More precise determination of when a WHERE clause can be used to drive an

index on an outer join.

FossilOrigin-Name: 318543a91108c6fd0764d7ee7beee49838f54d44c54dae3dc9d4cb8336d52fe1

diff --cc manifest
index 9048bd2ce4b4ff4af24528753bad07b30d9f5f5a,a113e76d970dfab668bc0989ee8918a20d5d8dc6..279205352bad6fd76c642d4dc4ba117079c81b1b
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Do\snot\sallow\sa\sWHERE\sclause\sconstraint\sto\sbe\sused\sto\sdrive\san\sindex\sfor\nthe\sright\soperand\sof\sa\sRIGHT\sJOIN,\ssince\sthis\scan\scause\sproblem\sif\sthe\nconstraint\simplies\sa\snot-NULL\svalue\sfor\sone\sof\sthe\scolumns\sfor\sthe\sleft\noperand\sof\sthe\ssame\sjoin.\s\sSee\n[forum:/forumpost/206d99a16dd9212f|forum\spost\s206d99a16dd9212f].
- D 2022-06-06T15:27:42.276
 -C More\sprecise\sdetermination\sof\swhen\sa\sWHERE/ON\sclause\sterm\scan\sbe\sused\sas\san\nindexed\sjoin\sconstraint.\s\sTestcase\smacros\sadded\sto\sensure\stest\scoverage.
 -D 2022-06-06T22:33:44.489
++C More\sprecise\sdetermination\sof\swhen\sa\sWHERE\sclause\scan\sbe\sused\sto\sdrive\san\nindex\son\san\souter\sjoin.
++D 2022-06-06T23:22:06.986
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -1975,8 -1975,8 +1975,9 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 4b50a55165f4603674a250df89cfc5ac1fef8aabaf433df8400df14d53bfbbe0
- R 36fe1e3adae6d605b2e8ea991b2037d0
 -P c7505765280fb27ec2c8c4da6f87229a4078e3a4a27525226b6bf55864caa04b
++P 4a31b7942a15c9c4363477365784d6d4ac5b1bbe8ff8aeaf2dd3d6532bf8bc96 f419e98c515e704efa11728192b2594e962cb0e6d2d1837f99a8caf65f4d93cb
+ R c2e526412189cf6f0523d76532d3dca9
++T +closed f419e98c515e704efa11728192b2594e962cb0e6d2d1837f99a8caf65f4d93cb
  U drh
- Z 423aad7ac6c7bb7244bb6ead300ddf34
 -Z d50f770c4ee4cf5221452486eef1f28b
++Z 41e91a911a608e23fdf49a547cce512b
  # Remove this line to create a well-formed Fossil manifest.

diff --cc manifest.uuid
index e6384d1de6be9b4baf9a77a0b514969ed61f9e10,8252bae6e1998afd02a69d7939f19559a5a85348..0e10419e6b4477f4261cb5ef0cc9fa8731a3331d
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 4a31b7942a15c9c4363477365784d6d4ac5b1bbe8ff8aeaf2dd3d6532bf8bc96
 -f419e98c515e704efa11728192b2594e962cb0e6d2d1837f99a8caf65f4d93cb
++318543a91108c6fd0764d7ee7beee49838f54d44c54dae3dc9d4cb8336d52fe1