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Fix sqlite-vector extension not loading on subsequent connections #15

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Merged
Mte90 merged 2 commits into from
Nov 11, 2025
Merged

Fix sqlite-vector extension not loading on subsequent connections #15

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Copilot Nov 11, 2025
d5df60a
Fix sqlite-vector extension loading on multiple connections
Copilot Nov 11, 2025
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16 changes: 4 additions & 12 deletions db/vector_operations.py
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Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,6 @@
# Retry policy for DB-locked operations
DB_LOCK_RETRY_COUNT = 6
DB_LOCK_RETRY_BASE_DELAY = 0.05 # seconds, exponential backoff multiplier
_sqlite_vector_loaded = False


def connect_db(db_path: str, timeout: float = 30.0) -> sqlite3.Connection:
Expand Down Expand Up @@ -53,26 +52,19 @@ def load_sqlite_vector_extension(conn: sqlite3.Connection) -> None:
CRITICAL: This function will ALWAYS crash the program if the extension fails to load.
STRICT mode is mandatory and cannot be disabled.

NOTE: SQLite extensions are loaded per-connection, not per-process. This function must be
called for each connection that needs vector operations.

Args:
conn: SQLite database connection

Raises:
RuntimeError: If the extension fails to load
"""
global _sqlite_vector_loaded

if _sqlite_vector_loaded:
logger.debug("sqlite-vector: already loaded in-process, skipping load.")
return

try:
ext_path = importlib.resources.files(SQLITE_VECTOR_PKG) / SQLITE_VECTOR_RESOURCE
conn.load_extension(str(ext_path))
_sqlite_vector_loaded = True
try:
conn.enable_load_extension(False)
except Exception:
pass
logger.debug(f"sqlite-vector extension loaded for connection {id(conn)}")
# optional quick check: call vector_version()
try:
cur = conn.execute(f"SELECT {SQLITE_VECTOR_VERSION_FN}()")
Expand Down