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| author | drh <> | 2025-01-03 11:51:50 +0000 |
|---|---|---|
| committer | drh <> | 2025-01-03 11:51:50 +0000 |
| commit | ded37f337b7b2e916657a83732aaec40eb146282 (patch) | |
| tree | 6775049c348cbdd70493a2aba6604c4d415ca344 /src | |
| parent | 8d6e3f513c049a07d34f77ab526259c916418af6 (diff) | |
| download | sqlite-ded37f337b7b2e916657a83732aaec40eb146282.tar.gz sqlite-ded37f337b7b2e916657a83732aaec40eb146282.zip | |
Add comment to the columnIsGoodIndexCandidate() routine to record the results
of a failed experiment. No changes to code.
FossilOrigin-Name: 9ee57a30a49d9813bf2669a5d8346f7e018e3fbf1792739951311a8d3a249d45
Diffstat (limited to 'src')
| -rw-r--r-- | src/where.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/where.c b/src/where.c index c9698699b..4325374bc 100644 --- a/src/where.c +++ b/src/where.c @@ -860,6 +860,11 @@ static int constraintCompatibleWithOuterJoin( ** more than 20, then return false. ** ** 3. If no disqualifying conditions above are found, return true. +** +** 2025-01-03: I experimented with a new rule that returns false if the +** the datatype of the column is "BOOLEAN". This did not improve +** performance on any queries at hand, but it did burn CPU cycles, so the +** idea was not committed. */ static SQLITE_NOINLINE int columnIsGoodIndexCandidate( const Table *pTab, |