = this.db.prepare(`
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UPDATE nodes SET
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kind = @kind,
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name = @name,
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qualified_name = @qualifiedName,
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file_path = @filePath,
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language = @language,
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start_line = @startLine,
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end_line = @endLine,
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start_column = @startColumn,
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end_column = @endColumn,
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docstring = @docstring,
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signature = @signature,
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visibility = @visibility,
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is_exported = @isExported,
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is_async = @isAsync,
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is_static = @isStatic,
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is_abstract = @isAbstract,
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decorators = @decorators,
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type_parameters = @typeParameters,
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updated_at = @updatedAt
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WHERE id = @id
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`);
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}
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// Invalidate cache before update
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this.nodeCache.delete(node.id);
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this.stmts.updateNode.run({
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id: node.id,
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kind: node.kind,
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name: node.name,
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qualifiedName: node.qualifiedName,
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filePath: node.filePath,
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language: node.language,
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startLine: node.startLine,
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endLine: node.endLine,
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startColumn: node.startColumn,
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endColumn: node.endColumn,
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docstring: node.docstring ?? null,
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signature: node.signature ?? null,
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visibility: node.visibility ?? null,
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isExported: node.isExported ? 1 : 0,
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isAsync: node.isAsync ? 1 : 0,
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isStatic: node.isStatic ? 1 : 0,
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isAbstract: node.isAbstract ? 1 : 0,
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decorators: node.decorators ? JSON.stringify(node.decorators) : null,
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typeParameters: node.typeParameters ? JSON.stringify(node.typeParameters) : null,
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updatedAt: node.updatedAt,
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});
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}
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/**
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* Delete a node by ID
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*/
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deleteNode(id: string): void {
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if (!this.stmts.deleteNode) {
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this.stmts.deleteNode = this.db.prepare('DELETE FROM nodes WHERE id = ?');
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}
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// Invalidate cache
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this.nodeCache.delete(id);
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this.stmts.deleteNode.run(id);
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}
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/**
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* Delete all nodes for a file
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*/
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deleteNodesByFile(filePath: string): void {
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if (!this.stmts.deleteNodesByFile) {
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this.stmts.deleteNodesByFile = this.db.prepare('DELETE FROM nodes WHERE file_path = ?');
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}
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// Invalidate cache for nodes in this file
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for (const [id, node] of this.nodeCache) {
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if (node.filePath === filePath) {
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this.nodeCache.delete(id);
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}
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}
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this.stmts.deleteNodesByFile.run(filePath);
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}
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/**
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* Get a node by ID
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*/
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getNodeById(id: string): Node | null {
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// Check cache first
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if (this.nodeCache.has(id)) {
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const cached = this.nodeCache.get(id)!;
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// Move to end to implement LRU (delete and re-add)
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this.nodeCache.delete(id);
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this.nodeCache.set(id, cached);
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return cached;
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}
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if (!this.stmts.getNodeById) {
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this.stmts.getNodeById = this.db.prepare('SELECT * FROM nodes WHERE id = ?');
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}
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const row = this.stmts.getNodeById.get(id) as NodeRow | undefined;
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if (!row) {
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return null;
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}
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const node = rowToNode(row);
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this.cacheNode(node);
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return node;
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}
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/**
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* Add a node to the cache, evicting oldest if needed
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*/
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private cacheNode(node: Node): void {
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if (this.nodeCache.size >= this.maxCacheSize) {
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// Evict oldest (first) entry
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const firstKey = this.nodeCache.keys().next().value;
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if (firstKey) {
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this.nodeCache.delete(firstKey);
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}
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}
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this.nodeCache.set(node.id, node);
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}
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/**
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* Clear the node cache
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*/
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clearCache(): void {
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this.nodeCache.clear();
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}
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/**
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* Get all nodes in a file
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*/
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getNodesByFile(filePath: string): Node[] {
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if (!this.stmts.getNodesByFile) {
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this.stmts.getNodesByFile = this.db.prepare(
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'SELECT * FROM nodes WHERE file_path = ? ORDER BY start_line'
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);
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}
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const rows = this.stmts.getNodesByFile.all(filePath) as NodeRow[];
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return rows.map(rowToNode);
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}
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/**
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* Get all nodes of a specific kind
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*/
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getNodesByKind(kind: NodeKind): Node[] {
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if (!this.stmts.getNodesByKind) {
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this.stmts.getNodesByKind = this.db.prepare('SELECT * FROM nodes WHERE kind = ?');
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}
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const rows = this.stmts.getNodesByKind.all(kind) as NodeRow[];
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return rows.map(rowToNode);
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}
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/**
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* Search nodes by name using FTS
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*/
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searchNodes(query: string, options: SearchOptions = {}): SearchResult[] {
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const { kinds, languages, limit = 100, offset = 0 } = options;
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let sql = `
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SELECT nodes.*, bm25(nodes_fts) as score
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FROM nodes_fts
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JOIN nodes ON nodes_fts.id = nodes.id
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WHERE nodes_fts MATCH ?
