From: drh <drh@noemail.net>
Date: Mon, 10 Jul 2017 17:00:31 +0000 (+0000)
Subject: When multiple constraints need to be evaluated for a row, do any constraints
X-Git-Tag: version-3.20.0~96
X-Git-Url: http://git.ipfire.org/gitweb/gitweb.cgi?a=commitdiff_plain;h=90e39ec34904055d7bcd967d01b4d2dd31d6bd58;p=thirdparty%2Fsqlite.git

When multiple constraints need to be evaluated for a row, do any constraints
that involve correlated subqueries last.  Hence, the priority is index-covered
constraints first, correlated subquery constraints last, and all others in
the middle.  This is a
follow-on and improvement to the push-down optimization of check-in [d7bb79ed].

FossilOrigin-Name: c4cb90487f34937605732c3959891075e2aabfb0bd05e55c44565d65867093ea
---

90e39ec34904055d7bcd967d01b4d2dd31d6bd58
diff --cc manifest
index e4b8deb363,d7121fcc18..5e78844516
--- a/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C For\ssqlite3TreeView()\sdebugging\soutput,\sshow\sthe\sExpr.flags\sfield\son\nscalar\ssubqueries.
- D 2017-07-10T13:24:58.019
 -C Additional\sdebugging\sNoop-comment\sin\sthe\sconstraint\sgenerator\swhen\nwheretrace\sis\senabled.
 -D 2017-07-10T16:38:14.687
++C When\smultiple\sconstraints\sneed\sto\sbe\sevaluated\sfor\sa\srow,\sdo\sany\sconstraints\nthat\sinvolve\scorrelated\ssubqueries\slast.\s\sHence,\sthe\spriority\sis\sindex-covered\nconstraints\sfirst,\scorrelated\ssubquery\sconstraints\slast,\sand\sall\sothers\sin\nthe\smiddle.\s\sThis\sis\sa\nfollow-on\sand\simprovement\sto\sthe\spush-down\soptimization\sof\scheck-in\s[d7bb79ed].
++D 2017-07-10T17:00:31.898
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  U drh
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diff --cc manifest.uuid
index 2957a08a1c,fea24416b7..71dc779008
--- a/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
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