Merge the LEFT JOIN query flattener fixes from 3.19.2.

FossilOrigin-Name: 6513e4a121e32df7e5cd95f47cdf8049b85bdbcb378cf23db29838fb1143d3ce

diff --cc manifest
index 3b4d139de2e494161f99f2df5e9962dc5dc182cf,d8ee2f52b10b7c87b39f91a75a5af8eb8b36e42e..2b231d7f0ca898cf79a3c9b1e66e678f5bf1dd43
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C The\sTK_IF_NULL_ROW\sexpression\snode\smust\sbe\streated\sas\sa\svariable\sthat\nreferences\sthe\stable\sExpr.iTable.\nProposed\sfix\sfor\sticket\s[7fde638e94287d2c].
- D 2017-05-25T00:08:48.296
 -C Version\s3.19.2
 -D 2017-05-25T16:50:27.649
++C Merge\sthe\sLEFT\sJOIN\squery\sflattener\sfixes\sfrom\s3.19.2.
++D 2017-05-25T17:27:52.435
  F Makefile.in 1cc758ce3374a32425e4d130c2fe7b026b20de5b8843243de75f087c0a2661fb
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc 8eeb80162074004e906b53d7340a12a14c471a83743aab975947e95ce061efcc
@@@ -404,8 -403,8 +404,8 @@@ F src/printf.c 8757834f1b54dae512fb25eb
  F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
  F src/resolve.c 3e518b962d932a997fae373366880fc028c75706
  F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
- F src/select.c 9db6887514a663ef4eb117f12cbae613bece9267f180d0fcdfa49402b013483e
+ F src/select.c c444ca057d48cf1a4eb8f6a58fbc13418a7f83ae94a6bd6f29f7ad6c704a9e4c
 -F src/shell.c a37d96b20b3644d0eb905df5aa7a0fcf9f6e73c15898337230c760a24a8df794
 +F src/shell.c 615fb4e2069e99549b0ea0983e9c877c459363fc76a4bdf052c652919312216a
  F src/sqlite.h.in 8dd468837a4f6d76713e3a4cc65bea48095009038593d41040ab46c1b351197f
  F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
  F src/sqlite3ext.h 58fd0676d3111d02e62e5a35992a7d3da5d3f88753acc174f2d37b774fbbdd28
@@@ -1060,7 -1059,7 +1060,7 @@@ F test/rdonly.test 64e2696c322e3538df0b
  F test/regexp1.test 497ea812f264d12b6198d6e50a76be4a1973a9d8
  F test/regexp2.test 40e894223b3d6672655481493f1be12012f2b33c
  F test/reindex.test 44edd3966b474468b823d481eafef0c305022254
- F test/releasetest.tcl 89ab58d256371a652d1af11d3bf40a8b715b2d44aa0872c972efc60a70e43cf6 x
 -F test/releasetest.tcl 936c8b9c72d46a86d0f9d65c536e883c2d79a8f53a5324283757bfc9d8b5a656 x
++F test/releasetest.tcl 7bb585433ce7fb2a2c255ae4b5e24f1bc27fe177ec1120f886cc4852f48f5ee9 x
  F test/resolver01.test f4022acafda7f4d40eca94dbf16bc5fc4ac30ceb
  F test/rollback.test 458fe73eb3ffdfdf9f6ba3e9b7350a6220414dea
  F test/rollback2.test 8435d6ff0f13f51d2a4181c232e706005fa90fc5
@@@ -1581,7 -1580,10 +1581,7 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P 57a60e959c198b87ed29fab14356f89e0ea7cdb1dd99adbea45b40e8d0cb310a
- R 2019949ca76bb834bedafaf9dad04b39
 -P 1a074c8a2bc0b28918ef905339d11a21d30101b4ea8c06c8b3faca7d17237538
 -R f4b3c258ec4a8c30fd1362752bfd9b5c
 -T +bgcolor * #d0c0ff
 -T +sym-release *
 -T +sym-version-3.19.2 *
++P 77fc23013cebc7797985864b91d78db5d0e2469511732044ebfaf02b891c979a edb4e819b0c058c7d74d27ebd14cc5ceb2bad6a6144a486a970182b7afe3f8b9
++R 48e976f275e28e838432234ac55ec7a3
  U drh
- Z af095858f607efa9e1ee1fae3491ba27
 -Z 1c4850e8eeff11c8d32e6493160f83cd
++Z 8a4512e2e2f5f71bea9b11746a7f953a

diff --cc manifest.uuid
index e59fdb3afa032f8701f44942b91359a90994cee3,b316b7a15589aa628687537d68acd4a926661c53..34497a834fa8dea9d6762d17e2f732674e01fe4e
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- 77fc23013cebc7797985864b91d78db5d0e2469511732044ebfaf02b891c979a
 -edb4e819b0c058c7d74d27ebd14cc5ceb2bad6a6144a486a970182b7afe3f8b9
++6513e4a121e32df7e5cd95f47cdf8049b85bdbcb378cf23db29838fb1143d3ce

diff --cc test/releasetest.tcl
Simple merge