8 Commits (3daaa5c592b0be0490e18a52186a6a6f6d247294)

Author	SHA1	Message	Date
Rene Cannao	3daaa5c592	feat: Implement RAG (Retrieval-Augmented Generation) subsystem ... Adds a complete RAG subsystem to ProxySQL with: - RAG_Tool_Handler implementing all MCP tools for retrieval operations - Database schema with FTS and vector support - FTS, vector, and hybrid search capabilities - Fetch and refetch tools for document/chunk retrieval - Admin tools for monitoring - Configuration variables for RAG parameters - Comprehensive documentation and test scripts Implements v0 deliverables from RAG blueprint: - SQLite schema initialization - Source registry management - MCP tools: search_fts, search_vector, search_hybrid, get_chunks, get_docs, fetch_from_source, admin.stats - Unit/integration tests and examples	1 month ago
Rene Cannao	35b0b224ff	refactor: Remove mcp-catalog_path variable and hardcode catalog path ... Remove the mcp-catalog_path configuration variable and hardcode the catalog database path to datadir/mcp_catalog.db for stability. Rationale: The catalog database is session state, not user configuration. Runtime swapping of the catalog could cause tables to be missed and the catalog to fail even if it was succeeding a second earlier. Changes: - Removed catalog_path from mcp_thread_variables_names array - Removed mcp_catalog_path from MCP_Thread variables struct - Removed getter/setter logic for catalog_path - Hardcoded catalog path to GloVars.datadir/mcp_catalog.db in: - ProxySQL_MCP_Server.cpp (Query_Tool_Handler initialization) - Admin_FlushVariables.cpp (MySQL_Tool_Handler reinitialization) - Updated VARIABLES.md to document the hardcoded path - Updated configure_mcp.sh to remove catalog_path configuration - Updated MCP README to remove catalog_path references	1 month ago
Rene Cannao	c86a048d9c	Implement MCP multi-endpoint architecture with dedicated tool handlers ... This commit implements Option 1 (Multiple Tool Handlers) for the MCP module, where each of the 5 endpoints has its own dedicated tool handler with specific tools. ## Architecture Changes - Created MCP_Tool_Handler base class interface for all tool handlers - Each endpoint now has its own dedicated tool handler: - /mcp/config → Config_Tool_Handler (configuration management) - /mcp/query → Query_Tool_Handler (database exploration) - /mcp/admin → Admin_Tool_Handler (administrative operations) - /mcp/cache → Cache_Tool_Handler (cache management) - /mcp/observe → Observe_Tool_Handler (monitoring & metrics) ## New Files Base Interface: - include/MCP_Tool_Handler.h - Base class for all tool handlers Tool Handlers: - include/Config_Tool_Handler.h, lib/Config_Tool_Handler.cpp - include/Query_Tool_Handler.h, lib/Query_Tool_Handler.cpp - include/Admin_Tool_Handler.h, lib/Admin_Tool_Handler.cpp - include/Cache_Tool_Handler.h, lib/Cache_Tool_Handler.cpp - include/Observe_Tool_Handler.h, lib/Observe_Tool_Handler.cpp Documentation: - doc/MCP/Architecture.md - Comprehensive architecture documentation ## Modified Files - include/MCP_Thread.h, lib/MCP_Thread.cpp - Added 5 tool handler pointers - include/MCP_Endpoint.h, lib/MCP_Endpoint.cpp - Use tool_handler base class - lib/ProxySQL_MCP_Server.cpp - Create and pass handlers to endpoints - lib/Makefile - Added new source files ## Implementation Status - Config_Tool_Handler: Functional (get_config, set_config, list_variables, get_status) - Query_Tool_Handler: Functional (wraps MySQL_Tool_Handler, all 18 tools) - Admin_Tool_Handler: Stub implementations (TODO: implement) - Cache_Tool_Handler: Stub implementations (TODO: implement) - Observe_Tool_Handler: Stub implementations (TODO: implement) See GitHub Issue #8 for detailed TODO list. Co-authored-by: Claude <claude@anthropic.com>	1 month ago
