From: drh <>
Date: Fri, 15 Sep 2023 19:27:36 +0000 (+0000)
Subject: Minor simplification to the DISTINCT output row count change.
X-Git-Tag: version-3.44.0~194^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fheads%2Frethink-viewscan;p=thirdparty%2Fsqlite.git

Minor simplification to the DISTINCT output row count change.

FossilOrigin-Name: 0738386d7c505a98768ddaff7ff1fc76f115882d92d6f84bf136b4aa2caad8b8
---

diff --git a/manifest b/manifest
index 510c5900c5..7883893be5 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Do\snot\sreduce\ssubquery\soutput\srow\scount\sestimates\sdue\sto\sDISTINCT\suntil\nafter\sthe\sdecision\sof\swhether\sor\snot\sto\suse\san\sindex\sfor\sORDER\sBY\shas\sbeen\nmade.
-D 2023-09-15T19:00:47.376
+C Minor\ssimplification\sto\sthe\sDISTINCT\soutput\srow\scount\schange.
+D 2023-09-15T19:27:36.965
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -795,7 +795,7 @@ F src/vxworks.h d2988f4e5a61a4dfe82c6524dd3d6e4f2ce3cdb9
 F src/wal.c 01e051a1e713d9eabdb25df38602837cec8f4c2cae448ce2cf6accc87af903e9
 F src/wal.h ba252daaa94f889f4b2c17c027e823d9be47ce39da1d3799886bbd51f0490452
 F src/walker.c 7c7ea0115345851c3da4e04e2e239a29983b61fb5b038b94eede6aba462640e2
-F src/where.c bd10b322a40abc2ebfba61fd1f3c434052f68cf991487c4ed1da9c9f94aa0e87
+F src/where.c b05f3e60d576a0415948ca1e86754a3c564c0d9e89e3011e35f849cc4d818ef8
 F src/whereInt.h 4b38c5889514e3aead3f27d0ee9a26e47c3f150efc59e2a8b4e3bc8835e4d7a1
 F src/wherecode.c 5d77db30a2a3dd532492ae882de114edba2fae672622056b1c7fd61f5917a8f1
 F src/whereexpr.c dc5096eca5ed503999be3bdee8a90c51361289a678d396a220912e9cb73b3c00
@@ -2121,8 +2121,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 5a940e47d501f23347eaf084f4820e064e93665d19c8938c80715b71006ede8b
-R 708ef68b1a5a2dad2e7d5b5c554e468e
+P 27390051e86ad86fb35219329d359be9e83073f59782631af7fc519225e10565
+R 38093a5d0a73ed2782b293b0009addb5
 U drh
-Z 3822ece14e8e4a55dc3118a267231484
+Z 00aba278fb7af4364c7414b32687072d
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index 139acb4f86..56368e687c 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-27390051e86ad86fb35219329d359be9e83073f59782631af7fc519225e10565
\ No newline at end of file
+0738386d7c505a98768ddaff7ff1fc76f115882d92d6f84bf136b4aa2caad8b8
\ No newline at end of file
diff --git a/src/where.c b/src/where.c
index c10ab27a88..3a865d3f19 100644
--- a/src/where.c
+++ b/src/where.c
@@ -6134,11 +6134,9 @@ WhereInfo *sqlite3WhereBegin(
     }
 
     /* TUNING:  Assume that a DISTINCT clause on a subquery reduces
-    ** the output size by a factor of 8 (LogEst -30)
+    ** the output size by a factor of 8 (LogEst -30).
     */
-    if( (pWInfo->wctrlFlags & WHERE_WANT_DISTINCT)!=0
-     && pWInfo->nRowOut>=40
-    ){
+    if( (pWInfo->wctrlFlags & WHERE_WANT_DISTINCT)!=0 ){
       WHERETRACE(0x0080,("nRowOut reduced from %d to %d due to DISTINCT\n",
                          pWInfo->nRowOut, pWInfo->nRowOut-30));
       pWInfo->nRowOut -= 30;