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authordrh <>2025-05-14 16:40:05 +0000
committerdrh <>2025-05-14 16:40:05 +0000
commit691b44a1b3808855c2095d26f721b5ee8aad48a0 (patch)
treef9933d09e72ff1311cdec932e6d8181a7d0a3341 /src/analyze.c
parentc02ac7b9d7e5ac6a9b60fb80fec1f713c985d42b (diff)
downloadsqlite-691b44a1b3808855c2095d26f721b5ee8aad48a0.tar.gz
sqlite-691b44a1b3808855c2095d26f721b5ee8aad48a0.zip
Back out the "low-quality index" query planner hack of check-in
[bcac937526d9a6ef]. Subsequent query planner enhancements for dealing with star-queries make that change unnecessary and the change was recently found to cause a performance regression in an unrelated query. Also fix a typo in a debugging message. FossilOrigin-Name: e7dcf25efae364b7cdf9eb8265803c816c8b8557e4a7684da428badc6ffb3875
Diffstat (limited to 'src/analyze.c')
-rw-r--r--src/analyze.c10
1 files changed, 0 insertions, 10 deletions
diff --git a/src/analyze.c b/src/analyze.c
index 8ca0e3e74..2721f2523 100644
--- a/src/analyze.c
+++ b/src/analyze.c
@@ -1576,16 +1576,6 @@ static void decodeIntArray(
while( z[0]!=0 && z[0]!=' ' ) z++;
while( z[0]==' ' ) z++;
}
-
- /* Set the bLowQual flag if the peak number of rows obtained
- ** from a full equality match is so large that a full table scan
- ** seems likely to be faster than using the index.
- */
- if( aLog[0] > 66 /* Index has more than 100 rows */
- && aLog[0] <= aLog[nOut-1] /* And only a single value seen */
- ){
- pIndex->bLowQual = 1;
- }
}
}