Rene Cannao	28742554b5	Use relative catalog path instead of absolute path ... - Change mcp-catalog_path default from /var/lib/proxysql/mcp_catalog.db to mcp_catalog.db - SQLite accepts relative paths, which are resolved relative to the process working directory - ProxySQL's working directory is its datadir, so the catalog will be stored there - Update configure_mcp.sh to set mcp-catalog_path='mcp_catalog.db' - Update lib/MCP_Thread.cpp default to "mcp_catalog.db" - Update README.md to document relative path behavior	1 month ago
Rene Cannao	221ff23991	Add MySQL exploration MCP tools with SQLite catalog ... Implemented MCP (Model Context Protocol) server providing tools for LLM-based MySQL database exploration: - MySQL_Catalog: SQLite-based catalog for LLM external memory with upsert, get, search, list, merge, delete operations and FTS support - MySQL_Tool_Handler: 17+ database exploration tools with guardrails: * Inventory: list_schemas, list_tables * Structure: describe_table, get_constraints, describe_view * Profiling: table_profile, column_profile * Sampling: sample_rows (max 20), sample_distinct (max 50) * Query: run_sql_readonly (max 200 rows, 2s timeout, SELECT-only) * Relationship: suggest_joins, find_reference_candidates * Catalog: catalog_upsert, catalog_get, catalog_search, catalog_list, catalog_merge, catalog_delete - MCP Module Integration: * Added 6 new configuration variables for MySQL tool handler (mysql_hosts, mysql_ports, mysql_user, mysql_password, mysql_schema, catalog_path) * Added MySQL_Tool_Handler pointer to MCP_Threads_Handler * Implemented tool routing in MCP endpoint for tools/list, tools/describe, and tools/call methods - TAP Tests: Updated to expect 14 MCP variables (was 8) Files: - include/MySQL_Catalog.h, lib/MySQL_Catalog.cpp - include/MySQL_Tool_Handler.h, lib/MySQL_Tool_Handler.cpp - include/MCP_Thread.h, lib/MCP_Thread.cpp - include/MCP_Endpoint.h, lib/MCP_Endpoint.cpp - lib/Makefile, test/tap/tests/mcp_module-t.cpp	1 month ago
Rene Cannao	81c53896bc	Fix MCP module TAP test failures ... - Add MCP variables to load_save_disk_commands map for LOAD/SAVE commands - Add MCP variable validation in is_valid_global_variable() for SET commands - Implement has_variable() method in MCP_Threads_Handler - Add CHECKSUM command handlers for MCP VARIABLES (DISK/MEMORY/MEM) Test results improved from 28 passed / 16 failed to 49 passed / 3 failed. Remaining 3 failures are test expectation issues (boolean representation).	1 month ago
Rene Cannao	245e61ee86	Make MCP_Threads_Handler a standalone independent class ... Remove unnecessary inheritance from MySQL_Threads_Handler. The MCP module should be independent and not depend on MySQL/PostgreSQL thread handlers. Changes: - MCP_Threads_Handler now manages its own pthread_rwlock_t for synchronization - Simplified init() signature (removed unused num/stack parameters) - Added ProxySQL_Main_init_MCP_module() call in main initialization phase - Include only standard C++ headers (pthread.h, cstring, cstdlib)	1 month ago
Rene Cannao	87fff9e046	Add MCP (Model Context Protocol) module skeleton ... Add new MCP module supporting multiple MCP server endpoints over HTTPS with JSON-RPC 2.0 protocol skeleton. Each endpoint (/mcp/config, /mcp/observe, /mcp/query, /mcp/admin, /mcp/cache) is a distinct MCP server with its own authentication configuration. Features: - HTTPS server using existing ProxySQL TLS certificates - JSON-RPC 2.0 skeleton implementation (actual protocol TBD) - 5 MCP endpoints with per-endpoint auth configuration - LOAD/SAVE MCP VARIABLES admin commands - Configuration file support (mcp_variables section) Implementation follows GenAI module pattern: - MCP_Threads_Handler: Main module handler with variable management - ProxySQL_MCP_Server: HTTPS server wrapper using libhttpserver - MCP_JSONRPC_Resource: Base endpoint class with JSON-RPC skeleton	1 month ago