From: dan <dan@noemail.net>
Date: Sat, 2 Jul 2011 15:42:12 +0000 (+0000)
Subject: Cherrypick change [27c65d4d9c] into the 3.7.2 branch.
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8e3b3330800660fc720cbe834ddd557a7c051b80;p=thirdparty%2Fsqlite.git

Cherrypick change [27c65d4d9c] into the 3.7.2 branch.

FossilOrigin-Name: 9bbcd8c076ce1add222da1f45ff4ee5ea2fcfc2e
---

diff --git a/manifest b/manifest
index 7e46f3a08a..b00599ac45 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Cherrypick\s[45e581bff7]\sinto\sthe\s3.7.2\sbranch.
-D 2011-07-02T13:34:15.849
+C Cherrypick\schange\s[27c65d4d9c]\sinto\sthe\s3.7.2\sbranch.
+D 2011-07-02T15:42:12.533
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 543f91f24cd7fee774ecc0a61c19704c0c3e78fd
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -230,7 +230,7 @@ F src/vtab.c 0e8e0cb30dffb078367e843e84e37ef99236c7e4
 F src/wal.c 5ac2119e23ee4424599d4275b66dc88d612a0543
 F src/wal.h 96669b645e27cd5a111ba59f0cae7743a207bc3c
 F src/walker.c 3112bb3afe1d85dc52317cb1d752055e9a781f8f
-F src/where.c ecdf9bfa72cc2b6dade7770abebd0f58520dc4c3
+F src/where.c f4561d5258681f94b663d81fe76f03ef6a524f0a
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/alias.test 4529fbc152f190268a15f9384a5651bbbabc9d87
 F test/all.test 6745008c144bd2956d58864d21f7b304689c1cce
@@ -257,7 +257,7 @@ F test/auth.test 26cc6f219580191539bf335abe03e55e49310846
 F test/auth2.test 270baddc8b9c273682760cffba6739d907bd2882
 F test/auth3.test a4755e6a2a2fea547ffe63c874eb569e60a28eb5
 F test/autoinc.test 85ef3180a737e6580086a018c09c6f1a52759b46
-F test/autoindex1.test fb1fe6a000ed0b3c2a4101cc4884313c3661e68e
+F test/autoindex1.test 5832aabf500dada692f325251a2231ab6b0e2d9a
 F test/autovacuum.test bb7c0885e6f8f1d633045de48f2b66082162766d
 F test/autovacuum_ioerr2.test 598b0663074d3673a9c1bc9a16e80971313bafe6
 F test/avtrans.test 0252654f4295ddda3b2cce0e894812259e655a85
@@ -850,7 +850,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 293327bc76823f473684d589a8160bde1f52c14e
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
-P 7155e6f3282671487f262fd51a7cb139dffdbde6
-R 6e0436030204a21a4eb3844cebd2fc86
+P c593792ce00d0a6379f31cab1bca22f5e159ce18
+R 4d654992cb4816a2a8066724f218a1f3
 U dan
-Z 721893e46221c159c6e716d0c7bd616b
+Z 449cb15ff909d159c8f79196788b498c
diff --git a/manifest.uuid b/manifest.uuid
index e5f7c63763..9bb06ac8f1 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-c593792ce00d0a6379f31cab1bca22f5e159ce18
\ No newline at end of file
+9bbcd8c076ce1add222da1f45ff4ee5ea2fcfc2e
\ No newline at end of file
diff --git a/src/where.c b/src/where.c
index ad6b6dd779..238f82203d 100644
--- a/src/where.c
+++ b/src/where.c
@@ -1903,6 +1903,10 @@ static void bestAutomaticIndex(
   WhereTerm *pWCEnd;          /* End of pWC->a[] */
   Table *pTable;              /* Table tht might be indexed */
 
+  if( pParse->nQueryLoop<=(double)1 ){
+    /* There is no point in building an automatic index for a single scan */
+    return;
+  }
   if( (pParse->db->flags & SQLITE_AutoIndex)==0 ){
     /* Automatic indices are disabled at run-time */
     return;
diff --git a/test/autoindex1.test b/test/autoindex1.test
index 7ffd644552..cee013b10a 100644
--- a/test/autoindex1.test
+++ b/test/autoindex1.test
@@ -165,4 +165,13 @@ do_test autoindex1-502 {
   }
 } {0 0 0 {SEARCH TABLE t501 USING INTEGER PRIMARY KEY (rowid=?) (~1 rows)} 0 0 0 {SCAN TABLE t502 (~100000 rows)}}
 
+
+do_execsql_test autoindex1-700 {
+  CREATE TABLE t5(a, b, c);
+  EXPLAIN QUERY PLAN SELECT a FROM t5 WHERE b=10 ORDER BY c;
+} {
+  0 0 0 {SCAN TABLE t5 (~100000 rows)} 
+}
+
+
 finish_test