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Escape LIKE metacharacters in FTS detection

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This commit is contained in:
Simon Willison 2026-09-08 21:12:23 -07:00
commit bf348a22fc
1 changed files with 5 additions and 4 deletions
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9
datasette/utils/__init__.py
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@ -829,13 +829,14 @@ def detect_fts(conn, table):
def detect_fts_sql(table):
escaped_table = table.replace("\\", "\\\\").replace("%", "\\%").replace("_", "\\_")
return (
r"""
select name from sqlite_master
where rootpage = 0
and (
sql like :fts_double_quoted
or sql like :fts_bracket_quoted
sql like :fts_double_quoted escape char(92)
or sql like :fts_bracket_quoted escape char(92)
or (
tbl_name = :table
and sql like '%VIRTUAL TABLE%USING FTS%'
@ -843,8 +844,8 @@ def detect_fts_sql(table):
)
""",
{
"fts_double_quoted": f'%VIRTUAL TABLE%USING FTS%content="{table}"%',
"fts_bracket_quoted": f"%VIRTUAL TABLE%USING FTS%content=[{table}]%",
"fts_double_quoted": f'%VIRTUAL TABLE%USING FTS%content="{escaped_table}"%',
"fts_bracket_quoted": f"%VIRTUAL TABLE%USING FTS%content=[{escaped_table}]%",
"table": table,
},
)