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SQLite FTS5: "unable to use function highlight in the requested context"; https://github.com/lemon24/reader/issues/122
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-- fts5 | |
CREATE VIRTUAL TABLE entries USING fts5( | |
id UNINDEXED, | |
content | |
); | |
INSERT INTO entries | |
VALUES | |
('one', 'one'), | |
('two', 'another one' ), | |
('two', 'another two' ) | |
; | |
-- don't work | |
SELECT | |
group_concat(highlight(entries, 1, '>', '<')) | |
FROM entries | |
WHERE entries MATCH 'an*' | |
GROUP BY id; | |
SELECT group_concat(details) | |
FROM ( | |
SELECT | |
id, | |
highlight(entries, 1, '>', '<') as details | |
FROM entries | |
WHERE entries MATCH 'an*' | |
) | |
GROUP BY id; | |
WITH entries_details AS ( | |
SELECT | |
id, | |
highlight(entries, 1, '>', '<') as details | |
FROM entries | |
WHERE entries MATCH 'an*' | |
) | |
SELECT group_concat(details) | |
FROM entries_details | |
GROUP BY id; | |
SELECT | |
group_concat(id), | |
highlight(entries, 1, '>', '<') | |
FROM entries | |
WHERE entries MATCH 'an*' | |
GROUP BY id; | |
-- work; see: | |
-- https://www.mail-archive.com/sqlite-users@mailinglists.sqlite.org/msg115821.html | |
SELECT group_concat(details) | |
FROM ( | |
SELECT | |
id, | |
highlight(entries, 1, '>', '<') as details | |
FROM entries | |
WHERE entries MATCH 'an*' | |
LIMIT -1 OFFSET 0 | |
) | |
GROUP BY id; | |
WITH entries_details AS ( | |
SELECT | |
id, | |
highlight(entries, 1, '>', '<') as details | |
FROM entries | |
WHERE entries MATCH 'an*' | |
LIMIT -1 OFFSET 0 | |
) | |
SELECT group_concat(details) | |
FROM entries_details | |
GROUP BY id; | |
-- fts4 | |
CREATE VIRTUAL TABLE entries4 USING fts4( | |
id, | |
content, | |
notindexed=id | |
); | |
INSERT INTO entries4 | |
VALUES | |
('one', 'one'), | |
('two', 'another one' ), | |
('two', 'another two' ) | |
; | |
SELECT | |
group_concat(snippet(entries4, '>', '<', '...', 1)) | |
FROM entries4 | |
WHERE entries4 MATCH 'an*' | |
GROUP BY id; | |
-- Output: | |
-- | |
-- $ sqlite3 ':memory:' '.read sqlite-fts5-highlight-group-by.sql' | |
-- Error: near line 17: unable to use function highlight in the requested context | |
-- Error: near line 23: unable to use function highlight in the requested context | |
-- Error: near line 33: unable to use function highlight in the requested context | |
-- Error: near line 44: unable to use function highlight in the requested context | |
-- >another< one,>another< two | |
-- >another< one,>another< two | |
-- Error: near line 92: unable to use function snippet in the requested context | |
-- | |
-- $ sqlite3 -version | |
-- 3.22.0 2018-01-22 18:45:57 0c55d179733b46d8d0ba4d88e01a25e10677046ee3da1d5b1581e86726f2alt1 |
This works for FTS5. Many thanks.
My query
SELECT t_col1, t_col2H, max(t_col3) AS t_col3 FROM
(SELECT t.col1 AS t_col1, highlight(table1_fts, 0, '<b>', '</b>') AS t_col2H, t.col3 AS t_col3
FROM table1 t JOIN table1_fts tf ON t.id = tf.rowid
WHERE t.col1 IN (1,3,9,10,12,15) AND table1_fts MATCH 'set*' LIMIT -1)
GROUP BY t_col1;
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This solved my issue. Thank you very much for posting. I found that even just
LIMIT -1
seems to work, I didn’t even need theOFFSET 0
.