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`;
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const params: (string | number)[] = [query];
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if (kinds && kinds.length > 0) {
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sql += ` AND nodes.kind IN (${kinds.map(() => '?').join(',')})`;
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params.push(...kinds);
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}
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if (languages && languages.length > 0) {
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sql += ` AND nodes.language IN (${languages.map(() => '?').join(',')})`;
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params.push(...languages);
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}
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sql += ' ORDER BY score LIMIT ? OFFSET ?';
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params.push(limit, offset);
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const rows = this.db.prepare(sql).all(...params) as (NodeRow & { score: number })[];
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return rows.map((row) => ({
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node: rowToNode(row),
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score: Math.abs(row.score), // bm25 returns negative scores
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}));
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}
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// ===========================================================================
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// Edge Operations
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// ===========================================================================
|
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/**
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* Insert a new edge
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*/
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insertEdge(edge: Edge): void {
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if (!this.stmts.insertEdge) {
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this.stmts.insertEdge = this.db.prepare(`
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INSERT INTO edges (source, target, kind, metadata, line, col)
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VALUES (@source, @target, @kind, @metadata, @line, @col)
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`);
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}
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this.stmts.insertEdge.run({
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source: edge.source,
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target: edge.target,
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kind: edge.kind,
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metadata: edge.metadata ? JSON.stringify(edge.metadata) : null,
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line: edge.line ?? null,
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col: edge.column ?? null,
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});
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}
|
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/**
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* Insert multiple edges in a transaction
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*/
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insertEdges(edges: Edge[]): void {
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this.db.transaction(() => {
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for (const edge of edges) {
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this.insertEdge(edge);
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}
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})();
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}
|
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|
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/**
|
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* Delete all edges from a source node
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*/
|
|
deleteEdgesBySource(sourceId: string): void {
|
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if (!this.stmts.deleteEdgesBySource) {
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this.stmts.deleteEdgesBySource = this.db.prepare('DELETE FROM edges WHERE source = ?');
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}
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this.stmts.deleteEdgesBySource.run(sourceId);
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}
|
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|
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/**
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* Get outgoing edges from a node
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*/
|
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getOutgoingEdges(sourceId: string, kinds?: EdgeKind[]): Edge[] {
|
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if (kinds && kinds.length > 0) {
|
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const sql = `SELECT * FROM edges WHERE source = ? AND kind IN (${kinds.map(() => '?').join(',')})`;
|
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const rows = this.db.prepare(sql).all(sourceId, ...kinds) as EdgeRow[];
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return rows.map(rowToEdge);
