From: drh <drh@noemail.net>
Date: Sat, 29 Apr 2017 15:27:04 +0000 (+0000)
Subject: Evaluate WHERE clause terms that reference only the index before evaluating
X-Git-Tag: version-3.19.0~34
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=bc43995f99d3f15aa3cb056068ee7e6b7ca40029;p=thirdparty%2Fsqlite.git

Evaluate WHERE clause terms that reference only the index before evaluating
terms that require the table, and thereby avoid seeking the table row if
index terms are false.
This is called the "push-down" optimization in the MySQL world, we are told.

FossilOrigin-Name: d7bb79ed3a40419d143fbe35c310e51fe7b384a22f082a61ad788671d2d33ee0
---

bc43995f99d3f15aa3cb056068ee7e6b7ca40029
diff --cc manifest
index 8c73ad3567,6cc1fccff6..bf8f046722
--- a/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\snew\stest\sfile\scachespill.test.
- D 2017-04-26T17:21:33.779
 -C Minor\ssize\sand\sperformance\simprovements\sto\sthe\spush-down\soptimization.
 -D 2017-04-29T14:56:55.202
++C Evaluate\sWHERE\sclause\sterms\sthat\sreference\sonly\sthe\sindex\sbefore\sevaluating\nterms\sthat\srequire\sthe\stable,\sand\sthereby\savoid\sseeking\sthe\stable\srow\sif\nindex\sterms\sare\sfalse.\nThis\sis\scalled\sthe\s"push-down"\soptimization\sin\sthe\sMySQL\sworld,\swe\sare\stold.
++D 2017-04-29T15:27:04.896
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diff --cc manifest.uuid
index 44877c7f80,2939f423e1..a192425962
--- a/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
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