From: drh <drh@noemail.net>
Date: Mon, 24 Feb 2020 17:05:09 +0000 (+0000)
Subject: If STAT4 determines that a WHERE clause term that is not used by an index
X-Git-Tag: version-3.32.0~148
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f575c1cf065dd547caecb600051313087fb65fd8;p=thirdparty%2Fsqlite.git

If STAT4 determines that a WHERE clause term that is not used by an index
has very high probability of being true, then do not use that term to reduce
the estimated output row count.

FossilOrigin-Name: 40739c793b0e98a3bae296d3a1f74944edcdd4cc33c26b417fde4eaf6f14d062
---

f575c1cf065dd547caecb600051313087fb65fd8
diff --cc manifest
index f338ba88f8,ac8c74c984..bff710da8f
--- a/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sa\sproblem\swith\sALTER\sTABLE\sfor\sviews\sthat\shave\sa\snested\sFROM\sclause.\nTicket\s[f50af3e8a565776b].
- D 2020-02-23T17:34:45.938
 -C Rework\sthis\schanges\sso\sthat\sinstead\sof\ssetting\sthe\sWhereTerm.truthProb\swhen\na\sterm\sis\sseen\sto\sbe\sof\slow\sselectivity,\sit\smerely\ssets\sa\snew\sflag\n(the\sTERM_HIGHTRUTH\sflag)\swhich\scauses\swhereLoopOutputAdjust()\sto\signore\nthat\sterm.
 -D 2020-02-24T16:46:08.182
++C If\sSTAT4\sdetermines\sthat\sa\sWHERE\sclause\sterm\sthat\sis\snot\sused\sby\san\sindex\nhas\svery\shigh\sprobability\sof\sbeing\strue,\sthen\sdo\snot\suse\sthat\sterm\sto\sreduce\nthe\sestimated\soutput\srow\scount.
++D 2020-02-24T17:05:09.915
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -1858,7 -1859,7 +1859,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
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+ R 2f59a601b560c09f0f628a3935395fd4
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  U drh
- Z b1d396f928d83f91cde5e969c202f590
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++Z 88585aca481f88c3f165f1a6e9b07ffb
diff --cc manifest.uuid
index fc3a50b794,0f1166a39f..a0c4891c50
--- a/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
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