Improvements to query planning, especially in regards to estimating the

cost and benefit of automatic indexes.

FossilOrigin-Name: 1272fb8991b3888c72dcebf947415883d7727241

diff --cc manifest
index 33d3388ac94aa44e4d31f0d2e41aac66d203c9f0,49473453ec2aa1e3d5216d65ac9479e3ec192e99..bf5d942926a80760d971379f4b3da9ce80650c49
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sCSV\simport\sissue,\sreported\svia\sthe\smailing\slist,\sin\sthe\sshell\swhen\sthe\sfile\sto\sbe\simported\sends\swith\san\sempty\sline.
- D 2014-06-16T22:45:28.779
 -C Add\sthe\sautoindex2.test\stesting\smodule.
 -D 2014-06-17T13:23:36.416
++C Improvements\sto\squery\splanning,\sespecially\sin\sregards\sto\sestimating\sthe\ncost\sand\sbenefit\sof\sautomatic\sindexes.
++D 2014-06-17T15:53:33.099
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in ed5e4aae4799f724699d5509fac2977786414dbb
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1177,7 -1178,7 +1178,7 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P 3181d2069a788adc719decf65dc1bd2e16650c87
- R e15c594b7f416cdaa03cc5ded52dfa16
- U mistachkin
- Z ca873ea75a4dc77a2f68671379d28791
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++P fc918f7d332b8f7cabc79a0f1586bd6760d14d40 ffe3fea47b8ba8ec4557f68243ef3ef5aac00dfd
+ R 4590197fe44138640af30c15c42aaab1
+ U drh
 -Z c2b8b2abeb08d5199560396ab0f820e5
++Z e1065b9ffc1f6e99c7ac540aed1bd3ee

diff --cc manifest.uuid
index 2f140ef165823971993c1eb154099b4252676f37,843a903c192953dc5d82934220e46f680810093e..56bcfd55a5526e79ee6c9dc07426eae23ec9aba3
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@@@ -1,1 -1,1 +1,1 @@@
- fc918f7d332b8f7cabc79a0f1586bd6760d14d40
 -ffe3fea47b8ba8ec4557f68243ef3ef5aac00dfd
++1272fb8991b3888c72dcebf947415883d7727241