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}
|
|
|
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if (!this.stmts.getEdgesBySource) {
|
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this.stmts.getEdgesBySource = this.db.prepare('SELECT * FROM edges WHERE source = ?');
|
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}
|
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const rows = this.stmts.getEdgesBySource.all(sourceId) as EdgeRow[];
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return rows.map(rowToEdge);
|
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}
|
|
|
|
/**
|
|
* Get incoming edges to a node
|
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*/
|
|
getIncomingEdges(targetId: string, kinds?: EdgeKind[]): Edge[] {
|
|
if (kinds && kinds.length > 0) {
|
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const sql = `SELECT * FROM edges WHERE target = ? AND kind IN (${kinds.map(() => '?').join(',')})`;
|
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const rows = this.db.prepare(sql).all(targetId, ...kinds) as EdgeRow[];
|
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return rows.map(rowToEdge);
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}
|
|
|
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if (!this.stmts.getEdgesByTarget) {
|
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this.stmts.getEdgesByTarget = this.db.prepare('SELECT * FROM edges WHERE target = ?');
|
|
}
|
|
const rows = this.stmts.getEdgesByTarget.all(targetId) as EdgeRow[];
|
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return rows.map(rowToEdge);
|
|
}
|
|
|
|
// ===========================================================================
|
|
// File Operations
|
|
// ===========================================================================
|
|
|
|
/**
|
|
* Insert or update a file record
|
|
*/
|
|
upsertFile(file: FileRecord): void {
|
|
if (!this.stmts.upsertFile) {
|
|
this.stmts.upsertFile = this.db.prepare(`
|
|
INSERT INTO files (path, content_hash, language, size, modified_at, indexed_at, node_count, errors)
|
|
VALUES (@path, @contentHash, @language, @size, @modifiedAt, @indexedAt, @nodeCount, @errors)
|
|
ON CONFLICT(path) DO UPDATE SET
|
|
content_hash = @contentHash,
|
|
language = @language,
|
|
size = @size,
|
|
modified_at = @modifiedAt,
|
|
indexed_at = @indexedAt,
|
|
node_count = @nodeCount,
|
|
errors = @errors
|
|
`);
|
|
}
|
|
|
|
this.stmts.upsertFile.run({
|
|
path: file.path,
|
|
contentHash: file.contentHash,
|
|
language: file.language,
|
|
size: file.size,
|
|
modifiedAt: file.modifiedAt,
|
|
indexedAt: file.indexedAt,
|
|
nodeCount: file.nodeCount,
|
|
errors: file.errors ? JSON.stringify(file.errors) : null,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Delete a file record and its nodes
|
|
*/
|
|
deleteFile(filePath: string): void {
|
|
this.db.transaction(() => {
|
|
this.deleteNodesByFile(filePath);
|
|
if (!this.stmts.deleteFile) {
|
|
this.stmts.deleteFile = this.db.prepare('DELETE FROM files WHERE path = ?');
|
|
}
|
|
this.stmts.deleteFile.run(filePath);
|
|
})();
|
|
}
|
|
|
|
/**
|
|
* Get a file record by path
|
|
*/
|
|
getFileByPath(filePath: string): FileRecord | null {
|
|
if (!this.stmts.getFileByPath) {
|
|
this.stmts.getFileByPath = this.db.prepare('SELECT * FROM files WHERE path = ?');
|
|
}
|
|
const row = this.stmts.getFileByPath.get(filePath) as FileRow | undefined;
|
|
return row ? rowToFileRecord(row) : null;
|
|
}
|
|
|
|
/**
|
|
* Get all tracked files
|
|
*/
|
|
getAllFiles(): FileRecord[] {
|
|
if (!this.stmts.getAllFiles) {
|
|
this.stmts.getAllFiles = this.db.prepare('SELECT * FROM files ORDER BY path');
|
|
}
|
|
const rows = this.stmts.getAllFiles.all() as FileRow[];
|
|
return rows.map(rowToFileRecord);
|
|
}
|
|
|
|
/**
|
|
* Get files that need re-indexing (hash changed)
|
|
*/
|
|
getStaleFiles(currentHashes: Map<string, string>): FileRecord[] {
|
|
const files = this.getAllFiles();
|
|
return files.filter((f) => {
|
|
const currentHash = currentHashes.get(f.path);
|
|
return currentHash && currentHash !== f.contentHash;
|
|
});
|
|
}
|
|
|
|
// ===========================================================================
|
|
// Unresolved References
|
|
// ===========================================================================
|
|
|
|
/**
|
|
* Insert an unresolved reference
|
|
*/
|
|
insertUnresolvedRef(ref: UnresolvedReference): void {
|
|
if (!this.stmts.insertUnresolved) {
|
|
this.stmts.insertUnresolved = this.db.prepare(`
|
|
INSERT INTO unresolved_refs (from_node_id, reference_name, reference_kind, line, col, candidates)
|
|
VALUES (@fromNodeId, @referenceName, @referenceKind, @line, @col, @candidates)
|
|
`);
|
|
}
|
|
|
|
this.stmts.insertUnresolved.run({
|
|
fromNodeId: ref.fromNodeId,
|
|
referenceName: ref.referenceName,
|
|
referenceKind: ref.referenceKind,
|
|
line: ref.line,
|
|
col: ref.column,
|
|
candidates: ref.candidates ? JSON.stringify(ref.candidates) : null,
|
|
});
|
|
}
|
|
|
|
/**
|
|
* Delete unresolved references from a node
|
|
*/
|
|
deleteUnresolvedByNode(nodeId: string): void {
|
|
if (!this.stmts.deleteUnresolvedByNode) {
|
|
this.stmts.deleteUnresolvedByNode = this.db.prepare(
|
|
'DELETE FROM unresolved_refs WHERE from_node_id = ?'
|
|
);
|
|
}
|
|
this.stmts.deleteUnresolvedByNode.run(nodeId);
|
|
}
|
|
|
|
/**
|
|
* Get unresolved references by name (for resolution)
|
|
*/
|
|
getUnresolvedByName(name: string): UnresolvedReference[] {
|
|
if (!this.stmts.getUnresolvedByName) {
|
|
this.stmts.getUnresolvedByName = this.db.prepare(
|
|
'SELECT * FROM unresolved_refs WHERE reference_name = ?'
