Implementation of enhancement request [695a1a53dea6b240]: The query planner

has improved awareness of when indexes on expressions are covering and adjusts
their costs accordingly.

FossilOrigin-Name: e3474d79b27298e96e7686e5a6f9a8e736b8a6568a0a08fb1abe5bcca038ca63

diff --cc manifest
index a15902691985cf3248ca408ff4f1587403746890,c76ad7a3121548643b04b7c133416839de7999aa..d8cdd7a1e9a3b97b42cb6f022a6a48d7c7c83c0e
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Add\sthe\sSQLITE_FCNTL_RESET_CACHE\sverb.\sUse\sit\sto\sensure\sthat\sthe\spage\scache\sis\spurged\sbefore\sand\safter\sa\sthe\srecovery\sextension\sis\srun.
- D 2022-11-28T18:41:41.586
 -C Test\scases\sadded\sderived\sfrom\sthe\senhancment\sticket.
 -D 2022-11-28T18:17:42.151
++C Implementation\sof\senhancement\srequest\s[695a1a53dea6b240]:\sThe\squery\splanner\nhas\simproved\sawareness\sof\swhen\sindexes\son\sexpressions\sare\scovering\sand\sadjusts\ntheir\scosts\saccordingly.
++D 2022-11-28T19:42:48.433
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2064,8 -2064,8 +2064,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P b44ab10c49bc2895483a9d40813be3798710ee713cc4bf04e449dce55a68452a
- R 013988a2db147f7833ada18759e80a5f
- U dan
- Z 0974da01907b06c2d097fc0b34ec52e3
 -P 89d775ada39aed4dc532374ace02156d07dc06e8ae54a194608af0c5a582d20f
 -R e73156e3b8e8d088eb2bbd902f358640
++P 6db0bc4bc0d272b610bef2aeeae43f539ed6e7cc0a9cc767d5af85ecb0019d5f c022c0152ad61a4f56e36f4062609073e2273fbf6f826c20652159be229c2d46
++R cf4309a5723ca7c0ed03679edb5024d5
+ U drh
 -Z b96271db8dd85961a10ccefd57c768e1
++Z 287040c8f243d0f300388e5a2dad7f24
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index 030eff1202a9f557cbc489812f794e2bc055896b,a270d0f31b4cd2f6a06dbab50c12e2bd17bfa4d7..e27e9da559ba82c3e63171beeec0f85cc44f6163
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 6db0bc4bc0d272b610bef2aeeae43f539ed6e7cc0a9cc767d5af85ecb0019d5f
 -c022c0152ad61a4f56e36f4062609073e2273fbf6f826c20652159be229c2d46
++e3474d79b27298e96e7686e5a6f9a8e736b8a6568a0a08fb1abe5bcca038ca63