Tweaks to the query planner so that it is better able to deal with star

queries with many dimensions and bad indexes.

FossilOrigin-Name: 1e49081001f93b75ee499536f8a61a0f49225a1745117bb9267249c38c4bf803

manifest

@@ -1,5 +1,5 @@
-C Increase\sthe\snumber\sof\sparallel\spaths\sin\sthe\squery\ssolver\sfrom\s12\sto\s20.\nIn\sthe\s.wheretrace\soutput,\ssort\sthe\sparallel\spaths\sin\sorder\sof\sincreasing\ncost.
-D 2024-05-28T12:41:11.505
+C Tweaks\sto\sthe\squery\splanner\sso\sthat\sit\sis\sbetter\sable\sto\sdeal\swith\sstar\nqueries\swith\smany\sdimensions\sand\sbad\sindexes.
+D 2024-05-28T18:53:36.983
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -840,7 +840,7 @@ F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
 F src/wal.c 887fc4ca3f020ebb2e376f222069570834ac63bf50111ef0cbf3ae417048ed89
 F src/wal.h ba252daaa94f889f4b2c17c027e823d9be47ce39da1d3799886bbd51f0490452
 F src/walker.c 7c7ea0115345851c3da4e04e2e239a29983b61fb5b038b94eede6aba462640e2
-F src/where.c c65f8862835077fdd6aefe8467990f4e50766d3a3fe96b976e81b04d83752750
+F src/where.c 692d3d72c6d616c03aae0864366deffc367ddd8b428ec8eb41223f40afe3e2f5
 F src/whereInt.h 82a13766f13d1a53b05387c2e60726289ef26404bc7b9b1f7770204d97357fb8
 F src/wherecode.c d5184620bcb5265d59072cb66e1386bfe0331a9ce7614286f9ab79a4fcd00fb8
 F src/whereexpr.c 67d15caf88a1a9528283d68ff578e024cf9fe810b517bb0343e5aaf695ad97dd
@@ -2193,8 +2193,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 1f2f9c709eaee3c45664afa062f0fb2b912de446581066c87ea144b8ba55b55c
-R 621f31ea7fc9d463b84af6cc3d551a91
+P 8ba2c2f5cb31f7bcc426bec78457316ef11d0b5debf24e8da8c6fc2f95878b1e
+R fd070e1c470e7cb887dfee0f031bfa9f
 U drh
-Z 9d869639496738a8fa8ca13e1d3ba3ec
+Z 87376a4b1930f95ae7c482e4326c0a9e
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-8ba2c2f5cb31f7bcc426bec78457316ef11d0b5debf24e8da8c6fc2f95878b1e
+1e49081001f93b75ee499536f8a61a0f49225a1745117bb9267249c38c4bf803

src/where.c

@@ -5286,9 +5286,9 @@ static int wherePathSolver(WhereInfo *pWInfo, LogEst nRowEst){
   **     -----      --------
   **       1            1            // the most common case
   **       2            5
-  **       3+          20
+  **       3+        8*(N-2)
   */
-  mxChoice = (nLoop<=1) ? 1 : (nLoop==2 ? 5 : 20);
+  mxChoice = (nLoop<=1) ? 1 : (nLoop==2 ? 5 : 8*(nLoop-2));
   assert( nLoop<=pWInfo->pTabList->nSrc );
   WHERETRACE(0x002, ("---- begin solver.  (nRowEst=%d, nQueryLoop=%d)\n",
                      nRowEst, pParse->nQueryLoop));