|
|
);
|
|
}
|
|
const rows = this.stmts.getUnresolvedByName.all(name) as UnresolvedRefRow[];
|
|
return rows.map((row) => ({
|
|
fromNodeId: row.from_node_id,
|
|
referenceName: row.reference_name,
|
|
referenceKind: row.reference_kind as EdgeKind,
|
|
line: row.line,
|
|
column: row.col,
|
|
candidates: row.candidates ? JSON.parse(row.candidates) : undefined,
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Get all unresolved references
|
|
*/
|
|
getUnresolvedReferences(): UnresolvedReference[] {
|
|
const rows = this.db.prepare('SELECT * FROM unresolved_refs').all() as UnresolvedRefRow[];
|
|
return rows.map((row) => ({
|
|
fromNodeId: row.from_node_id,
|
|
referenceName: row.reference_name,
|
|
referenceKind: row.reference_kind as EdgeKind,
|
|
line: row.line,
|
|
column: row.col,
|
|
candidates: row.candidates ? JSON.parse(row.candidates) : undefined,
|
|
}));
|
|
}
|
|
|
|
/**
|
|
* Delete all unresolved references (after resolution)
|
|
*/
|
|
clearUnresolvedReferences(): void {
|
|
this.db.exec('DELETE FROM unresolved_refs');
|
|
}
|
|
|
|
/**
|
|
* Delete resolved references by their IDs
|
|
*/
|
|
deleteResolvedReferences(fromNodeIds: string[]): void {
|
|
if (fromNodeIds.length === 0) return;
|
|
const placeholders = fromNodeIds.map(() => '?').join(',');
|
|
this.db.prepare(`DELETE FROM unresolved_refs WHERE from_node_id IN (${placeholders})`).run(...fromNodeIds);
|
|
}
|
|
|
|
// ===========================================================================
|
|
// Statistics
|
|
// ===========================================================================
|
|
|
|
/**
|
|
* Get graph statistics
|
|
*/
|
|
getStats(): GraphStats {
|
|
const nodeCount = (
|
|
this.db.prepare('SELECT COUNT(*) as count FROM nodes').get() as { count: number }
|
|
).count;
|
|
|
|
const edgeCount = (
|
|
this.db.prepare('SELECT COUNT(*) as count FROM edges').get() as { count: number }
|
|
).count;
|
|
|
|
const fileCount = (
|
|
this.db.prepare('SELECT COUNT(*) as count FROM files').get() as { count: number }
|
|
).count;
|
|
|
|
const nodesByKind = {} as Record<NodeKind, number>;
|
|
const nodeKindRows = this.db
|
|
.prepare('SELECT kind, COUNT(*) as count FROM nodes GROUP BY kind')
|
|
.all() as Array<{ kind: string; count: number }>;
|
|
for (const row of nodeKindRows) {
|
|
nodesByKind[row.kind as NodeKind] = row.count;
|
|
}
|
|
|
|
const edgesByKind = {} as Record<EdgeKind, number>;
|
|
const edgeKindRows = this.db
|
|
.prepare('SELECT kind, COUNT(*) as count FROM edges GROUP BY kind')
|
|
.all() as Array<{ kind: string; count: number }>;
|
|
for (const row of edgeKindRows) {
|
|
edgesByKind[row.kind as EdgeKind] = row.count;
|
|
}
|
|
|
|
const filesByLanguage = {} as Record<Language, number>;
|
|
const languageRows = this.db
|
|
.prepare('SELECT language, COUNT(*) as count FROM files GROUP BY language')
|
|
.all() as Array<{ language: string; count: number }>;
|
|
for (const row of languageRows) {
|
|
filesByLanguage[row.language as Language] = row.count;
|
|
}
|
|
|
|
return {
|
|
nodeCount,
|
|
edgeCount,
|
|
fileCount,
|
|
nodesByKind,
|
|
edgesByKind,
|
|
filesByLanguage,
|
|
dbSizeBytes: 0, // Set by caller using DatabaseConnection.getSize()
|
|
lastUpdated: Date.now(),
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Clear all data from the database
|
|
*/
|
|
clear(): void {
|
|
this.nodeCache.clear();
|
|
this.db.transaction(() => {
|
|
this.db.exec('DELETE FROM unresolved_refs');
|
|
this.db.exec('DELETE FROM vectors');
|
|
this.db.exec('DELETE FROM edges');
|
|
this.db.exec('DELETE FROM nodes');
|
|
this.db.exec('DELETE FROM files');
|
|
})();
|
|
}
|
|
}
|