Modify the way the costs of various query plans are estimated. If the user supplies...

FossilOrigin-Name: 90e36676476e8db00658772e6c938242f766d306

diff --cc manifest
index 41c2bd4ae037704f459550622cc4543da3130699,35f78b46c22d9189b0ec7391f201ea445621a084..c2ff19fbfef3dba02cb868aede8d78e47a685660
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\sthe\ssqlite3_rtree_query_callback()\sAPI\sto\sthe\sRTree\svirtual\stable.\n(Cherrypick\sfrom\sthe\ssessions\sbranch.)
- D 2014-04-28T17:56:19.891
 -C Add\stext\sto\sthe\sheader\scomment\sof\swhereLoopAddBtree()\sdescribing\show\sthe\scosts\sof\svarious\sb-tree\sloops\sare\sestimated.
 -D 2014-04-30T15:00:16.197
++C Modify\sthe\sway\sthe\scosts\sof\svarious\squery\splans\sare\sestimated.\sIf\sthe\suser\ssupplies\sa\slikelihood()\svalue\s(or\sequivalent)\son\san\sindexed\sWHERE\sconstraint,\suse\sit\sto\sestimate\sthe\snumber\sof\sindex\srows\svisited.
++D 2014-04-30T15:22:25.359
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 2ef13430cd359f7b361bb863504e227b25cc7f81
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1165,8 -1166,7 +1166,7 @@@ F tool/vdbe_profile.tcl 67746953071a9f8
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
  F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
- P f5a263658187250044afc1a74000e6f6962733ca
- Q +3dca2809352c6c6d56db74447a814f77011c6220
- R 70a04a84bf76743284b12f147604df6e
- U drh
- Z 8441eee0dd2b010346629b18a46aad71
 -P 9b975bf33cd8fc28c64183a9642bf9fb436a4746
++P af2cbe64adab5f9e3b0f3da00d06428088589d7f 05e6e16cb28c9ffb4596bd2ef81f687c5403ecbb
+ R 20e49e26218874ddfe5fb9438df8f580
+ U dan
 -Z c1e32968c738a6da213a45755f91539c
++Z 75da520dd73c7e9f7e5ee96ec52c5c59

diff --cc manifest.uuid
index fbb0a3e2f9cc7d2900e460f2d1b14b6213e0c494,6ee1deefef0bc023a8e6a2998416eab33d797e56..437f1a27530028c221dcfa6d2c1d55becbf3132e
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- af2cbe64adab5f9e3b0f3da00d06428088589d7f
 -05e6e16cb28c9ffb4596bd2ef81f687c5403ecbb
++90e36676476e8db00658772e6c938242f766d306