Enable FTS5 in SQLite

[zanieb]

No description provided.

[geofft]

LGTM, should we add a test for this? The one I came up with is

$ uvx python@3.14b4
Python 3.14.0b4 (main, Jul  8 2025, 21:00:06) [Clang 20.1.4 ] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import sqlite3
>>> s = sqlite3.connect(":memory:")
>>> c = s.cursor()
>>> c.execute("CREATE VIRTUAL TABLE email USING fts5(sender, title, body);")
Traceback (most recent call last):
  File "<python-input-3>", line 1, in <module>
    c.execute("CREATE VIRTUAL TABLE email USING fts5(sender, title, body);")
    ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
sqlite3.OperationalError: no such module: fts5

[geofft]

$ cat test.py
import sqlite3
s = sqlite3.connect(":memory:")
c = s.cursor()
c.execute("PRAGMA compile_options;")
for [opt] in c.fetchall():
  print(opt)
$ diff <(uvx python@3.14b3 test.py) <(uvx python@3.14b4 test.py)
21,23d20
< ENABLE_FTS4
< ENABLE_FTS5
< ENABLE_GEOPOLY
25d21
< ENABLE_RTREE
32c28
< MAX_FUNCTION_ARG=127
---
> MAX_FUNCTION_ARG=1000

Should we care about these other extensions too?

[zanieb]

Yeah it makes sense to enable anything that's common in the wild. A test seems reasonable, do you want to add it?

[geofft]

Looks like there's some tests already. Since this is my first time actually running them, I'm going to let CI chew on this to make sure the tests fail on the full matrix, and then I'll push the #defines to fix it.

[groksrc]

We could really use this fix, our project is broken without fts5.

basicmachines-co/basic-memory#225
basicmachines-co/basic-memory#221

[phernandez]

To add more context, I'm running on OS X and fts5 is currently broken, as of a couple days ago

sqlite_test.py

#!/usr/bin/env -S uv run -vv --script

import sys

print(".".join(map(str, sys.version_info[:3])))

help('modules sqlite3')

import sqlite3
# Connect to the database
conn = sqlite3.connect(':memory')
cur = conn.cursor()

cur.execute('pragma compile_options;')
available_pragmas = cur.fetchall()
conn.close()

print(available_pragmas)

if ('ENABLE_FTS5',) in available_pragmas:
    print('YES')
else:
    print('NO')

output:

➜  dev uv --version
uv 0.7.20 (251420396 2025-07-09)
➜  dev ./sqlite_test.py
DEBUG uv 0.7.20 (251420396 2025-07-09)
DEBUG No project found; searching for Python interpreter
DEBUG No Python version file found in ancestors of working directory: /Users/phernandez/dev
DEBUG Searching for default Python interpreter in virtual environments, managed installations, or search path
DEBUG Failed to inspect Python interpreter from virtual environment at `/Users/phernandez/bin/python3`
TRACE Skipping missing interpreter at /Users/phernandez/bin/python3
DEBUG Searching for managed installations at `/Users/phernandez/.local/share/uv/python`
DEBUG Found managed installation `cpython-3.13.5-macos-aarch64-none`
TRACE Found cached interpreter info for Python 3.13.5, skipping query of: /Users/phernandez/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/bin/python3.13
DEBUG Found `cpython-3.13.5-macos-aarch64-none` at `/Users/phernandez/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/bin/python3.13` (managed installations)
DEBUG Using Python 3.13.5 interpreter at: /Users/phernandez/.local/share/uv/python/cpython-3.13.5-macos-aarch64-none/bin/python3.13
DEBUG Running `python ./sqlite_test.py`
DEBUG Spawned child 13899 in process group 13898
3.13.5

Here is a list of modules whose name or summary contains 'sqlite3'.
If there are any, enter a module name to get more help.

_sqlite3
dbm.sqlite3
sqlite3 - The sqlite3 extension module provides a DB-API 2.0 (PEP 249) compliant
sqlite3.__main__ - A simple SQLite CLI for the sqlite3 module.
sqlite3.dbapi2
sqlite3.dump

[('ATOMIC_INTRINSICS=1',), ('COMPILER=clang-20.1.4',), ('DEFAULT_AUTOVACUUM',), ('DEFAULT_CACHE_SIZE=-2000',), ('DEFAULT_FILE_FORMAT=4',), ('DEFAULT_JOURNAL_SIZE_LIMIT=-1',), ('DEFAULT_MMAP_SIZE=0',), ('DEFAULT_PAGE_SIZE=4096',), ('DEFAULT_PCACHE_INITSZ=20',), ('DEFAULT_RECURSIVE_TRIGGERS',), ('DEFAULT_SECTOR_SIZE=4096',), ('DEFAULT_SYNCHRONOUS=2',), ('DEFAULT_WAL_AUTOCHECKPOINT=1000',), ('DEFAULT_WAL_SYNCHRONOUS=2',), ('DEFAULT_WORKER_THREADS=0',), ('DIRECT_OVERFLOW_READ',), ('ENABLE_DBSTAT_VTAB',), ('ENABLE_FTS3',), ('ENABLE_FTS3_PARENTHESIS',), ('ENABLE_FTS3_TOKENIZER',), ('ENABLE_MATH_FUNCTIONS',), ('MALLOC_SOFT_LIMIT=1024',), ('MAX_ATTACHED=10',), ('MAX_COLUMN=2000',), ('MAX_COMPOUND_SELECT=500',), ('MAX_DEFAULT_PAGE_SIZE=8192',), ('MAX_EXPR_DEPTH=1000',), ('MAX_FUNCTION_ARG=1000',), ('MAX_LENGTH=1000000000',), ('MAX_LIKE_PATTERN_LENGTH=50000',), ('MAX_MMAP_SIZE=0x7fff0000',), ('MAX_PAGE_COUNT=0xfffffffe',), ('MAX_PAGE_SIZE=65536',), ('MAX_SQL_LENGTH=1000000000',), ('MAX_TRIGGER_DEPTH=1000',), ('MAX_VARIABLE_NUMBER=32766',), ('MAX_VDBE_OP=250000000',), ('MAX_WORKER_THREADS=8',), ('MUTEX_PTHREADS',), ('SYSTEM_MALLOC',), ('TEMP_STORE=1',), ('THREADSAFE=1',)]
NO
DEBUG Command exited with code: 0